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measured. Every voltmeter has an impedance,
which is the meter's internal resistance.
The impedance of a conventional analog
voltmeter is expressed in "ohms per volt."
The amount of resistance an analog
voltmeter represents to the circuit
changes in relation to the scale on which
it is placed. Digital voltmeters, on the
other hand, have a fixed impedance
which does not change from scale to scale
and is usually 10 M ohms or more. Page 2 © Toyota Motor Sales, U.S.A., Inc. All Rights Reserved. ANALOG AND DIGITAL METERS There is not a great difference between
analog and digital ammeters. Digital
meters are often capable of measuring
smaller currents, all the way down to
microamps. They are easier to use
because they give a specific value,
eliminating the need to interpret the
analog meter's needle on its scale.
Generally speaking, most digital
ammeters are combined with a voltmeter. AMMETERS—
ANALOG AND DIGITAL
A mmeters measure amperage, or
current flow, in a circuit, and provide
information on current draw as well a...
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