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- Verify vacuum conditions in the IP of approximately 1e-6 Torr.
- Verify both US-DPS and DS-DPS pumps are running and operating as normal. Also check VPIO:LI20:3164 to ensure the ion pump is on.
- This is how the DPS looks under nominal operation:
- Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
- Find the VGCM:LI20:M3203:PMONRAW pressure - this is the 10 Torr capacitance manometer gauge that will provide the IP pressure.
- Verify the oven fill line is connected to the gas bottle of the desired gas type and the flow regulator is closed.
- Gas bottles and flow regulator location:
- Open the fill valve #1 to evacuate the line and leave open for several minutes then close.
- Open the gas bottle and set the regulator to 10 psig.
- Read the gas bottle pressure and ensure that there is enough gas to last for the intended fill.
- Previous measured rate of He usage at 5 Torr IP pressure = 165 psi/day (one full 2500 psi bottle drained in ~15 days)
- Verify gas bottle on fill line #2 is closed and that the fill valve for this line is closed.
- Open the fill valve #1 and set flow rate on the flow regulator to 0.1 SCFH to purge He through the fill line for several minutes.
- Close the fill valve to stop the flow and evacuate the IP again.
- If operating the Li oven, follow the E300 procedure to prepare the Li oven for a static fill.
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