KPS DMM4500PV Manuel D'utilisation page 12

Auto Power Off
Wakeup the meter by dialing the switch or pressing any button.
Time Setting of Auto Power Off
Press the function button and turn the meter on. Then press the
function button to select the time. The time can be 5 minutes,
10 minutes, 20 minutes, and disabled (OFF).
High Frequency Rejection (HFR)
The High Frequency Rejection mode equip a low pass filter in
the AC measurements. The cut-off frequency (-3dB point) of low
pass filter is 800Hz.
After Specified Time
Without Operation
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