DSO1202B "self calibration failed, error: 0x502"

amy

ludarabota replied at 2017-11-11 01:37
I think - yes. I tried to measure a 12MHz crystal that is working for sure. At first the measurement ...

Sir, please disconnect any probe or cable to the input connector and do self calibration, is there still the problem?

ludarabota

I think - yes. I tried to measure a 12MHz crystal that is working for sure. At first the measurement was just perfect but then I tried again and I got ~260Hz. I push the Auto button and it that fixed the problem until some next measurement.
That happened several times even after power-down/power-up sequence.
I also tried to connect the probe to the 1kHz source of the device itself in order to calibrate but the result was the same - sometimes perfect, sometimes ugly.

amy

Sir, aside from self correction, is there a problem at work?