Meter Power; Auto Power Off (Apo); Ac/Dc Voltage Measurements; Operating Instructions - Extech Instruments MN30 User Manual

Operating Instructions

WARNING: Risk of electrocution. High-voltage circuits are very
dangerous and should be measured with care.

Meter Power

Press and hold the power button for approximately 3 seconds
to power on the meter. The LCD will display 'ALL'.

Auto Power OFF (APO)

APO turns the meter off after 15 minutes of inactivity.
Flashlight
The MN30 has an flashlight to make working in dark areas
easier. Press the
again to power OFF the flashlight.

Data Hold

The Data Hold function freezes the reading in the display.
Press the H button to switch Data Hold ON/OFF. When the
Data Hold mode is active the display will show the H icon.

AC/DC Voltage Measurements

CAUTION: Do not measure voltages higher than 600V.
Damage may occur to the meter.
1. Press the power button for 3 seconds to power the meter.
2. For DC, touch the black test lead to the negative side of the
circuit under test and touch the red test lead to the positive
side. For AC, the test lead polarity is not a factor.
3. If the voltage is > 1V the meter will measure and display
voltage. If the measured voltage is < 1V the meter will
automatically change to the resistance function.
4. For DC only, if the test leads are reversed, a minus sign will
be displayed.
5. If the voltage is overrange, OL will display.
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