Analog_vs_Digital_Meters

That is the positive or red lead is connected to the

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Unformatted text preview: rrent. That is, the positive or red lead is connected to the circuit closest to the positive side of the battery. The negative or black lead is connected to ground or the negative side of the circuit. If a voltmeter is connected in series, its high resistance would reduce circuit current and cause a false reading. Page 1 © Toyota Motor Sales, U.S.A., Inc. All Rights Reserved. ANALOG AND DIGITAL METERS Because voltmeters are always hooked to a circuit in parallel, they become part of the circuit and reduce the total resistance of the circuit. If a voltmeter has a resistance that is too low in comparison to the circuit, it will give a false measurement. The false reading is due to the meter changing the circuit by lowering the resistance, which increases the current flow in the circuit. The effect a voltmeter has on the circuit to which it is attached is sometimes referred to as "loading effect" of the meter. The loading effect a voltmeter has on a circuit is determined by the total resistance of the circuit in relation to the impedance of t...
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This document was uploaded on 02/15/2014 for the course ELECTRICAL 3 at UCLA.

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