Micromeritics Gemini VII 2390a Operator's Manual page 247

Gemini VII
a.) Turn the regulator clockwise until the low pressure gauge shows a few pounds of pressure.
b.) Turn the regulator shut-off valve counterclockwise to open.
c.) Open the gas bottle shut-off valve to flow gas.
d.) Close the regulator shut-off valve to stop flow.
e.) Close the gas bottle valve.
5. Set the instrument pressure.
Regulator
shut-off valve
Regulator
control knob
a.) Turn the regulator control knob clockwise until the low-pressure gauge reads 15 psig 
(103 kPag).
b.) Open the regulator shut-off valve.
c.) Open the gas bottle shut-off valve and flow gas for 10 to 30 seconds.
d.) Close the gas bottle shut-off valve.
6. If the gas line to the instrument inlet was previously disconnected, reconnect it now.
7. Verify the line for the newly connected gas is clean.
8. If the previously disconnected gas has been reconnected, resume operation.
239-42828-01 - Dec 2012
Low-pressure gauge
Connecting Gases
Gas bottle
shut-off valve
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