XMTC User’s Manual 67
Appendix B. Typical Applications
B.2.7a Start-up
1. Mount the sample system in an enclosed area heated to a temperature above 0
o
C.
2. Make sure that all needle valves are fully closed.
3. Run 1/4” tubing from the process to N1 (Sample Inlet).
Note: If the process is at a high pressure, a pressure regulator should be placed before this valve.
4. Run 1/4” tubing from the pressure regulator on the cylinder containing the zero calibration gas to N2 (Zero Gas
Inlet).
5. Run 1/4” tubing from the pressure regulator on the cylinder containing the span calibration gas/reference gas to
N4 (Reference Gas Inlet).
Note: No pressure restrictions should be placed on the flowmeter outlets. Any tubing on the outlets should be at least
1/4” in diameter, and preferably 1/2”.
6. Leak test all sample system fittings, as well as those leading to the sample system.
7. Bring 24 VDC to the XMTC. Refer to Chapter 2, Installation, and allow 1 hour before proceeding.
8. Slowly open N1 until the sample outlet flowmeter reads mid-scale. The pressure gauge at the sample outlet
should read 0 psig.
9. Slowly open N4 until the reference gas outlet flowmeter reads mid-scale. The pressure gauge at the reference
gas outlet should read 0 psig.
After the system has come to equilibrium, the sample system should be checked periodically to insure that there is gas
flow through both flowmeters.
CAUTION! The XMTC is calibrated and intended for use at atmospheric pressure. Higher
pressures will lead to inaccurate readings, may result in damage to the instrument, and/or may
pose a safety problem.
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