Prokit's Industries MT-4015 - Manual (Page 9)

>1sec. the light will be turned off. If the back light is
not closed within 60 seconds, it will be turned off
automatically.
3. Unit key
1) Unit set
 Velocity unit.
Press Unit key <1sec. can change the Velocity unit.
(m/s, km/s, fpm, mph, kts, Beaufort scale)
 Temperature unit
Press and hold the Unit key >1sec. can change the
Temperature unit. (℃,℉)
2) Auto power off
When the meter is powered on, it is under auto
power off mode. The meter will power itself off after 20
minutes if no key operation.
Cancelled auto power off function: Press and hold
the ON/OFF key until the LCD display AP ON, .press
Unit key to select AP ON or AP OFF, then press the
Func. key to confirm the setting.
AP ON ----- Auto power off availability.
AP OFF --- Auto power off unavailability.
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