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How to calibrate Siglent SPD1000X / SPD3303X / SPD3303X-E series power supplies?

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sjm:

--- Quote from: tautech on January 19, 2019, 03:46:04 am ---
From a later post the Service manual is now available with Cal procedures outlined:
http://old.siglentamerica.com/USA_website_2014/Documents/manual/SPD3000X_Service_Manual.pdf

--- End quote ---

Oh yeah, yesterday I was able to calibrate my (hacked) SPD3303X-E to have almost 1mA/1mV accuracy on all levels of output.

I used my bench DMM and now the requested, PSU self-measured and DMM measured voltages and currents are nicely lined up.
On some voltages, the PSU is almost comparable to some lower quality voltage references.   :P

The description of the calibration process in the manual is maybe a bit hard to read and not so logically written at times, but after some thinking and testing it out a few times, yeah it works.
It is important to keep the power output enabled while inputting the calibration commands!

Thanks a lot! Now I can sleep better!    ::)


BR, -sjm

tautech:
A little something that is endorsed by the factory....SPD3303X/X-E units in series mode in series !

Elasia:

--- Quote from: tautech on July 29, 2020, 07:48:59 am ---A little something that is endorsed by the factory....SPD3303X/X-E units in series mode in series !



--- End quote ---

Interesting, what do they say about two units in series but internally in parallel mode?

oz2cpu:
i have the same "problem" this one is the best of all my units
SET SAY 2.010
OUT SAY 2.012
but in reality there is 2.008

it is not a big deal, right now,
but those are the true X version, not a hacked upgrade, I did pay 140 Euro EXTRA pr unit for that extra precision,
so i did expect the readouts and setpoints to be a lot more spot on.
also they drift 2mV the first hr, they are turned on, that i did not expect either.

oz2cpu:
look at the attached spec sheet.
the last digit that the X version provide, is just resolution, not accuracy,
since it can be up to 10mV off, and still be within spec.
so it seem a bit odd, to make and sell a version X, with this extra digit,
 

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