Teledyne T100, Instruction Manual, Page: 64 / 404

Getting Started
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
64

Flow rate of the zero air: If the previous two variables are constant, the permeation rate of
air into the zero air stream will be constant. Therefore, a lower flow rate of 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.
3.5.4.3. 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.
3.5.5. 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
Particulate
Filter
HYDROCARBON
SCRUBBER
(Kicker)
V
A
C
U
U
M
M
A
N
IF
O
L
D
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