[VAC] Re: Ammeter

["Dr. Gerald N. Johnson, electrical engineer" <geraldj@xxxxxxxx>]

Is there any indication on the meter face of its scale. Down in the
lower corners something like "fs = 50 mv"? That could help working up a
precalibrated shunt. Otherwise simply hook the ammeter leads to a couple
places along the wire leaving the charger (or loads and charger if a
center zero meter) and change the spacing of the taps until the meter
indicates reasonably. A standard shunt could be found and used, and most
are 50 millivolts drop for the full scale and the meter movement is only
a few milliamps.

Shunt type ammeters are more fragile than the full current ammeters and
so are the wires to them and that's probably why the Chrysler meters
quit working.

Gerald J.