Table 3-12: Izs Valve Operating States - Teledyne t100 Operation Manual

Getting Started
Note
3.3.2.6. PERMEATION TUBE HEATER
60
The internal zero air and span gas generator (IZS) option includes a heated enclosure
(Section 3.3.2.6) for a permeation tube (permeation tube must be purchased separately;
see Section 1.4, in SO
2
3.3.2.8) 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 3-12 describes the operational state of the valves associated with the IZS option
during the analyzer's various operating modes.

Table 3-12: IZS Valve Operating States

MODE
SAMPLE
ZERO CAL
SPAN CAL
The state of the IZS valves can also be controlled by any of the following means:
•
Manually from the analyzer's front panel by using the SIGNAL I/O controls under
the DIAG Menu (refer to Section 5.9.1),
•
By activating the instrument's AutoCal feature (refer to Section 9.8),
•
Remotely by using the external digital control inputs (refer to Section 8.1.2 and
Section 9.7.1),
•
Remotely through the RS-232/485 serial I/O ports (refer to Appendix A-6 for the
applicable commands), or
•
Remotely via Ethernet
The permeation tube is not included in the IZS Option and must be
ordered separately. Refer to Section 1.4 for permeation tube options.
In order to keep the permeation rate constant, the IZS enclosure is heated to a constant
50 C (10° above the maximum operating temperature of the instrument). The IZS heater
is controlled by a precise PID (Proportional/Integral/Derivative) temperature control
loop. A thermistor measures the actual temperature and reports it to the CPU for control
feedback.
The IZS option includes an external zero air scrubber assembly that removes all SO
zero air source. The scrubber is filled with activated charcoal.
Teledyne API - T100 UV Fluorescence SO
IZS Permeation Tubes option), an external scrubber (Section
VALVE
Sample/Cal
Zero/Span
Sample/Cal Open to zero/span valve
Zero/Span
Sample/Cal Open to zero/span valve
Zero/Span Open to SPAN GAS inlet
CONDITION
Open to SAMPLE inlet
Open to ZERO AIR inlet
Open to ZERO AIR inlet
06807F DCN7335
Analyzer
2
the
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