Cleaning And Maintenance - Dahua A5A21M/CG9 User Manual

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Cleaning and Maintenance

This chapter mainly introduces cleaning and replacement of color filter.
We have installed a fully transparent protective glass for the mono camera with the main
purpose to prevent dust falling on the surface of image sensor. The color camera is
equipped with a low-pass filter that cuts off to the near-infrared band. If you have
special requirements, such as not using a color filter or using another light-transmitting
filter, you can replace the entire filter mount of the image sensor (no need of removing
the cover) .
If the surface of the filter needs to clean, We recommend using the special cleaning
agent for optical devices that can clean the surface without leaving a mark.
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