Next message: Bob McLeran: "Re: TWL: GPS Sensor"
Generally speaking, analog meters are current-sensitive devices and have low
resistance and ultimately measure current. Voltage is measured by putting a
high resistance in series with a sensitive current meter, and measuring the
current flow through the resistor. Ammeters that use a shunt are really
voltmeters, measuring the voltage drop across the shunt. Ammeters that
handle the full current of the load do not have an internal shunt, they just
pass all the current through the meter, which doesn't need to be very
sensitive and, thus, not very expensive.
I've never heard of an "internal shunt ammeter". Does anyone know of such a
thing?
Hal
-----Original Message-----
Anyone ever converted an internal shunt ammeter to use an external shunt?
Right now, my ammeter outputs go the the ammeters at the lower station, then
to the ammeters at the upper station, then finally back to the battery. I'd
like to change this - hopefully without buying four new meters!
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