SS2000 Operator’s Manual
H
2
S in Natural Gas 3–21
making a measurement after the gas flows for approximately five minutes or
when the value on the LCD settles. SpectraSensors recommends validating the
analyzer using only
H
2
S in methane. A bottle of test gas with a certified
concentration representing 50% of full scale should be used.
Calibrating the Analyzer
Calibrating the analyzer is typically not required under normal circumstances.
SpectraSensors calibrates each analyzer to a National Institute of Standards
and Technology (NIST) traceable standard before shipping the unit to the end
user. Because SpectraSensors analyzers use a non-contact form of
measurement, they are relatively insensitive to contamination, are quite
rugged and virtually maintenance free ensuring years of reliable service.
When specifying gas standards, make sure the background gas is
that specified or, if not specified, a mix that closely resembles the
contents of the process stream and have the gas standard
certified to better than the specified precision of the analyzer, if
possible.
Figure 3–13 Highlighting imported data for plotting
in excel.
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