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I have the same question. Two python scripts are mentioned in the attached E01A version of the service manual: VoltageCalib.py on page 14 and CurrentCalib.py on page 15.Some interesting things about this:1. The version E01B service manual which is presently available on Siglent's website says nothing about how to perform calibration.2. The "quick start" document that is really the product manual talks about the SCPI commands, but none of the documented commands have anything to do with calibration.3. The EasyPower utility program does not appear to have any functions related to calibration.
The SPD3303D I use has a voltage on channel 1 that is always 0.01-0.02v higher.Please see the pictures below.I don't know how to calibrate it