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4.1. BASIC AND ZERO/SPAN VALVE OPTION CONFIGURATIONS
CAUTION
Sample and calibration gases should only come into contact with PTFE
(Teflon), FEP, glass, stainless steel or brass.
Do NOT operate without first removing dust plugs from rear panel fixtures.
NOTE
To prevent dust from entering the gas flow channels, your analyzer was shipped with small
plugs inserted into each of the pneumatic fittings on the back panel. Remove these dust
plugs and store for future use before proceeding.
Figure 4-2 illustrates the most common configuration for gas supply and exhaust lines to
the Model T360U Analyzer. Figure 4-3 illustrates the pneumatic connections for optional
configuratio
n with zero/span valves. Table 4-1 describes the pneumatic ports.
Note that the flowmeter
could also be configured upstream of the instrument. Since most
flowmeters are calibrated at ambient pressure, ensure that the flow going through the flow
meter is at ambient pressure, when it is placed upstream.
Needle valve,
set flow to 800
cc/min (+/- 10%)
Chassis
Sam
p
l
e
Zero
Exhaus
t
Vent Span
Pressure Span
To Pur
g
e
Sample/
Cal gas
From Purge
Flowmeter
Pressure
regulator (set
to 10-15 psig
output)
10-30 psig
CO2 free
g
as
Figure 4-2. Pneumatic Connections–Basic Configuration