Calibration
Photometer Calibration
4-2
Model 146
i
Instruction Manual
Thermo Fisher Scientific
Photometer
Calibration
The ozone generator used on the Model 146
i
qualifies as a transfer standard
under current U.S. Environmental Protection Agency requirements. In
order to use it as a transfer standard, the user must certify the generator,
following the procedures published in the technical assistance document for
the calibration of ozone transfer standards.
In order to determine a calibration curve for the ozone generator, an ozone
primary standard must be used. If an ozone analyzer is also available, the
generation of the calibration curve becomes easier. A procedure for both is
given below.
Calibration Using a Model
49
i
PS
Use the following procedure to calibrate the Model 146
i
using a Model 49
i
PS. Refer to the Photometer Calibration Flow Schematic (
).
1. Connect the 49
i
PS OUTPUT to the 146
i
EXTERNAL SAMPLE port.
2. Set flow of the 49
i
PS to the desired level.
3. Determine the ozone concentration at different ozone level settings on
the 146
i.
4. Determine a calibration curve by plotting the results of Step 3.
5. Change to the 146
i
Photometer Calibration Span.
6. For highest confidence, reconnect the 49
i
PS to the 146
i
and recheck
the ozone calibrations.
Содержание 146i
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Страница 273: ...Thermo Fisher Scientific Model 146i Instruction Manual 9 15 Figure 9 5 Bench Mounting ...
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