IDEAL TightSight 61-415 Manuel D'utilisation Et De Sécurité page 21

Function
Low Battery
Indication
APO
Restore APO
Disable Auto
Power Off
Function
Description
When the battery voltage < 3.6±0.2V, the low battery indication is
displayed on the screen
When the battery voltage drops to less than 3.1±0.2V, "bAtt" is
displayed for 5 seconds then shuts off. When the battery voltage is less
than 2.3V, the meter is unreliable. Battery life varies by battery brand
This ensures accurate readings.
No actions of the rotary dial or button presses for 30 minutes will
automatically cause the unit to shut down and enter the low-power state.
Turning the meter off and then on will reset the meter to the default
shutdown function, the LCD displays the "APO" symbol.
All the buttons can wake up the unit or rotate the dial switch to OFF
setting and then turn on the unit to wake it up. Note: Use caution as
shutting the unit off will lose any Max Min data that may have been in
volatile memory.
Pressing the "SEL" key while turning on the unit at the same time, will
cancel the auto shutdown function. Buzzer will beep 5 times and the
LCD will not display the "APO" symbol.
and the meter still works normally.
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