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Calibration and Verification Teledyne API T703/T703U Calibrator Operation Manual
126
Figure 6-2: Set up for Verifying Optional O
3
Photometer Using an External O
3
Generator
NOTE
The manifolds as shown in the above drawing are oriented to simplify the drawing.
All unused ports should be capped.
A Minimum of 1.1 LPM is required for the external zero air source
6.1.1.1. Calibration Manifold Exhaust/Vent Line
The manifold’s excess gas should be vented to a suitable vent outside of the room. This
vent should be of large enough internal diameter to avoid any appreciable pressure
drop, and it must be located sufficiently downstream of the output ports to assure that no
ambient air enters the manifold due to eddy currents or back diffusion.
NOTE
It is recommended that the calibration manifold’s exhaust vent have a minimum internal diameter of 3/8
inch and a maximum length of 3 meters (or 10 feet)
07223C DCN6572