:idea: Since the error appears on both the V and I ranges, it makes me wonder if there is a 'swamping' resistor - which may be fitted inside the meter housing itself - that has gone HR.
You also refer to oxidised switch contacts. Since this meter monitors V & I, presumably there is a switch for this: dirty contacts?
Al.
You also refer to oxidised switch contacts. Since this meter monitors V & I, presumably there is a switch for this: dirty contacts?
Al.
