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083730400A DCN8130
Teledyne API – Model T400 O
3
Analyzer
41
2.3.2.2 PNEUMATIC CONNECTIONS: ZERO/SPAN (Z/S) OPTION
For a Model T400 photometric ozone analyzer with the optional zero/span valves, attach
the pneumatic lines as described in this section.
VENT
here if input
is pressurized
Source of
SAMPLE GAS
Removed during
calibration
MODEL 701
Zero Gas
Generator
Model 700E
Gas Dilution
Calibrator
Instrument Chassis
ZERO AIR
DRY AIR
SAMPLE
EXHAUST
SPAN
VENT
Enclosure Wall
VENT
here if output
of calibrator is not
already vented
Restrictor to regulate flow at
2 x’s analyzer gas flow
1
1
Figure 2-14. Gas Line Connections for the T400 Analyzer with Zero/Span Valve Option (OPT 50A)
The instrument’s zero air and span gas flow rate required for this option is 800 cc/min,
however, the US EPA recommends that the cal gas flow rate be at least 1600 cc/min.
S
AMPLE
G
AS
S
OURCE
Attach a sample inlet line to the
SAMPLE
inlet fitting.
•
Sample Gas pressure must equal ambient atmospheric pressure (1.0 psig)
•
In applications where the sample gas is received from a pressurized manifold, a vent must
be placed on the sample gas line. This vent line must be:
•
At least 0.2m long
•
No more than 2m long
•
Vented outside the shelter or immediate area surrounding the instrument
C
ALIBRATION
(S
PAN
)
G
AS
S
OURCE
Attach a gas line from the source of calibration gas (e.g. a Teledyne API T700 Dynamic
Dilution Calibrator) to the
SPAN
inlet.
•
Span gas can by generated by a M700E Mass Flow Calibrator equipped with a
Photometer Option or an M703E UV Photometric Ozone Calibrator.
Содержание T400
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