European Southern Observatory New Technology Telescope

General :
Observations :
Operations :

RILD Focussing

RILD Focus must be check at every setup.
It need pinhole to be mounted.

• If not::
  • Press EMMI emergency stop button at the center of EMMI cover.
  • Remove the red side cover of EMMI :
  • From the EMMI configuration panel, select a free starplate position and click "move to load".
  • Install pinhole in position.
  • From EMMI configuration panel, select click enter starplate .
  • Click Backup under File submenu.
  • Release the emergency stop button.
• Run RILD_img_tec_SetFoc.
• When finishing it will pop up a menu pproposing to change or not the
  focus formula constant term ( focr best focus encoder position at 0 degrees C )
  Only accept it if the focus curve in midas graphics window looks OK and the
  difference between old and new values is less than 100 and more than 10.
  [ last reference around 620 e.u.]
  
• If this difference is steadily more than hundred , report to EMMI instrunment nucleus.

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