If Cold Cycle Refrigeration CCR) system is running, i.e. NIRSPEC is COLD, then follow ALL steps in the procedure.

If NIRSPEC is WARM and the CCRs are off, then you may omit steps in blue lettering.

Be expeditious while the CCRs are off: Turning off the NIRSPEC CCRs provides approximately 10 min before the dewar vacuum pressure reaches an unacceptably high value. At that point, either the CCRs need to be powered on or a vacuum pump needs to be pumping on the dewar. Otherwise NIRSPEC will lose vacuum completely and will need to be warmed to ambient, pumped, and then cooled back to operating temperature, a 15 day process.

TOOLS

• Stopwatch
• CCR wrench kit from the NIRSPEC shelf in the instrument lab.
• 1 40 ft. extension cord.
• 1 power strip (may be connected to the vacuum pump.
• Tools to remove the AO threshold.
• 1 Wire cutter.
• 1 TOSS 50 vacuum pumping station w/:
• 1 KF25 - KF40 adaptor
• 2 lengths of KF40 vacuum tubing
• 2 KF40 O-rings and clamps

PERSONNEL

• 1 person to operate telescope controls, switch cables in the computer room, start/stop CCR compressors.
• 2 people at Nas Deck level to move the NIRSPEC handler and vacuum pump and disconnect/reconnect cables.
• 1 person at Nas Deck level with stopwatch to keep track of time and monitor vacuum pressures and read procedures.

TIME

• About 2 hours total. Typical time with CCRs off is 15-18 minutes.

COMPUTER ROOM

• Log on to Sun workstation "kua" as user "nspeceng".
• From the workspace pulldown menu, choose NIRSPEC Control Menu->Stop NIRSPEC Server. This will shut down the server software.

RIGHT NASMYTH PLATFORM

• Verify that the CCR lines and CCR power can be uncoiled and connected quickly.
• Ensure that the cable boom tether is attached to the tension switch and the tension switch is connected.

TELESCOPE

• Move telescope in elevation above 45 degrees to clear Nas Deck elevation limit.
• Move telescope in azimuth to 10.8 degrees to roughly align Nas Deck handler position RT4 with AO enclosure door.

AO ENCLOSURE

• Remove AO door clip and open AO door from the outside.
• Remove AO door threshold. Stow threshold on the Nas Deck. Picture

TELESCOPE

• Fine align RT4 rails to AO rails

AO ENCLOSURE

• Open front right insulation panel on NIRSPEC and turn off main power breaker on Pulizzi unit. Picture
• Remove the floor grating by NIRSPEC allowing access to the gycol valves, etc. using a grating removal tool. Two people required.
• Shut off the gycol supply and return valves (supply first, then return), which are located underneath the access panels in the floor.
• Connect transfer cart power cord from RT4 to NIRSPEC cart. Picture
• Jack NIRSPEC up off the kinematic mounts by pressing and holding the "up" button on the side of the handler until the screws stop automatically.
• WARNING: DO NOT REMOVE CCR HOSES OR CCR POWER CABLE YET. Disconnect only the following cables.
• Disconnect FO1 & FO2 (transputer fiber optics) from the NIRSPEC Connect Panel [NCP], J2 & J1.
• Disconnect NIRSPEC AC [AOAC] power cable.
• Disconnect the Glycol supply and return lines from the NIRSPEC Cooling Panel [NIRSPEC-Cool].
• Mount and connect TOSS 50 vacuum pump and vacuum gauge to NIRSPEC. Provide 40 foot long AC power extension cord to pump from NAS Deck connector panel commercial AC outlet. Start pumping the line only, leaving the vacuum valve closed. Ensure vacuum line is pumped below 1x10-3 Torr before proceeding.
• Unplug the NIRSPEC vacuum guage from NIRSPEC commercial power and plug it into the extension cord/power strip. Verify that the vacuum is being read
• Obtain a stopwatch.
• Ensure the rack and rail, kinematic mount and fairlead areas are all clear of obstacles.

