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Products => Test Equipment => Topic started by: SimonD on March 24, 2017, 12:14:29 pm

Title: New Rigol DC Load DL3000 Series
Post by: SimonD on March 24, 2017, 12:14:29 pm
Rigol prepares a new target group instruments. DC Loads !

Take a look :

http://coral-i.co.za/DL3000%20datasheet%20201702-EN%20DSJ01100-1110.pdf (http://coral-i.co.za/DL3000%20datasheet%20201702-EN%20DSJ01100-1110.pdf)

This instruments needs a good software to pair. I hope Rigol this time to make it.
Looks like 2017 is a good year for fresh stuff in testing gears area !    ;)
Title: Re: New Rigol DC Load D3000 Series
Post by: plesa on March 24, 2017, 12:21:26 pm
Based on bad experience with their sw support and products like DC power supply I'm not sure if it will be good option.
Title: Re: New Rigol DC Load D3000 Series
Post by: alm on March 24, 2017, 12:48:06 pm
Connect it to the DP832 and see which of the two overheats or blows up its FETs first :P.
Title: Re: New Rigol DC Load D3000 Series
Post by: EEVblog on March 24, 2017, 01:06:32 pm
Jazzy.
Price?
Title: Re: New Rigol DC Load D3000 Series
Post by: Zbig on March 24, 2017, 01:43:44 pm
Big :-+ for sense terminals where it only makes sense (get it? ;)) - on the front. Like in my Array and unlike the Maynuo/BK Precision/Itech. Too bad about them being shrouded banana terminals, though - could be a PITA at times.
Title: Re: New Rigol DC Load D3000 Series
Post by: 2N3055 on March 24, 2017, 02:27:31 pm
I also like sense terminals on the front. Also it has Imon and Vmon BNC, so easy scope connection. I guess easier to use standalone, but Maynuo has software that is actually usable.. Rigol so far didn't make single piece of good PC software... They all look like something thrown together over weekend.... We'll see.  I really like my M9812, works well, just Vmon out and sense on the front on Rigol are very nice...
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on March 24, 2017, 02:29:28 pm
Jazzy.
Price?

Until now, i think, only Rigol knows     :D
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on March 24, 2017, 02:38:06 pm
And a photo from Batterfly :

https://twitter.com/BatterFlySrl/status/841943973321179136
Title: Re: New Rigol DC Load D3000 Series
Post by: Zbig on March 24, 2017, 02:47:55 pm
And a photo from Batterfly :

https://twitter.com/BatterFlySrl/status/841943973321179136

Off-topic comment after I saw the Twitter photo you posted: what's with Rigol and their PSU GUIs emulating low-contrast LED displays? As if faking a 7-segment display using high-resolution graphic LCD wasn't silly enough, they even mimic the still visible "off" segments for added non-legibility :palm:

EDIT:
Or was the LCD "persistence" of the power readout just the effect of the unfortunate timing and/or long exposure?
Title: Re: New Rigol DC Load D3000 Series
Post by: Dwaine on April 04, 2017, 03:49:12 am
Anybody pick one up?   $499.00 for the 200 watt looks like a nice price.  Maybe Dave could get one and do a tear down and review?
Title: Re: New Rigol DC Load D3000 Series
Post by: ass20 on April 04, 2017, 09:42:41 am
i read info ....
But it is do not support LED mode ...
It is need for me for testing led power supplys
Title: Re: New Rigol DC Load D3000 Series
Post by: thm_w on April 04, 2017, 07:27:23 pm
tequipment page: http://www.tequipment.net/Rigol/DL3021/Electronic-Loads/ (http://www.tequipment.net/Rigol/DL3021/Electronic-Loads/)
It looks like the DL3021 should be able to be hacked to DL3021A ($499 and $799), the specs are slightly confusing though.
Here are options:
Quote
LAN Interface LAN-DL3
Digital I/O Option DIGITALIO-DL3
Readback Resolution HIRES -DL3
High Frequency Option FREQ-DL3
High Slew Rate Option SLEWRATE-DL3

Disappointing without LED for sure, and they don't show much detail of the battery test: "Battery test function, OCP test, OPP test, factory test function, etc."
As others have pointed out, with rigol you want all these features on the device as software outside of that is not good.
Specs are good however.
Title: Re: New Rigol DC Load DL3000 Series
Post by: pascal_sweden on April 05, 2017, 10:36:50 am
Features: Single output, 150 V/40 A/15 kHz, total power up to 200 W

Shouldn't this strictly be called input? The DC load is consuming power from the Device Under Test.
It is pulling it in. So that's an input right? =)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on April 05, 2017, 11:03:42 am
Yessss, hopefully some affordable electronic loads
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dwaine on April 05, 2017, 01:56:00 pm
The LED testing is not built-in into the GUI.   I'm assuming that we could write some Python LED test software for it.

I'm wondering if the 15khz to 30khz is possible with a hack, or there is a hardware difference between the devices.

I think I'll pull the trigger, since I don't have a DC load test device.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Zbig on April 05, 2017, 02:48:15 pm
I'm curious, what's the deal with the dedicated LED testing mode? What's so specific about LED loads that warrants having some special mode for emulating those on a DC load?
Title: Re: New Rigol DC Load DL3000 Series
Post by: thm_w on April 05, 2017, 07:50:55 pm
I'm curious, what's the deal with the dedicated LED testing mode? What's so specific about LED loads that warrants having some special mode for emulating those on a DC load?

Quote
When using Electronic Loads, the CR and CV mode settings are set for when the LED is under stable operation and therefore, is unable to simulate turn on or PWM brightness control
characteristics. This may cause the LED driver to function improperly or trigger it’s protection circuits. These testing requirements can be achieved when using a LEDs as a load; however,
issues regarding the LED aging as well as different LED drivers may require different types of LEDs or a number of LEDs. This makes it inconvenient for mass production testing.
http://www.chromaate.com/product/63110A__63113A_63115A_LED_Load_Simulator.htm (http://www.chromaate.com/product/63110A__63113A_63115A_LED_Load_Simulator.htm)
http://adaptivepower.com/Resources/Documents/APS_App_Note_LED_Driver_Testing.pdf (http://adaptivepower.com/Resources/Documents/APS_App_Note_LED_Driver_Testing.pdf)

I think I'll pull the trigger, since I don't have a DC load test device.

Let me know where you purchase from.
Title: Re: New Rigol DC Load DL3000 Series
Post by: mr.os on April 06, 2017, 06:14:12 am
I found some prices on an Austrian site: http://www.rekirsch.at/Messtechnik/Messtechnik+Lasten/ (http://www.rekirsch.at/Messtechnik/Messtechnik+Lasten/)
DL3021: 439€ + VAT
DL3021A: 759€ + VAT
DL3031: 959€ + VAT
DL3031A: 1429€ + VAT

I think the base price is okay. But the step from 200W to 350W is far to high. You can get an Applent AT8612 for 360$ shipped (to Germany) on Aliexpress.
Hopefully the options can be hacked so that these prices don't matter  ;D

There was also the manual: http://www.rekirsch.at/user_html/1282834349/pix/a/media/DL3021/DL3000_UserGuide_EN20170217.pdf (http://www.rekirsch.at/user_html/1282834349/pix/a/media/DL3021/DL3000_UserGuide_EN20170217.pdf)
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on April 06, 2017, 07:46:59 am
The question is if they are ready to ship or is just in pre-order state?
I have nothing see yet in the official Rigol sites about.
Actualy if we can download the user's manual we can understand lot of things about the instrument.
 :P  (Edit.    Mr.OS have put a link. Great!) 
Title: Re: New Rigol DC Load DL3000 Series
Post by: mr.os on April 06, 2017, 07:56:59 am
All are in the pre-order state. You have to ask for the shipping time.
But I think the prices could be realistic - under 500$ for the base model and than on. The base model should have its designated price.
Hopefully the other model is not sooo expensive later and it is only a mistake yet.
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on April 06, 2017, 08:04:32 am
439 backs is a good price! Especially if the base model is hackable. >:D
I agree. The top model is over priced in my opinion. And probably the hardware is the same.
But the companion software is a big player in this area of instruments.
Title: Re: New Rigol DC Load DL3000 Series
Post by: mr.os on April 06, 2017, 08:13:42 am
I mean the price for the 350W model is to high. 520€ more for 150W? There must be a mistake. When it is around 600 to 700 it would be faire.
I think 320€ for all options (200W model; 470€ for the 350W model - why?) is okay even when it is not hackable. But there must be some error at his shp ... hopefully.
Title: Re: New Rigol DC Load DL3000 Series
Post by: diyaudio on April 06, 2017, 08:28:23 am
Looks good, I don't think the pc software is going to be anything near good judging them from previous experience.  Contact the software work to a Western Company in California. 
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on April 06, 2017, 03:16:11 pm
I mean the price for the 350W model is to high. 520€ more for 150W? There must be a mistake. When it is around 600 to 700 it would be faire.
I think 320€ for all options (200W model; 470€ for the 350W model - why?) is okay even when it is not hackable. But there must be some error at his shp ... hopefully.

I'd pay 500€ for the 200W model, no problems. Especially if its hackable. I really hope Batronix will get them fairly quick with a pricing around the 500€ marl for the 200W model. Of course less is always better, but I'm just trying to be realistic here.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on April 06, 2017, 03:43:44 pm
I see a leakage of information here  :-+
Do not expect any delivery before the mid of May  :popcorn:
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dwaine on April 06, 2017, 06:14:38 pm
Tequipment has them.   Let me go back and see if there was a delay in delivery.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on April 10, 2017, 12:50:55 pm
Evereywere I looked for the DL3000 Series it says 404. Maybe Rigol requested that the info of the e-load to be taken down for some reason ?
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on April 10, 2017, 12:52:28 pm
Evereywere I looked for the DL3000 Series it says 404. Maybe Rigol requested that the info of the e-load to be taken down for some reason ?
yes, official product launch is around mid of May  :-+
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on April 10, 2017, 12:57:02 pm
I know. I mean why take down all the info thats availabe now on for expample tequipment. The link provided from another user just says "404". Like other ones I looked up.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dwaine on April 11, 2017, 05:46:40 am
TEquipment pulled the web page.  It's gone.
Title: Re: New Rigol DC Load DL3000 Series
Post by: H.O on April 11, 2017, 05:48:59 am
Because they're pulling "a Siglent", raising the price by 40% between now and actual launch and don't want to be called out?
Title: Re: New Rigol DC Load DL3000 Series
Post by: tautech on April 12, 2017, 06:28:59 pm
Because they're pulling "a Siglent", raising the price by 40% between now and actual launch and don't want to be called out?
:wtf:
When did they do that ?  :-//
Title: Re: New Rigol DC Load DL3000 Series
Post by: H.O on April 12, 2017, 06:46:46 pm
Please see the Siglent NEW bench DMM thread (https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg1180736/#msg1180736).
Title: Re: New Rigol DC Load DL3000 Series
Post by: tautech on April 12, 2017, 07:02:59 pm
Please see the Siglent NEW bench DMM thread (https://www.eevblog.com/forum/testgear/siglent-new-bench-dmm-sdm3055/msg1180736/#msg1180736).
Well I have no idea where the originally proposed pricing came from and have always known better than portray any pricing until it's formally announced. In fact the only pricing I have is dealer pricing as yet, no retail at all so the price advertised is just conjecture.

BTW, I have a demo unit of 3065X coming and a 3055 demo on hand so will take some little time to compare results.
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 04, 2017, 03:43:53 pm
Here you can watch the product in the official rigol site with some more informations and some videos :

https://www.rigolna.com/products/dc-power-loads/dl3000/?utm_term=Learn%20More&utm_campaign=DL3000%20Launch&utm_content=landing+page&utm_source=Act-On+Software&utm_medium=landing+page&cm_mmc=Act-On%20Software-_-Landing%20Page-_-DL3000%20Launch-_-Learn%20More (https://www.rigolna.com/products/dc-power-loads/dl3000/?utm_term=Learn%20More&utm_campaign=DL3000%20Launch&utm_content=landing+page&utm_source=Act-On+Software&utm_medium=landing+page&cm_mmc=Act-On%20Software-_-Landing%20Page-_-DL3000%20Launch-_-Learn%20More)
Title: Re: New Rigol DC Load DL3000 Series
Post by: thm_w on June 05, 2017, 10:15:03 pm
Here you can watch the product in the official rigol site with some more informations and some videos :

https://www.rigolna.com/products/dc-power-loads/dl3000/?utm_term=Learn%20More&utm_campaign=DL3000%20Launch&utm_content=landing+page&utm_source=Act-On+Software&utm_medium=landing+page&cm_mmc=Act-On%20Software-_-Landing%20Page-_-DL3000%20Launch-_-Learn%20More (https://www.rigolna.com/products/dc-power-loads/dl3000/?utm_term=Learn%20More&utm_campaign=DL3000%20Launch&utm_content=landing+page&utm_source=Act-On+Software&utm_medium=landing+page&cm_mmc=Act-On%20Software-_-Landing%20Page-_-DL3000%20Launch-_-Learn%20More)

thanks, the battery mode doesn't look too bad. Although it does not generate curves on the instrument or the record data, from what I see.
You have to use their Ultra Load software to record the csv data, then make a plot in excel yourself.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dwaine on June 06, 2017, 09:07:19 am
I'm saving my pennies for this DC load.   Just when will it start to ship is the next question.

