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Cannot zero offset error on Unigor A43 analog multimeter

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Kleinstein:
One normally does not have to adjust the mechanical zero of the movement very often. With age the zero should become even more stable. So one may be able to live without the easy adjustment from the front.

Gyro:
Yes, that's certainly a viable option if things don't free up easily and you don't want to force them. I'm not sure off-hand whether a taut band suspension will have a more stable zero than a traditional one, it only has one restoring element involved rather than a pair of coil springs, and of course no bearing friction.

I can't see from the photos whether it would be possible to replace the zero adjustment screw in a position where there is sufficient clearance for its pin. You certainly need to protect the hole against dust and swarf if not.

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