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Per il disseccante la procedura è questa:
http://diffractionlimited.com/wp-conten ... ual_12.pdfReplacing the Desiccant The ST-8300 contains a small packet of desiccant that keeps the CCD from frosting when it’s cooled. This desiccant should last for several years but it won’t last forever. If you start seeing things appear in your images
that look like shadowed tendrils you should suspect frost on the CCD and it may be time to replace the desiccant. You can get the replacement desiccant from us and it’s easy to replace with the following procedure:
1. Remove the camera’s front cover by loosening the four socket-head cap screws (SHCS) that hold it in place.
2. Remove the shutter or filter wheel by unscrewing the small Philips head screw and washer that holds it in place. Make sure you know which side goes up. With filter wheels it the side with the filters but with shutters you’ll have to keep track of it as they won’t work right if flipped.
3. Remove the CCD Cover/Window Plate by loosening the four SHCS that hold it in place.
4. Pull out the old desiccant pack and replace it with the fresh one. You may have to wedge it in there or fold the bag slightly to get it to fit.
5. If the CCD cover glass is spotted it is easily cleaned with a cotton swab and isopropyl (rubbing) alcohol. Dust here is very critical, so take care.
6. Replace the CCD Cover/Window plate, shutter and front cover.
7. Let the camera sit for 24 hours before cooling to give the desiccant time to equilibrate the CCD chamber.
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