Title: Re: New Rigol DC Load DL3000 Series
Post by: BloodyCactus on June 06, 2017, 01:45:53 pm
interesting. dl3031 is 999, dl3031 is 1499...

"Five software-enabled licenses are optionally available to suit individual needs: (LAN-DL3, DIGITALIO-DL3, HIRES-DL3, FREQ-DL3, SLEWRATE-DL3)."

assumption, no lan/lxi by default.
Title: Re: New Rigol DC Load DL3000 Series
Post by: taemun on June 06, 2017, 01:49:32 pm
I see them up on Taobao  (https://world.tmall.com/item/548069629142.htm?spm=a312a.7700714.0.0.awzNci&skuId=3487942859429)for:
DL3021 2680 RMB = 395 USD = 350 EUR
DL3031 3580 RMB = 527 USD = 467 EUR

They're listed the 'A' variants at the same price, but I'm sure that's a placeholder.

<not threadjacking, just a point of comparison>
Maynuo M9711's are smaller, and about 1000 RMB cheaper than the DL3021 - but UI is a little primitive, the sense inputs are on the rear (and hidden in a settings menu), and there's no Ethernet (option.... thanks Rigol!). Of course, the mysteriously similar M9710 can be had for even less - about 1000 RMB total (https://world.taobao.com/item/538225398832.htm?spm=a312a.7700714.0.0.bfkRYe#detail)!

The Maynuo units have extremely fast screen updates though, which I love. I hope Rigol can get that right.
Title: Re: New Rigol DC Load DL3000 Series
Post by: BloodyCactus on June 06, 2017, 01:52:08 pm
saelig says 999 + 1499; could be placeholders tho

http://www.saelig.com/product/dl3031.htm (http://www.saelig.com/product/dl3031.htm)
http://www.saelig.com/product/dl3031a.htm (http://www.saelig.com/product/dl3031a.htm)

Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 07, 2017, 05:27:54 am
And here is another one from the international site with different style (better colored buttons in my opinion), the firmware to download and the starting price.

http://int.rigol.com/Product/Model/90/515 (http://int.rigol.com/Product/Model/90/515)


Maybe we can hope for a Dave's unique way review sometime ?     ;)
Title: Re: New Rigol DC Load DL3000 Series
Post by: R005T3r on June 07, 2017, 06:17:19 am
If you ask me, I'd be more concerned about the noise injected from the unit rather than the price itself: it's very annoying to have your measurement screwed up by things like that... Especially if you are going to make some ripple measurements or specification checks on other power supplies! Anyway, for less than 800 Eur it would be a fantastic choice for most of us!
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 07, 2017, 07:10:52 am
I Agree, but from the other hand what you give is what you get (i mean money).
Title: Re: New Rigol DC Load DL3000 Series
Post by: R005T3r on June 07, 2017, 09:24:02 am
Well, Should be interesting if Dave compares it with the BK precision he haves, results may be surprising, being in the same price range. Also it would be intersting to compare it with a kikosui one....
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 07, 2017, 10:58:26 am
... or a Chrome one ...        :D
Title: Re: New Rigol DC Load DL3000 Series
Post by: plesa on June 07, 2017, 03:41:44 pm
If you ask me, I'd be more concerned about the noise injected from the unit rather than the price itself: it's very annoying to have your measurement screwed up by things like that... Especially if you are going to make some ripple measurements or specification checks on other power supplies! Anyway, for less than 800 Eur it would be a fantastic choice for most of us!

For 1-1.2k EUR you can have used Agilent N3301A with module, so 800 EUR it expensive.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 10, 2017, 12:12:41 pm
Today is the official release day of the New RIGOL DL3000 DC Electronic Load for Europe
Title: Re: New Rigol DC Load DL3000 Series
Post by: R005T3r on June 10, 2017, 12:25:59 pm
If you ask me, I'd be more concerned about the noise injected from the unit rather than the price itself: it's very annoying to have your measurement screwed up by things like that... Especially if you are going to make some ripple measurements or specification checks on other power supplies! Anyway, for less than 800 Eur it would be a fantastic choice for most of us!

For 1-1.2k EUR you can have used Agilent N3301A with module, so 800 EUR it expensive.
The N3301A is definitley a not so compact one, and also you can't say it's a new instrument (replacement parts?). Besides you cannot have an Agilent or pretty much any other one for something as low as $500, especially if it's brand-new and you don't want to to the no name brands...

Also, for something like 1,2K EUR you can get a used kikusui load (and probably still save up something), but again, we are taking about brand-new vs used...
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 10, 2017, 04:28:34 pm
It could be very interesent a side by side hardware comparison between the two models 3021 (40A) and 3031 (60A), especially at the power stage part to see if they are so big differences to deserve this huge ammount difference of money. Allmost more than the double! As for the differences between simple and A models as i can see is probably only software licences ...
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 10, 2017, 05:10:13 pm
I have done these table, it may help to spot the differences faster.
Ciao
Title: Re: New Rigol DC Load DL3000 Series
Post by: smithnerd on June 10, 2017, 06:23:48 pm
I noticed a couple of things while I was poking around in the GEL firmware update file:

Mention of a DAC8560 voltage reference:

http://www.ti.com/product/DAC8560 (http://www.ti.com/product/DAC8560)

Mention of two other models, 3051 and 3051A - a future/canned 500W version?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dubbie on June 10, 2017, 06:53:13 pm
If you ask me, I'd be more concerned about the noise injected from the unit rather than the price itself: it's very annoying to have your measurement screwed up by things like that... Especially if you are going to make some ripple measurements or specification checks on other power supplies! Anyway, for less than 800 Eur it would be a fantastic choice for most of us!

Agreed. This is my main concern. My iTech is noisy as anything and also can't go down below about 10mA reliably. If this thing would be quiet and precise, I would look at replacing. Yes, an SMU would be better, but is 10x the price.
Title: Re: New Rigol DC Load DL3000 Series
Post by: R005T3r on June 11, 2017, 10:25:34 am
I noticed a couple of things while I was poking around in the GEL firmware update file:

Mention of a DAC8560 voltage reference:

http://www.ti.com/product/DAC8560 (http://www.ti.com/product/DAC8560)

Mention of two other models, 3051 and 3051A - a future/canned 500W version?
500W upgradeable by software license maybe? 
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 12, 2017, 11:14:18 am
it seems the DL3000 comes in two different color schemes:

non-A models
(http://int.rigol.com/File/ModelHomeImg/20170605/636322675490630521.jpg)

A models
(http://int.rigol.com/File/ModelHomeImg/20170605/636322676188139449.jpg)
Title: Re: New Rigol DC Load DL3000 Series
Post by: pascal_sweden on June 12, 2017, 01:44:33 pm
A models have an A-mazing look :)
Title: Re: New Rigol DC Load D3000 Series
Post by: tooki on June 12, 2017, 02:18:33 pm
And a photo from Batterfly :

https://twitter.com/BatterFlySrl/status/841943973321179136

Off-topic comment after I saw the Twitter photo you posted: what's with Rigol and their PSU GUIs emulating low-contrast LED displays? As if faking a 7-segment display using high-resolution graphic LCD wasn't silly enough, they even mimic the still visible "off" segments for added non-legibility :palm:

EDIT:
Or was the LCD "persistence" of the power readout just the effect of the unfortunate timing and/or long exposure?
I absolutely hate when designers mimic 7-segment displays. It makes no freaking sense. As a UI designer, you want it to be as usable as possible, so you should be choosing fonts that maximize legibility.

I sure as heck hope the "off" segments there are an artifact of photography, and aren't actually present. My guess is that it's an artifact, since the two upper display areas don't seem to have it at all.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 12, 2017, 02:21:53 pm
tooki, I have a DL3021 here on my desk, please tell me what you like to see and I take a picture and post it.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Aeternam on June 12, 2017, 02:46:34 pm
tooki, I have a DL3021 here on my desk, please tell me what you like to see and I take a picture and post it.

How about a teardown?  ;D  :-+
Title: Re: New Rigol DC Load DL3000 Series
Post by: mcinque on June 12, 2017, 06:11:37 pm
How about a teardown?  ;D  :-+
Naturally!!  :-+
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 13, 2017, 07:46:09 am
How about a teardown?  ;D  :-+
Naturally!!  :-+

Great idea !!!
Simone,
i m ready to pull the trigger for the DL3021  :P,  my application needs 24V at 25A ... 35A, can you make a quick test in this range please ?
P.S. (at Simone), any discount code as you have say in to the SDM3065X topic ?    ;)
Title: Re: New Rigol DC Load DL3000 Series
Post by: pascal_sweden on June 13, 2017, 08:31:10 am
P.S. (at Simone), any discount code as you have say in to the SDM3065X topic ?    ;)

Maybe you can try RIGOL-123-PASTA, or RIGOL-MAMA-MIA? :)
Title: Re: New Rigol DC Load DL3000 Series
Post by: tooki on June 13, 2017, 09:59:51 am
tooki, I have a DL3021 here on my desk, please tell me what you like to see and I take a picture and post it.
It's not clear from my reply, or the original comment I was replying to??

Look at the picture in:
And a photo from Batterfly :

https://twitter.com/BatterFlySrl/status/841943973321179136

See how on the watts display, the unlit segments are still kinda lit? (And on the V to a lesser degree.) Are the unlit segments actually there but less bright, or are they actually completely black, and what the picture shows is just artifacts from photography?
Title: Re: New Rigol DC Load DL3000 Series
Post by: ebastler on June 13, 2017, 11:09:53 am
Look at the picture in:
https://twitter.com/BatterFlySrl/status/841943973321179136

See how on the watts display, the unlit segments are still kinda lit? (And on the V to a lesser degree.) Are the unlit segments actually there but less bright, or are they actually completely black, and what the picture shows is just artifacts from photography?

So you are not wondering about the DL3021 load at all, but about the DL700 power supply which sits on top of it in the photo, right?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Kleinstein on June 13, 2017, 11:30:33 am
I would expect the half lit segments on the power supply to be an artifact from changing numbers during exposure.
Title: Re: New Rigol DC Load DL3000 Series
Post by: tooki on June 13, 2017, 12:31:19 pm
Look at the picture in:
https://twitter.com/BatterFlySrl/status/841943973321179136

See how on the watts display, the unlit segments are still kinda lit? (And on the V to a lesser degree.) Are the unlit segments actually there but less bright, or are they actually completely black, and what the picture shows is just artifacts from photography?

So you are not wondering about the DL3021 load at all, but about the DL700 power supply which sits on top of it in the photo, right?
I wasn't wondering at all. Just agreeing with/elaborating on someone else's comment.
Title: Re: New Rigol DC Load DL3000 Series
Post by: ebastler on June 13, 2017, 01:03:26 pm
So you are not wondering about the DL3021 load at all, but about the DL700 power supply which sits on top of it in the photo, right?
I wasn't wondering at all. Just agreeing with/elaborating on someone else's comment.

Sure. But you were asking for details on the DL700 (the instrument sitting on top in the Batterfly photograph, with the simulated 7-segment display).  In contrast, simone.pignatti had offered to take pictures of his DL3021, and probably does not have a DL700. Just trying to clarify...
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 13, 2017, 01:44:48 pm
P.S. (at Simone), any discount code as you have say in to the SDM3065X topic ?    ;)

Maybe you can try RIGOL-123-PASTA, or RIGOL-MAMA-MIA? :)

LOL
We have discount code, just send a PM, we will try to make a funny one :)
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 13, 2017, 01:48:05 pm
So you are not wondering about the DL3021 load at all, but about the DL700 power supply which sits on top of it in the photo, right?
I wasn't wondering at all. Just agreeing with/elaborating on someone else's comment.

Sure. But you were asking for details on the DL700 (the instrument sitting on top in the Batterfly photograph, with the simulated 7-segment display).  In contrast, simone.pignatti had offered to take pictures of his DL3021, and probably does not have a DL700. Just trying to clarify...

Sorry if I messed up...
Yes we have  DP711 and DP712 to try together with the DL3021
Now I'm traveling, I can do from next Monday on

tooki, sorry again

ciao
Title: Re: New Rigol DC Load DL3000 Series
Post by: maukka on June 13, 2017, 03:21:00 pm
Thanks to Simone(?) for answering my question on Youtube about the watt-hour display (which I totally think they should include in the battery test display). I also edited my second question and wasn't sure if you noticed that. I went through the manual, but can't confirm whether it's possible to log csv data on a USB flash drive.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 13, 2017, 04:10:27 pm
I'm not sure you can download straight from the unit to a USB stick
However the Rigol Ultra Load PC Software is free of charge, you can get it here:
https://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0781/1/-/-/-/-/S1501%20Ultra%20Load%28PC%29Install_00.01.00.02.zip
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dubbie on June 14, 2017, 04:34:18 am
I am really hoping they release a new power supply with this new case and screen design.

