Continuity Measurements - Extech Instruments EX650 User Manual

Continuity Measurements
1.
Insert the black test lead into the negative COM terminal and the red test lead into the
positive terminal.
2.
Set the function switch to the position.
3.
Use the M button to select the Continuity mode. Look for the Continuity icon on the
display.
4.
Touch the test probe tips across the wire or circuit under test.
5.
If the resistance is < 30 Ω, the beeper will sound continuously. For an open circuit condition
the meter will display
Continuity Measurement Notes:

Turn off power to the circuit under test and discharge capacitors before measuring
continuity.

Open‐circuit voltage is approx. ‐3.5V

Continuity measurement range is 600Ω.

For personal safety, do not measure a circuit with voltages > 30V DC or AC.

Disconnect test leads and circuit measured after measurements are completed.
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Fig 4‐7 CONTINUITY MEASUREMENTS
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