Micromeritics FlowPrep 060 Operator's Manual page 15

FlowPrep 060
6. Attach the other end of the copper tubing to the fitting on the back of the degasser.
7. Open the gas bottle shut-off valve.
8. Use the regulator pressure control knob to adjust the pressure. The following table shows
pressures and their resulting flow rates (tested with helium and nitrogen). If you do not
know the flow rate you want to use, start with about 10 cm
samples will help you determine whether a change is required.
A flow rate of 50 cm
normal operation. However, the degasser is capable of accepting up to 50 psi pressure. A
pressure of 50 psi (345 kPa) would produce a flow rate of approximately 250 cm
9. Close the gas bottle shut-off valve. Check the pressure. If it decreases, gas is probably
leaking at the fitting. Tighten the fitting. Then check the pressure again.
10. Open the regulator shut-off valve. The pressure should stabilize after about five minutes.
If it does not, gas is probably leaking at the brass reducer fitting or at the gas port on the
rear panel of the degasser. Tighten the fittings. Then check the pressure again.
11. Open the gas bottle shut-off valve.
May 2010
Copper Tubing
Gas Fitting
Table 2-2. Gas Flow Rate
Flow Gauge Pressure
/min psi
cm 3
10 4
20 6
30 8
40 10
50 13
3
/min is the maximum flow rate that would generally be used in
Rear Panel Connections
3 /min. Experience with your
kPa
28
41
55
69
90
3
/min.
2-5