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Mounting MOSCA

Valid from: December 18. 2002

  1. Lock the telescope by pushing the red emergency button in dome and place the Don't move the telescope sign on the TCS keyboard.

  2. Check the CCD window and blow off any dust/spiders/bugs with clean air. Note that the only way to remove "a bug with wings" or a spider during an observing run is to lower the instrument and remove the offending bug. (Don't shake the air bottles and don't hold them upside down.)

  3. If FASU is not mounted see Mounting the FASU and the ALFOSC.

  4. Roll MOSCA under FASU and align the yellow mounting mark.

  5. Before raising MOSCA off the trolley wheels use some long bolts (e.g. counterweight bolts), 3 or 4, to assist in aligning MOSCA with FASU, while you can still maneuver the trolley on its wheels.

  6. Once aligned, raise MOSCA and put in the correctly specified bolts, red, NO washer (don't screw into the places marked for the counterweight), and obviously replace the long bolts used for alignment with the correct ones.

  7. Mount the MOSCA counterweight holder at the position marked by black lines. Bolts: White without washers. White with red stripe in middle position.

  8. Put MOSCA counterweights on the holder (22.5 kg) and secure them using the big wrench. Remember to put on protective cover on the holder.

  9. Plug in the power cables for FASU and MOSCA. You will have to find one loose 220V power cable in the cabinet.

  10. The shutter cable: connect it from FASU controller to MOSCA controller (label shutter)

  11. Optical fiber: Connect it from MOSCA controller to the fiber link box (see the labels)

  12. The cable from the FASU MOXA black box to the FASU motor controller: Make sure it is connected to the FASU motor controller.

  13. The network cable: Connect FASU unit to the network switch on the rotator (if not connected already).

  14. Turn FASU and MOSCA power on

  15. IMPORTANT!!!! check that the FASU HANDSET is switched on the Remote position

  16. Balance the telescope and set the default focus

  17. Make sure that the Thermal Monitoring System - Alert Control is activated.

  18. Test that instrument behaves as expected, i.e. the bias levels are as expected Test the instrument preferably in the early afternoon in case there are problems to be fixed. Re-check the bias levels during the night or next morning.

  19. Run the quality test .

Updated by Tapio Pursimo.

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