Amprobe ACD-45PQ Power-Quality-Clamp - Manual (Page 20)

14

/ Functions
Set the slide-switch function-selector to the  / function position. Default
at last selected function. Press SELECT button to toggle between  and
measurement functions.
Backlighted Display
Press the SELECT button for 1 second or more to toggle the display backlight
on or off.
Auto Power Off (APO)
The meter turns off after approximately 30 minutes of neither switch nor
button activity. To wake up the meter from APO, press SELECT button or slide
the function-selector to OFF position and back on again. Always turn the
function-selector to OFF when the meter is not in use.