Re: Reading anomaly on old Philips DMM.
The usual cause of this is the integrating capacitor used by the ADC. If you check the datasheet of well-known ICs like the ICL7107, you'll see they recommend using polypropylene types for this...
However, I assume it did work correctly once? So Philips would have no-doubt fitted the correct type initially. But has it degraded in some way? Or is there some contamination on the PCB that is causing problems?
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