Intercomparability Test - Thermo Scientific 49iQ Instruction Manual

Intercomparability
Thermo Scientific
5. From the Home Screen, press Settings>Health Check>Status and
Alarms>Photometer Bench to get the current pressure reading and
current instrument temperature reading.
6. Compute C(A) and C(B) from the following equation.
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C
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This value should agree with the value noted in the Home Screen. Note
that the concentration determined in this manner does not correct for lamp
fluctuation and thus will be noisier than the concentration determined in
the Home Screen.
To perform an intercomparability test of a 49iQ Primary Standard, it may
be necessary to have the 49iQ Primary Standard sample ozone from a
Test
source other than the one contained in the instrument. Use the following
procedure to accomplish this.
1. Set gas mode to zero.
2. At the PTFE distribution manifold, disconnect the line from the
ozonator to the manifold and cap fitting.
3. Cap bulkhead labeled VENT.
4. Connect PTFE line from bulkhead labeled OZONE to manifold of
ozone source being utilized for intercomparability study.
5. Make sure the same zero air is feeding both the 49iQ Primary Standard
and the second photometer being used in study.
6. If it is desired to hold usage of zero air to a minimum, adjust the
pressure regulator feeding the ozonator to zero pressure.
7. Perform intercomparability test.
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10 760 273
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308 37.84 273P
Calibration Photometer System Preparation
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49iQ Instruction Manual
Calibration
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