FlowPrep 060 Rear Panel Connections
May 2010 2-5
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
3
/min. Experience with your
samples will help you determine whether a change is required.
Table 2-2. Gas Flow Rate
A flow rate of 50 cm
3
/min is the maximum flow rate that would generally be used in
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
3
/min.
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.
Flow Gauge Pressure
cm
3
/min psi kPa
10 4 28
20 6 41
30 8 55
40 10 69
50 13 90
Copper Tubing
Gas Fitting
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