Model 106-L Ozone Monitor Manual Rev. E
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3. Connect the ozone monitor to the manifold on the ozone calibration
setup. If a particle filter will be used in normal operation, the
calibration must be performed through the filter. The manifold must
be vented to atmosphere so that pressure does not build up in the
calibration setup. Connection of the Model 106 directly to a
pressurized output of any device can damage the ozone monitor.
4. Verify that the flow rate into the manifold is greater than the total flow
required by the ozone monitor plus any other flow demand drawing
from the manifold such as a UV photometer or ozone transfer
standard.
Measurement of Zero Air
1. Verify that the zero air supply is on and the ozone generator is off.
The same zero air supply used in the ozone generator must be used
in the ozone generator.
2. Allow the Model 106 to sample zero air until the response is stable.
3. Record the average zero air response.
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 air supply used for making zero air
measurements must be used in the ozone generator.
2. Allow the Model 106 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 either
the average response of the UV photometer the transfer 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 either the response of the UV photometer or
the transfer standard.
Calibration Curve
1. Plot the Model 106 Monitor responses (x-axis) versus the
corresponding standard ozone concentrations (y-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. The most likely problems in the ozone monitor are leaks,
a malfunctioning ozone scrubber, a contaminated valve, or
