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How to calibrate Siglent SPD1000X / SPD3303X / SPD3303X-E series power supplies?
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mawyatt:
Be very careful with the self calibration of the SPD3303X-E that's been augmented to a SPD3303X. Follow the cal procedures explicitly and do not deviate. We didn't and caused a fixed current limit offset, that it not recoverable by any means so far, and the factory hasn't provided any help after numerous pleas.

We have two SPD3303X-E that are working fine and been calibrated per procedure, and another that has a 119ma current limit offset on channel 1 and a 95ma offset on channel 2 which basically makes it worthless for our needs (precision lab type use).

Best,
AdiGital:
I'm not sure what eventually did it but I was able to send the commands in the end. The calibration worked.

I installed and used NI Max. It behaved the same way initially - beep after CALibration:VOLTage... Then I started playing with VISA Test Panel configuration, namely enabling Termination Character as '\n'. It worked but now it also works without this option. It could also be I was using "Write" and now "Query" (assuming I'm writing to the instrument). I don't want to experiment too much as per what mawyatt warned about.

Both channels' outputs and readings are now aligned and accurate to single mV - measured with SDM3055.
BreakingOhmsLaw:

--- Quote from: mawyatt on November 03, 2021, 12:52:53 am ---We have two SPD3303X-E that are working fine and been calibrated per procedure, and another that has a 119ma current limit offset on channel 1 and a 95ma offset on channel 2 which basically makes it worthless for our needs (precision lab type use).

--- End quote ---

I have started a thread about a working procedure here:
https://www.eevblog.com/forum/testgear/siglent-sds3303x(-e)-calibration-fw1-01-01-02-07r2-best-practice/
The service manual is flawed in my opinion. Please try if this approach fixes your problem.
mawyatt:
Thx, will do :-+

Best
BreakingOhmsLaw:

--- Quote from: mawyatt on November 18, 2021, 02:50:00 am ---Thx, will do :-+

Best

--- End quote ---

Update: Procedure is updated & tested for all values now. This should fix your unit hopefully.
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