Author Topic: EEVblog #512 - Rigol DP832 Bad Design Investigation  (Read 255682 times)

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Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #525 on: January 18, 2014, 07:30:50 pm »
Yes same mine upgraded and lost trigger but calibration I think not necessary I done because changed also lm317 now not 5.14v but 5.088v also to try fix ch2 which read 9mV up than real still now if you make calibration make sure wait 3,4 seconds before confirm insert value on adcv and adca calibration
« Last Edit: January 18, 2014, 07:36:27 pm by rsivan »
 

Offline ted572

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #526 on: January 18, 2014, 10:18:55 pm »
Yes same mine upgraded and lost trigger but calibration I think not necessary I done because changed also lm317 now not 5.14v but 5.088v also to try fix ch2 which read 9mV up than real still now if you make calibration make sure wait 3,4 seconds before confirm insert value on adcv and adca calibration
Thanks 'rsivan' for giving me the push I needed to install FW 08.  I was reluctant until now with the horror stories I read from a few, about the issues they had.
 
I also substituted a switching regulator for the LM317.  I used a DSN2596 which is an assembled PCB module that was very inexpensive at $1.44 with free shipping.  When I went looking for a regulator IC to make something up I found this, and it was ready to fit in, so I choose this rout.  If Rigol were to open up my DP832 they would have to think that they had installed it at the factory.  It looks that good.  Although not required, I pulled out the potentiometer and replaced it with two SMT resistors.  I don't recall now what values I used because that was a few months ago and everything worked great with it set at the original voltage I measured before pulling out the LM317.
Available at -> http://www.ebay.com/itm/380755874794?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2648
« Last Edit: January 18, 2014, 10:26:59 pm by ted572 »
 

Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #527 on: January 18, 2014, 11:17:43 pm »
This one also perfect  problem is only time ot get I already have mine assembled if I order this from China here in Italy I got in 20-30 days I don't like to wait better to build on proto board
 

Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #528 on: January 19, 2014, 05:14:49 pm »
I done full calibration now works well very accurate Voltage and Current like 12.000v I read 12.000v with Agilent DMM no reset with switching mod my 5v board keep 35c max, is important you make erase calibration with command via  Ultra Sigma sw no matter if you don't get answer just send command like in calibration guide and after start calibration for each channel my fw is 1.08 lost only Trigger.
In picture an engineer from Rigol testing my work with 34461A :-)
 

Offline nack

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #529 on: January 20, 2014, 12:07:02 am »
Can you supply the calibration guide to us? Or show the location where to download?
 

Offline Sparky

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #530 on: January 20, 2014, 12:30:19 am »
Can you supply the calibration guide to us? Or show the location where to download?

See attachments in this post: https://www.eevblog.com/forum/testgear/rigol-dp832-firmware-updates-and-bug-list/msg361709/#msg361709
 

Offline nack

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #531 on: January 20, 2014, 01:10:04 am »
Great, thanks!
 

Offline ted572

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #532 on: January 20, 2014, 03:37:38 pm »
I done full calibration now works well very accurate Voltage and Current like 12.000v I read 12.000v with Agilent DMM no reset with switching mod my 5v board keep 35c max, is important you make erase calibration with command via  Ultra Sigma sw no matter if you don't get answer just send command like in calibration guide and after start calibration for each channel my fw is 1.08 lost only Trigger.
In picture an engineer from Rigol testing my work with 34461A :-)
Did you use Ultra Sigma 00.01.05.09 (the one we have been using) or 00.01.05.10 (latest version, ~530MB RAR file)?
BTW Ultra Sigma 00.01.05.10 is supplied with the DS1000Z Series Oscilloscope.
Perhaps the commands that haven't worked for the DP832 Calibration will work with the  00.01.05.10 version.
I understand that you have yours done, but perhaps you or someone else could check this out and let us know.

