[Test-Equipment] Meter movement on Eico 249 VTVM

[Mike Manes]

Static buildup on plastic (acrylic, typically) meter windows can pull the
needle 'way off zero, but it's easy to diagnose: just breath on the window -
if the needle returns towards zero, then the fabric softener treatment may
save you a lot of heavy breathing for a while.  But if the breath test
doesn't make anything happen, then the problem may be mechanical, e.g. a
bent needle or the zero adjustment becoming disengaged from the zeroing
arm.  In that case, one must open the case.  Most of the plastic meters
I've worked on can be opened by removing it from the instrument and prying
gently into the gap between the meter case and the edge of the face from
the backside. But I've no experience with this particular instrument.

73 de Mike W5VSI

On 9/12/2011 17:21, Brooke Clarke wrote:
> Hi John:
>
> Had this problem with a light meter, see:
> http://www.prc68.com/I/Nikon.shtml#WP1000
> Try wiping the meter down with a Downey fabric softener cloth.
>
> Have Fun,
>
> Brooke Clarke
> http://www.PRC68.com
> http://www.End2PartyGovernment.com/
>
>
> John King wrote:
>> I have a very nice and clean Eico 249 VTVM with a mechanical problem.
>>
>> The meter works electrically, but the mechanical zeroing screw will not set the meter movement at ZERO.
>>
>> Does anyone know if the cover of the face can be removed to enable getting to the manual ZEROing mechanism? I don't want to damage the plastic meter face, but need to get into the meter to fix the zero screw. Suggestions based on actual knowledge and experience will be greatly appreciated. Thanks and 73, John, K5PGW
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-- 
Mike Manes    mrmanes at gmail.com     Tel: 303-979-4899
"Things should be made as simple as possible, but not more so."
A. Einstein