Prokit's Industries MT-4014 - Manual (Page 9)

once >2sec. the light will be turned off, and the icon will
disappeared.
5. Auto power off setting
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 Hold key when
power on until the LCD display AP OFF, then press the
Hold key again to confirm the setting.
■. Maintenance
1. CLEANING INSTRUCTIONS
The meter may be wiped down with a wet sponge or
cloth using a mild water based detergent or
anti-bacterial soap and rinsed under a gentle stream
of cold water.
NOTE:
This unit is not designed for complete submersion or
washing in water.