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Warm Startup / Jan 27, 2018 / P Gabor | ✔✘ | |
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Assuming there is time to turn the thermal system on for a couple of hours before opening VATT | ||
Basement | Check dry air supply system dew point (typ. ~ -47) | |
Basement | Turn on building & pier fans | |
Dome | Open dome register vents (there are four of them) | |
Dome | Open dome shutter (slit) manually: plug dome into the power socket (note on safety: this ensures dome short is out: tether attached to cord); operate the dome shutter by turning the control button on the electric box on the silo wall to the SE | |
Dome | Open West door (leading to ladder to the roof) and wedge it in the fully open position | |
Control room | Turn on the main dome fan (green button on a strip to the right of the SW balcony door) | |
Dome ventilation running | ||
Even at wam startup it is prudent to reboot VATTEL and M2 PI Controller | ||
Control room | Kill the TCSglue; make sure M2 Controller is disconnected; kill all GUIs (if any) | |
TCS room | Turn M2 PI Controller off | |
TCS room | Reboot VATTtel: press tiny “Reset” button, wait for the green “Run” and “Pass” LEDs, and for “Guider OK” on the monitor | |
TCS room | M2 PI Controller will need to be turned on later | |
Control room | MOUNT CONTROL tab: Turn cell fans “ON” | |
Silo 2nd lvl | NESLAB: Check coolant level | |
Silo 2nd lvl | NESLAB: Simultaneously: toggle fron panel ON/OFF switch to “ON” & slowly raise manual valve lever (to minimize vibration) | |
Silo 2nd lvl | NESLAB: Also simultaneously: watch pneumatic-actuated valves “OPEN” | |
Silo 2nd lvl | NESLAB: Check pressure gauge (usually well above the nominal 60 psi) | |
Control room | MOUNT CONTROL tab: Wait for “NESLAB is On” to appear | |
Control room | @ VATTCONTROL (console) (follow this procedure only if VATTTEL is already booted) | |
Control room | Start APPS ⇒ VATT ⇒ TCS_GLUE | |
Control room | THERMAL tab: note temperature differential (strut & mirror) | |
Control room | THERMAL tab: radio button “ON” (do not use setpoint; setpoint to be used EXCLUSIVELY to change mirror temperature fast in time-critical situations; CLOSE SUPERVISION REQUIRED) | |
Themal system running | ||
In immediate preparation of opening | ||
Dome | Start filling science camera dewar with LN2 | |
Dome | Fill out LN2/camera log – listen for full dewar, cease flow when dewar is full | |
Dome | Check dome shutter is plugged into the wall power socket | |
Dome | Turn on power supply of finder telescope camera (on top of box on South side of East fork) | |
Dome | Open finder telescope objective cover (CAUTION: check for snow on dome shutter if needed) | |
Dome | Check derotator rotation is at “home”/startup/init position and cable wrap is not twisted | |
Dome | SBIG guider camera power supply (mounted on upper SW side of homed guider): Turn power “ON” | |
Dome | Disconnect LN2 filler hose from camera dewar, move storage dewar off of telescope platform and south, to dome silo wall) | |
Dome | Remove camera ground wire and clip it on silo, near storage dewar | |
Dome | Disengage stow pins, note telescope is south heavy if mirror cover is closed (which it should be), and must be raised slightly in elevation towards zenith with hand pressure, until marks align. Failure to do this usually binds stow pins, resulting in failure of pins to fully release. | |
Dome | Check azimuth axis “home” (pointers best visible from lower level by the entrance to dome) | |
Dome | Check AZ hard stop flippers are showing green sides north. | |
Dome | Close and lock West door (leading to ladder to the roof) for safety reasons (a person on the roof could get swept down by the rotating dome's shutters) | |
Dome actions done | ||
Basement | STEP ONE (labeled as such): Pull out red switch, upper left corner of control box | |
Basement | After recirculation pump starts, check flow meter by oil tank | |
Basement | Check that one chiller is “ON” (green indicator) (alternates between chillers #1 & #2, each on/off cycle) | |
Basement | Check oil temp set point (61 F) | |