Would be a big improvement over the old one.
Title: Re: New Rigol DC Load DL3000 Series
Post by: pascal_sweden on June 14, 2017, 06:16:52 am
I am really hoping they release a new power supply with this new case and screen design.

Would be a big improvement over the old one.

And hopefully all 3 voltage outputs will be completely isolated like on the Siglent power supply.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dwaine on June 14, 2017, 06:47:01 am
I hope Dave gets a unit and does a tear down of the A model.   :popcorn:
Title: Re: New Rigol DC Load DL3000 Series
Post by: tooki on June 14, 2017, 08:37:26 am
So you are not wondering about the DL3021 load at all, but about the DL700 power supply which sits on top of it in the photo, right?
I wasn't wondering at all. Just agreeing with/elaborating on someone else's comment.

Sure. But you were asking for details on the DL700 (the instrument sitting on top in the Batterfly photograph, with the simulated 7-segment display).  In contrast, simone.pignatti had offered to take pictures of his DL3021, and probably does not have a DL700. Just trying to clarify...

Sorry if I messed up...
Yes we have  DP711 and DP712 to try together with the DL3021
Now I'm traveling, I can do from next Monday on

tooki, sorry again

ciao
Still, appreciative of your offer to help, even if I don't need it myself!  ;D
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 15, 2017, 05:37:58 am
I am wondering if two or more pieces can work parallel ... (via Digital I/O synchronization for example) as other manufacturer devices ...
Title: Re: New Rigol DC Load DL3000 Series
Post by: R005T3r on June 15, 2017, 12:33:33 pm
Apparently, they have an I/O port on the back which is used for enabling/disabling the input... But the manual don't mention any synchronization feature....
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 15, 2017, 01:38:08 pm
Yeah ... i have seen that ... but i was hoping to be a hidden function    :P
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 15, 2017, 01:40:32 pm
load can only be connected together in parallel and in constant current mode. Not in the other modes (CV, CR, CP) and not in serial.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on June 19, 2017, 06:22:36 am
Thanks to Simone(?) for answering my question on Youtube about the watt-hour display (which I totally think they should include in the battery test display). I also edited my second question and wasn't sure if you noticed that. I went through the manual, but can't confirm whether it's possible to log csv data on a USB flash drive.
Hello Maukka, is the Watt/Hours a requirement for Battery Test Mode only or also when using Constant Power Mode?
Thanks
Title: Re: New Rigol DC Load DL3000 Series
Post by: maukka on June 19, 2017, 01:49:07 pm
Hello Maukka, is the Watt/Hours a requirement for Battery Test Mode only or also when using Constant Power Mode?
Thanks

I would have hoped I'm not restricted to only a constant current mode on the battery test, but that seems to be the case after checking the manual. The constant power mode should be extended to the battery test mode too. In that case I only need the Wh meter on the battery test, but why not make it available on the normal tests too?
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 21, 2017, 06:04:01 am
load can only be connected together in parallel and in constant current mode. Not in the other modes (CV, CR, CP) and not in serial.

Better than nothing!
Have you test this possibility? How can be done this ? Is there any synchronizing topology between the devices?
From this depends if we can have a hope for the rest of functions in a future firmware update.  Can you give us an example or more information's about it?
Thank you.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Zbig on June 21, 2017, 07:54:04 am
Better than nothing!
Have you test this possibility? How can be done this ? Is there any synchronizing topology between the devices?
From this depends if we can have a hope for the rest of functions in a future firmware update.  Can you give us an example or more information's about it?
Thank you.

Friendly advice: never buy anything on the premise of a feature (either promised let alone just hoped-for) being possibly added in some future firmware update sometime. Make your buying decisions based on what the thing already is and treat the possibility of something being added with some future firmware release merely as a bonus.
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on June 21, 2017, 08:39:26 am
Better than nothing!
Have you test this possibility? How can be done this ? Is there any synchronizing topology between the devices?
From this depends if we can have a hope for the rest of functions in a future firmware update.  Can you give us an example or more information's about it?
Thank you.

Friendly advice: never buy anything on the premise of a feature (either promised let alone just hoped-for) being possibly added in some future firmware update sometime. Make your buying decisions based on what the thing already is and treat the possibility of something being added with some future firmware release merely as a bonus.

You have right, most times firmware updates just fix some malfunctions. But they are some cases that add's  new futures where this is possible.
This future is not so critical for my applications. I can live without it! But it could be nice (if that works for CC until now) for someone to know if this function can work better with a simple  firmware update.
This movement adds value in the device. Buing another same type gear in the future you can almost double your investement for this instruments field.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on June 24, 2017, 04:48:43 pm
Earlier this week I got myself the small model (DL3021), and had a quick play with it today. Just to get a feel for the instrument.
First impression was: Damn... That thing is big and heavy. At work we have some of the Maynuo 300W loads, and they are small and light as a feather in comparison.
After playing with the various modes, I got the impression it does pretty much what it says it does. There are some weird quirks here and there though:

First the graphical view of current, voltage or power. It draws the newest value to the left, and then scroll the graph to the right. Like a scope running in reverse. :wtf: That one is going to drive me bonkers.

I had a couple of weird incidents where the load did not do what I asked it to do. One time in constant power, where I had it happily pulling 100W from a power supply, and while adjusting the voltage and current limits of the PSU (not touching the load), it suddenly went to 1W power draw. I could change the power setting on the screen, it still drew only 1W. I turned the input off (it did so), and back on... Still 1W. Only when going to another mode like CC, and then bak to CP, it came back to life and pulled the power I set it to.
Another similar bug was in battery test mode, where the current was 0.1A no matter what I set it to. Go to CC mode and back and the problem was solved.

And lastly: Why the heck is there a short circuit button near the input on/off button? It may be a convenient function when testing power supplies, but one accidental push of that button while I have a Lithium polymer battery pack connected?!?  :scared:
At the very least it should be possible to disable that button in the settings. Hopefully they will add that in a firmware update.
Title: Re: New Rigol DC Load DL3000 Series
Post by: I4E on June 25, 2017, 10:33:52 pm
Hello

Thank you for sharing your experience.  We are also distributors for Maynuo so do know what you mean about the units being light.  Have you been happy with the Maynou Electronic loads you've bought?
  Have you fed your comments about the Electronic Load back to Rigol yet? If not would you mind if I do?  If you have any other suggestions please let me know.  They like to hear from customers and typically will act on suggestions especially when it's a new product that's just been released.


Have a great day everyone!

Joy Torres
Instruments 4 Engineers
info@instruments4engineers.com

www.instruments4engineers.com (http://www.instruments4engineers.com)

Authorized Distributors for Rigol, Maynuo and more
Currently in talks with Siglent about being distributors

Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on June 26, 2017, 06:58:20 am
I don't have a Maynuo myself, but the power supply designers at my workplace have several. They are quite pleased with them.

I have not contacted Rigol yet. I wanted to do some controlled tests to see if I could recreate the errors in a consistent way. It is always better if you can demonstrate the error, instead of just saying that I saw it do something weird but not knowing what triggered it. Yes, I am a software developer myself, and I know how frustrating it is to get a bug report without solid evidence to go by.

If you want to, you shall be very welcome to contact them.
I would really like a way to disable the short circuit button. I feel it is an accident waiting to happen.
It would be nice to get the graph view to go the normal way.
And as someone else mentioned earlier, it would be very useful to have the choice between constant current and constant power in the battery test.

I will try to recreate the non-responsive power and/or current draws.
Title: Re: New Rigol DC Load DL3000 Series
Post by: I4E on June 26, 2017, 02:41:03 pm
Thank you .. I've sent your comments to Rigol.  If you find anything else while you do more testing please let me know.   I appreciate your feedback.

Hope you have a lovely day!

Sincerely

Joy Torres
Instruments 4 Engineers
www.instruments4engineers.com (http://www.instruments4engineers.com)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on June 27, 2017, 05:54:56 pm
I will try to recreate the non-responsive power and/or current draws.
I have tried all sorts of things, but now the load just works every time. Which is a good thing I guess  ;D
Title: Re: New Rigol DC Load DL3000 Series
Post by: I4E on June 28, 2017, 12:45:01 am
 :D    I spoke to Rigol and they were really grateful for your feedback.


Joy Torres
Instruments 4 Engineers
info@instruments4engineers.com
www.instruments4engineers.com (http://www.instruments4engineers.com)

Authorized Distributors for Rigol and more
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on July 04, 2017, 02:10:41 pm
Our custom cables have arrived! we are ready to test DL3000 against DP800
Post here your testing requirements!
Title: Re: New Rigol DC Load DL3000 Series
Post by: Dubbie on July 04, 2017, 11:39:51 pm
My gosh, that faceplate is a graphic design crimescene.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Pinkus on July 05, 2017, 06:30:34 pm
My gosh, that faceplate is a graphic design crimescene.
+1
I agree. Sometimes Rigols design is OK (e.g. DS2000 series), sometimes it is just awful (like the power supply or this new load). Design consistency seems to be an alien concept for them. I wonder if these left skewed buttons on the top are on purpose or just a mistake happened during converting graphics files  :-DD

Edit: I just checked out the buttons: the buttons come in 9 different shapes .... OMG.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on July 05, 2017, 06:33:51 pm
How loud is it under load ? Say, I want to know ho much charge in a lead acid battery is left and I'm discharging it with 10A or similar.
I'm planning to buy the DL3021 for my home lab.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on July 05, 2017, 07:15:34 pm
I am happy that my non-A version is more discrete with its white/grey front.
About the fan noise, it is not bad. My Agilent U8002A power supply is louder. I haven't tried running the load at max power for extended periods of time, so it may be able to get louder.
Title: Re: New Rigol DC Load DL3000 Series
Post by: giovannirat on July 06, 2017, 01:04:57 pm
RIGOL loads now available at Batronix....
http://www.batronix.com/shop/load/loads.html (http://www.batronix.com/shop/load/loads.html)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on July 06, 2017, 01:21:24 pm
I'm going to get mine from them, after I got my money from work this summer
Title: Re: New Rigol DC Load DL3000 Series
Post by: SimonD on July 10, 2017, 04:00:11 pm
Can any owner make a simple test and post a photo?
Preferred model 3021.
Input : 24V-25A Load (or more Amps) in C.C. mode.
What is the result of voltage returned ? (Drop voltage).
What is the result in about 1KHz ... 3KHz, 50% PWM Source? Noise, spikes etc ? (If this test is possible!)

Thanks in advance!
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on July 10, 2017, 04:49:03 pm
Meh, Batronix has now a 19-40 day waiting time for the base model to arrive, because it's sold out atm
Title: Re: New Rigol DC Load DL3000 Series
Post by: hwj-d on July 11, 2017, 03:09:47 pm
Meh, Batronix has now a 19-40 day waiting time for the base model to arrive, because it's sold out atm

The Rigol DL3031A is in stock  ;D
atm...
Title: Re: New Rigol DC Load DL3000 Series
Post by: lukaq on July 13, 2017, 02:24:55 pm
Dave,
is there any plan of getting one?
Title: Re: New Rigol DC Load DL3000 Series
Post by: mcinque on July 13, 2017, 07:39:20 pm
teardown, teardown!!  :popcorn:
Title: Re: New Rigol DC Load DL3000 Series
Post by: Robaroni on July 31, 2017, 11:17:17 pm
What's the difference between the 3021 and 3021A?
Title: Re: New Rigol DC Load DL3000 Series
Post by: H.O on July 31, 2017, 11:38:59 pm
https://www.eevblog.com/forum/testgear/what-is-the-difference-between-a-rigol-dl3021-and-the-dl3021a/ (https://www.eevblog.com/forum/testgear/what-is-the-difference-between-a-rigol-dl3021-and-the-dl3021a/)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Worsdier on August 05, 2017, 12:51:05 pm
I was so excited when I saw this DC Load today and was about to order one, but then noticed that the battery test function doesn't display capacity in watt-hours on the device. I hope this gets added in a firmware update.

I don't understand why all the DC loads only test battery capacity in Ah. I sent Array and email requesting a firmware update so that it can display the battery capacity in Wh for my 3720A and about a week later I received a firmware file via email that supposedly adds this, however the firmware file is for the 3721A model and didn't work. I'm still hoping to receive the correct firmware file for my model, because it's a pain in the ass writing a script to do this calculation on a PC when it's so much more convenient if the device can do it.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Zbig on August 05, 2017, 01:16:02 pm
I sent Array and email requesting a firmware update so that it can display the battery capacity in Wh for my 3720A and about a week later I received a firmware file via email that supposedly adds this, however the firmware file is for the 3721A model and didn't work. I'm still hoping to receive the correct firmware file for my model, because it's a pain in the ass writing a script to do this calculation on a PC when it's so much more convenient if the device can do it.

