Thermo Scientific 49iQ, Instruction Manual

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Calibration
Calibration Photometer System Preparation
4-4 49iQ Instruction Manual Thermo Scientific
Assistance Document with the appropriate change for a time-shared, dual
cell system).
1. Calibrate an ozone analyzer using the calibration photometer. Assume
the photometer is correct.
2. Generate a stable level of ozone and with the calibrated ozone analyzer
measure and note reading as R
m
.
3. Unplug the pump of the calibration photometer from the AC power
source and plug the exhaust line and zero-air inlet line.
4. Connect the calibrated ozone analyzer to the access port on the inlet of
Cell A.
5. From the Home Screen, press Settings>Health Check>Status and
Alarms>
Intensity Check . From the Intensity Check menu, press
Intensity B Reference Gas . Wait for a steady reading and record the
intensity as R(a)
input
. Press the

button to return to the Intensity
Check screen.
6. Connect the calibrated ozone analyzer to the access port on the inlet of
cell B. From the Intensity Check menu, press
Intensity A Reference
Gas . Wait for a steady reading and record the intensity as R(b)
input
.
7. Replace access fittings used in steps 4 and 6 above and make sure they
are leak tight.
8. Connect the calibrated ozone analyzer to the access port on the outlet
of absorption cell of Cell A.
9. From the Home Screen, press Settings>Health Check>Status and
Alarms>
Intensity Check . From the Intensity Check menu, press
Intensity B Reference Gas . Wait for a steady reading and record the
intensity as R(a)
out
.
10. Connect the calibrated ozone analyzer to the access port on the outlet
of absorption cell of Cell B. From the Home Screen, press
Settings>Health Check>Status and Alarms>
Intensity Check . From the
Intensity Check menu, press Intensity A Reference Gas. Wait for a
steady reading and record the intensity as R(b)
out
.