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05206H DCN5910 7
1.0 M201E AMMONIA ANALYZER
This manual is to be used in conjunction with the M200E NO
x
Analyzer
manual, p/n 04410 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 M201E ammonia analyzer consists of a modified M200E 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 is available in three pneumatic configurations:
The M201E with External Calibrator Option (ECO) is shown in Figure
1-1.
The basic system is shown in Figure 1-2.
The M201E with Zero/Span valves is shown in Figure 1-3.
Note: For an M201E 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