Fun fact: I'm testing the battery capacity with a 3721A right now. Do you know if they plan on releasing the firmware version officially? Or maybe you could hook me up with yours?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Worsdier on August 05, 2017, 01:29:42 pm
I sent Array and email requesting a firmware update so that it can display the battery capacity in Wh for my 3720A and about a week later I received a firmware file via email that supposedly adds this, however the firmware file is for the 3721A model and didn't work. I'm still hoping to receive the correct firmware file for my model, because it's a pain in the ass writing a script to do this calculation on a PC when it's so much more convenient if the device can do it.

Fun fact: I'm testing the battery capacity with a 3721A right now. Do you know if they plan on releasing the firmware version officially? Or maybe you could hook me up with yours?

I actually do not think they plan on releasing it officially, because this update is v1.53 and the latest one on the website is only v1.43. Even the updater utility I received is a year newer than the one on their website.

I'll gladly share the v1.57 update for the 3721A with you and you can let me know if it actually adds Wh readings to the battery test function. Send me your email address and I'll mail you the firmware and update utility right away.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Worsdier on August 10, 2017, 05:04:34 am
I sent Rigol an email requesting them to add Constant Power mode to the Battery Test function in order to measure battery capacity in Wh. I received an email back that they already have this feature in the pipeline and that it's expected to be ready at the end of the month. I'm really happy about that.

Are there any members on the forum with DL3000 series loads that would be willing to notify us on the forum when this feature gets added to the firmware? I would like to order a DL3021A if Rigol adds this feature to the load.
Title: Re: New Rigol DC Load DL3000 Series
Post by: maukka on August 10, 2017, 06:07:18 am
I sent Rigol an email requesting them to add Constant Power mode to the Battery Test function in order to measure battery capacity in Wh. I received an email back that they already have this feature in the pipeline and that it's expected to be ready at the end of the month. I'm really happy about that.

That's great news! Anyone tested if the Rigol loads have the same problem as their power supplies that their PC control software doesn't work with region settings that use comma as the decimal point (https://www.eevblog.com/forum/testgear/rigol-dp832-and-ultrapower-(ultra-sigma)/msg1146919/#msg1146919)?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Smokey on August 22, 2017, 02:23:35 am
cool
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 05, 2017, 09:17:30 am
Yesterday my new DL3021A arrived.
The first thing i noticed was that when i am just enabling the input it constantly show a current of around 2.2 mA even when not connected to any source. And in 4A-Mode where the spec of the current setting would allow a maximum of 2mA.
Ugh... A further look into the spec tells me that this value is within spec because - other than other loads - this device only has one current readback range. Other devices are using at least similar or even the same setting and readback-ranges. It's accuracy is specified with +-(0.05%+0.05%FS). FS is 40A, so up to 20 mA without any load would still be in spec.  :palm: WTF... why is there no 0 to 4A readback range with an accuracy similar to the input mode of the device?   |O

During testing i struggled in the constant resistance mode. I connected a 1.5V battery, switched to CR Mode, pressed 15, then "kOhm". The display showed "15 kOhm". After enabling, the device pulled around 70 mA from the Battery (and showed 15 Ohm in it's display). 

The last time i got a new rigol device - function generator DG1062z - i had to exchange the device multiple times until i go a satisfying one. The first one had a hardware-failure, the second one was out of spec in frequency accuracy, the third one was acceptable (but there still was an software error when using the external 10Mhz-source after powering off the device).

I am really not shure if i will keep this rigol load. Maybe Maynuo would be more satisfying?  :-// What are the disadvantages of Maynuo?
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 05, 2017, 09:37:48 am
I am really not shure if i will keep this rigol load. Maybe Maynuo would be more satisfying?  :-// What are the disadvantages of Maynuo?

I haven't found any so far... It doesn't have fancy graphic screen, so for graphical approach you use software on a PC (which is pretty good). In a battery mode there is no W/hour measurements only A/hour...  Everything else looks just perfect so far...
Title: Re: New Rigol DC Load DL3000 Series
Post by: H.O on September 05, 2017, 10:11:27 am
Although the Maynuo 97/98-series loads are programmable they're not LXI and/or SCPI, it's got no USB or Ethernet port, instead it uses MODBUS RTU over a un-isolated (ie the common for the TX/RX-signals is connected to negative terminal of the input) TTL-level UART-connection for which you generally would want to use their M-131 or M-133 isolated level translator cable - or a similar DIY type of thing.

If you're into automation and have other instruments speaking SCPI then having to mess around with MODBUS as well may be a disadvantage.

Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 05, 2017, 10:29:38 am
ah... from what i can actually see the main disadvantage for me is that the Mayunos have no selectable slew-rate setting.  Automation wouldn't be a big issue as long as there is a good pc-software to get graphs for documentation purposes.
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 05, 2017, 10:33:35 am
MODBUS is mature industry standard.. Very robust and versatile, and not that hard to learn and use.. Isolated cable is no problem, to make or buy. You can also connect to RS485 and run  400 meters cable run ... Also, with RS485, it's a bus, so you can connect multiple devices on a same cable, each with it's address... Maynuo supports that mode...
All registers and commands are explained in user manual.. And from a program you speak to it as a normal serial port, so no special libraries.. You need to calculate checksums on packets, but that is not hard to write (once) or there is tons of ready made libs in C, python and whatnot ..

If you are into automation, you need to know MODBUS anyways....  ^-^
Don't look at it as a hardship but as an opportunity to learn..
Title: Re: New Rigol DC Load DL3000 Series
Post by: H.O on September 05, 2017, 11:11:38 am
Quote
MODBUS is mature industry standard.. Very robust and versatile, and not that hard to learn and use..
Oh, absolutely, it's a mature industry standard, I wasn't saying or implying it wasn't.

Quote
If you are into automation, you need to know MODBUS anyways....
If you're into industrial automation yes, most likely you should know MODBUS. But I'm not equally sure MODBUS is that common in T&M automation - scopes, power supplies, spectrum analyzers, that kind of thing. And if the rest of your test setup uses LXI then having to deal with MODBUS over a serial connection might be considered a disadvantage over an instrument that does support LXI, that's all I'm saying.

Quote
Don't look at it as a hardship but as an opportunity to learn..
It all depends on who's buying and for what. It might be you have been assigned a task to complete, you might want (or might have to) choose the path of least resistance, because the task has to be finished in a timely manner. Then having to deal with (and possibly learn from scratch) another protocol might, again, be a disadvantage. If you're not even DOING any automation then obviously it doesn't matter much - if at all.

I have a Maynuo e-load and it's the only programmable instrument on my shelf that uses MODBUS, my other four programmable instruments all uses SCPI, to me that's a disadvantage even though I do know MODBUS fairly well, having written uC code for MODBUS RTU.
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 05, 2017, 11:38:31 am
ah... from what i can actually see the main disadvantage for me is that the Mayunos have no selectable slew-rate setting.  Automation wouldn't be a big issue as long as there is a good pc-software to get graphs for documentation purposes.

Of course they have, who told you that? You can set rise and fall time separately, from 0.1/usec to 30 sec in transient mode... It is annoying that you can't do it interactively though...

Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 05, 2017, 12:01:21 pm
Of course they have, who told you that? You can set rise and fall time separately, from 0.1/usec to 30 sec in transient mode... It is annoying that you can't do it interactively though...

Ah... this is what i saw in the manual (it was not mentioned anywhere). But now as you were speaking about it i did search again. I was only looking for the terms of slew rate. When looking for rise time, i can find the references. So another checkmark on the positive side of maynuo.  :-+
Title: Re: New Rigol DC Load DL3000 Series
Post by: CustomEngineerer on September 06, 2017, 12:47:29 am
The last time i got a new rigol device - function generator DG1062z - i had to exchange the device multiple times until i go a satisfying one. The first one had a hardware-failure, the second one was out of spec in frequency accuracy, the third one was acceptable (but there still was an software error when using the external 10Mhz-source after powering off the device).

Unfortunately this seems to be par for the course when Rigol first brings a new device to market.

Quote
I am really not shure if i will keep this rigol load.

I would definitely recommend testing it as much as you can, and if you aren't comfortable that you can live with the bugs you (and others) will surely find, definitely go ahead and send it back while you can. For the most part they do seem to eventually get thing sorted out, however its not something I would count on to happen for sure.
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 07, 2017, 02:00:01 pm
Hmm... i am still tinking about which device would be better.

The Maynuo seems to support only CC-Operation in List mode.
The Rigol supports CC, CV, CR, CP-Operation in List Mode.

Actually i am waiting for an answer from the support people if there is a user calibration procedure for the rigol available/possible.

The Rigol PC-Software (Ultra Load) for remote access looks fine to me as a control-software. But it seems that it is not able to store the graphs recorded and even the date can only be stored as CSV. Maynuo supports an internal formad and exports to excel and word. Also it is not possible to make some graphical cursor measurements as with Maynuo. And it seems to be not possible to use the tests from the software. This makes the software nearly useless. One aspect of modern devices is that it must be possible to store data for later use. Or is there some feature hidden for my eyes in this software?

Another aspect i am thinking about: Rigol wants the Rise-Time setting entered as a Slew-Rate, Maynuo as the time itself. In many cases the slew-rate entry needs some calculation.

And Rigol misses the LED operation. But this is something i do not need currently.
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 07, 2017, 02:35:35 pm

The Maynuo seems to support only CC-Operation in List mode.

On a device yes..

From software, in Program tab, you can program steps in all 4 modes... Also, in Autotest tab, you can program in MIXED modes in every step,measure and create pass-fail criteria, log results to a database, make reports and export to Excel and Word..
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 07, 2017, 03:06:48 pm

On a device yes..

From software, in Program tab, you can program steps in all 4 modes... Also, in Autotest tab, you can program in MIXED modes in every step,measure and create pass-fail criteria, log results to a database, make reports and export to Excel and Word..

Ah, i see, thank you for that hint. In Autotest it is available and the List mode uses the setting that has been selected on the "Main Panel".

Do i interpret the list mode settings and the Graph correctly, the device will not "jump" from one current value to the next at the end of the delay time, instead it will make a smooth and floating transition?
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 07, 2017, 07:05:16 pm
Do i interpret the list mode settings and the Graph correctly, the device will not "jump" from one current value to the next at the end of the delay time, instead it will make a smooth and floating transition?

Unfortunately, no, it is step transitions, but you can have hundreds of steps and arbitrary resolution, so you can approximate linear ramps ..
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 08, 2017, 09:04:50 am
Unfortunately, no, it is step transitions, but you can have hundreds of steps and arbitrary resolution, so you can approximate linear ramps ..

Mhh... maybe a feature comparison table could be a good idea for my decision. Why didn't rigol make a device that is better in every aspect than the competition (which sells devices that are several years old). They have several interesting small ideas implemented that i cannot find in the Maynuo, but is it worth to buy Rigol when there are some disadvantages on the other end of the table?

Actually i am thinking about the isolation of the rear bnc-output for current/voltage monitoring of the DL3000. It would be nice if it is isolated (but i am assuming that it is not).
Also i could not find any exact information if the DL3000 rear Voltage monitor output reads back the Input or the Sense Terminals when they are in enabled.
Title: Re: New Rigol DC Load DL3000 Series
Post by: jackenhack on September 08, 2017, 03:32:37 pm
I have a Maynuo DC load, but I can't use it when measuring noise on the DC line because the load inject a lot of noise. I think I remember an episode of Daves video with the BK Precision that had the same problem. Anyone knows if this unit is usable for noise measurements of power supply under load?
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 08, 2017, 04:07:32 pm
I have a Maynuo DC load, but I can't use it when measuring noise on the DC line because the load inject a lot of noise. I think I remember an episode of Daves video with the BK Precision that had the same problem. Anyone knows if this unit is usable for noise measurements of power supply under load?

Are your observations similar to the ones described here?
https://www.eevblog.com/forum/testgear/dc-electronic-load-induced-noiseq/ (https://www.eevblog.com/forum/testgear/dc-electronic-load-induced-noiseq/)

Interesting to see: some Series of the Maynuo Loads (I.e. M88-Series) do have ripple/noise information in their specs. I could also find information in older agilent DC load datasheets, but none in the Rigol documentation.
Title: Re: New Rigol DC Load DL3000 Series
Post by: jackenhack on September 08, 2017, 06:05:17 pm
Yeah, it's kind of weird (at least for my feeble brain) that what is essentially a MOSFET drawing power should introduce noise?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Smokey on September 08, 2017, 08:42:30 pm
Yeah, it's kind of weird (at least for my feeble brain) that what is essentially a MOSFET drawing power should introduce noise?

