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/* Vacuum Pumping and LN2 filling: */
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[[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.
# After the first flask, close the cryostat vacuum valve and stop the pump.
# 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:'''===
