Teledyne 6200T - Sulfides Analyzer - Manual (Page 69)

6200T Total Sulfur Analyzer Getting Started
Teledyne Analytical Instruments 69
 remotely through the RS-232/485 serial I/O ports (refer to Appendix A-6
for the appropriate commands)
Sources of zero and span gas must be capable of supplying at least 1.55 L/min.
(maximum 2.5L/min). Both supply lines should be vented outside of the analyzer’s
enclosure. In order to prevent back-diffusion and pressure effects, these vent lines
should be between 2 and 10 meters in length.
3.3.2.4. Pneumatic Layout for Internal Zero/Span (IZS) Gas Generator Option
Figure 3-20 shows the internal, pneumatic connections for the analyzer with the IZS
option installed.
EXHAUST TO OUTER LAYER
OF KICKER
VA
CU
UM MANI
F
O
L
D
CRITICAL
FLOW
ORIFICE
CRITICAL
FLOW
ORIFICE
Z
E
RO AIR
S
CRUBB
E
R
SAMPLE/CAL
VALVE
Chassis EXHAUST GAS
OUTLET
SAMPLE GAS
INLET
KICKER EXHAUST
TO PUMP
HYDROCARBON
SCRUBBER
(KICKER)
ZERO AIR INLET
UV
LAMP
PMT
SAMPLE
CHAMBER
FLOW
SENSOR
FLOW / PRESSURE
SENSOR PCA
SAMPLE
PRESSURE
SENSOR
PUMP
IZS
Permeation
Tube
SO
2
Source
ZERO/SPAN
VALVE
SA
M
P
L E
F
IL
T
ER
Figure 3-20: Pneumatic Layout with IZS Options
The internal zero air and span gas generator (IZS) option includes a heated enclosure
(Section 3.3.2.5) for a permeation tube (permeation tube must be purchased separately;
see Section 1.4, in SO
2
IZS Permeation Tubes option), an external scrubber (Section
3.3.2.7) for producing zero air and a set of valves for switching between the sample gas
inlet and the output of the zero/span subsystem, functionally very similar to the valves
included in the zero/span valve option.
Table 3-11 describes the operational state of the valves associated with the IZS option
during the analyzer’s various operating modes.
Table 3-11: IZS Valve Operating States
MODE VALVE CONDITION
SAMPLE
Sample/Cal Open to SAMPLE inlet
Zero/Span Open to ZERO AIR inlet