Model 106-H Ozone Monitor Manual Rev. D-2
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5.2.2
Measurement of Zero Gas
1. Verify that the zero gas supply is on and the ozone generator is off. The
same zero gas supply used in the ozone generator must be used in the
zero gas measurement.
2. Allow the Model 106-H to sample zero gas until the response is stable.
3. Perform the zero function in the menu (Section 3.10).
5.2.3
Measurement of Ozone Standards
1. Generate an ozone concentration slightly less than the concentration range
of interest and allow the ozone generator to warm up for at least 5 minutes.
The same zero gas supply used for making zero gas measurements must
be used in the ozone generator.
2. Allow the Model 106-H Ozone Monitor to sample the ozone concentration
standard until a stable response is measured.
3. Record the average response of the ozone monitor as well as the average
response of the working standard.
4. Generate several other ozone concentration standards. At least 5 ozone
concentration standards are recommended over the range of interest.
5. For each ozone concentration standard, record the response of the ozone
monitor as well as the working standard.
5.2.4
Calibration Curve
1. Plot the Model 106-H Monitor responses (y-axis) versus the corresponding
standard ozone concentrations (x-axis).
2. Fit the data to a straight line (y = mx + b) using the linear regression
technique to determine the calibration relationships.
3. Determine if any points deviate significantly from the line, which is an
indication of an error in determining the calibration curve. The error may
be due to the calibration setup or the ozone monitor being calibrated.
4. The inverse of the slope of the line (1/m) is the gain factor (S) that needs to
be applied to the ozone monitor response to calibrate it to the working
standard. If the slope is outside of the range from 0.850 to 1.150, this is an
indication of a problem in the calibration setup or the ozone monitor being
calibrated.
5. Enter the calibration menu (
Main Menu / Admin / Cfg / Cal / O3
) in the
instrument software and set the S calibration parameter (1/m as
determined above).
