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The displayed value of the device will be locked, and then
to press the key again to release the reading hold.
4.2 Function Key
1) In diode, buzzer gear, press "SEL" key, the meter will
switch between on-off detection and diode two-file.
2) In frequency and duty gear, press "SEL" key, the meter
will switch between the frequency and duty.
3) In temperature gear, press "SEL" key, the meter will
switch between degrees Celsius and Fahrenheit.
Press HZ% key to switch between HZ and DUTY.
4) Press "SEL" key in AC voltage gear to enter the
frequency test status. This is the most convenient
frequency test for high-voltage signals.
4.3 Backlight and flashlight
1
）
During the measurement, if the ambient light is too dark,
which makes the reading difficult, press the “ ” key for
more than 2 seconds, turn on the backlight and the
flashlight, and turn off automatically after about 15
seconds.
2
）
If you press the “ ” key for more than 2 seconds
during this period, the backlight and the light will be turned
off manually.
Backlight and flashlight’s illuminator is LED which works
with large current. The meter has a timer circuit ( about 15
seconds, but the battery life will be shorten if backlight
and flashlight are used often. So don’t use the backlight
very often if not necessary.
