Instrument

NOTCam was warmed up and opened in October 2013. The clean room was prepared and cleaned for that work. Several parts in the filling and venting tubes were polished and refitted, and also several O-rings were changed. The pressure sensor was cleaned and re-installed and fitted with new O-rings. The sensor was compared with the sensor on the vacuum pump, and found to be in good agreement. The new KG2 (``red-leak'' cut-off) filter was installed, the 64 micron slit was taken out as it is not used and to make room for a mask that was reinstalled, a tremendous metallic dust speck was removed from the collimator lens, and the instrument entrance window was wet cleaned with propanol.

It was found that switching on the buzzer that warns when the shutter does not work properly, caused the temperature reading of the instrument to give false readings. The receiver chip (26LS32) in the buzzer box was replaced, which fixed the problem.

A full review was made of the NOTCam calibration plan, and a new version was sent around for comments.