At 09:53 AM 7/27/2013, ralph meyermann wrote:
>Thanks! I may have to bring my fluke 1587 meter home from work its more
>accurate than my fluke t5 600v. It never really worked right before the
>change either, tank was rusty so I replaced both. It may be a ground issue?

Panel ground is reference for the voltage regulator that supplies ten
volts to the gauges.

Sender ground is part of the current path.  The gauges are just
calibrated heaters, so anything that increases the resistance in the
sender circuit will make them read low.

Yrs,
d