European Southern Observatory New Technology Telescope

General :
Observations :
Operations :

The filters used on SUSI2 are circular with a diameter of 100 mm.

It is also possible to use circular filter of diameter 85mm , in which case a special adaptor cell has to be used , with variable flux loss in the field and vignetting. Check out the special rules at the end of this file.
 

1. Special rules for non-standard filters

• Rule 1- do NOT mount EMMI (or any) filters in SuSI unless approved by OPC or if there is a compelling reason (e.g funny object that has to be observe absolutely at high resolution in a special filter), approved by Team Leader or astronomer.
• Rule 2- if  filters have to be mounted in the SuSI's filter holders, only Gabriel Martin and the optics team can do it.

2. Installation Procedure

• Press Rotator A emergency stop button at the right side of platform A .
• Get the boxes containing the filters you want to mount and the magnet tool from SUSI2 filter red cabinet.
• Watching at co-rotator rotate carefully Rotator A until integrating (yellow) sphere is on the right side .
• Unscrew the knob on left side of SUSI2 horizontal cover and open it.
• Start SUSI OS from INS start mouse button.
• If this fails startup fcd.
• Start SUSI config panel from INS submenu.
• On the SUSI2 configuration panel, select filter pos and click move to load .
• Stick the magnet on the side of the filter housing ring and gently pull until you can seize the ring by hand : store it in its box and screw in the lid.
• Mount the new one with label outside . If a filter is dusty clean it with some pressurized CO2.
• Store removed filter into red cabinet.
• Release the emergency stop button.
• Declare the new configuration in the SUSI2 configurarion panel.

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