Model 106-L Ozone Monitor Manual Rev. E
29
d
o
o
F
F
F
R
(2)
%
100
1
2
1
x
C
R
C
C
E
(3)
where:
R = Dilution ratio
F
o
= Ozone generator flow
F
d
= Diluent zero air flow
E = Linearity error, in percent
C
1
= Measured concentration of original concentration
C
2
= Measured concentration of diluted concentration
The linearity error should not be greater than 5%. If the error is greater than
5%, the accuracy of the flow dilution should be checked before assuming that
the ozone monitor is not linear. Note that the inherent linearity of the Model
106 is better than the error calculated in this linearity check due to the
uncertainty introduced by the flow measurements.
Intercomparison Test
Comparison of the calibration setup with other ozone standards is a good check
of the overall accuracy of the setup. If measurements from another ozone
standard are found to deviate from the calibration setup greater than the
instrument specifications, one of the calibration setups is not accurate.
CALIBRATION PROCEDURE
A multipoint calibration should be performed within the calibration frequency,
any time major disassembly of components is performed, or any time the zero
or span checks give results outside of the acceptable limits.
Instrument Preparation
1. Turn on the Model 106 Ozone Monitor and allow it to stabilize for a
minimum of one hour.
2. Enter the calibration menu (
Main Menu\Cfg\Cal\O3
) and set the zero
(Z) value to 0 and the slope (S) value to 1.00.
