Author Topic: Electronic dc load tester recommendations??  (Read 5066 times)

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Offline wadmancpu

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Electronic dc load tester recommendations??
« on: October 29, 2019, 03:59:00 pm »
Looking for some recommendations on an electronic dc load tester for bench testing power supplies. I don't need a lot of bells and whistles but I want quality at the best price. Any info would be appreciated. Thanks in advance.
 

Offline nctnico

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Re: Electronic dc load tester recommendations??
« Reply #1 on: October 29, 2019, 04:39:41 pm »
Used or new? Used: the Dynaload loads from Transistor Devices offer a lot of bang for your buck.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline Kean

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Re: Electronic dc load tester recommendations??
« Reply #2 on: October 29, 2019, 04:44:12 pm »
Like a lot of test equipment, there is a huge range of options - so you need to narrow your requirements down a bit.
Voltage/Current/Power range?
Programmable or data logging features?
What have you looked at?
 

Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #3 on: October 29, 2019, 06:17:52 pm »
Looking at the Rigol dl3021. 150v, 40a, 200w. More than I'm looking
To pay though. I don't need a programmable one. Those are the right specs for me. If I could find a similar one without being programmable for a lesser price that would be good. Thanks.
 

Offline nctnico

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Re: Electronic dc load tester recommendations??
« Reply #4 on: October 29, 2019, 06:30:45 pm »
The ones from Itech, Array, etc you can buy from Ebay are more affordable and work OK for general purpose DC load testing. Years ago I bought a bunch of Array 3710A loads. Nowadays they have newer models.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline tautech

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Re: Electronic dc load tester recommendations??
« Reply #5 on: October 29, 2019, 07:10:18 pm »
Looking at the Rigol dl3021. 150v, 40a, 200w. More than I'm looking
To pay though. I don't need a programmable one. Those are the right specs for me. If I could find a similar one without being programmable for a lesser price that would be good. Thanks.
Have you seen this one ?
https://www.eevblog.com/forum/testgear/siglent-sdl1000xsdl1000x-e-electronic-load/
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Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #6 on: October 29, 2019, 07:28:12 pm »
I just looked that up and it doesn't appear to be available in the US.
 

Offline tautech

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Re: Electronic dc load tester recommendations??
« Reply #7 on: October 29, 2019, 07:30:34 pm »
I just looked that up and it doesn't appear to be available in the US.
Sure is.
https://siglentna.com/dc-electronic-load/sdl1000x/
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Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #8 on: October 29, 2019, 07:35:56 pm »
I can pickup an Itech it8512a for around $300, open box unit. How does this measure up to the Rigol dl3021? Would I be better off spending the extra $200?
 

Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #9 on: October 29, 2019, 07:37:52 pm »
Nevermind, that's China.
 

Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #10 on: October 29, 2019, 07:40:21 pm »
Looks like about the same price as the Rigol dl3021. $499 on that site.
 

Offline tautech

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Re: Electronic dc load tester recommendations??
« Reply #11 on: October 29, 2019, 08:24:45 pm »
Nevermind, that's China.
Yep and here's the factory website:
https://int.siglent.com/products-overview/sdl1000x/

And hosted in the US...........

Looks like about the same price as the Rigol dl3021. $499 on that site.
That's Chinese too !

You can get a bit off now you're a member by asking for the members discount here:
https://www.eevblog.com/forum/testgear/equipment-discounts-from-saelig/

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Offline MarkF

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Re: Electronic dc load tester recommendations??
« Reply #12 on: October 29, 2019, 08:44:29 pm »
The Siglent is available from Saelig.
   http://www.saelig.com/TSTEQDC/sdl1020x-e.htm
Get their EEVblog discount.

[attachimg=1]

The Rigol:
   http://www.saelig.com/TSTEQDC/dl3021.htm

[attachimg=2]
« Last Edit: October 29, 2019, 08:49:07 pm by MarkF »
 

Offline MarkF

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Re: Electronic dc load tester recommendations??
« Reply #13 on: October 29, 2019, 09:06:20 pm »
A Siglent review:

 

Offline BillB

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Re: Electronic dc load tester recommendations??
« Reply #14 on: October 29, 2019, 09:26:21 pm »
I've got both the ITech 8511+ and the Siglent SDL1020X-E.  If you don't need the bells and whistles, the Itech loads work well and the 150W 8511+ can be had for less than $350 (from China).  The Siglent SDL-1020X-E 200W does add a lot of features and with a discount can probably be had for $450.