COMPUTER ROOM

• Verify that the telescope does not have any handler interlock faults by switching telescope drive power on at the MCP, If the power comes on, there are no Azimuth interlock handler faults present.
• Switch the telescope drive power off.

MECHANICAL ROOM

WARNING:

Be expeditious: You have approx. 10 minutes on the stopwatch to get NIRSPEC CCR lines hooked up on RT4 near the right Nas Platform and the compressor started. Designate one person responsible for calling out stopwatch readings and recording the dewar vacuum every minute. If the vacuum inside the NIRSPEC dewar exceeds 1x10-3 Torr, check that vacuum pump is on and that vacuum line is pumped down below 5x10-5 Torr, then open the vacuum valve on NIRSPEC and begin pumping on dewar.
 
• Shut off the NIRSPEC CCR compressor.
• Immediately inform the crew in the AO house that the compressors are off.

AO ENCLOSURE (in parallel with the following tasks in the Computer Room)

• Immediately start the stopwatch and begin recording dewar vacuum readings every minute.
• Disconnect supply and return CCR lines from the NIRSPEC connect panel [NCP] using the tools in the CCR tool kit.
• Disconnect CCR power cable AOCCRAC from NCP, JS1.
• Drive NIRSPEC handler to RT4 on the Nasmyth Deck..
• Close AO door and clip shut.

COMPUTER ROOM (in parallel with the above tasks in the AO enclosure)

• Disconnect CCR Power Cable PS1 from NIRSPEC Instrument Interconnect Panel [IIP-NP Left Nasmyth Platform], JS1.
• Connect CCR Power Cable PS1 to NIRSPEC Instrument Interconnect Panel [IIP-NP Right Nasmyth Platform], JS1.

TELESCOPE

WARNING: There is a telescope interlock on the cable boom. If the boom is not properly stowed, the telescope will not move at full speed. Do not release the boom until the telescope is lined up Right Nasmyth to RT4.

• Rotate telescope in azimuth to the RIGHT, to AZ=193.7 degrees to line up Nas Deck handler position RT4 with the Right Nas Platform NIRSPEC focus.

RIGHT NASMYTH DECK

• Unlock the cable boom deadbolt, located at the base of the boom.
• Release the cable ties to create slack in the cables.
• Connect supply and return CCR lines from boom to the NIRSPEC connect panel [NCP] using the tools in the CCR tool kit.
• Connect CCR power cable PS1 on boom to NCP, JS1.

MECHANICAL ROOM

• Power on NIRSPEC CCR compressor. Verify the gauge  pressure on the compressor is 128 PSI.
• Stop stopwatch and note the time and dewar vacuum for entry in the SIAS.

RIGHT NASMYTH DECK

• Note that once the CCR compressor is turned on, the CCR pressure gauges on NIRSPEC should read 315 to 325 PSI on the supply line and 125 to 140 PSI on the return line. Oscillation in the pressure is normal as long as the readings fall within the range specified.
• Remove Right Nas Platform kinematic mount cover plates.
• Monitor the NIRSPEC dewar vacuum. When it drops below 1x10-3 Torr, close the dewar valve if necessary, and disconnect the vacuum pump. Put a blank off on the NIRSPEC inlet port.
• Unplug the vacuum guage from the extension cord/power strip and plug it into a NIRSPEC commercial AC power outlet on NCP.
• Drive NIRSPEC handler to the right Nasmyth focus position. Carefully sheperd the boom cables and boom rotation. The handler will stop automatically over the kinematic mounts.

