Overview and Installation
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1-5
repositioning the Gas Inlet/Outlet
Connections
You can change the orientation of both the
sample gas inlet and outlet from horizontal.
1. Locate the Swagelok fitting near the IN
/OUT labels on the right-hand side of the
unit.
2. Loosen the Swagelok fitting and rotate it
to the new position.
3. Tighten snug by hand or lightly seat the
nut using a wrench. Using a wrench,
tighten an additional 1/4 turn.
Checking for Leaks
After the connections are made at the inlet and outlet, the analyzer should
be pressure-checked at 10 PSIG. If the pressure drops at all over a five-
minute time interval, follow the method outlined below and then check
all joints for leaks using the “snoop” or soapy water method.
1. Connect the analyzer between two valves as shown in Figure 1-2.
2. Set the N
2
test gas outlet pressure to 10 PSIG.
3. Open Valves 1 and 2 and allow the N
2
gas to flow.
4. Close Valve 2, and when the pressure gauge reads 10 PSIG, close Valve 1.
If the pressure reading is above 9 PSIG after one hour, the unit is accept-
able. If the pressure is below 9 PSIG , there is a leak that must be repaired.
N2
Test Gas
120 HN
Valve
1
Valve
2
Vent to Air
Pressure
Gauge
Figure 1-2.
Leak check diagram.
