My Fluke 8800A doesn't return to zero DCV after measurement ranges 20V and under unless the probes are shorted together (floating). Everything else seems to work fine.
Is this a fault or were meters like this, I seem to recall my apprentice days shorting probes before measurements.
I have placed a 40M resistor across the terminals which sorts it out but should I need to do this.
Does anyone know if it's a fault or do they do this?
On the schematic the DC buffer circuitry all seems common so am I chasing a red herring?
Thanks peeps.