John Devereux <[email protected]> writes: > Hi, hope this is not off topic - well it does measure volts... > > I just received a 6517A electrometer but it appears to have a fault. > > On volts, with shorted input, the reading usually drifts rapidly > upwards. For example 10mV in 10 seconds on the 2V range. > > It is usually OK (stable to 10uV) at power-up, but the fault can be > provoked by tapping it lightly with e.g. a finger. Then it runs > away. > > I can hear a faint noise, very like a relay switching when the unit is > tilted. Nothing obviously loose or rattling inside...
(replying to myself) OK, seems like the noise was a red herring. It is caused by the front panel bezel assembly flexing, there are metal grounding fingers that make the noise when they slide a bit! > Has anyone seen this? Could a reed relay fail like that? I poked around a bit more and I do think it is the relays inside the internal shield - not sure whether to attempt a repair or not. John -- John Devereux _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
