1 HVACR317 – Core for Refrigeration Meters. 2 ELECTRICAL MULTIMETER TEST INSTRUMENTS.

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Presentation transcript:

1 HVACR317 – Core for Refrigeration Meters

2 ELECTRICAL MULTIMETER TEST INSTRUMENTS

3 VOM MULTIMETERS MEASURE RESISTANCE – VOLTAGE - CURRENT VOM MULTIMETERS MEASURE RESISTANCE – VOLTAGE - CURRENT ANALOG METER DIGITAL METER

4 VOLTAGE MEASUREMENT To Measure VOLTAGE Set the Leads Position the Selector Set the Range ALWAYS MEASURE VOLTAGE ACROSS THE LOAD or the SOURCE!

5 To Measure VOLTAGE Set the Leads Position the Selector Set the Range ALWAYS MEASURE VOLTAGE ACROSS THE LOAD or the SOURCE!

6 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!

7

8 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!

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

10 CLAMP-ON AMP METERS

11 CLAMP-ON AMP METERS CLAMP AROUND CONDUCTOR

12 MEGOHMMETERS (Meggers) MEASURES MOTOR WINDINGS