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HVACR317 – Core for Refrigeration

Meters

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ELECTRICAL MULTIMETER TEST INSTRUMENTS

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VOM MULTIMETERS MEASURE

RESISTANCE – VOLTAGE - CURRENT

ANALOG METER

DIGITAL METER

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VOLTAGE MEASUREMENT

To Measure VOLTAGE• Set the Leads• Position the Selector• Set the Range

ALWAYS MEASURE VOLTAGE ACROSS THE LOAD or the SOURCE!

W

VOLTMETER

VOLTMETER

LT-1

9 VDC

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To Measure VOLTAGE• Set the Leads• Position the Selector• Set the Range

ALWAYS MEASURE VOLTAGE ACROSS THE LOAD or the SOURCE!

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RESISTANCE MEASUREMENT

To Measure RESISTANCE• Set the Leads• Position the Selector• Set the Range

ALWAYS MEASURE RESISTANCE ACROSS THE LOAD DISCONNECTED FROM THE POWER SOURCE!

W

OHMMETER

LT-1

9 VDC

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ALWAYS MEASURE RESISTANCE ACROSS THE LOAD DISCONNECTED FROM THE POWER SOURCE!

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CURRENT MEASUREMENT

To Measure CURRENT• Set the Leads• Position the Selector• Set the Range

MEASURE CURRENT IN SERIES WITH THE LOAD

CONNECTED TO THE POWER SOURCE!

W AMPMETER

LT-1

9 VDC

AMPMETER

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ALWAYS MEASURE CURRENT IN SERIES WITH THE LOAD CONNECTED TO THE POWER SOURCE!

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CLAMP-ON AMP METERS

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CLAMP-ON AMP METERS CLAMP AROUND CONDUCTOR

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MEGOHMMETERS (Meggers) MEASURES MOTOR WINDINGS