Technical data

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30
electricity net. When the system is grounded separately, the
resistance of down conductor should be ≤ 4Ω and the sectional
area of down conductor should be ≤25 mm
2
(refer to Picture 59)
Figure 31
Appendix Ⅱ: The Cleaning of Clear Down Cover
To obtain constant clear videos, user should clean the down cover
periodically.
 Be cautious when cleaning. Hold the down cover ring only to avoid
direct touch to the acrylic down cover. The acid sweat mark of
fingerprint will corrode the coating of down cover and scratch on
down cover will cause vague images.
 Use soft dry cloth or the substitute to clean the inner and outer
surfaces.
 For hard contamination, use neutral detergent. Any cleanser for
high grade furniture is applicable.