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Teledyne API Model 200AU NO
X
Analyzer Instruction Manual, 02293, Rev. F
7-16
5. Verify that the residence time (t
R
) in the reaction chamber is <2 min using Equation 7-5:
min58.0
min/
cm
5.29min/
cm
282
cm
180
= t
33
3
R
=
+
6. Verify the dynamic parameter specification (P
R
) of the calibrator reaction chamber using
Equation 7-6:
ppm75.2
min/
cm
4.29min/
cm
282
cm
180
min/
cm
4.29min/
cm
282
min/
cm
4.29
ppm5.50= P
33
3
33
3
R
=
+
×
+
×
7. Calculate the diluent air flow (F
D
) required at the mixing chamber, using Equation 7-7:
F
D
= 3300 cm
3
/min - 282 cm
3
/min –29.4 cm
3
/min = 2988.6 cm
3
/min
7.6.5 Dynamic Multipoint Calibration Procedure
The procedure for calibration of chemiluminescent NO
x
analyzers by GPT is specified in the
Federal Register.
1
This section applies the general procedure to the specific case of the
M200AU.
Calibration must be performed with a calibrator that meets all conditions specified in Subsection
2.3.2 (Q.A. Handbook). Flow settings used in the GPT calibration for NO
2
must be determined
as illustrated in Section 7.6.4, this manual.
The user should be sure that all flow meters are calibrated under the conditions of use against a
reliable standard. All volumetric flow rates should be corrected to 25
o
C (78
o
F) and 760 mm
(29.92 in.) Hg. Calibrations of flow meters are discussed in TAD.
2
Gas Phase Titration (GPT) requires the use of the NO channel of the analyzer to determine the
amount of NO
2
generated by titration. Therefore it is necessary to calibrate and determine the
linearity of the NO channel before proceeding with the NO
2
calibration. It is also necessary to
calibrate the NO
x
channel. This can be done simultaneously with the NO calibration. During the
calibration the M200AU should be operating in its normal sampling mode, and the test
atmosphere should pass through all filters, scrubbers, conditioners, and other components used
during normal ambient sampling and as much of the ambient air inlet system as is practicable.
All operational adjustments to the M200AU should be completed prior to the calibration. The
following software features must be set into the desired state before calibration.