Re: Fluke 79 acting up


James Sweet <jamessweet@xxxxxxxxxxx> wrote in message
news:Woopj.1074$f73.936@xxxxxxxxxxx
This thing has performed flawlessly for many years, but when I turned it
on
today something was not right. The ohms range flickers random readings,
with
no probes plugged in I get around 230K on the display, or 2.22M, depending
on the range, which would imply that the problem is ahead of the scaling
circuit. When I switch to the low ohms range, the reading starts around
240
ohms and then drops to -0.00 over a period of 10 seconds or so, frequency
reading works, but AC volts reads 70mV when plugged into a 120V outlet.
Something strange is going on! I realized that I don't currently have a
backup meter, I suppose I could use this as an excuse to buy a true RMS
Fluke, I don't think I can bring myself to buy a cheapie, except perhaps
as
a backup. Anyone run into this?




I invested in a moulded rubber surround for my 77, after repairing one
that had been jarred and the main SMD chip had loosened. Someone I know
managed to put his knee on his, while working on the floor, and also
dislodge the main chip. Both repaired after attending to the main chip.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/







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