Ceyear 2498D User Manual - Page 5

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2)
However, it has self-discharging phenomenon. If the battery is stored at low voltage for a long time,
it may damage the internal structure and shorten the service life due to self-discharge. Therefore, the
lithium batteries should be charged every 3 to 6 months if they are stored for a long period of time.
3)
The lithium battery is a built-in battery and is stored along with the machine. The storage
temperature ranges from -10 °C to 40 °C.
4)
To ensure the safety of charging, the internal lithium battery has a charging temperature range of
-10 °C to 55 °C. If the ambient temperature exceeds this range, it will automatically terminate the
charging.
3.3 LCD display screen
1)
Do not use a sharp object to click on the LCD screen, nor forcefully strike the LCD screen.
2)
Do not drop organic solvents or contaminants on the LCD screen, such as acetone, oil, antifreeze,
grease, etc.; otherwise, the LCD screen may work abnormally.
3)
Wipe and clean the LCD screen with a silk cloth or a soft fabric.
4)
The brightness of the display will vary depending on the viewing angle of screen. There may be
some black, red, blue or green dots on the screen. These are not the faults of LCD displays and are
natural phenomena.
3.4 Use of optical power meter
1)
The meter should be prevented from mechanical vibration, collisions, drops and other mechanical
damage.
2)
Light emission and receiving sockets should be protected to prevent hard objects and dirt from
coming into contact. If it is not used, please cover it with dust cover to prevent dust or other harmful
gases from eroding.
3)
Before storing, this meter should be packaged first, placed in a ventilated and dry room, and kept in
a special box when transported.
4)
Clean the fiber jumper face with absorbent cotton and absolute alcohol before use.
We sincerely hope that China Electronics Technology Instruments Co., Ltd. can help you work more
conveniently and efficiently, and we welcome you to contact us, thus bringing higher benefit for you.
Chapter I Overview
2