Loads are just control loops, and having an unknown dynamic source (which itself is a control loop in the case of a regulated power supply) can lead to tuning and stability issues.  Really hot loops inject noise sometimes.
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 09, 2017, 10:05:37 pm
Okay, measuring the ripple/noise has been the decision-maker. Rigol has to go back.

I got an Maynuo M9812 for comparison. It has been sent with an factory calibration sheet with good calibration data, but this was useless: dated 2015-10-28. Now, two years later - this device now has completely different data and is out of spec: its current setting has an zero offset of 1,95 mA in the 3A range (Tolerance is +-1,5 mA).

But the ripple/noise test gave good results.

With the Maynuo i got a noise/ripple measurement of <0,17 mV(Ueff) at 10mA load and < 0,4mV(Ueff) at 5A load in the range of 20 Hz-4 MHz.

This was the point where Rigol had a total failure. Starting at 1A it showed oscillations with 3,5 MHz at 30 mV(Ueff). When switching the Power Source off and on again, the oscillation stopped and i could measure a ripple up to 4,3 mV(Ueff) at 5A. 10 times worse than the Maynuo.

Switching the Rigol Load input off and on restarted the oscillation. I tried this with three different Power supplies and different lengths of the connection cables, this did not change the oscillation behavior, so it is very likely that this is a problem of the Rigol.
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 21, 2017, 08:30:31 am
Arghhh... the last days i did some further measurements.  Totally showstopper on the Manyuo.. |O

With the rigol the user can pre-select the slew-rate. But in the Manyuo spec-sheet you even rarely find any information about the slew-rate. As it was mentioned somewhere in the spec-sheet i was thinking of about 2,5A/?s. But going deeper in detail i could see that the maynuo do not have a constant slew-rate. Regardless what step-size is done, the step always takes around 12 ?s. So i.e for a 1A Step this would be 0,08A/?s.

A rule of thumb is that if you want to measure the Transient recovery time of an power supply you should inject a step with a rise-time of at least 1/5 of the expected recovery time. Even an old and rubbish HP E3615A Power supply has a recovery time of 50 ?s - and therefore cannot be tested correctly with this device.  :wtf:

Rigol seems to win this competition.  :-//
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 21, 2017, 09:16:50 am
In dynamic mode you can set rise an fall time independently, from microsecond to few hours... ???
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 21, 2017, 09:35:01 am
In dynamic mode you can set rise an fall time independently, from microsecond to few hours... ???

The smalles step that is executed in dynamic mode is 40 microseconds (even with an rise- or falltime-setting of 0). This seems to be the internal minimum setting time of the device.

A look at the spec-sheet gives the information that T1&T2 is in the range of 60 mikroseconds to 999s.

The 12 mikroseconds i've measured are fro 10% to 90%. Measuring from the visible start of the change to it's end on the trace (where it's flattened) are very close to 20 mikroseconds.

Maximum frequency of transition list is 25 kHz - this would be exactly 20 microseconds for rise or fall within a full sine wave.
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 21, 2017, 11:25:53 am
Sorry  if it sounds obvious, but how are you measuring this? Using current output on the back of unit?
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 21, 2017, 01:07:59 pm
I measured it on the back of the unit and as described in the BK precision application note https://bkpmedia.s3.amazonaws.com/downloads/guides/en-us/dc_electronic_load_application_note.pdf (https://bkpmedia.s3.amazonaws.com/downloads/guides/en-us/dc_electronic_load_application_note.pdf)

(which is similar to this video)
https://www.youtube.com/watch?v=jmvf8uRJd8A (https://www.youtube.com/watch?v=jmvf8uRJd8A)

Is there a know bandwidth-limitation on the back of the unit?

Assuming that the BK Precision devices are built electronically similar or equal to the Maynuo the same parameters will apply. BK says itself that the slewrate the devices are rated at are measured for a change from zero to full load. If there is a smaller change the slew-rates are "significant lower".

The BK8500 seems to be the equivalent to the Maynuo M9812 - according to the BK documentation it is rated at 0,5 A/microsecond - even worse than what i measured with the Maynuo.
( Page 20 of https://bkpmedia.s3.amazonaws.com/downloads/manuals/en-us/85xx_manual.pdf (https://bkpmedia.s3.amazonaws.com/downloads/manuals/en-us/85xx_manual.pdf) )

The BK8600 range has user selectable slew-rates, so it is not comparable to the Maynuo.
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on September 21, 2017, 02:30:16 pm
I just checked with mine M9812..

Fastest rise time I achieved was 5 µsecs risetime. Funny thing is that you specify rise time, regardless how much current the jump is...

So I did 5 usec with 15A (3 A/usec), 10A (2 A/usec) and also  15 usec with 0,1A (0,006 A/usec).

So specification is true.. Analog part is obviously capable of sinking large currents fast..
But it cannot keep same A/sec speed at high and low currents.. On low currents it keeps same rise time.

Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on September 21, 2017, 11:23:08 pm
Just received my 3021A and am already disappointed after only 30 minutes of use. The first thing I did was load up the latest firmware (v00.01.01.00.09   2017-08-014).

Like Dave already pointed out, not allowing the CR and CP modes for the built-in battery test function is nuts! Have the Rigol engineers never seen a typical battery capacity test curve? Many capacity tests are done using constant resistance - not just constant current.

While doing some basic testing on a 12V/20A supply, I discovered that there appears to be an 8.0V upper voltage protection when using the CR mode in the 15 ohm range - regardless of what resistance is selected. The only way out of that loop is to remove or reduce the load to less than 8V.

I will continue testing the load and let you know what else I find.

Fortunately, the seller offers a 30-day money back guarantee. I realize that this is a relatively new piece of test gear and I really was looking forward to being happy with it, but if these bugs and blatant omissions are not fixed within my 30 days, then I'm afraid this puppy is going back and I'll just go buy one of the proven, less frilly $300 loads.





Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on September 22, 2017, 12:17:45 am
I just checked with mine M9812..

Fastest rise time I achieved was 5 µsecs risetime. Funny thing is that you specify rise time, regardless how much current the jump is...

So I did 5 usec with 15A (3 A/usec), 10A (2 A/usec) and also  15 usec with 0,1A (0,006 A/usec).

So specification is true.. Analog part is obviously capable of sinking large currents fast..
But it cannot keep same A/sec speed at high and low currents.. On low currents it keeps same rise time.

In the meanwhile i made a somewhat better test setup for my M9812. Direct wiring, no cable longer than 15 cm.
I used a measurement shunt with 1 mOhm and one with 100 mOhm. The result was amplified by an HP 400F AC Voltmeter to scale in the range of 0,5 Volt/div to get a low noise result.

What i observed:
there seems to be an capacitor in the path. With the 0,1 Ohm resistor the rise times has been:
~80 microseconds at 0,01A
15 microseconds at 0,1A
10 microseconds at 1A
17 microseconds at 10A
21 microseconds at 15A

And now the values with the 1 mOhm resistor:
~10 microseconds at 0,1A
~2 microseconds at 1A
~2 microseconds at 10A
~3 microseconds at 15A

But: with the 1 mOhm resistor i had a huge overshot to almost twice the current value that was selected. After 10 to 20 microseconds the correct current was reached. Even with a current-selection of 20A it overshots up to 40A.

Another observation was, that the pulse-width is not constant and/or wrong.
My setup has been:
LevelA: 0
WidthA: 100ms
Rising: 0
LevelB: 1A
WidthB: 0.1ms <or 5ms>

with a width setting of 5ms i get a pulse-width of 6.1 ms in triggered pulse mode. In continuos mode i get 4.98ms.
with a width setting of 0.1ms i get a triggered pulse width of 1,2ms. in continuos mode it is at 0,96ms.

when i cange LevelB to 0.1A i can observe that the pulse length in continuos mode is fluctuating. With a widthB setting of 0.1ms the pulse length fluctuates between 0.02ms and 0.92ms. :(
A slight fluctuation is also visible at 1A - between 0.87 an 0.97 ms.

MotoDan: the battery-test in the Mayuno does also just CC. :( (or did i oversee some setting?)
Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on September 22, 2017, 03:42:37 pm
schopi68, re the absence of CR mode in the new Rigol loads, why not add a very useful and common battery test? These are full featured (and price) units and offer may options over the baseline loads. I think it was just an oversight on Rigol's part. Hopefully it will be added soon.
Title: Re: New Rigol DC Load DL3000 Series
Post by: SparkyM8 on September 22, 2017, 10:45:28 pm
Anyone else notice the metering shunt value is only R0005 or 0.5mohm.
So 1mA resolution corresponds to 500nV. That doesn't sound too sensible to me.
By comparison, the 30A Maynuo uses a 16mohm shunt from 2 lengths of 2.5mm diam. Manganin wire positioned where the fan will keep it cool at higher currents.
Wouldn't be at all surprised if the DL3000 suffers from noise and accuracy issues at low currents.
Title: Re: New Rigol DC Load DL3000 Series
Post by: k4rlhp on September 25, 2017, 01:04:05 pm
then I'm afraid this puppy is going back and I'll just go buy one of the proven, less frilly $300 loads.

Hey there!

Which one specifically did you have in mind? For around 300...400
Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on September 26, 2017, 10:20:52 pm
I'm trying to get my DL 3021A back to a firmware version earlier than the current 00.01.01.00.09 which I believe might be 00.01.01.00.03. Does anyone happen to have the GEL file for this version? I'm hoping it might not have the 8V OVP limit bug that shows up when selecting the 15 ohm range while in CR mode.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on September 27, 2017, 06:56:40 am
I'm trying to get my DL 3021A back to a firmware version earlier than the current 00.01.01.00.09 which I believe might be 00.01.01.00.03. Does anyone happen to have the GEL file for this version?
I think I have one with .04 somewhere in the number. I will have a look for it later today.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on September 27, 2017, 02:48:27 pm
Found it. It is version 00.01.00.04.10, but the filename is missing a .00. It is still available at Rigol, even though the link to it may be gone. Grab it here:
http://int.rigol.com/File/ModelSoftWare/20170604/DL3000%20Firmware_00.01.04.10.rar (http://int.rigol.com/File/ModelSoftWare/20170604/DL3000%20Firmware_00.01.04.10.rar)
Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on September 27, 2017, 04:58:49 pm
Thanks for the link Svuppe. Unfortunately that firmware also has the same 8V OVP issue. Wonder if anyone else has experienced this problem?
Title: Re: New Rigol DC Load DL3000 Series
Post by: TurboTom on October 07, 2017, 01:51:19 pm
Got my hands on a DL3021 yesterday and was able to compare it to my Maynuo 9712. Initially I started experimenting just with a multimeter in diode test mode at its terminals. Immediately I found some severe shortcomings that shouldn´t happen to an experienced test equipment manufacturer, especially since already two firmware updates had been released:

In constant current mode, the output wouldn't switch off if you select it to via the on/off button, as long as the input current is approx. less than 5mA. A further investigations shows that this relates to zero current being displayed on the DL3021´s panel to be flowing in the external circuit. In this case, the instrument wouldn't switch off the passbank transistors. Since the instrument´s current measurement deadband is considerable at 3...5mA, you may end up connecting the device in "off load" mode to a circuit while the passbank is at a dead short. So far, i didn´t check how much current will flow upon connecting a powerful source and how long it will take the instrument to open the passbank and if it makes any difference, regarding the round about 4µF of capacitance across the DL3021´s input terminals that need to be charged. But anyway, I think this bug is an absolute no-go, off means off, regardless of the amount of external current flowing. I guess this can probably be addressed by a firmware update. Accuracy-wise in the low current ranges, the Maynuo wins against the Rigol hands-down. I wonder who came up with that brilliant idea to use a 500µOhms shunt resistor on that instrument...

Yet, as long as "macroscopic" currents are flowing, the load appears to work as it should (as far as I can tell).

Edit: What I really like about the load is the user interface (excluded the catastrophic front panel design). Configuring dynamic patterns is a no-brainer due to the elaborate graphic templates. Also, the current/voltage graph is a nice gimmick, yet I would have liked both current and voltage graph displayed contemporary in different colours on the same screen. Actually, that might be added in future via firmware update. Also, the choice to trigger the graph display properly would be a big plus (either by voltage or current)

What I don´t understand at all is that Rigol doesn´t appear to offer the user to chose which parameter (s)he wants to vary in [con]tinuous mode: As far as I cunderstood (I hope I´m wrong...), only current can be varied, neither voltage, resistance or power? Bummer! Rigol, I'm expecting a substantial firmware update. Along with the add-ons in battery test mode requested by contributors before.

In its current condition, I wouldn´t recommend to purchase the DL30XX. It´s got potential, no doubt, but this requires still a lot of initiative by Rigol, preferably in close contact with first-hour users of the instrument. If Rigol gets all these issues sorted, the DL30XX can turn into the "killer-load" and dominate the main stream market in this power class. But it´s still a considerable way to go I would say.


