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Teledyne API Model 200AU NO
X
Analyzer Instruction Manual, 02293, Rev. F
7-20
Table 7-12: Expected Span Gas Concentration Procedure
Step Number Action Comment
1. Press
CAL-CONC-NOX
This key sequence causes the M200AU 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 7-13: Span Calibration Procedure
Step Number Action Comment
1. Press CAL The M200AU enters the calibrate mode from sample mode.
When the CAL button is pressed, the adaptive filter is activated.
This allows the instrument to respond rapidly to concentration
changes regardless of their magnitude.
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 M200AU returns to SAMPLE mode.