Teledyne 275R - Portable turbine generator purge gas analyzer - Manual (Page 9)

3.1
TELEDYNE ANALYTICAL INSTRUMENTS
Operations 3.0 Operations 3.0 Operations 3.0 Operations 3.0 Operations 3.0
Operations Operations Operations Operations Operations
3.1 3.1 3.1 3.1 3.1 Front Panel Front Panel Front Panel Front Panel Front Panel
3.1.1 3.1.1 3.1.1 3.1.1 3.1.1 Function Switch Function Switch Function Switch Function Switch Function Switch
This switch is used to select the gas mixture range to agree with the
composition of the sample. Gas compositions for which your analyzer is
intended are hydrogen and carbon dioxide (0-100% H
2
in CO
2
), or air and
carbon dioxide (0-100% air in CO
2
), or purity of hydrogen (e.g. 90-100%
H
2
with 0-10% impurities).
3.1.2 3.1.2 3.1.2 3.1.2 3.1.2 Zero Control Zero Control Zero Control Zero Control Zero Control
The zero control potentiometers are used to adjust the zero reading for
each range when a zero gas is introduced into the analyzer. See Appendix: Appendix: Appendix: Appendix: Appendix:
Specifications Specifications Specifications Specifications Specifications for the recommended zero gas.
3.1.3 3.1.3 3.1.3 3.1.3 3.1.3 Span Control Span Control Span Control Span Control Span Control
The span control potentiometers are used to adjust the meter to read
the known concentration of a span gas present in the measuring chamber.
See Appendix: Specifications
Appendix: Specifications Appendix: Specifications Appendix: Specifications Appendix: Specifications for the recommended span gas.
3.1.4 3.1.4 3.1.4 3.1.4 3.1.4 Cell Temperature Cell Temperature Cell Temperature Cell Temperature Cell Temperature
Generally the cell temperature is stable within 30 minutes of switch-
ing on the analyzer. The indicator lamp on the front panel shows when the
heater is on, and when it is flashing the cell is up to its operating tempera-
ture.
3.1.5 3.1.5 3.1.5 3.1.5 3.1.5 Flowmeter Flowmeter Flowmeter Flowmeter Flowmeter
The flowmeter is used to control and adjust the sample (or span or
zero) gas flow through the measuring chamber.
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