Hi!, I've just saved this multimeter (along with a couple more toys, more on that later) from a recycling center, it was in their pile of things to destroy and was stored outside in the rain.. thankfully there were some printers and other junk on top of it so it din't get all that wet.
When I run the self test from cold I get the following errors: 303.1, 400.2 and 401.2
If I let it warm up 303.1 disappears, and 402.2 appeared once.
I did a few basic measurements with it and it seem the higher ACV ranges are off, I'm getting about 1.7V with the two probes shorted.
Inside the unit is clean and there's no capacitor gunk. The cal seal was broken and somebody possibly attempted a repair on it (there are marks on the back nuts on the GPIB connector). The multimeter says it has been calibrated 3 times, and last one in 2014, But the cal sticker reports a date of 2016...
I had a look online and I saw that some resistor networks usually fail in them, In case I have to replace them do I have to re-run the calibration? I don't have instruments capable of calibrating it.