Cheers,
Tom
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on October 09, 2017, 10:40:02 am
Hi Tom,

could you do some dynamic measurements to compare it with the Maynuo (as in the pictures shown in the post below)?
https://www.eevblog.com/forum/blog/eevblog-1023-rigol-dl3021-electronic-load-teardown/msg1316074/#msg1316074 (https://www.eevblog.com/forum/blog/eevblog-1023-rigol-dl3021-electronic-load-teardown/msg1316074/#msg1316074)
Title: Re: New Rigol DC Load DL3000 Series
Post by: TurboTom on October 09, 2017, 07:36:34 pm
I´ll do my best but unfortunately that won´t happen before next weekend when I´ll again have access to the load.

Cheers,
Tom
Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on October 10, 2017, 07:05:23 pm
TurboTom,

I also have a new DL3021A load and am very disappointed with it. This is the higher priced unit which has the high resolution option as well as a color display. As you stated, if you are using it in a simple constant current mode at relatively high currents it seems to work OK. It has an issue with the constant resistance mode where it will throw up an over voltage protection fault when trying to select the 15 ohm range with a DC load over 8.0 VDC. The resolution is terrible (erratic) for the lower level loads. The unit will also not apply a load of less than about 4ma. I'm still waiting for a firmware fix for the OVP problem, but am probably going to have to return the unit as it is just not able to meet my initial (and basic) needs in its current state. I agree that the DL3000 series loads have the potential to be a really great piece of gear, however my guess is that it will take more than some code changes to get there. Might want to wait for the "B" models!
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on October 10, 2017, 07:06:59 pm
Now I'm really glad I didnt buy it.

I will probably go for the Maynuo M9710.
Title: Re: New Rigol DC Load DL3000 Series
Post by: tzanetos on October 12, 2017, 04:10:14 am
Rigol has released a new firmware update.

https://www.rigolna.com/products/dc-power-loads/dl3000/ (https://www.rigolna.com/products/dc-power-loads/dl3000/)
[Updated Contents]
v00.01.01.00.09   2017-08-014
     - Optimize the waveform adjustment mode for Roll and Fast modes
     - Optimize Roll and Fast mode screenshots to support saved CSV format files
     - Roll mode to supports the waveform playback function
     - Roll mode to supports the waveform record function
     - Fast mode supports the selection of voltage and current curves
     - Support CC+CV function
     - Battery mode support W.H units
     - List mode show the results of the last loop after the run completes 
     - List mode support the recording and playback function ( Thumb drive), save the measurement results of each cycle, save the file format to CSV
     - The SCPI command increases the waveform mode adjustment and the readback command of the waveform data

It seems the two big problems are still:
1) The hot regulator/heatsink
2) The noisy loading which wasn't addressed by Dave, but shown by one of the forum members.

Are there any comparable programmable loads on the market in the same price range?
Title: Re: New Rigol DC Load DL3000 Series
Post by: schopi68 on October 12, 2017, 08:23:40 am
Oh... thats interesting to see. On their website Rigol claims "Calibration Certificate included". The load i got one month ago had been shipped without a calibration certificate.
Title: Re: New Rigol DC Load DL3000 Series
Post by: simone.pignatti on October 13, 2017, 10:46:12 am
Hello, sorry if I couldn't post before but I was on a biz trip
We have checked the units in our stock and here is what is included. It seems the certificates are inside.
Title: Re: New Rigol DC Load DL3000 Series
Post by: MotoDan on October 18, 2017, 05:15:15 pm
Had to give up on Rigol trying to address the problems with the DL3021A within my 30 day return period. Time to move on to a DC load that is ready for use. Maybe the DL3000 series loads will be better with some future code and hardware changes that address the unit's shortcomings.
Title: Re: New Rigol DC Load DL3000 Series
Post by: TurboTom on October 18, 2017, 09:23:50 pm
...did some more testing of the DL3021 last weekend and as MotoDan reported, the instrument should probably have undergone some more testing at Rigol´s labs before being released to the public.

Here´s the setup I used:
(http://www.turbinemuseum.de/files/DL3021/Setup.jpg)

Basically I stacked a lot of Rigol gear on the bench (Power supply @ 20V / 10.5A, Oscilloscope, MOSFET switch, function generator to provide a square wave gate drive to the MOSFET @ 2kHz) and added my Maynuo load as a "spacer" to compensate for my venerable Tek P6042 current probe.

The current probe is connected to trace 2 (the cyan one) of the scope while trace 1 (yellow) displays voltage at the load terminals or across the MOSFET (as shown in the video further down).

I started testing the load at low currents and especially kept an eye on manual on/off behavior and automatic toggling. Here´s what I found:

(http://www.turbinemuseum.de/files/DL3021/CC_100mA_man_on1.png)

Manual on @ 100mA - a lot of "bouncing" and quite high initial current @ almost 1.4A. See below with a different time base.

(http://www.turbinemuseum.de/files/DL3021/CC_100mA_man_on2.png)

Once the average current has stabilized, there´s a residual oscillatioin of 50mApp @ 4.7kHz:

(http://www.turbinemuseum.de/files/DL3021/CC_100mA_osc1.png)

If the load is toggling the current internally, the overshoot gets  a little better but the oscillation is still there. Once again CC 100mA , first toggle frequency 100Hz and directly below 1kHz:

(http://www.turbinemuseum.de/files/DL3021/CC_100mA_tog_100Hz1.png)

(http://www.turbinemuseum.de/files/DL3021/CC_100mA_tog_1kHz1.png)

After this, I checked the performance of the constant voltage mode (CV), adjusted the load to 10V and the PSU to 12v and connected an 18Ohms resistor in between (like a classic zener diode circuit). The speed the DL3021 needed to settle is more than disappointing. It appears the load is emulation this mode with the passbank still in current mode while the digital circuitry slowly adjusts the current to provide the proper voltage drop. It takes round about 2.5 seconds for the voltage to finally settle. Unfortunately i forgot to cross-check this with the Maynuo load:

(http://www.turbinemuseum.de/files/DL3021/CV_10V_18Rser_man_on1.png)

After that some more constant current testing at higher settings was due. 10A CC manual on:

(http://www.turbinemuseum.de/files/DL3021/CC_10A_man_on1.png)

The small spikes that start approx. 5ms before the current rises indicate the instance I pressed the "Load On" button. Rigol, WHY??!  ::)

Now I tested some fast internal toggling @ 10A, frequencies in sequence 1kHz, 5kHz and 10kHz:

(http://www.turbinemuseum.de/files/DL3021/CC_10A_tog_1kHz1.png)

(http://www.turbinemuseum.de/files/DL3021/CC_10A_tog_5kHz1.png)

(http://www.turbinemuseum.de/files/DL3021/CC_10A_tog_10kHz1.png)

The optimist´s comment would be "at 1kHz it looks half-way okay..."  ;)

Rising and falling edges @ 10A and 100Hz internal toggling:

(http://www.turbinemuseum.de/files/DL3021/CC_10A_rise_1kHz1.png)

(http://www.turbinemuseum.de/files/DL3021/CC_10A_fall_1kHz1.png)


After that, I started what I expected to get ugly: Switching the current to the load externally with the MOSFET. Since the source of the MOSFET had to be ground-referenced via the square wave generator, I couldn´t probe the voltage across the load anymore (actually I could have by wiring the load at the FET´s source and probing at its negative terminal and inverting the channel on the scope but I didn´t consider this at the time...was somewhat in a hurry) so the voltage across the MOSFET is displayed. Setting was 1A CC, low frequency (about 10Hz) recorded at two different time bases

(http://www.turbinemuseum.de/files/DL3021/CC_1A_ext_on1.png)

(http://www.turbinemuseum.de/files/DL3021/CC_1A_ext_on2.png)

I guess the inrush current is much higher than the 23A displayed here due to saturation effects of the TEK current probe.
BTW, the Maynuo load doesn´t perform much better in this test (no screenshots available).

Things don´t change at higher frequencies, here 1A CC, 1kHz externally switched:

(http://www.turbinemuseum.de/files/DL3021/CC_1A_ext_tog_1kHz1.png)

At higher currents the load appears to perform slightly better, here 10A at 2kHz are shown. But still no stellar performance.

(http://www.turbinemuseum.de/files/DL3021/CC_10A_ext_tog_2kHz1.png)


Finally, I left the load running in CC mode, externally switched by the MOSFET and continuously varied the current setting. Now some very strange things happened, see here:

http://www.turbinemuseum.de/files/DL3021/DL3021-Test1.mp4 (http://www.turbinemuseum.de/files/DL3021/DL3021-Test1.mp4)

It seems the DL3021 (can´t tell for the other versions but I assume they perform likewise) is designed for rather high power applications and somewhat fails at the low settings. It appears only the constant current mode is implemented in hardware and CV (didn´t test for CR and CP modes yet) is a software-controlled function that shows a very slow reaction to input changes. This also explains why Rigol only implemented the internal sequencing/toggling functions for CC mode. If this is true, I doubt that a firmware upgrade could change this. Considering all these shortcomings, a return-option in case of a purchase should be well considered unless the owner relly needs the load only for rather slow high-power testing.

Cheers,
Thomas



Title: Re: New Rigol DC Load DL3000 Series
Post by: TurboTom on October 20, 2017, 11:32:22 pm
Sorry for the direct follow-up, but I just had to do some more testing of the load and unfortunately - though not unexpected - things get even worse:

I had a closer look at the dynamic behavior of CV, CP and CR modes. This time I also did some more measurements on my Maynuo M9712 load for comparison. My setup is basically the same that I used in my previous contribution, I only wired the voltage probe so it displays the voltage across the load this time.

So let´s start with the Maynuo which more or less performs as expected:
Here's the CV mode at 50Hz external switching frequency, 18R series resistance with the power supply:

(http://www.turbinemuseum.de/files/DL3021/MAY_CV_10V_18R1.png)

And the same thing at a different timebase setting:

(http://www.turbinemuseum.de/files/DL3021/MAY_CV_10V_18R2.png)

The voltage settles at somewhere between 2.5ms and 4ms. Not particularly fast but that´s probably what one could expect from an "el-cheapo" electronic load. Usable at least...

I then changed the load to constant power mode (CP) at 10W, 50Hz, once again two different timebase settings:

(http://www.turbinemuseum.de/files/DL3021/MAY_CP_10W_50Hz1.png)

(http://www.turbinemuseum.de/files/DL3021/MAY_CP_10W_50Hz2.png)

The behavior is not perfect, it takes the load some 350µs to recognize that there´s a voltage present and to cut down the current/raise the resistance of the passbank but then it settles pretty quickly at the expected figures. Once again, no real reason to complain considering the price.

Finally the last test with the Maynuo in CR mode, 20Ohms selected and once again externally cycled at 50Hz:

(http://www.turbinemuseum.de/files/DL3021/MAY_CR_20R_50Hz1.png)

(http://www.turbinemuseum.de/files/DL3021/MAY_CR_20R_50Hz2.png)

What else can I wish for - the proper current is flowing 600µs after the external voltage has been applied. Virtually no droop or whatever can be observed. Well done, Maynuo!


After these tests, the DL3021 was due, and what should I say -- in some cases, I cannot even interpret my findings. In general it seems that Rigol ATTEMPTED some "adaptive" parameter matching but I would say there´s still a considerable distance of road for Rigol to travel in order to come up with a useful result. I tried to duplicate the tests I did with the Maynuo M9712 load before but it turned out that in most cases, the frequency setting of the externally applied power that I used for the Maynuo was just too much for the DL3021. So here we go, first test CV mode @ 10V, 18Ohms in series, 1Hz at two timebase settings:

(http://www.turbinemuseum.de/files/DL3021/CV_10V_18R_1Hz1.png)

(http://www.turbinemuseum.de/files/DL3021/CV_10V_18R_1Hz2.png)

The load needs some 200ms to settle within 5% of the selected voltage. It´s quite curious that the slope doesn´t seem to be an expenential decay but it rather seems to take much longer in the end to actually reach the preset voltage level. The 1Hz period of the externally applied signal doesn´t suffice to achieve that.

During the next test, things turned out really awkward -- in CP mode (10W), I found the load not to reach any steady condition if I toggled the external supply with 50Hz:

(http://www.turbinemuseum.de/files/DL3021/CP_10W_50Hz1.png)

The load kept on modulating the power drawn at a slow pace. It seems the internal "optimization" routine was completely overtaxed. But things turned out even worse in the consequent test: I changed the external toggle frequency to 1Hz in order to permit more time to for the load to catch up -- which may not have been a good idea: After several seconds of operation in a rather unstable manner, the load shut itself down with an error message similar to "Overcurrent detected, input shut down" or the like (don´t remeber the phrase exactly). At least here´s a screen shot of the things going on:

(http://www.turbinemuseum.de/files/DL3021/CP_10W_1Hz_fail.png)

Hint: Don´t take the current displayed before shutdown to be correct -- it´s well possible that my current probe was satuated by the current drawn by the load that was much higher than that. This may also correlate with the warning message on the screen of the load.
Finally, here´s an enlarged sceen shot at the load´s input. Why did it change the current to 1.6Amps after it adjusted to the proper current (0.5A) initially?

