1. HVACR317 - Refrigeration
Meters

2. Electrical Multimeter Test Instruments

3. Analog and Digital Meters
VOM multimeters measure resistance, voltage, current
Analog Meter
Digital Meter

4. Voltage Measurement
To measure voltage: set the leads, position the selector, and set the range. ALWAYS measure voltage across the load or the source.

5. Voltage Measurement
To measure voltage: set the leads, position the selector, and set the range. ALWAYS measure voltage across the load or the source.

6. Resistance Measurement
To Measure resistance: set the leads, position the selector, and set the range. ALWAYS measure resistance across the load, DISCONNECTED from the power source.

7. Resistance Measurement
ALWAYS measure resistance across the load, DISCONNECTED from the power source.

8. Current Measurement
To measure current: set the leads, position the selector, and set the range. Measure current in series, with the load CONNECTED to the power source.

9. Current Measurement
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 the conductor

12. Motor Winding Measurement
Megohmmeters (“Meggers”) measure motor windings.