The better display and network connectivity are worth the extra $100 to me, but if you aren't going to perform programming or remote automation with the load then the Itech is fine, too.  (The ITech is SCPI programmable, but uses a serial interface)
 

Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #15 on: October 30, 2019, 12:51:00 am »
So is the Siglent a better unit than the Rigol? How do I get the eev blog discount?
 

Offline tautech

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Re: Electronic dc load tester recommendations??
« Reply #16 on: October 30, 2019, 01:07:53 am »
So is the Siglent a better unit than the Rigol? How do I get the eev blog discount?
Ask for it in this thread:
https://www.eevblog.com/forum/testgear/equipment-discounts-from-saelig/
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Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #17 on: October 30, 2019, 01:49:58 am »
So Siglent or Rigol....? I like the larger display the Rigol has. Any thoughts?
 

Offline ahope

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Re: Electronic dc load tester recommendations??
« Reply #18 on: October 30, 2019, 06:08:46 am »
I just got the  Tenma 150wcdc load:
https://uk.farnell.com/tenma/72-13200/dc-electronic-load-prog-30a-120v/dp/2848406

Not as fancy as the Rigol or Siglent, but good quality, nice software, programmable, etc.

It is a rebadged Korad KEL 102

oh, and i almost forgot: It`s half the price of Rigol and Siglent.

The siglent is a nice unit, but too deep to fit on my bench.

« Last Edit: October 30, 2019, 09:43:09 am by ahope »
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Online beanflying

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Re: Electronic dc load tester recommendations??
« Reply #19 on: October 30, 2019, 07:45:51 am »
The question is what do you expect from it with internal Accuracy and options for your $ ? Just how often do you think you will use or NEED it?

I got one of these a while ago https://www.aliexpress.com/item/32822398014.html?spm=a2g0s.9042311.0.0.27424c4dJLpSCd and it is better than expected in use re accuracy but I tend to take measurements for Voltage and Current with better gear I have on hand rtather than rely on the numbers shown.

I also got at the same time the baby version which apart from blowing a FET has worked great too. https://www.aliexpress.com/item/32677950277.html?spm=a2g0s.9042311.0.0.27424c4dJLpSCd

In conjunction to these I also built a fairly precise 10 ohm set of 50W resistors that I can series parallel and use to load to 150+W and 30V if needed. This arrangement cost me well over the 180W Aliexpress option above but I like the idea of simple and passive because I am old  ;)
« Last Edit: October 30, 2019, 07:50:25 am by beanflying »
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Offline wadmancpu

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Offline ahope

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Re: Electronic dc load tester recommendations??
« Reply #21 on: October 30, 2019, 11:10:38 am »
Tenma is a rebadget Korad.

I have had the time to try out my 102 (150 watt version of the 103 which is 300w, otherwise identical), and it works like a charm. I like it a lot, and it actually looks and feel better in real life than on the pictures and marketing materials.
The software is also quite good, although PC only. It's a lot easier to program / configure using the apps rather than via the front panel.
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Offline wadmancpu

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Re: Electronic dc load tester recommendations??
« Reply #22 on: October 30, 2019, 03:09:02 pm »
Thanks for the input. I'm thinking of going this route. The 103 is about $350 and its 300w vs the 200w rigol and siglent. Sounds like good quality. The Rigol and Siglent have some features I dont really need and this 103 seems perfect. Is Tenma/Korad kind os a middle of the road brand as far as quality goes?
 

Offline genghisnico13

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Re: Electronic dc load tester recommendations??
« Reply #23 on: October 30, 2019, 03:29:06 pm »
if you want to add LAN/WIFI capabilities to one of the loads that only has a serial connection you can use Ser2Net running on a Raspberry with a serial USB adapter/RS232 transceiver, I use it on other equipment and it works really well. It was essentially free on my case because I already had a PI running other services in my house.
 

Offline ahope

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Re: Electronic dc load tester recommendations??
« Reply #24 on: October 30, 2019, 07:42:00 pm »
I have done some checking, and for me it seems Korad( or tenma ) is good quality. The focus seems to be on specs and quality, design and looks second.
I also have a Korad power supply, and is happy with that as well.
Embedded, IOT and OS/RTOS.
Designing Audio amps for my pleasure
From bare metal to the cloud
 


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