Teledyne T200, Operation Manual, Page: 70 / 425

Getting Started Teledyne API
– T200 NO/NO
2
/NO
X
Analyzer Operation Manual
68
3.4.4. INITIAL CALIBRATION
To perform the following calibration you must have sources for zero air and calibration
(span) gas available for input into the inlet/outlet fittings on the back of the analyzer (see
Section 3.3.2.1).
Note A start-up period of 4-5 hours is recommended prior to performing a calibration
on the analyzer.
The method for performing an initial calibration for the T200 differs slightly depending
on the whether or not any of the available internal zero air or valve options are installed.

See Section 3.4.4.2 for instructions for initial calibration of the T200 analyzers in
their base configuration.

See Section 9.3 for instructions for initial calibration of T200 analyzers with an
optional Internal Span Gas Generator (OPT 51A).

See Section 9.4 for information regarding setup and calibration of T200 analyzers
with Z/S Valve options.

If you are using the T200 analyzer for EPA monitoring, refer to Section 10 for
references and use only the EPA calibration method.
3.4.4.1.
Interferents for NO
x
, NO and NO
2
Measurements
The chemiluminescence method for detecting NO
X
is subject to interference from a
number of sources including water vapor (H
2
O), ammonia (NH
3
), sulfur dioxide (SO
2
)
and carbon dioxide (CO
2
) but the T200 has been designed to reject most of these
interferences.

Ammonia is the most common interferent, which is converted to NO in the
analyzer’s NO
2
converter and creates a NO
X
signal artifact.

If the T200 is installed in an environment with high ammonia, steps should be
taken to remove the interferent from the sample gas before it enters the reaction
cell.

Teledyne API offers a sample gas conditioning option to remove ammonia and
water vapor (Section 3.3.2.6).

Carbon dioxide (CO
2
) diminishes the NO
X
signal when present in high
concentrations.

If the analyzer is used in an application with excess CO
2
, contact Teledyne
API's Technical Support Department (see Section 12.10) for possible solutions.

Excess water vapor can be removed with one of the dryer options described in
Section 3.3.2.6. In ambient air applications, SO
2
interference is usually negligible.
For more detailed information regarding interferents for NO
x
, NO and NO
2
measurement, see Section 13.1.5.
06858E DCN7057