Changes
74 Inch
,/* Vacuum Pumping and LN2 filling: */
D. Carter 13 November 2015
W. Koorts 10 December 2015
M. Rust 21 February 2016
A.C. Mulaudzi 05 April 2016
CAVEAT: Details are changing fast around this instrument, so these
notes might not be 100% accurate……
===Checklist:==={| class="wikitable" border="1"|-! Items to check ! Checked|-| Instrument on telescope Telescope| |-| Lodestar Acq. Camera/XY slide mounted & connected | |-| Lodestar rear-of-slit camera mounted & connected | |-| PLC comms connected | |-| Science CCD comms connected All subsystems powered | |-| SubSystems power up | |-| '''Functional tests, PLC: '''| |-| • Offset guide Comparison mirror IN/OUT | |-| • Comparison mirror IN/OUT | |-| • Arc Lamps 1 & 2 ON/OFF | |-| • Slit illumination ON/OFF | |-| • Hartmann shutters A & B IN/OUT | |-| • Rear of slit mirror IN/OUT | |-| • Grating angle adjustment | |-| • Slit width adjustment | |-| • Filter wheel selection | |-| | |-| '''Functional tests, Science Detector: '''| |-| • CCD readout – bias frame | |-| • CCD readout – ARC image | |-| '''Functional tests, TCS: '''| |-| • XYslide reset/position initialize | |-| • Acq. Camera imaging – view the slit | |-| '''Functional test, rear-slit viewing camera: '''| |-| • Image shows the slit | |-TODO: CLI startup & general computer interaction| | |}
''TODO: CLI startup & general computer interaction''
[[File:SPUPFig1.JPG]]
Note in Fig. 1 keyboard/mouse peripherals have been omitted for clarity
==='''Vacuum Pumping and LN2 filling:'''===1. # The day before, connect the vacuum pump using the 500mm long vacuum hose (see Fig. 1) and pump-down overnight. 2. # The next morning, check that the vacuum got down to the 10-6 mbar range.3. # Shortly before mounting the instrument, while still vacuum pumping, start filling the cryostat with LN2. 4. # After the first flask, close the cryostat vacuum valve and stop the pump. 5. # Continue filling slowly until full, indicated by LN2 boiling in the outer funnel. When full, using a glove, quickly remove the inner funnel and dump the excess LN2 back in the filling flask.
==='''On the Telescope:'''===# Ensure that the telescope is switched OFF# Mount the instrument on the telescope (mechanical responsibility)# Mount XYslide and Acquisition/autoguider camera# Connect cabling and services:# Numbered list item* At the instrument services panel (Fig. 2), connect the instrument mains supply, compressed air feed, and RS232 comms cable.* Check that the air pressure is 600KPa at the south pier and 300KPa on the instrument. See Fig. 5* The USB cable to the Lodestar acquisition camera.* XY slides cables (x4)* Dual optical fibre to the SDSU CCD controller. (Note that the SDSU fibre is an individual dual fibre cable fed thru the axis). Note the colour coding for the SDSU fibre (Rx cable connector is marked ‘R’) – see Fig. 3.* Connect the PLC RS232 cable to the RS232 connection point at the NW corner of the mirror cell.* Connect the rear-of-slit viewing camera USB cable to the USB/fibre convertor in the fibre box on the east side of the mirror cell.# Power up:* SDSU PSU (only 3 leds will be on – see Fig. 4)* XY-Slides (south side of telescope - see Fig. 6)
'''In the Warm Room:Install the computer systems as per Fig. 7 below. '''
* Install the computer systems as per Fig. 7 below.
* Fire up the TCS software and check functionality as follows:
# Check that the XY slide initializes correctly (reset button on the emergency stop box on the north pier)
# Lodestar Acquisition CCD camera operational – start exposures, check the readout occurs properly. (Note that the regular control box for the acquisition mirror is empty since it is not present.)
* On the SpUpNIC computer:
# Ensure that the SpUpNIC fibre is plugged in. When the fibre is correctly connected AND BOTH the computer and CCD controller are powered up, a green LED is ON on the interface (Fig 8).
# Ensure the dual monitors, keyboard & mouse are connected.
# Ensure the LAN cable and RS232 connector (to the PLC) are connected (Fig. 8).
* Check that the Lodestar industrial PC is installed (Fig. 7).
* At the back of the TCS-rack:
# check that the RS232 PLC cable is connected to the fibre, and the channel selector switch is correctly set (Fig 9, bottom insert box).
# check that the USB connection to the Lodestar rear-of-slit camera is plugged in to the USB-to-fibre convertor (Fig. 9, top insert box).
# check that the USB connection to the Lodestar acquisition camera is plugged in to the USB-to-fibre convertor, located on the right-hand side of the rear-of-slit camera fibre convertor.
'''Check out the software/instrument functionality:'''1. * Power up the SpUpNIC PC (if not already running).2. * Log in: User name: CCD - the usual password.3. * Launch the instrument software by single clicking on the two desktop icons (in the sidebar):
SpUpNIC SpUpNIC QuickLook
Note: You will be navigating between three tabs (top-left of Monitor 1) on the SpUpNIC Instrument Control GUI. Figs. 10, 11 & 12 show the Main View, Advanced and Engineering View tabs respectively.
The following three items are operated from the Main View tab, Panel 2 (Fig. 10). Select a value/number and click “Go”:
8. Do an ARC test exposure:a. Slit width 1.5” (slit setting 10).b. In the Main View tab, panel 2 (Fig. 10) check which grating is currently mounted and set the corresponding grating angle as per table 1:
Table 1: Suitable grating angle for a reasonable ARC exposure
Grating Number Angle