Instrument Preparation; System Check; Ozone Loss Test - Thermo Scientific 49iQ Instruction Manual

Instrument
Preparation
Calibration
Photometer
Preparation

System Check

Ozone Loss Test

Thermo Scientific
Use the following procedure to prepare the instrument prior to calibration.
1. Turn the instrument ON.
2. Allow the instrument to stabilize for a minimum of one hour.
3. Perform the service checks in the "Maintenance" chapter.
4. Connect the 49iQ to the ozone manifold. If a PTFE particulate filter is
being used, it must be installed prior to calibration.
As indicated in the EPA Technical Assistance Document there are several
tests that should be performed prior to the use of an ozone UV photometer
as a calibrator to ensure the accuracy of the measurements. These tests
System
include:
System check
●
Ozone loss test
●
Linearity check
●
Intercomparability
●
A step-by-step checkout procedure to verify proper operation of a 49iQ
Primary Standard (or a 49iQ modified as described earlier) is as follows:
1. Turn the calibration photometer ON.
2. Turn the ozonator ON.
3. Allow the calibration photometer and ozonator to stabilize for one
hour.
4. Perform the service checks in the "Maintenance" chapter.
If the calibration photometer passes the leak test in the "Maintenance"
chapter, it is highly unlikely that the system is destroying ozone. If desired,
a rigorous test is as follows (this check follows the EPA's Technical
Calibration

Instrument Preparation

49iQ Instruction Manual 4-3