Appendix B. Typical Applications
62 XMTC User’s Manual
B.1.6a 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 to N3 (Span
Gas Inlet).
Note: No pressure restrictions should be placed on the pump outlet. Any tubing on the outlet 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. Bring 120 VAC to the sample pump.
9. Open N4 one turn.
10. Fully open N1.
11. Adjust N4 until the flowmeter reads mid-scale. The pressure gauge should read 0 psig.
After the system has come to equilibrium, the sample system should be checked periodically to ensure that there is gas
flow through the flowmeter.
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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