(http://www.turbinemuseum.de/files/DL3021/CP_10W_1Hz2.png)

And here we are with Rigol´s CR mode, crap as well... (sorry, tried to stay neutral but getting disappointed more an more...  :-[). Load adjusted to 20 Ohms and externally toggled at 1Hz. Funny thing is the current "approximates" to (almost) the final value of 1A over several periods (something like 25...50) and then suddenly settles at the proper value and stays there (as far as I can tell) as long as the load isn´t switched off:

(http://www.turbinemuseum.de/files/DL3021/CR_20R_1Hz1.png)

Funny thing, at 50Hz toggle frequency this won´t work -- the modulation continues until I was tired to wait any more:

(http://www.turbinemuseum.de/files/DL3021/CR_20R_50Hz1.png)

And the final test  @ 10Hz showed the settling again, yet with considerable overshoot in between. It also took the load a considerable time to reach that "steady-state" that´s visible at the right of the screenshot:

(http://www.turbinemuseum.de/files/DL3021/CR_20R_10Hz1.png)

If you now ask me about my opinion regarding this instrument, I'ld put it like that:
If Rigol was a car manufacturer that´s only half-way respecting themselves, they should call back ALL of their DL3021 (probably all of the DL3000 series) loads sold so far and refund their customers in full, regardless of their distributor´s offerings. This product isn´t up to meet the market yet. If Rigol doesn´t act like that, flush them down the drain. They have got quite some acceptable equipment but this load is not ripe to be supplied to the public. It´s a shame to have their customers doing the job their "alpha-testing department" should have done. I sincerely hope someone who´s got some authority at Rigol reads these lines and provokes corrective actions. I´m almost certain that the shortcomings of the load cannot be all corrected by a software update but rather need a revised hardware.

I defintely recommend not to spend the money on that load - the internal features don´t differ too much from the aesthetics of the front panel -- unfortunately!

Cheers,
Thomas
Title: Re: New Rigol DC Load DL3000 Series
Post by: nugglix on October 21, 2017, 08:16:32 am
Thanks for the testing done.
Saved me some money.  :phew:
So going to look at the Maynuo...
Title: Re: New Rigol DC Load DL3000 Series
Post by: TurboTom on October 21, 2017, 05:30:38 pm
It seems Rigol is taking their new company slogan "Innovation or nothing" for real -- this time it was the latter  ;)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Rbastler on October 21, 2017, 05:40:01 pm
Glad I went for the Maynuo  :phew:
Title: Re: New Rigol DC Load DL3000 Series
Post by: bitseeker on October 21, 2017, 07:47:34 pm
Thanks for all the tests, Thomas. Great job. :-+

This bit at the end pretty much sums it up: "the internal features don't differ too much from the aesthetics of the front panel."
Title: Re: New Rigol DC Load DL3000 Series
Post by: purpose on November 06, 2017, 02:26:26 pm
I just found that I could wind my 3021 up to a 350W load... I would have thought it might have kicked me off way before then.
I feel a population of the extra gizmos creep over me.
Title: Re: New Rigol DC Load DL3000 Series
Post by: MTNELECTRONICS on November 07, 2017, 12:10:40 am
I just found that I could wind my 3021 up to a 350W load... I would have thought it might have kicked me off way before then.
I feel a population of the extra gizmos creep over me.

Interesting...how long until it blows?     :palm:

I noticed that on Dave's video you could see that on the 3021 it was allowing him to set the upper current limit to 60A.  Can yours do that and actually turn on?   
Title: Re: New Rigol DC Load DL3000 Series
Post by: purpose on November 07, 2017, 06:42:54 am
Twas only a very brief excursion, but only pulling seven and a half amps, or so.
Current limit can be set to 70A on mine, but can only be set to draw 41.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Ice-Tea on November 09, 2017, 07:45:52 pm
If anyone is interested: I have a Chroma load (6304 + 2 x 63006), would make a nice vid or post to compare the two. So, anyone that is reasonably close and wants to play around with the Chroma or wants to send in their Rigol for a week or two: ping me!
Title: Re: New Rigol DC Load DL3000 Series
Post by: apoorv3in on February 15, 2018, 12:04:07 pm
Have you tested with new firmware v00.01.02.00.02 2018-1-22

Do you see any improvements.


[Updated Contents]
v00.01.02.00.02 2018-1-22
     - Modified the problems arising from load sinking while being powered on in CR and CP modes.
     - Optimized the overshoot value in CR mode.
     - Modified the record data: originally, the number of the waveform points less than 400 was recorded as 1000, now it is modified to be recorded as Null.
     - Added the Von function in the CR mode and supported Von Latch.
     - Added the cut-off function in the battery discharge mode
     - Added the SCPI commands for the Sense function.
     - Modified the Record function in data recording, capable of recording the four parameters (V, I, R, and P) simultaneously.
     - Modified the List function in data recording, capable of recording the two parameters (V and I) simultaneously.
     - Modified the List operating status error in the SCPI command.


v00.01.01.00.09   2017-08-014
     - Optimize the waveform adjustment mode for Roll and Fast modes
     - Optimize Roll and Fast mode screenshots to support saved CSV format files
     - Roll mode to supports the waveform playback function
     - Roll mode to supports the waveform record function
     - Fast mode supports the selection of voltage and current curves
     - Support CC+CV function
     - Battery mode support W.H units
     - List mode show the results of the last loop after the run completes 
     - List mode support the recording and playback function ( Thumb drive), save the measurement results of each cycle, save the file format to CSV
     - The SCPI command increases the waveform mode adjustment and the readback command of the waveform data


v00.01.00.04.10   2017-04-24

     - Released the first version officially

Title: Re: New Rigol DC Load DL3000 Series
Post by: smithnerd on February 15, 2018, 02:36:41 pm
For those wondering, this seems to only be available from the Chinese version of the Rigol firmware page:

http://www.rigol.com/Support/SoftDownload/3 (http://www.rigol.com/Support/SoftDownload/3)

(replacing hostname 'int' with 'www' - the navigation layout is the same, more or less).

Have you tested with new firmware v00.01.02.00.02 2018-1-22

Title: Re: New Rigol DC Load DL3000 Series
Post by: Howardlong on March 06, 2018, 10:05:51 pm
I blew up my Maynuo M9711 a few days ago, accidentally slapping -15V at 1A from a four quadrant power supply I've been working on was enough to do that: nothing obviously wrong inside, but I don't have the time right now to debug it. Note to self, place a high current schottky across the load's terminals.

So as a replacement, I just received a DL3021A from MCS Test who are currently offering 10% off items in stock over £400. Next day UK shipping was free. (https://www.rigolonline.co.uk/collections/dc-power-supplies/products/rigol-dl3021a-programmable-dc-electronic-load (https://www.rigolonline.co.uk/collections/dc-power-supplies/products/rigol-dl3021a-programmable-dc-electronic-load)). I won't deny it, the 10% off did push me to the DL3021A, I was going to get the DL3021 and purchase the hires option separately. I don't need 40A, I rarely go above 1 or 2A for my testing!

Anyway, after updating the firmware and having a couple of hours with it I fully concur with TurboTom's post here:

https://www.eevblog.com/forum/testgear/new-rigol-dc-load-d3000-series/msg1318288/#msg1318288 (https://www.eevblog.com/forum/testgear/new-rigol-dc-load-d3000-series/msg1318288/#msg1318288)

A lot of my work is at the milliamp range, and the current offset, which drifts over time, varies on my example from about 6.5mA to 9mA. The Maynuo also had current accuracy problems at the low end, but not to quite this extent, frustratingly this was a key reason to try a different model: a case of out of the frying pan, into the fire. There are also plenty of software niggles, for example I was trying to a simple 1A on/off cycle but there was a residual 32mA when the load was meant to be off, certainly a software feature. So I guess it's back to a Mosfet and signal generator for this test.

The Maynuo I had only had TTL remote control, so I built myself an FTDI converter, which was OK, but frankly I felt a bit cheapskated that they'd put a DB9 on the back, but only offered TTL levels.

As TurboTom suggests, the UI is far easier to navigate compared to the Maynuo. Having sense connections at the front is also a big plus.

One further thing I hated about the Maynuo on my example was the rotary encoder that was all over the place, it skipped, advanced and decremented, but not necessarily the way you wanted it to, hardly the best for an electronic load. The DL3021A is much better in this regard.

Thing is, the 0.1uA resolution is rendered useless due to the drift and offset. In the short term, once you've negated the offset, the linearity is about 1% between 20mA and 120mA displayed (12.7mA to 113.5mA actual). As the offset drifts, I'd doubt it's fixable in software. The voltage readout is reasonably accurate, 0.3mV off at 5V at 100mA, with or without the external 4 wire measurement (checked with a calibrated HP 34401A).

All in all rather frustrated by the offset, drift and software bugs, but the UI is certainly a significant improvement over the Maynuo.
Title: Re: New Rigol DC Load DL3000 Series
Post by: apoorv3in on March 13, 2018, 02:15:01 am
My rigol dl3021 keeps crashing in CR mode. The load will stop randomly after which i have to toggle the output again. This issue is more persistant with the rate of input switching. I have installed the latest firmware.
Title: Re: New Rigol DC Load DL3000 Series
Post by: sstepane on March 13, 2018, 09:44:13 am
Hi,

I'm too having some problems with CR mode. Tried support - no luck, they just remain silent and after some time simply close the case. So there is no Rigol support whatsoever. Quite angry -  :wtf: is it hard to reply? Not going to buy any other Rigol equipment.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Synthtech on March 13, 2018, 10:09:52 am
After looking at the comprehensive oscilloscope screen shots above I can see why testing needs to be done to check the transient response of the load during power-up of the load unit and during application of the input current to the load. One question that comes to mind for me is that the Rigol and Maynuo units are sold as DC electronic loads. Isn’t it outside the spec of the units to be applying square waves pulse trains to the inputs?
Title: Re: New Rigol DC Load DL3000 Series
Post by: 2N3055 on March 13, 2018, 10:19:41 am
DC load  means it should be used for testing of DC power supplies... And testing can be with static current, voltage, power, or resistance... But one of the tests is PSU behawiour on dynamic, fast changing load. It reveals dynamic response of psu..
Title: Re: New Rigol DC Load DL3000 Series
Post by: bitseeker on March 13, 2018, 07:11:54 pm
DC is the unidirectional flow of electric charge (https://en.wikipedia.org/wiki/Direct_current). Therefore, a square wave (or pulse train) that varies in voltage without changing sign is DC.

Of course, a particular DC load may or may not be able to handle certain forms of DC, which should be defined in its specs.
Title: Re: New Rigol DC Load DL3000 Series
Post by: Worsdier on March 29, 2018, 01:46:04 pm
Firmware v00.01.01.00.09 added Wh measurements to the battery test program, can someone confirm that it's also possible to select a stop value in Wh? In other words, can I enter a Wh value to discharge before stopping the test, similar to what C_Stop does in Ah.
Title: Re: New Rigol DC Load DL3000 Series
Post by: joad on May 20, 2018, 01:10:59 pm
Hi, I can't find a way to enter a stop value in Wh, I'm using firmware v00.01.02.00.02.

Title: Re: New Rigol DC Load DL3000 Series
Post by: Worsdier on May 20, 2018, 01:13:59 pm
Hi, I can't find a way to enter a stop value in Wh, I'm using firmware v00.01.02.00.02.

Thanks, I guess there is no W-Stop function.
Title: Re: New Rigol DC Load DL3000 Series
Post by: MilkmanCDN on June 03, 2018, 02:16:04 am
Although the Maynuo 97/98-series loads are programmable they're not LXI and/or SCPI, it's got no USB or Ethernet port, instead it uses MODBUS RTU over a un-isolated (ie the common for the TX/RX-signals is connected to negative terminal of the input) TTL-level UART-connection for which you generally would want to use their M-131 or M-133 isolated level translator cable - or a similar DIY type of thing.

If you're into automation and have other instruments speaking SCPI then having to mess around with MODBUS as well may be a disadvantage.

This!   I've been looking everywhere for an e-load with an LXi interface.    So far, I've found three:

- Rigol DL3021A - https://www.rigolna.com/products/dc-power-loads/dl3000/ (https://www.rigolna.com/products/dc-power-loads/dl3000/)
- Kikusui PLZ-5W Series (Very expensive >$5K US) - http://www.kikusui.co.jp/en/product/detail.php?IdFamily=0141 (http://www.kikusui.co.jp/en/product/detail.php?IdFamily=0141)
- TTi LD400P (Also expensive >$1.5K US) - https://www.aimtti.com/product-category/electronic-loads/aim-ld400series (https://www.aimtti.com/product-category/electronic-loads/aim-ld400series)

I ordered a Rigol and will pick it up in a few days.    My goal has always been to automate SMPS efficiency measurements as it's something that I often have to do.    Performing these manually, especially at different operating points, is painful.

