In a message dated 1/28/2007 2:52:27 PM Eastern Standard Time,
dhallam@rapidsys.com writes:
Given the relative low accuracy of normal AC panel meters, how can you be
sure that you are actually within the filament voltage tolerance specified
by the manufacturer? A high accuracy AC meter is a rather large and
somewhat expensive animal.
One way I have done it is to make my own AC panel voltmeter using a low ac ma
range meter and variable resistor and calibrate it with a good quality AC RMS
DVM like a Fluke. Likewise you can check the calibration of a regular AC
voltmeter with a DVM. Then you should have a good accurate AC voltmeter
calibrated
to your target voltage.
73 Todd WD4NGG
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