Meter Power; Automatic Power Off (Apo) - Extech Instruments EX820A User Manual

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Meter Power

The meter is powered by one (1) 9 V battery. The battery compartment is lo-
cated on the back of the meter.
The APO feature switches the meter OFF after approximately 30 minutes of
inactivity.
When the battery power is critically low, the battery icon
the battery when this icon appears. See the Maintenance section for battery
replacement instructions.

4.1 Automatic Power Off (APO)

To conserve battery life, the meter automatically switches off after approxi-
mately 15 minutes. To turn the meter on again, turn the function switch to the
OFF position and then to the desired function position.
To disable the APO, follow the steps below.
1. From the OFF position, hold the MODE button and rotate the function
switch to a measurement function.
2. The meter will beep four times, release the MODE button.
3. APO is now disabled (APO icon
4. When the function switch is turned to the OFF position, APO is again en-
abled (default).
#NAS100175; r. AA/97099/97616; en-US
switches off).
appears. Replace
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