| Products > Test Equipment |
| Problem AErr with Keysight U1242B |
| (1/1) |
| freda:
I was measuring some 12V stuff with the 10A range, just should be < 4Amp. Then changed to measure volts. Since then AErr on all switch setting, except the A. Switch on/off. Battery disconnect-reconnect. Persistent error, PIA when on the road, thought this was my most reliable meter, fairly new. So the A range has a probe detect switch in the socket. Ok,i'm using my own much shorter leads for the amp tests. Disassembled the meter, probe socket board. test the A socket, and continuity seems ok, probe in, switch closed, probe out, switch open. Looks the same whether i use Keysight lead, or my own. Maybe leakage on pcb?, there's a series resistor of 2.5M to the switch. cleaned around with iso-p No change still AErr,except A range. I'm a bit stumped about that.... So I ended up desoldering the 2pin socket connecting the A socket switch to the PCB. The meter works on all ranges now same as before. Except now i'm not going to have the probe detection in the A socket. Well i don't recall failing myself with 10amp ranges on other meters, so i think i'll be happy with just continuing my care with testing high current, as always. Any other thoughts? |
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