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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
Table 7-7-15: Expected Span Gas Concentration Procedure
Step Number Action Comment
1. Press
CAL-CONC-NOX
This key sequence causes the M200A to prompt for the
expected NO
x
concentration.
Enter the NO
x
span concentration value by pressing the key
under each digit until the expected value is set. This menu can
also be entered from CALS or CALZ.
2. Press ENTR ENTR stores the expected NO
x
span value.
3. Press
CAL-CONC-NO
Now enter the expected NO span concentration as in step one.
4. Press ENTR Pressing ENTR stores the NO span value and returns the prompt
to the CONC menu.
5. Press EXIT Returns instrument to SAMPLE mode.
Sample the generated concentration until the NO and the NO
x
responses have stabilized.
Span the instrument by the following procedure:
Table 7-7-16: Span Calibration Procedure
Step Number Action Comment
1. Press CAL The M200A enters the calibrate mode from sample mode.
2. Wait 10 min Wait for readings to stabilize at span values.
3. Press SPAN If you change your mind after pressing SPAN, you can still
press EXIT here without spanning the instrument.
4. Press ENTR Pressing ENTR actually changes the calculation equations.
5. Press EXIT M200A returns to SAMPLE mode.
The analog voltage output should measure 80% of the voltage range selected. (e.g. 4.00 VDC if
0-5V output is selected.) The readings on the front panel display should be equal to the expected
NO and NO
x
concentrations entered in the procedure given in Table 7-7-15 above. See the
Troubleshooting Section 9.2.8 if there are problems. Also see the Calibration Quality Check
procedure Section 7.10.
After the zero and the 80% URL points have been set, generate five approximately evenly
spaced calibration points between zero and 80% URL without further adjustment to the
instrum
ent. Allow the instrument to sample these intermediate concentrations for about 10
minutes each and record the instrument NO and NO
x
responses.
7-23
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