DRAFT FOR COMMENT

Operations Engineering Procedures

Troubleshooting: In performing the procedure listed below; consult the Troubleshooting Section is this manual if you encounter problems and errors. Contact a day staff member if the problem/error is not covered in the Section, or you do not understand the fix or work-around instructions.

I. Dome Enclosure Chiller Startup and Monitoring

a. From the SPS GUI, note the mean truss temperature and then note the outside temperature using the Mt. Fowlkes weather GUI. If the two temperatures are within two degrees, you do not need to run the chiller, assuming it is not already on. Otherwise, using a smoke xterm, set the chiller temperature using the command ahu temp xy.z, where xy.z is a number. Typically, set the temperature to be about one or two degrees below outside temperature. Then command the chillers to power up using the jcon on command.

b. To turn the chillers off, use the command jcoff.

II. Structure Air Supply Startup

a. Enter the Krabbenhut; go to the compressor equipment at the back.

b. On the Quincey air compressor control panel, check that the diagnostic fault lights will all illuminate by pressing and holding in the white button. If any do not illuminate, contact a member of the daystaff engineering team; follow any instructions you are given or await his/her arrival.

c. Release the large red STOP button by twisting it counterclockwise and pulling outwards.

d. Press in and hold the green START button until the compressor starts. Wait for the pressure to reach 750 kPa by monitoring the pressure gauge.

e. Go to the air dryer (to the right of the compressor), reach up to the valve handle, push it fully upward, and then push the red START button. A green light should illuminate.

III. Exterior Visual Inspection

Perform a walk-around inspection of the HET exterior. Look for any signs that something may be a problem for the safe and effective operation of the telescope. Check for obviously malfunctioning equipment, leaks, low fluid levels, debris, and fallen or broken equipment. Check these items in particular:

a. GTAG building (doors locked? Keys are located on the key rack inside the Control Room electrical closet)

b. Chiller plant and pumps

c. Glycol pump enclosure and pump, glycol fluid tanks

d. Emergency generator

e. Air handling units

f. Heat pump

g. Doors at the receiving dock at the basement level of the HET enclosure (doors should be locked at all times, unless items are being moved in or out.)

IV. Software startup

a. Log on to jove with the username guider and the appropriate password on monitor number 1.

b. Bring up a smoke xterm by right-clicking the mouse, then selecting smoke from the pulldown menu (under xterm).

c. In the smoke window, enter the command startwork. This will bring up the main PMC and SPS GUIs. The T.O. will bring up the additional GUIs needed from these first GUIs.

d. Change to an adjacent desktop on monitor 1. Right-click the mouse to bring up the main pulldown menu, and select SAMS. First, select Start SAMS server; when this GUI comes up the server begins an initialization process that takes several minutes to complete. When complete, a pane at the bottom of the GUI will show running main application loop. At this point, go again to the SAMS pulldown menu and select Start SAMS GUI, and this GUI should appear.

e. On monitor 3 right-click the mouse to bring up the main pulldown menu, scroll down to MARS-HEFI , and bring up the pulldowns under this; select these: Start MARS-HEFI System, HEFI Interface, and HEFI Light Source. When the MARS GUI appears, press the ON radio button to start the AOA Wavescope program and another ON button to turn on the MARS stage motors.

f. On the Wavescope monitor (the rightmost monitor), double-click the mouse with the pointer on the Wavescope icon to bring up the Wavescope GUI.

g. On monitor 3, bring up the Mt. Fowlkes and Mt. Locke current weather GUIs by bringing up the pulldown menu and scrolling down to Weather and selecting both GUIs under this heading.

h. Bring up the Dome/Shutter Automation Software (DAS) by right clicking on Dome under the main pulldown menu. Bring up the DAS GUI only. Do not restart the DAS server software unless you know it is down.

i. Restart SPS on sandmann right clicking on VNC under the main pulldown menu. Enter the password. The SPS GUI should appear. Exit this software, wait a few seconds, then restart the software by doubleclicking on its icon.

j. On another desktop on monitor 3, bring up Netscape and go to the bookmarked site for NOAA's Southern Region Headquarters. Click on the Midland, Texas sector on the U.S. map and then select the eastern half of Jeff Davis County to bring up the weather page that applies to the Observatory. Read the forecast for that night and also look at the radar image and satellite image. Note any bad weather that is impending or likely for the evening.

V. Glycol Startup

a. Turn on the glycol coolant pump. The control panel (MagneTek) is located in the Control Room electrical closet. Press the blue RUN button to turn it on.

b. Check to see that the glycol flow rate is about eight gallons per minute by looking at the meter on the HET Dome-Computer Interface box at the bottom of the instrument rack at the right of T.O. Consoles.

