Micromeritics TRISTAR II PLUS - Maintain High-Purity Gases; Purge Method for Removing Trapped Air

D Maintain High-Purity Gases
PURGE METHOD
This is the preferred method for removing trapped air.
1. Go to Unit [n] > Enable Manual Control. Ensure a checkmark displays to the left of the
menu item. If the analyzer schematic does not display, go to Unit [n] >Show Instrument
Schematic.
If multiple instruments are installed, choose the correct Unit menu.
2. Close all valves by right-clicking each valve, then click Close.
3. Open the regulator shut-off valve.
4. Open the gas cylinder valve briefly and allow the regulator to be charged with gas until the
high pressure gauge reads just over half the tank pressure, then quickly close the valve.
A. Gas tubing to instrument
B. Gas regulator shut-off valve
C. Low pressure gauge
D. High pressure gauge
E. Gas cylinder shut-off valve
F. Regulator connecter nut
G. Regulator control knob
H. Brass reducer fitting
5. Use the Pressure Control knob to set the output pressure (gas cylinder pressure gauge) to
15psig.
6. Loosen the fitting at the instrument helium inlet until the low pressure side drops to approx-
imately 3 psig (0.02 MPa), then tighten the fitting.
D - 2
TriStar II Plus Operator Manual
303-42800-01 (Rev M ) — Sep 2023