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Case Tractors Discussion Forum
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Ammeter vs. Ampmeter

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Paulver

10-22-2005 13:20:05




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Question 1: Is there a difference between an ammeter and an ampmeter? If so, what is that difference?

Question 2: I have a Case 580CK that has both an alternator light and an "ampmeter". We're rebuilding the machine and the wires were taken off before I got on the scene, so I am at a loss. I have wiring diagrams for both an "ammeter" (not an ampmeter) and an alternator light, but not both together.

Question 3: Does anyone out there know how to do this without burning up the gauges and wiring?

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John T

10-22-2005 18:35:57




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 Re: Ammeter vs. Ampmeter in reply to Paulver, 10-22-2005 13:20:05  
Paul, its the same meter regardless what one calls them. The ammeter wires in series BETWEEN the hot ungrounded battery voltage source (often at the starter switch) and the Alternator or Generators regulated output, which would be the BAT terminal on a Voltage Regulator. ALSO, loads like light and ignition switches would be wired to the ammeters Load terminal, the same terminal that wires to the BAT on the VR.

ONLY ONE WIRE, THE Hot ungrounded battery feed (maybe from the starter switch) wires to the ammeters SUPPLY terminal, while loads (lights ignition) PLUS the charging output (BAT terminal on a VR) wires to the ammeters other LOAD terminal.

Im not sure of all idiot lights, but on like the GM 10 SI alternators, they wire from a hot voltage source to the alternators lil No.1 terminal to suppy excitation voltage.

John T Nordhoff in Indiana, retired electrical engineer.

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gbourck

10-22-2005 16:31:28




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 Re: Ammeter vs. Ampmeter in reply to Paulver, 10-22-2005 13:20:05  
No Difference. Historically, the AMPMETER, which is a METER that measures AMPERES, became the victim of common language - depending on the accent or speed of speech, you can't hear the "P". So over time, it went both ways.

For some gauge info, go to:
Link

I got it from someone in this forum and it helped me hook up my AMPMETER.

Can't help you with the light though - sorry.

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