Operation; Powering The Meter; Disable Auto Power Off; Display Backlight - Extech Instruments MA140 User Manual

Operation
CAUTIONS
Read and understand all of the Safety statements listed in the safety section of this manual
prior to use.
Powering the Meter
1. Press the Power‐Backlight button to power the meter. Check the batteries if the unit fails to
power ON.
2. Press and hold the Power button for more than 2 seconds to power OFF the meter.
3. The meter has an Auto Power OFF feature (APO) where the meter switches OFF after 20
minutes of inactivity. To disable APO, refer to the next section.
Note: The meter displays the battery capacity when powering up.
Disable Auto Power OFF
The meter will auto power OFF after 20 minutes of inactivity. To defeat this feature, follow the
steps below.
1. With the meter OFF, press and hold the 'V' button and, while continuing to hold the 'V'
button, press the power button.
2. The display will show AOFF.
3. Release all of the buttons.
4. The Auto Power OFF function will now be disabled until the next cycle of power.
Display Backlight
With the meter powered ON, press the backlight button to switch the backlight ON or OFF. Note
that excessive use of the backlight will shorten the battery life.
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