Ammeter ideal for testing, leaving on work bench for long periods
Disable Auto Power Off (Fluke 115 &amp; 117)

All the ways...


The Meter automatically enters "Sleep mode" and blanks the display if there is no function change, range change, or button press for 20 minutes. 
Pressing any button or turning the rotary switch awakens the Meter. 
To disable the Sleep mode, hold down the yellow button while turning the Meter on.
The Sleep mode is always disabled in the MIN MAX AVG mode.