Teledyne API – Model T400 Photometric Ozone Analyzer Getting Started
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3.4.3. FUNCTIONAL CHECK
After the analyzer’s components have warmed up for at least 30 minutes, verify that the
software properly supports any hardware options that are installed: navigate through the
analyzer’s software menus; refer to the menu trees described in Appendix A.
Check to make sure that the analyzer is functioning within allowable operating
parameters.
Appendix C includes a list of test functions viewable from the analyzer’s front panel
as well as their expected values.
These functions are also useful tools for diagnosing problems with your analyzer
(Section 12.1.2).
The e
nclosed Final Test and Validation Data sheet (part number 04314) lists these
values as they were before the instrument left the factory.
Press the <TST TST> buttons to scroll through the list of Test parameters. Remember
until the unit has completed its warm up, these parameters may not have stabilized.
3.4.4. INITIAL CALIBRATION
To perform the following calibration you must have sources for zero air and calibration
(span) gas available for input into the inlet/outlet fittings on the back of the analyzer (see
Section 3.3.2).
The m
ethod for performing an initial calibration for the Model T400 photometric ozone
analyzer differs slightly depending on the whether or not any of the available internal
zero air or valve options are installed.
See Section 3.4.5 for instructions for initial calibration of the T400 analyzers in their
base configuration.
See Section 3.5.4 for instructions for initial calibratio
n of T400 analyzers with IZS
Valve Options
See Section 9.3 for information regarding setup and calibration of T400 analyzers
with Z/S Valve options
.
If you are using the T400 analyzer for EPA monitoring, only the calibration method
described in Section 10 should be used.
3.4.4.1. Interferents for O
3
Measurement
The detection of O
3
is subject to interference from a number of sources including, SO
2
,
NO
2
, NO, H
2
O AND aromatic hydrocarbon meta-xylene and mercury vapor. The Model
T400 successfully rejects interference from all of these with the exception of mercury
vapor.
If the Model T400 is installed in an environment where the presence of mercury vapor is
suspected, steps should be taken to remove the mercury vapor from the sample gas
before it enters the analyzer.
For more detailed information regarding O
3
measurement interferences, see Section 13.1.4.
Note The presence of mercury vapor is highly unlikely in the types of
applications for which T400 analyzers with IZS options installed are
normally used.
