METREL MD 9040 Manuel D'utilisation page 16

MD 9040 & MD 9050 Digital multimeter Operation
Set Beeper Off
Press the RANGE button while turning the meter on to temporarily disable the Beeper
feature. Turn the rotary switch OFF and then back on to resume.
Auto-Power-off (APO)
The Auto-Power-off (APO) mode turns the meter off automatically to extend battery life
after approximately 30 minutes of no activities. Activities are specified as: 1) Rotary
switch or push button operations, and 2) Significant measuring readings of above 512
counts or non-OL  readings. In other words, the meter will intelligently avoid entering
the APO mode when it is under normal measurements.. To wake up the meter from
APO, press the SELECT, RANGE, RELATIVE or HOLD button momentarily or turn the
rotary switch OFF and then back on. Always turn the rotary switch to the OFF position
when the meter is not in use
Disabling Auto-Power-off
Press the SELECT button while turning the meter on to temporarily disable the Auto-
Power-Off feature. Turn the rotary switch OFF and then back on to resume.
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