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How to calibrate Siglent SPD1000X / SPD3303X / SPD3303X-E series power supplies?
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oz2cpu:
side by side compare picture
mawyatt:
Successfully upgraded the just received (from Saelig) Siglent SPD3303X-E to a SPD3303X following the procedures outlined by folks here with much thanks  :)

After the latest firmware install and then the mentioned upgrade today, we did the calibration per the Service Manual. This took a few tries to understand and get the calibration in order since we don't have a precision load and just used the KS34465A DMM current shunt and wiring as a "load" for the current calibration. Used 1V and 20V for the voltage cal and 100ma and 2A for the CH1 current cal and 200ma and 2A for the CH2 current cal, CH2 would not produce an output current much below 200ma, so this was selected as the lower cal point for CH2. As mentioned above by kahuna0k you don't need to use the exact service manual values, since this is just fitting a y = mx + b  linear equation for both voltage and current. However you do need a known accurate DMM and why we chose our most accurate DMM.

Eventually everything came together and the cal was completed, and to our delight the PS shows a very stable 10.000 volt output as shown. No attempt was made to shield the PS from the cycling AC, or anything else and the test leads were a half combination of twisted pair banana to banana, to the supplied banana to gator clips for total ~6 foot length from PS to DMM (indeed, not an optimum calibration setup).

Image below is from KS34465A DMM with PS set to 10.000VDC.

Best,

sjm:
Just a quick update: I upgraded my previously hacked SPD3303X-E with the new and shiny official firmware for SPD3303X and the upgrade worked flawlessly.
After the upgrade, I decided to calibrate my psu once again, while I was at it. Used the Linux command line SCPI tool for that, over my LAN.

 :-+   :clap: :clap: :clap:

BR, -sjm
tautech:
ex Factory manual adjustment PDF attached.
In short form of the calibration procedure from the service manual.
AdiGital:
Hello all.
I'm having a weird problem issuing calibration commands (for X-E in X mode)

1. Connection via ETH using EasyPower and PuTTY
2. Communication works as the unit responds
3. Sending commands *CALCLS 0/1 makes the channel "uncalibrated" - showing and outputting wrong values
4. Sending commands CALibration:VOLTage ch1,1,0.980 and CALibration:VOLTage ch1,2,24.450 does nothing but beeps.

Restarting the unit brings correct values as I didn't send the *CALST

I think I've searched all I could find. I'm following the manual provided here (thank btw!)
I'm using a new unit that came with 07R2 version. I downgraded to 05 X-E, then used the modified 05 X. Then finally used official 07R2 X.
Hardware version is V3.0

Hope the problem is only between the chair and the keyboard.
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