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6 Cards in this Set
- Front
- Back
how does an ammeter work?
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transfers the magnetic field of current flowing through a conductor to meter movement
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what is the result on the meter reading of clamping the jaws of a of a clamp on ammeter around two wires?
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nothing; the magnetic field of the conductors counter act each other
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How can a very small ampere draw be measured with a clamp on ammeter?
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wrap the conductor around the jaws of the clamp on ammeter, and divide the reading by the number of loops of the conductor
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If a conductor was wrapped around the jaws of a clamp on ammeter four times, the proper reading would be......... if the clamp on ammeter was reading 16 amps
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4 amps
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air conditioning or refrigeration equipment can operate properly at ............ % above or below its rated voltage?
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10
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If a technician has no idea of the voltage available to a unit, what procedure should be fallowed on reading the voltage?
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The technician should start with the highest volt scale and reduce the setting, as required, to read in the middle of the meter scale.
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