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74 Inch

22 bytes added, 12:23, 19 May 2016
/* Vacuum Pumping and LN2 filling: */
notes might not be 100% accurate……
===Checklist:===
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''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:'''===
# The day before, connect the vacuum pump using the 500mm long vacuum hose (see Fig. 1) and pump-down overnight.
# The next morning, check that the vacuum got down to the 10-6 mbar range.
# 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)
'''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
 4. * Position the Instrument Control GUI (SpUpNIC) on Monitor 1 and the Quicklook GUI (Detector Image display) on Monitor 2.
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.
5. * Test the CCD functionality as follows:a. # On the Main View, Panel 4 (Fig. 10) set “Exposure Type” to BIAS, “# Exposures” to 1, and click “Expose”. The CCD raw image should look something like Fig. 13, with an average count around 600 (mouse-over image).b. # Check the CCD temperatures (Engineering View tab, Panel 3 (Fig 12): CCD 167.8K, cold finger 85K (both ±0.5K). At the first fill the cold finger takes ~20 minutes to reach 94K then another ~1 hour to settle at 85K, and the CCD takes ~3 hours to reach 167K. Raw Image in the top pane, transect through the spectrum in the lower pane 6. * Initialise the PLC controlled mechanisms: Advanced tab, Panel 1 (Fig. 11) click the “INIT ALL – PLC subsystem” button to initialise the PLC system.7. * Check the instrument moving parts. Note that items a – f are best checked by clicking directly on the relevant items on the Main View tab, Panel 6 (Fig. 10):a. # Move the offset guide mirror IN/OUT of beam.b. # Move the comparison ARC mirror IN/OUT of beam.c. # Switch the ARC lamps (1 & 2) on/off.d. # Check the slit illumination: with guide mirror OUT beam use the acquisition camera viewing system to check the slit illumination on/off control.e. # Check the Hartmann Shutters (A & B) operation (ignore warning – it will disappear after a few seconds).f. # Check the rear of slit mirror.# Change the grating angle.# Change the slit width.# Select different filters.* Do an ARC test exposure:# Slit width 1.5” (slit setting 10).# 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:  
The following three items are operated from the Main View tab, Panel 2 (Fig. 10). Select a value/number and click “Go”:
g. Change the grating angle.
h. Change the slit width.
i. Select different filters.
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
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