Figure 2-15. Connections To A Dual Span Gas / Zero Air Manifold - Teledyne T750 User Manual

C
ALIBRATION
The manifold's excess gas should be vented 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.
C
ONNECTING THE
M
ANIFOLD
Another type of calibration setup utilizes separate span gas and the zero air manifolds (see
Figure 3 17).
ROOF
TEE
H O TRAP
2
CAL
CYL IN
SOURCE
GAS
Teledyne API
MODEL 701
Zero Gas Generator

Figure 2-15. Connections to a Dual Span Gas / Zero Air Manifold

Note
083730750B DCN8606
M E /V
ANIFOLD XHAUST
C
ALIBRATOR TO A
SAMPLING CANE
FILTER SCREEN
SAMPLE
MANIFOLD
T750 EXHAUST outlet MUST be
vented to outside of room.
EXHAUST
CALGAS OUT
1
DILUENT IN
T750
5 SLPM
If Gas flow on this line is
1
minimum O.D. must be 3/8 inch
This set up is subject to the same notes and conditions as the
single calibration manifold described previously with the
following two exceptions:
• The T750 total gas flow rate (Cal Gas Flow Rate + Diluent Flow
Rate) out should be greater than the Total Flow requirements
of the entire system.
• The manifolds as shown in the above drawing are oriented to
simplify the drawing. Their actual orientation in your set-up is
with the ports facing upward. All unused ports must be
capped.
L
ENT INE
D S G /Z A
UAL PAN AS ERO
BLOWER / PUMP
Sample Inlet
Exhaust
Span Gas Inlet
Zero Air Inlet
Sample Inlet
Exhaust
Span Gas Inlet
Zero Air Inlet
SPAN CAL MANIFOLD
ZERO CAL MANIFOLD
≥ 5 SLPM the
C
IR ALIBRATION
VENT TO OUTSIDE OF ROOM
Teledyne API
Gas Analyzer
Teledyne API
Gas Analyzer
1
39