Resistance Measurements; Continuity Measurements - Extech Instruments EX360 User Manual

Resistance Measurements
Cautions: Switch OFF power to the device under test before measuring. Do not test on circuits
or devices where 60VDC or 30VAC is present.
1. Insert the black test lead banana plug into the negative (COM) jack. Insert the red test
lead banana plug into the positive (V/Ω) jack.
2. Turn the Function Switch to the Ω position.
3. Use the M button to select the Ω icon on the display indicating resistance only (without
the audible continuity icon showing).
4. Touch the test probe tips across the circuit or part under test. It is best to disconnect one
side of the part under test so the rest of the circuit will not interfere with the resistance
reading.
5. Read the resistance value in the display. The display will indicate the proper decimal
point and value. If the reading is out of range, the OL display icon will appear.
Continuity Measurements
Insert the black test lead into the negative COM terminal and the red test lead into the
1.
positive terminal.
Set the function switch to the position.
2.
Use the M button to select the Continuity mode. Look for the Continuity icon on the
3.
display.
Touch the test probe tips across the wire or circuit under test.
4.
If the resistance is < 20 Ω, the beeper will sound and the LED lamp at the top of the meter
5.
will flash. The beeper and LED lamp will switch off if the measured signal rises above
approximately 200 Ω. For an open circuit condition the meter will display
Fig 4‐6 RESISTANCE/CONTINUITY MEASUREMENTS
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