Calibration Photometer System; Figure 4-1. 49Iq Connected As Calibrator - Thermo Scientific 49iQ Instruction Manual

Calibration
Equipment Required
Calibration
Photometer System
4-2 49iQ Instruction Manual
Note An important requirement for the calibration photometer operation
is that the zero air used to reference the photometer come from the same
source as the zero air used in the ozonator. This is to effectively cancel
impurities present in the zero air source.
A UV photometer calibration system which includes an ozone generator,
an output port or manifold, a photometer, and a source of zero air is
required. The Thermo Scientific 49iQ Ozone Photometric Primary
Standard satisfies the calibration photometer system requirement in a single
convenient package. In addition, the 49iQ can be modified to operate as a
calibration photometer by removing the ozone scrubber and plumbing zero
air into the common port of the ozone-free solenoid valve, as shown in
Figure 4–1. If the 49iQ is modified to operate as a calibration photometer,
it must be dedicated for calibration and not be used for monitoring ozone
at any time.
Figure 4–1. 49iQ Connected as Calibrator
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