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Very old Multimeter repair

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LAN_403

Nik

Thu Oct 09 2008, 10:26PM

Registered Member #53 Joined: Thu Feb 09 2006, 04:31AM
Location: Ontario, Canada
Posts: 638

The resistance circuit has to be thrown out either way because there was no marking or indication or supply voltage needed. I have yet to test the current sensing but I will most likely replace it any way as I am already going to work on the other 2. The only problem I can see is being limited by the selector switches available. 1 5position switch for Mode slection and 1 5position switch for resistance range and AC or DC amp range (I cant tell as of yet)

aonomus

Fri Oct 10 2008, 02:37AM

Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801

I'm not sure about older resistors, but could those plastic cased resistors change resistance over time? You could always try measuring their current resistance and comparing to the *actual* code on the case.

Nik

Fri Oct 10 2008, 03:25PM

Registered Member #53 Joined: Thu Feb 09 2006, 04:31AM
Location: Ontario, Canada
Posts: 638

I did just that and most of them have drifted more then 20% from the printed value.

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