cliftyhanger
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| posted on 12/7/11 at 04:25 PM |
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Multmeter woes
Just inherited a Fluke77 meter. Stuck a battery in it and the display comes on as expected, all the controls seem simple enough.
however, it will not sit at zero on Volts (ac and dc, both start at about 10 and go up to about 50, give or take, range means will read 4.7 or
whatever if you play) and amps up to about 1.1, again ac and dc.
Any clues?? is there a calipbration/zero fiddle?
Thought somebody on here may know
edit
had a look on the net, seems this is a series 1 version, so long in the tooth, but very expensive new......
[Edited on 12/7/11 by cliftyhanger]
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rallyingden
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| posted on 12/7/11 at 04:49 PM |
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Bad Leads?
RD 
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cliftyhanger
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| posted on 12/7/11 at 04:52 PM |
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no leads plugged in 
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dave r
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| posted on 12/7/11 at 05:04 PM |
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as its been sitting for a while, give the switch a fiddle... dont take apart, just work it for a while....
works with my old fluke
the contacts appear to be self cleaning
I'd love to give my imaginary friend a great big hug,
but this jacket makes it impossible.
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rallyingden
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| posted on 12/7/11 at 05:34 PM |
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quote:
Originally posted by cliftyhanger
no leads plugged in
Yeah but they are usually calibrated WITH leads connected
RD
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britishtrident
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| posted on 12/7/11 at 05:56 PM |
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Is it reading zero volts when both leads are touching to complete a circuit. ?
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matt_gsxr
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| posted on 12/7/11 at 06:18 PM |
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some tips here.
http://www.edaboard.co.uk/fluke-77-ohms-reading-cal-off-t226654.html
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MikeRJ
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| posted on 12/7/11 at 06:28 PM |
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This is an autoranging voltmeter, it will default to the most sensitive range if you switch it on and have nothing connected to it, and general
electrical noise will cause it to read a non-zero value. What happens if you actualy measure a known voltage with it?
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