Re: Check Ampere Gauge

Posted by Bob M on October 07, 2005 at 05:54:30 from (66.67.18.70):

In Reply to: Check Ampere Gauge posted by Easy on October 06, 2005 at 17:43:03:

Ammeters fail frequently - and unpredicatably - as outlined below. However I've seen them work filled with water, with the glass broken and the hand all bent, etc. And I've seen pristine looking meters not work on account of a hand stuck.

A quick mechanical test for the ammeter movement is bring magnet close to the meter face. If you find certain orientations of the magnet that cause the ammeter hand to move either direction from "0", the hand is not stuck.

Electrically it's highly unlikely circuit thru an ammeter will go "open circuit" - it's simply a heavy copper strap connecting the two terminal posts. About the only thing that can cause it to go open is a direct hit by lighting or a ham-handed mechanic twisting a terminal off.

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