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Unformatted text preview: meter is connected to. Also, since all the current will flow through the ammeter when it is connected be sure that the circuit current will not exceed the maximum rating of the meter. checking continuity and for measuring the resistance of components. Zero resistance indicates a short while infinite resistance indicates an open in a circuit or device. A reading higher than the specification indicates a faulty component or a high resistance problem such as burnt contacts, corroded terminals or loose connections. Page 3 © Toyota Motor Sales, U.S.A., Inc. All Rights Reserved. ANALOG AND DIGITAL METERS Ohmmeters, because they are selfpowered, must never be connected to a powered circuit as this may blow a fuse in the meter and damage its battery. Unless the circuit being measured contains a diode, polarity (attaching the leads in a particular order) is inconsequential. An analog ohmmeter should be calibrated regularly by connecting the two leads together and zeroing the meter with the adjust knob. This compensates for changes in the state of charge of th...
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This document was uploaded on 02/15/2014 for the course ELECTRICAL 3 at UCLA.

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