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Teledyne API - T100 UV Fluorescence SO2 Analyzer Getting Started
65
zero air produces higher concentrations of SO
2
. The T100 usually has a constant
flow rate and a constant permeation rate; hence, variations in concentration can be
achieved by changing the IZS temperature.
3.3.2.7. EXTERNAL ZERO AIR SCRUBBER
The IZS option includes an external zero air scrubber assembly that removes all SO
2
from the zero air source. The scrubber is filled with activated charcoal.
3.3.2.8. PNEUMATIC LAYOUT WITH O
2
SENSOR OPTION
Figure 3-21 shows the internal, pneumatic connections for the analyzer with the
oxygen
(O
2
) sensor option installed. Pneumatically, the O
2
sensor draws a flow of 80 cm³/min in
addition to the normal sample flow rate. It is separately controlled with its own critical
flow orifice.
FLOW PRESSURE
SENSOR PCA
Chassis
with O
2
Sensor Option
EXHAUST
GAS OUTLET
UV
LAMP
PMT
REACTION
CELL
HYDROCARBON
SCRUBBER
(Kicker)
VACUUM MANIFOLD
O
2
Sensor
Flow Control
O
2
Sensor
SAMPLE
GAS INLET
PUMP
SAMPLE
PRESSURE
SENSOR
FLOW
SENSOR
Figure 3-21: Pneumatic Layout with O
2
Sensor
06807C DCN6650