Electronics > Repair

Fluke 8840A - Codes 7 & 15

(1/1)

mbear2k:
I have a new to me Fluke 8840a and am working my way through cleanup and test.  Doing the self-test indicates an error 7 and error 15.  These are "1000v DC + 20 Mohm" and ""1000v DC + X10 T/H + 20 Mohm" tests respectively.

Error 7 is intermittent in that maybe 3 out of 10 self-tests pass.

The manual describes the errors in a general sense, but wanted to see if anyone has experience with these errors and what they found.

Thanks

mzacharias:
On my 8840 A the wires attaching to the Volts - Ohms jacks were creating excess resistance only noticeable in Ohms mode. The push-on connectors were covered in a thin layer of white powdery looking stuff that looked like zinc oxide. I cleaned and tightened the connections - never a problem since. Perhaps dissimilar metals here?

mbear2k:
Good thought.  I'll look that over tonight.  I'd expect that the self-test with nothing connected would see the jacks wide open.  But will look, and maybe see what the F/R switch looks like to start.  Then work my way back...

I forgot to mention that aside from the errors codes, the high ohms is off.  Low ohms seems spot on.  I have a precision 10 meg resistor that reads a little over 11 Meg.


emartine:
Hello. You ever got around these errors? I got the same ones.
Thank you.

Navigation

[0] Message Index

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod