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[Moved] troubleshoot and repair PM129B digital meter

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dd30

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I had purchased PM129B digital panel meter but it is not displaying the output in 200mv range .in 20 v range it is working . In 200mv range it is showing 1 . I had tested 15 meters all are showing same .
I had also adjusted the preset there is no reading
Please help.

D.Das
India ( Kolkata)
 

d123

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Hi! I may be wrong, maybe it's a faulty batch of DMMS, but "1" on the display can mean over-range. Are you measuring something under 200mV on the 200mV scale? If what you are measuring is over 200mV on the 200mV scale the DMM will say "1" "OL" or something like that.
 

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