RIGHT NASMYTH PLATFORM

• Jack NIRSPEC down on to the kinematic mounts by pressing and holding the "down" button on the side of the handler. Monitor the lift pads on the module handler. They should lift slightly off of the handler frame, then stop automatically. If they fail to stop, release the "down" button. If the screws drive too far it could damage the lift mechanism. Additionally, monitor the front screw as it drives down into the kinematic mount. Ensure that it is seating properly in the hole. Picture
• Disconnect the handler power from the connector at RT4 on the Dec, and retract the cable back into the takeup reel on the handler cart.
• Lock the cable boom deadbolt, located at the base of the boom. Picture
• Connect the Glycol supply and return lines from the NIRSPEC Cooling Panel [NIRSPEC-Cool].
• Remove grating cover near boom and open instrument return valve (valve handle points toward the cable boom), then open the supply ball valve (valve handle points away from the cable boom). Picture
• Replace the grating cover near the boom.
• Connect NIRSPEC AC power cable on the NIRSPEC glycol panel.
• Connect the transputer fiber optic lines as follows: FO2 to NICP-J2 & FO3 to NICP-J1.
• Connect the PXL Camera fiber optic lines as follows: FO4 to NICP-J4 & FO5 to NICP-J3
• Install CCR protection hoops.
• Set the silver toggle switch that controls the power to the internal flat field lamp (switch is on the top of the NIRSPEC Calibration Unit) to the Low Power position.
• Turn on NIRSPEC main power at the Pulizzi unit.
• Secure all cables on the boom with cable ties and velcro straps.
• Ensure that the cable boom tether is attached to the tension switch and the tension switch is connected.
• TEMPORARY: IN EFFECT 1 May 2001 Reconnect the air supply hose from the telescope to the regulator. The regulator is on or near the NIRSPEC glycol interface panel, and has small-gauge plastic hose coming out of it and going into the calibration unit. This hose carries the airflow for the dewar window purge.

TELESCOPE

• Move telescope to the left to reach an azimuth position where the AO door can be opened from the outside (AZ=10.8 degrees)

AO ENCLOSURE

• Unclip the AO door and open it.
• Install the AO door threshold.
• Install rack and rail floor panels in the correct order inside the AO enclosure.
• Secure all AO/NIRSPEC cables under the interface access hole.
• Install instrument interface access hole floor panel. Picture

CONTROL/COMPUTER ROOM

• Disconnect FO14 & FO15 (transputer fiber optics) to the NIRSPEC Instrument Interconnect Panel [IIP-NP], J2 & J1.
• Connect transputer fiber optic lines to the NIRSPEC Instrument Interconnect Panel [IIP-NP] as follows: FO14 to J14, and FO15 to J15.
• NOTE that the PXL fiber optic lines are not normally moved. Verify that PXL line FO17 is connected to J16, and that PXL line FO18 is connected to J17. If not, connect PXL camera fiber optics lines to the NIRSPEC Instrument Interconnect Panel [IIP-NP] as follows: FO17 to J16, and FO18 to J17.
• Verify that the "link active" light is lit on the SCSI/Fiber Extender "Black Box" labelled "NIRSPEC TRANSPUTER" (located adjacent to the NIRSPEC host computer waimea). If the "link active" light is dark, cycle power to the Black Box. If the "link active" light remains dark, check that the fibers are correctly connected.
• Log on to Sun workstation "kua" as user "nspeceng".
• From the workspace pulldown menu, choose NIRSPEC Control Menu->RUN NIRSPEC SERVER.
• From the workspace pulldown menu, choose NIRSPEC Control Menu->Check server processes. If the NIRSPEC server is running, 3 processes should appear in an xterm.
• Type any key to dismiss the process window xterm.
• From the workspace pulldown menu, choose exit...

For Instrument Scientist: CONTROL ROOM or ELSEWHERE WITH NETWORK ACCESS

• Log in as user "nirspec" on the NIRSPEC host computer waimea, and edit the .cshrc file to COMMENT OUT the line:

  setenv NIRSPEC_AO

• Log in as user "nirspec" on the Remote Ops 2 Observer's machine hanauma, and edit the .cshrc file to COMMENT OUT the line:

  setenv NIRSPEC_AO

last modified: D. Sprayberry 12 January 2001