Appendix B. Typical Applications
64
XMTC User’s Manual
B.2 H
2
Purity in H
2
-
Cooled Electricity Generator
The XMTC can be used to measure the purity of hydrogen (H
2
) in hydrogen-cooled electricity generators used in the
power industry.
B.2.1 Problem
H
2
is used as a cooling medium in electricity generators because of its high thermal conductivity. If air leaks into the
H
2
, the mixture can become explosive.
B.2.2 Equipment
A typical instrumentation package includes a 4-port (Flowing Reference Gas - hydrogen), explosion-proof XMTC
transmitter with a 4-20 mA range of 80 to 100% H
2
mounted in a sample system similar to the one shown in
Figure 58
below. An XDP display package is often specified.
Figure 58: Sample System (732-028)
REFERENCE
SAMPLE
OUTLET
INLET
SAMPLE
REFERENCE
GAS INLET
GAS OUTLET
ZERO GAS
INLET
N1
N2
N3
N4
9.00
(229.5)
(MIN)
TRANSMITTER
Summary of Contents for XMTC
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