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As most users know, CCD detectors are very fragile and expensive
items. In fact, our TI chip cannot be replaced at any price.
Fortunately, once the CCD is installed in a cryogenic dewar [A] it is
relatively sturdy. The observer must follow the following
precautions, or face both self-destruction and chip destruction:
- NEVER let air into the dewar! Never play with the valve
on the rear of the dewar! Explosive destruction (of chip and
astronomer) will result!
- NEVER disassemble the dewar or the electronics box that is
attached to it (the camera head box). NEVER separate the camera
head box from the dewar.
- NEVER disconnect or jiggle any cables unless the CCD
power supply and CCD controller are off. (Total of two toggle switches.)
Pat Hall - Wed Oct 4 11:02:37 MST 1995