"This reflects my experience when using it to measure close tolerance resistors - measuring them at low voltages gives poor results, but at higher voltage, the resistances are measured more accurately."
I noticed similar results in general, over years ad several instruments. Always wondered why, but we have a rule-of-thumb: if the part is to be used at X KiloVolts, test it at X Kilovlolt. My 34470A struggles with measuring 1 G Ohm resistors, placing it in "low power" helps, but not to my satisfaction. The HP/Yokogawa 4329A we have is stable as a rock, but of course analog output/ limited resolution. I will probably set up an old school work station to measure these 1G Ohm with a bridge and standard resistor made up of 10 99M precision resistors which we also use a lot, with a trim pot. On another instrument at the other end of he spectrum, my HP4328A milliOhm meter is having battery issues. Does anyone know if it can be run safely without the battery i it? I hate to destroy the calibration labels to get inside and look for myself. George Dowell _______________________________________________ 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.
