GE XMTC, User Manual

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XMTC User’s Manual 61
Appendix B. Typical Applications
B.1.4 Permanent Installation
Continuous monitoring of the furnace atmosphere H
2
content using the XMTC assures a high degree of quality control
in the manufacturing process.
B.1.5 Specifications
Typical Ranges:
0 to 10% H
2
in N
2
0 to 25% H
2
in N
2
0 to 100% H
2
in N
2
Operating Conditions:
Pressure: Ambient
Temperature: +540 to +1370
o
C (+1000 to +2500
o
F)
B.1.6 Detailed Operating Procedure
The following procedure details the start-up, operation, and calibration of the 2-port (Sealed Reference Gas) XMTC
sample system for heat treat furnace applications shown in
Figure 56 on page 59 .
Needle valves N1 through N4 on the sample system drawing have the following functions:
•
N1 – selects/isolates the process sample gas
•
N2 – selects/isolates the calibration zero gas
•
N3 – selects/isolates the calibration span gas
•
N4 – controls the flow of the selected gas