| Electronics > Repair |
| 3458A |
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| drhex:
Then I have an issue with the box. Meh. 205, "HARDWARE FAILURE -- CAL VALUE OUT OF RANGE 101" 210, "HARDWARE FAILURE -- CALIBRATION REQUIRED" 101, "CALIBRATION ERROR" 101 is precharge DAC, assume this is A3? |
| drhex:
Strange thing it is working pretty well when it is just sitting there. Average drift over the last 30 days is 0.12156 in a completely temperature uncontrolled environment with TEMP? varying from 37.4 to 39.1 degrees. So good enough by KS standards. @ianj thinks it might be a weak relay - how do I find that? |
| drhex:
Another interesting finding, stepping up through the ranges I get materially different indications between mA and A i.e 0.0000984 A and 0.0999915 mA for a .01 mA input from a 3245A. |
| IanJ:
Weak relay or iffy contacts for the issue whereby it wasn’t letting you ACAL with the bananas populated……if I read you correctly. I’d be looking at this issue first before any drift problem. Ian |
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