Measuring Frequency

Special Tools EL–39200 Digital Multimeter (DMM) For equivalent regional tools, refer to Special Tools.

Caution

Refer to Test Probe Caution. The following procedure determines the frequency of a signal.

Note

Connecting the Digital Multimeter (DMM) to the circuit before pressing the Hz button will allow the DMM to autorange to an appropriate range.

1. Apply power to the circuit.
2. Set the DMM to the V (AC) position.
3. Connect the positive lead of the DMM to the circuit to be tested.
4. Connect the negative lead of the DMM to a good ground.
5. Set to Hz on the DMM.
6. The DMM will display the frequency measured.