"Mark D. Zacharias" writes:

"Mark D. Zacharias" wrote in message
om...

"Sam Goldwasser" wrote in message
...
"Mark D. Zacharias" writes:

Mike Muderick wrote:
Tried all of the above. There is no zero-adjust screw. Took the
plastic cover off to try and discharge any static electicity.
Nothing is bent- meter wasn't dropped- It just won't go back to zero.
mm


"Reinhard Zwirner" wrote in message
...
Mike Muderick schrieb:

I have a battery tester meter (Mallory) that came from a retail
store. The meter is magnetized and now sits center scale, instead
of over to the left. Any solutions to return it to it's normal
state. I tried reverse polarity- it goes to the left, but then
returns to center.

I've seen such an effect when the transparent plastic cover of the
scale has
been wiped intensively for cleaning purposes generating electrostatic
charge.
Try to breathe on the plastik to discharge it.

HTH

Reinhard


Maybe the internal magnet shifted.

Mark Z.

Huh?

--- sam | Sci.Electronics.Repair FAQ:

Well, the coil has to react with something. It's been a long time since
I've taken a meter movement apart, but clearly at the heart of the meter
movement is a magnet. If the magnet is normally stationary, while the
meter coil and pointer move with voltage applied, if the magnet were to
physically rotate, this would affect the zero center of the coil /
pointer, yes?

Mark Z.


Actually, just realized my error. If the coil were magnetized, my point
might have been valid, otherwise not.

"never mind"

Right.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
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