Cleaning - ZWO ASI120MM Manual

ASI120 Manual

8. Cleaning

The camera comes with an AR or IR-CUT protect window, which can protect the sensor from dust
and humidity. Should you need to clean the sensor, it's better to do so during the daytime. To see
the dust, you just need to setup your telescope and point it to a bright place. A Barlow is required
to see these dusts clear. Then attach the camera and adjust the exposure to make sure not over
exposed. You can see an image like below if it's dirty.
The big dim spot on the image (at right ) are the shadows of dust on the protect window.
The very small but very dark spot in the image (at left) are the shadows of the dusts on the sensor.
The suggested way to clean them is try to blow them away with a manual air pump. To clean the
dust on the sensor you will need to open the camera body. Simply screw off the cover by hand in a
counter-clockwise direction.
Keep in mind that the sensor is an optical device and all precautions must be taken to prevent dust
or scratches on the input window. If there is dirt that doesn't come off with the air pump, here are
the steps to clean it.
Equipment
• Ethanol.
• Cleaning medium (wipes, optical paper, cotton buds).
• Filtered blow-off gun (preferably with static charge neutralizing capability).
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