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lightened for approximate 30 seconds, the back light
will automatically turn off.
When Using External Power
When the meter is powered using an external AC
adapter, once the back light is turned on, it will stay at
its maximum brightness continuously and will not
automatically turn off. Unplugging the external power
to use battery power, the back light will decrease its
brightness and automatically turn off.
Charge Display
The power circuit of TH2822/A is non-rechargeable.
When the external power adapter is plugged in, the
power mode will automatically switched and the
battery power circuit will be cut off.
TH2822C is equipped with rechargeable circuit. When
the external power adapter is connected, the built-in
rechargeable battery will be charged automatically
and the power mode will be switched to external
power supply.
Single charge circle is about 80 minutes and charge
current is approximate 40mA. If a battery is full
charged, the charge will be automatically shut off;
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