Download Link   ULtra Sigma 00.01.05.10:  www.batronix.com/exe/Rigol/VISA/Ultra%20Sigma(PC)Installer.rar
                          NI VISA Runtime for Ultra Sigma:  www.batronix.com/exe/Rigol/VISA/visa540_runtime.exe
« Last Edit: January 20, 2014, 08:06:05 pm by ted572 »
 

Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #533 on: January 20, 2014, 04:26:28 pm »
checked now what installed on pc I is  00.01.05.10 I take from Rigol website when you have send both command listed on manual you see adc voltage feedback going out of spec and you can procede with manual calibration
 

Offline mcinque

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #534 on: January 20, 2014, 07:29:18 pm »
Rsivan, I appreciate your replies and thank you for sharing your experiences, but for the love of god, use some punctuation!  ;D
« Last Edit: January 20, 2014, 07:31:23 pm by mcinque »
I'm basically still a rookie and because of this, even with the best intentions, I often say bullshits
 

Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #535 on: January 20, 2014, 07:37:18 pm »
Yes sorry I know...
I'm so excitated about this toy and I miss some punctuation
:-)
 

Offline mcinque

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #536 on: January 20, 2014, 08:06:04 pm »
 ;D

me too, but unfortunately I've the REV. 2 board version; I'm still waiting for replacement and I'm not sure about the destiny of my official options installed (wich I've bought toghether with the PSU): will Rigol provide my another set of serial keys!?  :-//. We'll see.
I'm basically still a rookie and because of this, even with the best intentions, I often say bullshits
 

Offline jkw13

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #537 on: January 20, 2014, 11:11:57 pm »
checked now what installed on pc I is  00.01.05.10 I take from Rigol website when you have send both command listed on manual you see adc voltage feedback going out of spec and you can procede with manual calibration

Do you mean the SCPI commands?

:Cal:Start 2012,CH1
:Cal:Clear CH1,ALL

If so, I cannot get those to work.
You mentioned "erase", what exact command did you send
and on which screen please?

Thankyou
« Last Edit: January 21, 2014, 12:46:27 am by jkw13 »
 

Offline rsivan

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #538 on: January 21, 2014, 06:11:50 pm »
checked now what installed on pc I is  00.01.05.10 I take from Rigol website when you have send both command listed on manual you see adc voltage feedback going out of spec and you can procede with manual calibration

Do you mean the SCPI commands?

:Cal:Start 2012,CH1
:Cal:Clear CH1,ALL

If so, I cannot get those to work.
You mentioned "erase", what exact command did you send
and on which screen please?

Thankyou
Yes these are  commands I used,send both in sequence,after start manual calibration.
 
 

Offline jkw13

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #539 on: January 21, 2014, 10:38:33 pm »
Many thanks rsivan.

Calibrates fine now! :-+
« Last Edit: January 21, 2014, 10:40:04 pm by jkw13 »
 

Offline Sparky

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #540 on: January 27, 2014, 09:36:44 pm »
I sent a polite email to "info@rigol.com" last night stating the timeline of my issue and asking for either a fix or at least information on when the fix would be offered.  I received an email back a few hours ago from a gentleman at Rigol who sent an RMA form and a pre-paid return shipping tag.  He mentioned they had been kept waiting for the repair parts, and that it was taking time to work through the backlog of units for repair. 

At least it appears they are now performing the fixes - hopefully the turnaround time won't be too bad.  I have other supplies I can use so I won't miss this one for a couple of weeks, but I hope it doesn't end up taking a couple months.  I don't think it will - they told me they should be able to turn it quick.

So for anyone still waiting, I guess you could either wait for contact knowing they are doing fixes, or you could email info@rigol.com and ask them to ensure you are on the list, at least.

Hope it helps.

Any update on this?  I wonder if you sent your DP832 back for the board replacement?  If so, have you got it back yet?  How has the correspondence been from Rigol NA about the process?

Thanks!
 

Offline Corporate666

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #541 on: January 27, 2014, 11:49:15 pm »
I sent a polite email to "info@rigol.com" last night stating the timeline of my issue and asking for either a fix or at least information on when the fix would be offered.  I received an email back a few hours ago from a gentleman at Rigol who sent an RMA form and a pre-paid return shipping tag.  He mentioned they had been kept waiting for the repair parts, and that it was taking time to work through the backlog of units for repair. 

