QHYCCD QHY90A, Руководство пользователя

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QHY90A
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The picture below shows a typical defect column with low CTE or zero CTE. This is a defect column. You
have to use the some defect tools to remove it.
8. How to use the QHYOAG that the camera comes with?
QHYOAG-S and a M42 adapter come with the QHY90A. By six M3 screws you can install them.
The prism of the OAG may have a protect film on front surface. Please remove it before using.
You can use QHY5L-II-M as the guider. Please pay attention that you may remove the front part of QHY5L-
II-M to get the back focus short enough for this combination of OAG-S and QHY90A. If you are using other
guider. We are not guarantee the back focus is suitable for them due to the very short back focus of the
QHY90A.
The thickness of QHYOAG-S is 10mm and the M42 adapter is 3mm. So the totally back focus addon is
13mm. The QHY90A back focus is 33mm. So the total back focus with QHYOAG-S is 46mm.
9.
Camera Maintenance
Drying the CCD Chamber
The CCD sensor is located in a CCD chamber. This chamber is airproof and connect to the socket of the
silicone gel tube (drying tube) on one side of the case. If there is moisture and it causes the CCD sensor
glass to get dew. You can use the silicone gel tube (drying tube) included in the package to dry it.
Please put the effective silicone gel into the silicone gel tube. Make sure to put a small amount of cotton
inside to prevent the silicone gel get into the CCD chamber.
The process of drying usually needs 24 hours.
Avoid CCD chamber optic window get dew
If the environment humidity is very high, the optic window of the CCD chamber may get dew. The QHY90A
has the build-in heat board on this optic window to heat the optic window to avoid it. In most conditions it
can take effect.
If the optic window still get dew please try the following method.
1. Avoid directing the camera to the ground. The density of the cold air is greater than the density of the hot
air. If the camera is facing down to the ground, the cold air will more easily contact the glass and cause it to
cool down and condense.
2. Increase the temperature of the CMOS sensor. You can increase the temperature of the CMOS sensor
slightly to prevent fogging of the glass.
3. Check whether the heating plate is working. If the heating plate is not working, the glass will be easily
fogged. Generally, the temperature of the heating plate can reach 65-
70 ° C in a 25 ° C environment. If it is
not so hot, it may be because the heating plate is damaged, you can contact us to replace the heating plate.