I acquired second hand Fluke 289 lately.
Instrument is very clean, like new, display is in new condition, inside also clean, fuses seems OK.
I was looking forward to 1uV resolution, I was wondering how it will be useful.
But I am disappointed, on 50.000mV range there is often large offset which fluctuates a lot (IMHO).
I recorded this fluctuation during 24hours.
There is substantial fluctuation sometimes even during 10 seconds, during 30 seconds, during one minute, which makes it impossible to REL the offset reliably.
Is it normal?
Can someone tell me if my new meter is faulty?
And YES, I shorted Volts and COM posts during recording, and YES I let the meter thermally stabilize for few hours before.