EXTECH MG325 [10/18] Continuity measurements

10 MG325-en-GB_v1.1 3/16

6.7 CONTINUITY MEASUREMENTS

WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors

before taking continuity measurements. Remove the batteries and unplug the line cords.

WARNING: To avoid electric shock, never measure continuity on circuits or wires that have a voltage.

1. Set the function switch to the position.

2. Insert the black test lead banana plug into the negative

COM jack (5).

Insert the red test lead banana plug into the positive

jack (4).

3. Press the TEST button on the meter (or on the test leads, if

using the test lead with the TEST button) to put the meter

in test mode. The display will show TEST and the alert

LED will light.

4. The meter defaults to test lock mode (lock icon displayed)

so the test will run without having to hold TEST. Press and

hold the lock button to change to manual test mode (TEST

button must be held throughout the test).

5. Reset the display to zero before testing: Short the test

probes and note the value. Short the test probes again and

press and hold ZERO until ZERO is displayed (0.00Ω

reading when successful). Press and hold ZERO again to

exit.

6. Touch the test probe tips across the circuit or part under

test.

7. If the continuity buzzer is turned on in the SETUP mode,

the buzzer will sound if the resistance <30. Read the

resistance in the main display and with the lower bargraph.

8. If the circuit is open, the display will indicate “>”. If 2V or more are sensed on the device under

test, the meter will stop the test and ‘UE HI TEST’ will display.

9. If the ‘FU FAIL’ prompt appears, the fuse must be replaced before use (see the Maintenance

section for fuse and battery replacement information).

10. Short press the H (Hold) button to freeze (H icon displayed) or unfreeze (no H icon displayed)

the displayed reading.

11. Press

to store the reading

12. Note that the Auto Power OFF function activates after 10 minutes of inactivity. The meter will

audibly beep just prior to shutting off.

TEST