Figure 6-6. External Photometer Calibration Setup With Calibration Manifolds - Teledyne T750 User Manual

External O
Vent line
Max Length=3 meters
( or 10 feet)
Calibration Source
Gas connections
were presented in
the Pneumatic
Connections section
of this manual.

Figure 6-6. External Photometer Calibration Setup with Calibration Manifolds

Note
The manifold's excess gas should be vented to a suitable vent outside of the room. The
internal diameter of this vent should be of large enough 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
The photometer's Zero calibration procedures are presented in Section 6.2.2.1, followed
by the photometer's Span calibration in Section 6.2.2.2. Refer to
1. Navigate to the Utilities>Diagnostics menu.
2. Select the Bench Cal function.
083730750B DCN8606
External Zero Air
Source
3
REFERENCE
PHOTOMETER
To other calibrators or
instruments
PHOTOMETER INLET
Capped PHOTOMETER OUTLET
PHOTOMETER ZERO IN
PHOTOMETER ZERO OUT
EXHAUST
CYL
CALGAS OUT
DILUENT IN
Calibrator
The manifolds as shown in the above drawing are oriented to
simplify the drawing. The actual orientation in your setup is
with the ports facing upward. All unused ports should be
capped. A minimum of 1.1 SLPM is required for the external
zero air source.
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).
Source
Max Length=3 meters
( or 10 feet)
Capped
Must be vented with at least
3 ft of 1/4 inch tubing. If the
gas flow on this line is
≥ 5 SLPM the minimum O.D.
must be 3/8 inch
CALGAS OUT gas
outlet connection to
manifolds/instruments
109