At least it appears they are now performing the fixes - hopefully the turnaround time won't be too bad.  I have other supplies I can use so I won't miss this one for a couple of weeks, but I hope it doesn't end up taking a couple months.  I don't think it will - they told me they should be able to turn it quick.

So for anyone still waiting, I guess you could either wait for contact knowing they are doing fixes, or you could email info@rigol.com and ask them to ensure you are on the list, at least.

Hope it helps.

Any update on this?  I wonder if you sent your DP832 back for the board replacement?  If so, have you got it back yet?  How has the correspondence been from Rigol NA about the process?

Thanks!

Funny you mention that - I actually haven't sent it back yet, but I plan to this week.  Literally the day I got the shipping tag, a little emergency project fell into my lap using some white COB LED's that take over 30 volts.  I needed my DP832 to run these reliably so I figured I will send it when I am done.  I wrapped it up over the weekend and should get the unit out tomorrow. 
It's not always the most popular person who gets the job done.
 

Offline Sparky

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #542 on: January 28, 2014, 12:10:26 am »
Funny you mention that - I actually haven't sent it back yet, but I plan to this week.  Literally the day I got the shipping tag, a little emergency project fell into my lap using some white COB LED's that take over 30 volts.  I needed my DP832 to run these reliably so I figured I will send it when I am done.  I wrapped it up over the weekend and should get the unit out tomorrow.

Okay, thanks for letting us know!  Hope all goes well, and please update here as the process unfolds :)
 

Offline lemon

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #543 on: January 29, 2014, 08:12:30 am »
We make many threads for Rigol DP832 and I didn't know where to post it...

I had a contact with Rigol via local dealer where I am living, about Top Board Revision vs Thermal Behavior of LM317.

I sent them three photos, one with the first topology of LM317 with the two capacitors and LM to be very closed together (I call this "First Board Revision"), the second with the movement of capacitors and LM317 (I call this "Second Board Revision") and the last that we call Revision 2.1 with the big heatsink (I call this "Third Board Revision").

The answer of Rigol about this was : the first picture you send ("First Board Revision")are from the board Rev. V2.0, the others two are from the board Rev. 2.1, so no need to change ! On the old Rev ("First Board Revision") the heatsink is directly located next to 2 brown C’s.
Not the Size of the heatsink is important – the location is important – Also on the port is written which version it is.

From what I understand from this answer is that the last two versions that we have captured ("Second Board Revision", "Third Board Revision"), are from the same Top Board Revision (2.1) and the only Top Board that they change - under the warranty - is only the Revision 2.0 ("First Board Revision").

Have you any other information about this?

(Last Edit = with some syntax corrections)
« Last Edit: January 30, 2014, 07:23:23 am by lemon »
 

Offline Sparky

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #544 on: January 29, 2014, 05:56:01 pm »
I sent them three photos, one with the first topology of LM317 that the two capacitors and LM are very closely (I call this "First Board Revision"), the second with the movement of capacitors and LM317 (I call this "Second Board Revision") and the last that we call Revision 2.1 with the big heatshink (I call this "Third Board Revision").

The answer of Rigol about this was : the first picture you send ("First Board Revision")are from the board Rev. V2.0, the others two are from the board Rev. 2.1, so no need to change ! On the old Rev ("First Board Revision") the heatsink is directly located next to 2 brown C’s.
Not the Size of the heatsink is important – the location is important – Also on the port is written which version it is.


From what I understand from this answer is that the last two versions that we have captured ("Second Board Revision", "Third Board Revision"), are from the same Top Board Revision (2.1) and the only Top Board that they changed under the warranty is only the Revision 2.0 ("First Board Revision").

Have you any other information about this?

Thanks for this summary, and images of the different revisions all in one place. 

