TOF OPS: change gas system from recirc to purge or from purge to recirc
if in recirc mode now: to switch to purge mode:
1. click on the gui to disable alarms
2. click to stop the compressor C2.
steps 1 and 2 must be done first. subsequent steps
can be done in any order.
3. click to close SV6 and SV8 (leave SV9 closed)
4. click to close SV3 (stop isobutane flow)
5. close two black knobs on the back of the new O2 monitor
(on the top of the gas rack)
6. turn off PIDC (switch on gaspanel)
to switch to recirc mode............................................
1. turn on PIDC (switch on gaspanel)
2. open two black knobs on the back of the new O2 monitor
(on the top of the gas rack)
3. click to open SV6 and SV8 (leave SV9 closed)
4. click to open SV3 (start isobutane flow)
those steps can be done in any order, but must
precede the following steps
5. click to start compressor C2
6. click to enable alarms
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