Title: Re: New Rigol DC Load DL3000 Series
Post by: ornea on November 09, 2018, 01:01:52 am
I seem to be having problems using the  SCPI commands below.

The response I get is command error.

I have tried variations on the command with no joy.  Anyone got one of these hooked up to their network by any chance and can check if the command works.

I have no issues querying Volts, Power, watts etc, just the discharge time.

Title: Re: New Rigol DC Load DL3000 Series
Post by: ornea on November 11, 2018, 03:32:54 am
The solution turns out to be :MEAS:DISCT if any one else is having issues with :MEASure:DISChargingTime?

Now if I could just get *RST to work.

Thing also locks up regularly.  Not the most stable piece of test equipment.
Title: Re: New Rigol DC Load DL3000 Series
Post by: bitseeker on November 11, 2018, 04:13:43 am
With SCPI commands, the capitalized letters in a command keyword indicate the abbreviated form of the command (i.e., by omitting the lowercase ones). Hence, MEASure:DISChargingTime is the same as  MEAS:DISCT. The capitalization is only for documentation purposes. Sending MEAS:DISCT is the same as Meas:discT or meas:disct (if it's implemented correctly, of course).

Having a required (capitalized) letter in the middle of a command keyword is rather odd and I would consider it very poor form (if not down right incorrect). It's not surprising that it causes confusion. It's as if someone at Rigol got a bit confused between the SCPI naming convention for command keywords and that of variables in a programming language such as C++, Java, etcetera, when coming up with their command set.
Title: Re: New Rigol DC Load DL3000 Series
Post by: maxspb69 on April 25, 2019, 05:53:46 pm
Does the new firmware v00.01.04.00.05 fix the problems described above at least partially? Has anyone tested?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on April 26, 2019, 08:06:34 am
Does the new firmware v00.01.04.00.05 fix the problems described above at least partially? Has anyone tested?
Where can this new version be found? I haven't been able to locate it anywhere.
Title: Re: New Rigol DC Load DL3000 Series
Post by: maxspb69 on April 26, 2019, 03:10:42 pm
https://www.rigolna.com/products/dc-power-loads/dl3000/ (https://www.rigolna.com/products/dc-power-loads/dl3000/)
Title: Re: New Rigol DC Load DL3000 Series
Post by: max-bit on April 30, 2019, 08:16:57 am
Does anyone know about the existence of "software" for hack options in Dummy Load DLxxxx?
Title: Re: New Rigol DC Load DL3000 Series
Post by: maukka on April 30, 2019, 08:18:35 am
The hack for the DP series PSUs (https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2320485/#msg2320485) should work for the loads (https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2328576/#msg2328576) as well.
Title: Re: New Rigol DC Load DL3000 Series
Post by: apoorv3in on May 20, 2019, 05:05:57 am
Rigol DL3021 fully unlocked to DL3021A with color screen
Also DP832 fully hacked to DP832A with color screen

(http://img4.imagetitan.com/img4/R0dpiL6x0DuvAH4/19/19_20190520_002103-01.jpg)

format usb drive to FAT
extract the keyfile.zip to usb drive and run SCPI command

:PROJ:SET MODEL,DL3021A

more details
https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/100/ (https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/100/)
Title: Re: New Rigol DC Load DL3000 Series
Post by: joad on May 25, 2019, 10:05:47 am
Interesting,
I tried this on my DL3021 and it worked as aspected. Thanks to all of u that made this possible.

But is there anyone how knows how to calibrate the DL3000. I fond the calibration procedure for the DP832 her on EEVblog so I'm hoping that someone has the information for the DL3000.

Title: Re: New Rigol DC Load DL3000 Series
Post by: Svuppe on May 25, 2019, 02:54:22 pm
I also tried this on my DL3021, and I failed over and over again.
After much swearing, I tried to reformat my flashdrive with a sector size of 64KB (default was 16KB). And then it worked.
Title: Re: New Rigol DC Load DL3000 Series
Post by: BLF Lexel on May 25, 2019, 03:20:04 pm
I also used another program to do the hack
I have not tested it but with proper USB drivers you can do it without LAN

I used the Rigol Bildschirmkopie Tool to do so, but CMD works as well with telnet
http://peter.dreisiebner.at/rigol-bildschirmkopie/index.htm (http://peter.dreisiebner.at/rigol-bildschirmkopie/index.htm)

I tried Bildschirmkopie only via Network, maybe someone makes it work with USB, but this needs correct IVI drivers to send commands

Step 1
Activate Telnet in your windows features and restart PC
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Telnet.png)

Step 2
connect the function generator to the network
check if connection is good with ping
also a firewall may cause problems even with ping working, the DG1022Z I could only get sent SCPI commands on a very old standalone PC in my basement shop
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_ping.png)

step 3
get a FAT formatted USB stick and write the keyfile.bin in the main directory
https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/?action=dlattach;attach=696567 (https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/?action=dlattach;attach=696567)

Step 4 with Bildschirmkopie

- start it
- ctrl+E to do a search on the network and connect the Rigol device
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_1.png)
- search for devices and choose the one you want to unlock
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_2.png)
- open SCPI commands
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_3.png)
- check device signature
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_4.png)
- send SCPI command with new Model name
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_5.png)
- reboot device and check again device signature
(http://www.metronixlaser.de/bilder/flashlight/Rigol_Hack_Bildschirmkopie_6.png)
Title: Re: New Rigol DC Load DL3000 Series
Post by: Wintel on May 26, 2019, 07:28:56 pm
Can hack the DC Load DL3021 to DL3031A?  Like the DG811 to DG992?
Title: Re: New Rigol DC Load DL3000 Series
Post by: Bibbbi on June 03, 2019, 06:16:47 am
Rigol DL3021, DL3021A, DL3031, DL3031A latest Firmware

Changelog:
Quote
v00.01.04.00.05 2019-03-06
     - Improving the performance of overshort in CC mode
     - Improving the Slew Voltage Drop Perfomance
     - Increase the recording content of battery mode,"mAH"  "wh" "time"
     - Modifyed the bug in slewrate
     - Increased SCPI commands for battery mode
     - Increased SCPI commands for OCP mode
     - Increased SCPI commands for OPP mode

Download: DL3000 Firmware_00.01.04.zip (2.3MB)
Code: [Select]
https://beyondmeasure.rigoltech.com/acton/ct/1579/p-00ac/Bct/-/-/ct50_0/1?sid=TV2%3AQ2jKaGpUj
Title: Re: New Rigol DC Load DL3000 Series
Post by: shodan@micron on June 03, 2019, 10:20:28 am
I try hack DL3021 with FW 00.01.02 to DL3021A on instruction https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2437830/#msg2437830 (https://www.eevblog.com/forum/testgear/need-help-hacking-dp832-for-multicolour-option/msg2437830/#msg2437830)
With fat32 flash and 64K sector.
I use USB cable + RigolBildschirmkopie software to send SCPI magic command.
All works fine.

After that i upgrade FW to 00.01.04, and also works fine!

Title: Re: New Rigol DC Load DL3000 Series
Post by: drummerdimitri on September 04, 2019, 10:21:23 pm
Does anyone know if Rigol added the possibility of pulling energy from the battery app other than in CC mode for the DL3031A?
Title: Re: New Rigol DC Load DL3000 Series
Post by: MrFox on September 08, 2019, 08:45:59 pm
Does anyone know if Rigol added the possibility of pulling energy from the battery app other than in CC mode for the DL3031A?
They didn't in the latest firmware.

I wouldn't expect it. They do solve the bugs over time, but rarely add features.
Title: Re: New Rigol DC Load DL3000 Series
Post by: MrFox on September 08, 2019, 08:49:15 pm
Is there a way to do a manual calibration like the DP800 ?
I haven't found anything in the menu or the manual.
Title: Re: New Rigol DC Load DL3000 Series
Post by: maxspb69 on September 13, 2019, 08:45:41 am
Use info from this file:
https://www.eevblog.com/forum/testgear/lists-of-rigol-scpi-commands/?action=dlattach;attach=754317 (https://www.eevblog.com/forum/testgear/lists-of-rigol-scpi-commands/?action=dlattach;attach=754317)
Try calibrate it by SCPI commands.
Title: Re: New Rigol DC Load DL3000 Series
Post by: tv84 on September 26, 2019, 08:46:56 pm
Just for the record:

Rigol DL3000 option licenses are different from all previous Rigol equipments. They don't use ECC and use only a cascade of CRC-16s.

When you change the models to the "-A" versions, all the 7 options get officially activated and no license is needed.

Rigol DL3000 S/N: DL3A123456789

                     Official License          Trial License (2160 min)
DL3-LAN        LZKG2RLWYL7N4XVTTDUKK83R9TZT  L34EWCRF9L7NDUNUFSSE7HAW7QPZ 
DL3-DIGITAL-IO UUQU62UJEL7NF7QUWRSD82KP74KF  66EZYHPWMK7NDC7YAE3LNBN9YRTJ 
DL3-HIRES      8LXCTCM9HL7N7EDR5GXDD68XVSW7  B32T7R3J8L7NSTGWKFHXHQZLSP4E 
DL3-RIPPLE     MSGWQHXPQK7NEZNW8WU7ZGYT54MR  M5WD32HHKK7NLAQRVQ5ZE8P9TTWK 
DL3-REST       EL7NM66XUL7NRXD9GXZ9V3BLPWZV  VY85FMJTFL7NURJ7YCSTY5NQM4EV 
DL3-SlewRate   E4T9HP54EL7NY2T7ZP5PRSFFXFHS  FUFHZSEDTK7NVCT8QUSDP9SKWV66 
DL3-Freq       KSCLAMYZZK7NTHE2LAD7QL8ZLPMP  UDG7J6P3EL7NBN844ZR73MJ9EL3R



BTW, the FW contains these Model Types:

00 - DL3021     03 - DL3021A
01 - DL3031     04 - DL3031A
02 - DL3051     05 - DL3051A
  <- it seems this line hasn't seen the light of day
Title: Re: New Rigol DC Load DL3000 Series
Post by: idolclub on September 26, 2019, 09:38:06 pm
Just for the record:

Rigol DL3000 option licenses are different from all previous Rigol equipments. They don't use ECC and use only a cascade of CRC-16s.

When you change the models to the "-A" versions, all the 7 options get officially activated and no license is needed.

Rigol DL3000 S/N: DL3A123456789

                     Official License          Trial License (2160 min)
DL3-LAN        LZKG2RLWYL7N4XVTTDUKK83R9TZT  L34EWCRF9L7NDUNUFSSE7HAW7QPZ 
DL3-DIGITAL-IO UUQU62UJEL7NF7QUWRSD82KP74KF  66EZYHPWMK7NDC7YAE3LNBN9YRTJ 
DL3-HIRES      8LXCTCM9HL7N7EDR5GXDD68XVSW7  B32T7R3J8L7NSTGWKFHXHQZLSP4E 
DL3-RIPPLE     MSGWQHXPQK7NEZNW8WU7ZGYT54MR  M5WD32HHKK7NLAQRVQ5ZE8P9TTWK 
DL3-REST       EL7NM66XUL7NRXD9GXZ9V3BLPWZV  VY85FMJTFL7NURJ7YCSTY5NQM4EV 
DL3-SlewRate   E4T9HP54EL7NY2T7ZP5PRSFFXFHS  FUFHZSEDTK7NVCT8QUSDP9SKWV66 
DL3-Freq       KSCLAMYZZK7NTHE2LAD7QL8ZLPMP  UDG7J6P3EL7NBN844ZR73MJ9EL3R



BTW, the FW contains these Model Types:

00 - DL3021     03 - DL3021A
01 - DL3031     04 - DL3031A
02 - DL3051     05 - DL3051A
  <- it seems this line hasn't seen the light of day

Will release new firmware and two new license "DL3-RIPPLE" and "DL3-REST" ?
Title: Re: New Rigol DC Load DL3000 Series
Post by: tv84 on September 28, 2019, 10:05:31 am
Will release new firmware and two new license "DL3-RIPPLE" and "DL3-REST" ?

The current FW already contains these Options:

DL3-LAN             LAN Interface
DL3-DIGITAL-IO      Digital I/O Interface
DL3-HIRES           High Readback Resolution
DL3-RIPPLE          Ripple
DL3-REST            Transient Recovery Time
DL3-SlewRate        High Slew Rate
DL3-Freq            High Frequency


Definitions visible inside the FW:
Ripple: This function is an option. It is measured over a specified bandwidth, with all influence and control quantities maintained constant.
Transient Recovery Time: This function is an option. It refers to the time required for the output voltage of a power supply to return to within a level approximating the normal dc output following a sudden change in load current.