transparent without any color hue when it becomes wet. It is recommended to
shorten replacement interval if the silica-gel is completely transparent upon
replacement. If it is still yellow-orange, it is possible to prolong the
replacement interval.
Note:
The silica-gel ability to absorb moisture depends on the ambient temperature. If
the camera is located in the environment with below freezing point
temperatures, drying of the CCD cold chamber can take up to several days.
Illustration 20: Silica-gel container is accessible from the camera back side
Changing the silica-gel
The desiccant container design depends on the camera revision:
●
G3 cameras revision 1 have the container accessible from the back
side of the camera head. The slotted desiccant chamber cap can be
unscrewed e.g. by a coin. Pour out wet silica-gel and fill the chamber
with a dry one. The desiccant chamber can be filled with a hot silica-
gel without a danger of damaging of the container.
The desiccant container can be left open without the fear from
contamination of CCD chamber interior by dust. There is a very faint
stainless steel grid between the CCD chamber and the desiccant
container, so dust particles cannot enter the chamber itself. It is even
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