Basement | Check oil temp actual (should rise immediately after recirculation pump starts, then settle at or very slightly above set point) | |
Basement | Check oil level light “OK” (if it's going to go out because of low oil level, it will do so after recirculation pump and/or pressure pumps have been started. May come back on after more running, as oil returns from azimuth bearing) | |
Basement | STEP TWO (labeled as such): Rotate pumps switch clockwise to “ON” | |
Basement | Check low side (feed pump) pressure rising | |
Basement | WAIT FOR HIGH PRESSURE PUMP TO START | |
Basement | Check high pressure side: pressure and flow “OK” after running awhile | |
Basement | Hydrostatic bearing oil system on | |
Basement | USE HEARING PROTECTION PROVIDED IF STAYING TO OBSERVE OPERATION OF PUMPS (muffs are by light switch) | |
Basement actions done | ||
TCS room | M2 PI Controller: turn on | |
TCS room | Toggle power switches “ON”: AZ, EL, DEROTATOR & DOME amplifiers (should see some AMPERES on dome amp readout). DO NOT POWER UP COUNTERWEIGHTS AMPLIFIER | |
Everywhere | Close building blackout shades | |
Control room | Turn off the main dome fan (red button on a strip to the right of the SW balcony door) | |
Control room | TURN ON ALL VIDEO MONITORS, dome flood (left of the SW balcony door) & intercom (volume “up” listening to Dome) | |
Control room | Start APPS ⇒ VATT ⇒ GUIDER_APP (look for SBIG emblem on video monitor) | |
Control room | Start APPS ⇒ VATT ⇒ XEPHEM | |
Control room | MOUNT CONTROL tab: Open dome shutter (slit), listen for sound of proper operation in intercom | |
Control room | MOUNT CONTROL tab: Open mirror cover, listen for sound of proper operation in intercom | |
Control room | MOUNT CONTROL tab: Enable drives (automatically releases brake) | |
Control room | DO NOT PRESS “Calibrate” on the MOUNT CONTROL tab!!! Could cause malfunction!!! | |
Control room | TCSglue main window: Turn on dome tracking by left clicking on the button displaying dome position | |
Control room | If needed, right mouse click on dome control button will open offset input dialog box. Enter inputs and watch dome movement (floodlight on). Kill dialog box. | |
Control room | Start New Secondary mirror GUI (icon bottom left) and follow instructions to start autocollimation | |
Control room | XEPHEM: Calendar NOW button: PRESS | |
Control room | XEPHEM: Update button (on bottom of dialog box): PRESS | |
Control room | XEPHEM: Calendar looping NOW button: PRESS | |
Control room | XEPHEM: Watch “N Steps” value decrease: 99999x | |
Control room | XEPHEM: “Data” menu: Load/delete local files | |
Control room | XEPHEM: Dialog box/“filter” field: ENTER PATH TO USER FILES | |
Control room | XEPHEM: “View” menu: Open Sky View | |
Control room | XEPHEM: SKY VIEW WINDOW: “Telescope” menu: “Configure” window: Radio buttons (both checked/activated by default. Leave them that way): Show skyview marker; Enable Telescope GoTo; Radio button: Telecscope “running”: toggle on with mouse click | |
Control room | Warning box (“OK” verification): DISMISS | |
Control room | XEPHEM: Back to: SKY VIEW WINDOW (to perform TELESCOPE INITIALIZATION): Find a bright star near the meridian, at Elevation ~45°; Based on RA and DEC, picture 1st move in ALT – AZ telescope will make; After selecting star in Sky View window, pick Tel GoTo; WATCH telescope to see whether it is moving as envisaged. BE READY with software stop (hover mouse over “STOP” button); Watch for target star to go through finder field on monitor (usually exits the frame near upper left) | |
Control room | MOUNT CONTROL tab: Open paddle, select 100 arcsec/sec rate | |
Control room | Paddle: push telescope (usually NORTH) until object is recovered in finder-telescope monitor | |
Control room | Paddle: push telescope until object is in grease pencil cross-hairs circle | |
Control room | TCSglue main window: “Init co-ords” radio button: turn “ON” with mouse click (this can be done more than once without harmful effects) | |
Control room | Turn on the main dome fan (green button on a strip to the right of the SW balcony door) | |
Control room | turn intercom down | |
