Re: Ammeters vs Voltmeters ???

Posted by MarkB_MI on December 12, 2004 at 12:43:18 from (64.31.11.49):

In Reply to: Ammeters vs Voltmeters ??? posted by Alberta Mike on December 12, 2004 at 06:19:50:

I think the older vehicles and equipment used ammeters because the ammeter is a simple instrument to read: plus=good, minus=bad.

There are several reasons why the switch was made to voltmeters. I think the biggest one is that the high capacity alternators made it impractical to wire ammeters: either you have to have a remote shunt, or else you have to plumb a heavy gauge wire through the instrument panel. Also, it's pretty difficult to tell a one amp charge from a one amp discharge on a 100 amp ammeter. The main reason for using voltmeters is that they are simpler and cheaper in most applications.

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