QHYCCD QHY8L - Manual (Page 6)

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DC201 Input Voltage Range
The DC201 requires a regulated 12V input. The
normal input range is 11V-13V. If you exceed
13V- common when you are using an external
battery, the higher voltage will reduce the life of
the TEC and Fan. If you exceed 13V, please limit
the maximum power of your Cooling Settings. This
can be controlled via“TEC
PROTECT” in
the“Favorite” menu of EZCAP. Please select it. If
you are using the ASCOM driver, this has been
set automatically.
QHY8L’s power is from 3.6W to 30W, which is
depended on the TEC’s PWM power. So the
power supply should be larger than 4A.
QHY8L use the one-stage TEC, the temperature
can be cooled below 30 degree centigrade by the
surroundings. It should be used the special
DC201 for QHY8L.
Service Temperature and Humidity of Camera
Service Temperature of this camera is from -20C/-
4F to +30C/86F.
Relative Humidity amount is from 0% to 90%.
What if dew forms on the surface of CCD chip?
How to avoid CCD sensor moisture in high
humidity environments
In certain environments, when the
temperature of the camera drop below the
dew-point, dew or ice may form on the camera.
This is simply a law of nature. However, ice
and/or dew which form on the surface of CCD
chip or optic window will impact your images.
If dew or ice forms on the surface of CCD, the
water can flow onto the electric board, which
leads to short circuit or data corruption. It is
critical that you avoid dew or ice formation
during operation on the CCD chip.
The internal space of CCD camera is relatively
airtight. If dew forms on the surface of CCD
chip, this indicates that there is higher relative
humidity in the CCD chamber. You must dry
the chamber using the following method:
1. Screw off the air socket screw on front part
of CCD sealed chamber
2. Put fresh silica gel in silica gel tube. Before
putting silica gel, a small piece of cotton is
needed to create a barrier between the hole in
the tube and the chamber