Calibration
Calibration Procedure
4-8
49iQ Instruction Manual
Thermo Scientific
8.
After completion of test, reconnect ozonator and leak check following
the “
Leak Test
” procedure in the “
Maintenance
” chapter.
Note
If an ozone analyzer is available in addition to the two ozone
photometers being checked for intercomparability, an easier
intercomparability check is to calibrate the ozone analyzer against each
photometer individually and then compare the two ozone calibration
curves.
▲
If a calibration photometer other than a 49iQ Primary Standard or
modified 49iQ is being used, follow the checkout procedure given in the
Manual for the calibration photometer, or follow the procedure in the
Technical Assistance Document.
To generate data of the highest confidence, it is recommended that a
multipoint calibration be performed:
●
every three months
●
any time any major disassembly of components is performed
Connect the 49iQ to the manifold on the output of the ozonator, as shown
in
Figure 4–2
. If an optional sample line filter is used, the calibration must
be performed through this filter. Ensure that the flow rate into the output
manifold is greater than the total flow required by the calibration
photometer, analyzer, and any other flow demand connected to the
manifold.
Figure 4–2.
Calibration Flow Schematic
Calibration
Procedure
Connect the Instrument
Summary of Contents for 49iQ
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