9
Needle valve,
set flow to 800
cc/min (+/- 10% )
Chassis
Sample
Zero
Exhaust
Vent Span
Pressure Span
To Purge
Sample
gas
From Pu rge
Flowme ter
Pressure
regulator, set
output to 5-10
psig
10-30 psig
CO2 free gas
Span ga s
CO2 free
gas
Pressure
Regulator ( 5-10
psig output)
Needle valve,
set flow to 800
cc/min (+/-
10%)
Pressur e
Regular (5-10
psig output)
Needle valve,
set flow to 800
cc/min (+/-
10%)
Figure 4-3. Pneumatic Connections–Configuration with Zero/Span Valve Option
Table 4-1. Model T360U Pneumatic Connections
Rear Panel Label Function
SAMPLE Connect a gas line from the source of sample gas here.
Calibration gasses are also inlet here on units without
zero/span valve option installed.
EXHAUST Connect an exhaust gas line of not more than 10 meters
long here.
PRESSURE SPAN On units with zero/span valve option installed, connect a
gas line to the source of calibrated span gas here.
VENT SPAN Not used
ZERO On units with zero/span valve option installed, attach a
gas line to the source of zero air here.
TO PURGE This inlet supplies purge air to the GFC wheel housing
Connect a source of dried air that has been scrubbed of
CO2.
FROM PURGE
This exhausts purge air from the GFC wheel housing.
Connect an exhaust gas line of not more than 10 meters
long here.