What you have shown is consistent with what I have read about --- there are only two different PCB revisions, with the placement of capacitors and LM317 being the major improvement.  The "Second Board Revision" and "Third Board Revision" both use the same (updated) PCB, with the only difference between them the size of the heatsink on the LM317.

I believe some people in the US got DP832 units from around Oct 2013 with the "Second Board Revision"; hopefully the "Third Board Revision" is shipping now.

From their comment, it seems Rigol considers only the location of the heatsink to be important, and not the size, and so they may decide to update units with "First Board Revision" only.
 

Offline lemon

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #545 on: January 30, 2014, 07:37:46 am »
Yes Sparky, you have completely right.

The information from Rigol to link: http://beyondmeasure.rigoltech.com/acton/fs/blocks/showLandingPage/a/1579/p/p-0011/t/page/fm/0
it seems that they refers only to Top Board Revision 2.0 (that I called First Revision Board) and not to Top Board with Revision 2.1 (with medium LM317 heatsink size).
 

Offline primsam

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Re: EEVblog #512 - Rigol DP832 Bad Design Investigation
« Reply #546 on: February 02, 2014, 10:15:50 pm »
Hello,

So this is my first post here :-)
i am only a electronic hobbyist whit not a verry god understanding of all that what is happening in this magic :-))

so my question is
is it normal that i can measure some AC voltage between ground and CH1-2-3 of my DP832?
in Numbers:
CH1 to GND 5.8V (7,8uA shorted whit multimeter) with channel turned off and 9,8V(9,8uA) with cannel on
Ch2 to GND 16,9V (10uA) with channel turned off and 12,1V(17uA)
and channel 3 is depandent to CH2 and has the same readings.

the reason why i ask is that this behavior has probably blown some electronic under test because i thinked i was safe with a isolated power supply like this
:-S

so can somone tell me if this is ok and in spec of the supply?
or have i a faulty unit?

or im only to stupid for this

Thanks
Samuel

And sorry for my bad english
 

Offline Electro Fan

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Rigol DP832 Status Summary
« Reply #547 on: February 09, 2014, 01:28:28 am »
I know, "use the search".

Anyone here willing to summarize where the Rigol DP832 stands with respect to feature and performance issues? 

(Despite the issues I'd like to purchase a 832 but I'm not in a hurry and I'm inclined to hold off until these are sorted out - assuming Rigol will get around to them).

Any updates on the following? (have any of these been fixed in new shipping units?):

turn-on spike

overheating

intermittent restart

channel 2/3 cross connect

below 10mA software

any other notable issues

Thanks, EF
 

Offline Sparky

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Re: Rigol DP832 Status Summary
« Reply #548 on: February 09, 2014, 02:16:29 am »
I know, "use the search".

Anyone here willing to summarize where the Rigol DP832 stands with respect to feature and performance issues? 

(Despite the issues I'd like to purchase a 832 but I'm not in a hurry and I'm inclined to hold off until these are sorted out - assuming Rigol will get around to them).

Any updates on the following? (have any of these been fixed in new shipping units?):

turn-on spike

overheating

intermittent restart

channel 2/3 cross connect

below 10mA software

any other notable issues

Thanks, EF

turn-on spike: not fixed (I don't think anyone knows if this plans to be fixed or not)

overheating: "fixed" (larger heatsink on LM317 + some layout changes)

intermittent restart: this was due to LM317 over-heating, so this is resolved

channel 2/3 cross connect: design issue; not fixed in currently shipping units; probably not going to be fixed by Rigol because they have published their "heavy duty wire" workaround

below 10mA software: fixed in software update

You might want to follow this thread.
 

Offline Electro Fan

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Re: Rigol DP832 Status Summary
« Reply #549 on: February 09, 2014, 03:09:19 am »
Sparky, thanks for the quick and concise answer.  Much appreciated!  EF

- PS, very nice "Marmad Formatted" DP832 - Firmware versions and bugs/issues thread you started.  I hadn't seen it but will definitely follow it now. Thx
« Last Edit: February 09, 2014, 03:40:58 am by Electro Fan »
 


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