Operation; Powering The Meter; Display Backlight; Work Light - Extech Instruments MA160 User Manual

4. Operation
CAUTION: Read and understand all of the Safety statements listed in the safety section
of this manual prior to use.
Powering the Meter
1. Turn the rotary function switch to any position to power the meter. Check the batteries if the
unit fails to power ON. Refer to the Maintenance section for battery replacement.
2. Turn the function switch to the OFF position to power OFF the meter.
3. The meter has an Auto Power OFF feature (APO) where the meter switches OFF after 15
minutes of inactivity. When APO is enabled, the APO icon will show on the display when the
meter is powered ON,
The low battery symbol appears on the display when the battery voltage weakens below the
threshold.
Display Backlight
With the meter powered ON, press and hold the backlight button
OFF. Note that excessive use of the backlight will shorten the battery life.
Work Light
With the meter powered ON, press the Work Light button on the right side of the meter. A
momentary press will switch the Work Light off. The Work Light lamp is located on the back of the
unit toward the bottom of the clamp jaw. Note that excessive use of the backlight will shorten the
battery life.
Data Hold
To freeze the LCD meter reading, press the Data Hold (H) button. While data hold is active, the H
display icon appears on the LCD. Press the (H) button to return to normal operation. The H icon will
switch OFF.
Test Lead Considerations
Test lead probe covers can be removed for CAT II 1000V installations. Use the test lead probe
covers for CAT III 1000V installations. Do not measure voltages > 1000V DC or 600V AC. Remove
the storage caps from the meter end of test leads before connecting leads to the meter.
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