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07271B DCN6646 7
1.0 T201 AMMONIA ANALYZER
This manual is to be used in conjunction with the T200 NO
x
Analyzer
manual, p/n 06858 supplied with this instrument. It is important that you
familiarize yourself with the workings of the NO
x
analyzer before
proceeding with NH
3
measurements.
The T201 ammonia analyzer consists of a modified T200 nitrogen oxide
analyzer and an M501 NH
3
ammonia converter. The analyzer measures
the following individual gas concentrations: TNx (NH
3
and NO
x
),
NO
x
(NO and NO
2
)
and NO in the sample gas.
The
ammonia concentration is calculated by subtracting the NO
X
reading from the TNx measurement.
The
nitrogen dioxide concentration is calculated by subtracting the NO
reading from the NO
x
measurement.
The instrument comes in three pneumatic configurations:
The T201 with External Calibrator Option (ECO) is shown in
Figure 1-1.
The basic system is shown in Figure 1-2.
The T201 with Zero/Span valves is shown in Figure 1-3.
Note
For a T201 analyzer with Zero/Span option you must connect the umbilical
cord P/N 02255 between the analyzer and the external M501 NH
3
converter
assembly.
If the analyzer is purchased without the Zero/Span option then the zero and
span calibration gases must be individually applied to the Sample port.
Remember, the gases must be clean/dry and supplied at ambient pressure.
CAUTION
Do not pressurize the Sample/Span/Zero port above ambient