HTC 21-S Посібник користувача - Сторінка 28
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3
Remove the old battery and install the new battery
according to the polarity of the battery marked in
the battery box.
4)
After installing the new battery, cover the battery
cover and lock the screw.
Warning
•
To avoid the possibility of electric shock or personal
injury caused by incorrect reading, replace the
battery immediately when the "
on the display screen.
•
Please use the same type of batteries, do not use
substandard batteries.
•
In order to ensure safe operation and maintenance
of the instrument, please take out the battery when
not in use for a long time, in order to prevent
damage to the product caused by battery leakage.
25
" sign is displayed