[ReverendMaynard]

"Auto Power OFF
The meter will automatically turn off after 30 minutes if no keys are pressed during this
period. Auto power off is disabled in the max/min recording mode."

EDIT: RTFM

If yours is shutting off every 10-15 minutes, you've either overclocked time, or the batteries are low. Honestly, neither would surprise me lol.

[HITandRUN]

Originally Posted by ReverendMaynard

"Auto Power OFF
The meter will automatically turn off after 30 minutes if no keys are pressed during this
period. Auto power off is disabled in the max/min recording mode."

EDIT: RTFM

If yours is shutting off every 10-15 minutes, you've either overclocked time, or the batteries are low. Honestly, neither would surprise me lol.

Good job reading the manual!