English
77
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Appendix
Ⅰ：
Lightning-proof
、
with surge-protector
This series products adopt electricity-generating tube through air and TVS board lighting-proof
technology to avoid damage to the equipment caused by various pluse signal, such as thunder or surge
under the 1500W. Meanwhile, be sure to make it safe and take effective measures when you install it
ourside the house according to the practical situatio.
There must be at least 50m between singal transforming line and high-voltage equipments or
high-voltage cables:
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Outside routing should be under the eave spout.
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Sealling steel pipe-burying(routing) is essential to the spacious area. One side of the steel pipe
should be connected to the land. And impracticable routing method is forbidden.
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You have to take some meatures in the area of strong lightning or high-voltage area (such as
transformer substation with high-voltage), such as install large power consumption
lightning-proof equipments as well as lightning rod
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Outside installation and lightning-proof / grouding design of the circuit must be compatible with
the lightning-proof requirement of the building. Moreover , it has to comply with the national
standardization and field requirements;
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The system should be equipotential earthing.The grounding equipment must be content with
the double requirements of the electric safty and anti-disturbance, and can’t be connected with
the earthing line (zero voltage) disorderly. The resistance should be less than 4
Ω
and the
conducting wire’s section area less than25
㎜
² while connecting the groud separately
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Appendix
Ⅱ：
Clearance of Transparent Housing
To ensure clear image,down-cover should be cleared regularly.
To avoid connecting it by your hand directly,you have to hold the external-loop of the down-cover
steadily while cleaning. The acid sweaty-trace of your hands may corrode the surface of the down-cover
and if it is damaged by the hard things which will cause unclear picture, influence the picture quality.
Be sure to clean the surface by soft cloth or other substitutes
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The medium-sized detergent is essential when it is dirty seriously and any clearance products of
high-level can be available!
Appendix
