[time-nuts] Troubleshooting Fluke PM6681

Ole Petter Ronningen opronningen at gmail.com
Sun Aug 16 06:20:04 EDT 2015


I have a Fluke PM6681 that has issues. When I got it, it gave results all
over the place, but after adjusting the 100Mhz multiplier-chain, it seems
to be much better; at least I get std.deviationwell within spec using a
split pulse to input A and B, 100 samples. I'd like to get it
professionally calibrated, but I don't want to send it in with known issues
- the cost of calibration will not be refunded if the instrument can not be
calibrated, and I believe it is no longer repairable.

So, the issue is that it fails the ASIC test (test 6), with err 2.The
service-guide lists a number of signals to be checked in test-mode, but I
am not able to see any of them. Since the counter seems to function, I can
only conclude that the signals are not present due to this error.. (Or that
I am mistreading the guide and looking in the wrong place, probably at
least as likely..)

Anyway, I cant seem to find a description of this particular error, does
anyone know what it means?


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