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8. Cleaning and Protection
Attention: Do not use any corrosive detergent to clean the device, so as not to damage the
device surface.
8.1 Clean LCD displayer
You need to clean the LCD screen if it’s too dirty to see the visual chart clearly.
1) Cut off power.
2) Unplug the power cord from the socket.
3) Wipe the LCD screen with soft and clean cotton cloth or absorbent wool gently.
Attention: Cut off power and unplug the power cord from the socket before cleaning.
Otherwise, it may cause electric shock.
Attention: Do not wipe the LCD screen with stiff cloth or paper; otherwise it may scratch the
screen.
Attention: Make sure not to leave water drop on the LCD screen; if there is a water drop, please
wipe it away with soft and clean cotton cloth or absorbent wool.
Otherwise, it may leave a stain on the LCD screen,
Attention: Wipe the LCD screen gently when cleaning it. Otherwise, it may cause device
failure.
8.2 Clean external parts
When the external parts, such as the enclosure or panel, get dirty, please wipe them gently with clean
and soft cloth.
For intractable stains, please dip the clean soft cloth in mild detergent to scrub the stains away and
then wipe it with dry soft cloth.
