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Re: Analog meters & static charge
Original poster: "Ed Phillips" <evp-at-pacbell-dot-net>
Tesla list wrote:
>
> Original poster: "S&JY" <youngsters-at-konnections-dot-net>
>
> Folks, I need some advice. I have 4 large analog meters of good quality
> (e.g. Simpson) to measure AC and DC volts and amps in my power controller.
> When I run my coil then shut it off, I notice some of the meter needles do
> not return to zero. What happens is that the meter face accumulates a
> static electric charge, and that attracts and deflects the meter needles.
> Obviously, this destroys the accuracy of my meter readings.
>
> My temporary cure was to stretch some of the silvery conductive plastic
> (e.g. from bags used to ship PC boards) across the meter faces to prevent
> static charge accumulation. But that makes the meters hard to read.
>
> Does anyone have some ideas on materials I can use that are both conductive
> and transparent? Or some other technique to eliminate meter face static
> charge buildup from all the streamers flying around nearby?
>
> Thanks,
> --Steve Y.
Usually just breathing on them helps. I've tried wiping them with a
used "dryer sheet" from the laundry. That seems to help ("eliminates
static cling") but doesn't look too neat.
Ed