1
3. Nomenclature
4. Instruction manual
4.1 Mount the alkaline batteries
：
a) Mount 3 AA alkaline batteries into the battery box according to the polarity indication shown in the battery box.The
put the battery box back to the instrument.
b) Mount the rechargeable battery box directly to the instrument.
4.2 Charging the rechargeable battery
Plug the charger into the charging hole to charge the rechargeable battery box.When charging, the indication light is red,
and when finished charging, the indication light turns from red to green.
You can also use power bank
（
portable power
）
to charge the rechargeable battery box.
Touching keypad
External power supply socket
Find adjusting hand wheel
Round vial
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