Basic Operating Procedure - GE XMTC User Manual

Appendix B. Typical Applications
B.1.2 Equipment (cont.)
The sample system consists of needle valves for selection and isolation of sample, zero, and span gases, a needle valve
for flow control, a filter/coalescer, a 2-port XMTC transmitter, a pressure gauge, a flowmeter, and a sample pump. All
components are mounted on a painted steel plate.
Note: A TMO2D or XDP display package is typically used. A GE moisture analyzer can be used when the H
measurement is to be made in conjunction with a moisture measurement.
B.1.3 Basic Operating Procedure
The H content is continuously monitored at the inlet, hot zone, and/or effluent of the furnace. A sample gas flow rate
2
of 0.5 SCFH (250 cc/min) is established. The sample system should be located in an area cooler than 50
the tubing leading to the sample system should be at least 5 ft (1.5 m) long to insure proper cooling of the sample gas.
For this application the required calibration gases are:
•
Zero gas - N (99.95 % minimum purity)
2
•
Span gas - 10.0 or 25.0% H
A typical XMTC Calibration Data Sheet is shown in Figure 57 below.
60
in N , or H (99.95 % minimum purity)
2 2 2
XMTC CALIBRATION SHEET
THERMAL CONDUCTIVITY TRANSMITTER
Serial Number
Part Number
Range, %
Output
PC Board
Work Order:
Calibration Date:
*Calibration is with Hydrogen (H
Figure 57: A Typical XMTC Calibration Data Sheet
TC-102
XMTC-22-2
0 to 25% H
2
4 to 20 mA
703-1095
PCI 90403
September 18, 2000
Point %H * H , mA
2 2
1 0.00 4.00
2 25.00 20.00
) in Nitrogen (N
2
o
)
2
XMTC User's Manual
2
o
C (122 F), and