QHYCCD QHY27M, Руководство пользователя

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QHY27/28/29M
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7 FAQ
1. How to avoid the camera hanging?
If you camera always hangs. It may be caused by many reasons. You can check the following things.
1.1 If there is power leak for your mounts and computers? The power leak may cause the leak
current transfer from computer to the camera via the GND. This may affect the USB transfer and
causes the data packet lost and cause it hang. You need to make sure the computer and the mount
is well grounded.
1.2 If the USB port's voltage not enough? Some computer's USB port +5V is not enough. It may
cause the camera always hangs. In this condition you can use a powered USB3.0 HUB to connect
camera and get the good +5V power for camera.
1.3 If the USB cable connection is good enough? Sometimes the contact issue in the USB cable to
camera or USB cable to computer will cause the signal loss and cause camera to hang. Especially
when you move the cables. In this condition. You can try to add a little silicon oil into the USB
socket/plug .This can increase the contact a lot better.
1.4 Avoid the statics. Sometimes the static electricity on human body will cause the camera to hang.
You can touch the computer metal case for first before touch the camera to let the static electricity
on your body release.
1.5 Some computer's front USB port is not so good for high speed transfer (The reason is it
connected to mainboard by a cable and which has no good signal integrity). If you found the camera
always hang on front USB port. You can try the USB port on backside of the computer (which is
connected to chipset directly on the mainboard).
2. How to clean the CMOS sensor and the optic windows of the camera?
If you found there is dust on the CCD sensor. You can screw off the front part of the QHY29M. The
QHY29M's CCD sensor has the AR coating so you need to be careful to clean it. You can use the
clean kit for DSLR sensor to do it.
The optic window is the IR cut coating or AR coating. So you need to be careful when cleaning it.
You can also use the DSLR clean tools or the lens paper. Don't use strong force to clean it. The
coating is not so hard and it is easy to get scratch when you use strong force on it.
3. How to protect the cooler in QHY29M?
The cooler in QHY29M can lower the CCD temperature to a value that's almost 40 degrees
centigrade below the ambient temperature. So you need to be careful to avoid thermal shock,
which refers to when the cooler's temperature rises or fall dramatically, the cooler is subjected to
strong internal stress due to contraction principle. Drastic thermal shock can shorten cooler's
service life or permanently break it.
So when you begin to adjust the CCD temperature, you should avoid setting "Cooler Power" to its
maximum value, and you should gradually turn up the "Cooler Power" value. When you turn off