VI. HET Enclosure Interior Visual Inspection

a. Examine the dome floor for water puddles, fluid leaks from the tracker assembly, and anything that may have fallen from the tracker or truss. After a heavy rain, it is not unusual to see some small water puddles on the floor. Also, during times of cold temperatures a small amount of glycol can leak from the hose fittings within the pier ring and along the cable wrap assembly.

b. Inspect the spectrograph room, the lower and upper electrical rooms, and the mezzanine for anything unusual.

c. Report abnormal findings to the T.O., or contact a daystaff engineer.

VII. Operational Tests – Dome Rotation and Dome Shutter

a. Using the dome and shutter control software, command the dome to rotate 360 degrees, either clockwise or counterclockwise. Watch the dome move from outside, looking and listening for anything unusual.

b. Now command the dome to move 360 degrees the other direction, and repeat your observation, as above.

c. Weather permitting, test the operation of the shutter.

VIII. Guide Cameras and PFIP Slide Operational Tests

a. Bring up a baffle xterm on one of the monitors by selecting the xterm menu item from the main pulldown menu. Enter the password when prompted.

b. Home the PFIP slide by entering trans h (or th) at the prompt. After a few seconds check the status of the slide by entering trans z (tz). If operating properly, you should see returned a message saying the slide is at position 2, 0 plus or minus 300.

c. Move the slide to the LRS position by entering trans@1 (t1) Using trans z again, check the slide's position and status. The position should now be 1, a position number, and a message stating home switch is on cam.

d. In a jove xterm, test the HRS acquisition camera. Enter acqcam z. If the communications link is functioning properly, you will see a message similar to:

Motor 0 status

motor is off

motion complete is on

thermal cutoff is off

negative limit is off

positive limit is off

position is 10500 (this number will vary)

e. Repeat d., above, for the LRS guide camera using the command lrscam z. If all is OK, you will receive a similar message, except for the motor status line, that should display Motor 1 status.

f. Test the operation of the LRS camera. Open an alice xterm, and enter lrs -tcs. After the camera GUI comes up, select an exposure time of 0.1 sec and then take a single exposure. If working OK, you will see light (no image of anything) in the image display.

g. Repeat the above for the HRS acquisition camera using the command acq -tcs.

IX. TCS Bringup and Tracker Initialization

a. On monitor 4, bring up the main pulldown menu, go to TCS-crockett, and select PMAC State Monitor from its menu.

b. Repeat the above, but select Crockett TSS this time.

c. In the crockett window, enter the command tss. When prompted, press and hold the black power on button, located in the instrument panel rack adjacent to monitor 5, for one second, then press the Enter key on the keyboard.

d. After tss is running, repeat a., above, but now bring up the TCS GUI. The main GUI will appear, and several fault warnings will be flashing red. A smaller window will then appear. You will see the choices of performing a normal initialization, a full initialization, take control of the tracker, enable structure automation, and enable dome automation. Unless conditions require the just take control of the tracker option, select Initialize normal search for the tracker. In all cases, also select Enable structure automation. After a few moments the flashing warnings should shut off. If not, consult the appropriate troubleshooting section in this manual, or contact an engineer.

e. In the crockett window, note the tracker's position. It should be at, or near, the center (i.e., X ~ 0 and Y ~ 0). If not, slew the tracker to the center position using the Tracker Position GUI (under the Tools menu in the TCS GUI.

f. Using the Tracker Position GUI, set the tracker's new position to be offset from the center, but not by much. Then Track to this position (not Slew!). This will release the brakes so the tracker can be initialized.

g.. Under the Tools menu, select Initialize Tracker. Select Initialize: Search for a full initialization.

h. After all the initialization indicators have gone from yellow to green, look at the crockett window and observe the positions for UX (Upper X) and LX (Lower X). These will likely be different and changing. When the positions show very nearly equal numbers and have stopped changing (except to the second or third decimal place), close out the initialization GUI and click on the TCS Abort button.

i. Under Next in the TCS GUI, scroll down and select CCAS. Answer yes in response to the GUI that pops up asking if you are sure you want to go to CCAS. The structure should then rise up on the air bearings, move to the CCAS position, and set down.

X. Calibration Screen Operation

a. Ensure that the dome audio system is ON and that volume is turned up enough so that you can hear the calscreen petals open and close.

b. Go to the RA console. The calscreen control box is located to the left, on top of the instrument rack.

c. Flip the control switch to the IN position. If operating correctly you will hear the petals fall into place.

d. Flip the switch to the OUT position. You should hear the petals move out as well as the hiss of high pressure air.

XI. Open Dome

a. Verify that no personnel or equipment safety hazards exist in the dome as a result of opening the shutter and louvers.

b. If the chillers are on, turn them off using the jcoff command in the smoke xterm window if the mean truss temperature is within two degrees or so of the outside temperature.

c. If you are certain that the weather is not a threat to the safe operation of the HET, open the dome shutter using the dome control software GUI (brought to display via the KVM-switched monitor at the far right of the T.O. set of consoles).