Control room | Open Trouble Report (TRVATT) in browser, and note opening time, outside ambient temperature, relative humidity, wind velocity & direction | |
TELESCOPE “Go Live” SEQUENCE done | ||
Control room | XEPHEM SKY VIEW WINDOW: Data menu: search memory & select target; Command Telescope: “GoTo” with mouse click | |
Control room | WATCH telescope to see whether it is moving as envisaged. BE READY with software stop (hover mouse over “STOP” button). | |
Control room | TCSglue main window: select filter | |
Control room | XEPHEM SKY VIEW WINDOW: “Go To” telescope to the collimation object (magnitude < 7) | |
Control room | Paddle: Jog selected object into finder telescope monitor cross hairs | |
Control room | TCSglue main window: Init co-ords (do this again because it will improve localized pointing: collimation object is in the vicinity of the science target) | |
Control room | Check/optimize telescope focus with science camera (prior to collimation) | |
Control room | “Autocollimation” must be running throughout the collimation & focusing procedure! | |
Control room | Adjust focus with New Secondary GUI, taking an exposure with the science camera and evaluating the distribution curve fit in IRAF xgterm | |
Control room | VATT Guider APP: “Guide box” tab: reset guider & user offsets | |
Control room | VATT Guider APP: “Guider” pull-down menu: select “View Field Center” (inserts pickoff mirror) | |
Control room | VATT Guider APP: “Camera” tab: INIT CAMERA; set 2 sec exposure; “START” (sets timer box in motion) | |
Control room | Paddle: push collimation object to center of guider monitor @ rate of 5 sec/sec. DO NOT USE GUIDER STAGES TO CENTER OBJECT. | |
Control room | VATT Guider APP: “Guide box” tab: defocus to obtain “donut” (user offset: cca -25) | |
Control room | Reduce guide camera contrast until appropriate amount of splotchiness in “donut” to ascertain even distribution of energy. | |
Control room | New Secondary GUI: adjust TipX, TipY to even out light distribution in “donut”, re-centering object with paddle | |
Control room | VATT Guider APP: “Guide box” tab: refocus (adjust user offset; it will be a value close to 0) | |
Control room | VATT Guider APP: “Guide box” tab: select U-mirror | |
Control room | Check/optimize telescope focus with science camera (after collimation) | |
Collimation & focusing achieved | ||
Control room | XEPHEM GoTo target using Skyview or Data search/load dialog box OR enter RA-Dec in TCSglue main window | |
Control room | Use Paddle to center target in the Finder | |
Control room | Take image with main science camera to check the field; use paddle to adjust; re-initialize coordinates as required | |
Target acquired | ||
Control room | VATT Guider APP: “Guide box” tab: check that User X,Y offsets are 0; maintain the focus user offset determined after collimation | |
Control room | VATT Guider APP: “Camera” tab: set integration time to 0.5 s | |
Control room | VATT Guider APP: “Catalog” tab: select a circle (representation of a star) to move the guider camera stage (in this case the APP will adjust focus automatically; moving the stage by setting offsets may cause defocusing); watch the Guider camera output on monitor VERY CAREFULLY; if a star streaks by, wait until the motion is completed and then try to return to the star by setting offsets (the camera's field is cca 5×5 offsets units); adjust guider focus by setting an offset (sensitive to a single offset unit) | |
Control room | VATT Guider APP: “AutoGuider” tab: place the yellow square around the star; check that a centroid is calculated (line at the bottom of the window) and a red dot indicating the position of the centroid appears in the yellow square; open “Markers…” window, and press “Mark Pt.”; in the main window toggle last button to “Guiding…” | |
Control room | VATT Guider APP: if chopping required, set up additional markers by moving the telescope (paddle in jog mode), pressing “Mark Pt.” and naming the new marker; then chop by switching between the markers using the pull-down menu with the list of marker names (top right corner of the APP window) | |
Guiding set up |