TriStar II 3020 Appendix G
302-42828-01 - Dec 2012 G-3
5. Using the Pressure Control knob, set the output pressure (gas bottle pressure gauge) to 15 psig.
6. Loosen the fitting at the helium inlet (on the rear panel of the TriStar) until the low pressure side
drops to approximately 3 psig (0.02 MPa), then tighten the fitting.
7. Repeat steps 4, 5, and 6 three times.
8. Briefly open the gas bottle valve; then, using the Pressure Control knob, reset the regulator output
pressure to 15 psig.
9. After the pressure has stabilized (indicating there are no leaks), open the gas bottle valve.
Evacuation Method
1. Do one of the following:
2. Select Unit > Enable manual control (if the instrument schematic is not displayed, select Show
instrument schematic)
.
To use this method, the gas tank must be within 10 feet of the instrument.
If... Then...
The regulator has not been
filled with gas and the gas
line is attached to the
instrument:
Close the gas bottle valve.
Open the regulator Shut-off valve.
The regulator is filled with
gas:
Close the gas bottle valve.
Open the regulator Shut-off valve.
Loosen the helium inlet fitting (or nut) on the rear panel of the
instrument.
Allow all of the gas in the regulator to expel from the line (pressure
reading will be zero).
Retighten the helium inlet fitting (or nut).
If multiple TriStars are installed, make sure to choose the correct Unit menu.
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