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Siemens SIMATIC PG 720 Manual page 21

Programming device
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Note
Depending on the gray tone or color shade in the display, passive STN
displays are subject to varying degrees of interference known as the Moiré
effect. This is a physical characteristic and is not a fault.
Caution
!
Risk of injury!
If a display is damaged, liquid crystals may escape. Do not touch this liquid
or allow it to come into contact with your skin in any way, and do not breath
in the vapors. If you do come into contact with the liquid, wash those parts
of the skin affected immediately with alcohol, and rinse with plenty of water.
Then consult a physician immediately.
Use only a cotton cloth and a neutral cleansing agent to clean the display. Do
not use water or aggressive solvents (such as alcohol or acetone). Never
touch the display with hard, sharp objects. Avoid asserting any pressure on
the display surface.
PG 720 Programming Device
C79000-G7076-C720-02
Getting to Know the PG 720
3
3-7

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