TELEDYNE API T703U - Calibration and Verification; Verifying;Calibrating the O Photometer; Setup for Verifying and Calibrating the O

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6. CALIBRATION AND VERIFICATION
Basic electronic calibration of the Calibrator is performed at the factory.
Normally there is no need to perform this factory calibration in the field however,
the performance of several of the instrument‟s key subsystems should be verified
periodically and if necessary adjusted. These subsystems are:
 O
3
Photometer: The O
3
photometer performance should be periodically
verified against an external standard (see Section 6.1).
 O
3
Generator: The O
3
generator should be periodically calibrated (see
Section 6.2).
6.1. VERIFYING/CALIBRATING THE O
3
PHOTOMETER
The accuracy of calibration gas produced by the T703 depends entirely on the
accuracy of the photometer; therefore, it is very important that the photometer is
operating properly and accurately.
The verification procedure can be performed using the instruments internal O
3
generator (see Figure 6-1) or an external source of O
3
(see Figure 6-2). In either
case, an external source of zero air (such as a Teledyne API‟s Model 701 Zero
Air Generator) is required.
SETUP FOR VERIFYING AND CALIBRATING THE O
3
6.1.1.
PHOTOMETER
Note
This operation requires an external reference photometer.
07223D DCN7107