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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
7. When the instrument is warmed up, re-check the TEST functions against Table 2-2-6. All
of the readings should compare closely with those in the Table. If they do not, see Section
9.1.1. The next task is to calibrate the analyzer. There are several ways to do a calibration,
they are summarized in Table 7-7-1. For a preliminary checkout we recommend calibration
with zero air and span gas coming in through the sample port. The procedure is:
Step 1 - Enter the expected NO
x
and NO span gas concentrations:
Step Number Action Comment
1. Press
CAL-CONC-NOx
This key sequence causes the M200A to prompt for the
expected NOx concentration. Enter the NOx span
concentration value by pressing the key under each digit until
the expected value is set.
2. Press ENTR ENTR stores the expected NOx span value. This value will be
used in the internal formulas to compute subsequent NOx
concentration values.
3. Press
CAL-CONC-NO
In the same CAL-CONC sub menu press the NO button and
enter the expected NO span value, then ENTR. As before this
value will be used in the internal formulas to compute the
subsequent NO concentration values.
4. Press EXIT-EXIT Returns instrument to SAMPLE mode.
5. Press
SETUP-RNGE-
MODE-SING-ENTR
If necessary you may want to change ranges. Normally the
instrument is shipped in single range mode set at 500 ppb. We
recommend doing the initial checkout on the 500 ppb range.
6. Press
SETUP-RNGE-SET
After SETUP-RNGE-SET, enter 500 and press ENTR. The
instrument will now be in the 500 ppb range.
7. Press EXIT Returns instrument to SAMPLE mode.
2-7
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