Resistance Measurements; Continuity Measurements - Extech Instruments MN30 User Manual

Resistance Measurements

WARNING: To avoid electric shock, disconnect power to the unit
under test and discharge all capacitors before taking resistance
measurements.
1. Press the power button for 3 seconds to power the meter.
2. Touch the test probe tips across the circuit. Disconnect one
side of the part under test so the rest of the circuit will not
interfere with the resistance reading.
3. Read the measured resistance on the display.
4. When the resistance value is overrange, 'ALL' will be
indicated on the display.
5. If voltage is detected (> 1V) the meter will switch to the
voltage mode.

Continuity Measurements

WARNING: To avoid electric shock, never measure
continuity on circuits or wires that have voltage on them.
1. Press the power button for 3 seconds to power the meter.
2. Touch the probes to the circuit or component to be tested.
3. The buzzer will sound if the resistance is < 30Ω. If the circuit
is open, the display will indicate "ALL". If voltage is
detected (> 1V) the meter will switch to the voltage mode.
Non-Contact Voltage Detector (NCV)
WARNING: To avoid electric shock, always check a known
circuit to determine if the meter is operating properly.
WARNING: Voltage may still be present even with no indicator
light. Do not rely solely on NCV detection to determine if
voltage exists.
1. Press and hold the NCV button. Do not release the button
while testing. To exit this measurement mode, release the
button.
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