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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
Step 2 - Calibrate the instrument:
Initial Zero/Span Calibration Procedure
Step Number Action Comment
1. Input Zero gas Allow Zero gas to enter the sample port on the rear of the
instrument.
2. Press CAL The M100AH enters the calibrate mode from sample mode.
3. Wait 5 - 10 min Wait for reading to stabilize at the zero value. (If you wait
less than 5 - 10 minutes the final zero value may drift.)
4. Press ZERO The ENTR button will be displayed.
5. Press ENTR Pressing ENTR actually changes the calculation equations
and zeroes the instrument.
6. Press EXIT M100AH returns to the CAL menu. Allow SPAN gas to enter
the sample port on the rear of the instrument.
7. Wait 5 - 10 min Wait for reading to stabilize at the span value. (If you wait
less than 5 -10 minutes the final span value may drift.)
8. Press SPAN If SPAN button is not displayed, check the Troubleshooting
Section 10.2.8 for instructions on how to proceed. In certain
circumstances at low span gas concentrations (<100PPM),
both the ZERO and SPAN buttons will appear. This is
acceptable and just do not press ZERO button.
9. Press ENTR Pressing ENTR actually changes the calculation equations so
that the concentration displayed is the same as the expected
span concentration you entered above, thus spanning the
instrument.
10. Press EXIT Pressing EXIT returns the instrument to SAMPLE mode.
Step 3 - Review the quality of the calibration:
Calibration Quality Check Procedure
Step Number Action Comment
1. Scroll the TEST
function menu until
SLOPE is
displayed.
Typical SLOPE value is 1.0
±
0.3. If the value is not in this
range, check Section 8.7 or 10. If the SLOPE value is in the
acceptable range the instrument will perform optimally.
2. Scroll the TEST
function menu until
OFFSET is
displayed.
The M100AH will display the OFFSET parameter for the
SO
2
equation. A value less than 200mV indicates calibration
in the optimal range. If the OFFSET value is outside this
range, check Section 8.7 and 10.
Step 4 - The M100AH is now ready to measure sample gas.
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