Pneumatic Flow: Internal Zero/Span (Izs) Valve Option; Figure 2-20. T400 Pneumatic Diagram With Internal Zero/Span (Izs) Option (Opt50G); Table 2-7. Internal Zero/Span Valve Operating States For Option 50G - Teledyne T400 User Manual

2.3.3.3 PNEUMATIC FLOW: INTERNAL ZERO/SPAN (IZS) VALVE OPTION

SAMPLE
GAS INLET
SPAN GAS
INLET
ZERO AIR
INLET
Charcoal
DRY AIR
Scrubber
INLET
& Filter
EXHAUST
GAS
OUTLET
PUMP

Figure 2-20. T400 Pneumatic Diagram with Internal Zero/Span (IZS) Option (OPT50G)

Table 2-7. Internal Zero/Span Valve Operating States for Option 50G

The state of the Sample/Cal valves can be controlled:
Manually via the analyzer's front panel;
•
By activating the instrument's AutoCal feature (See Section 4.3);
•
Remotely by using the External Digital I/O Control Inputs (See Section 4.2.2.1)
•
48
Sample/Cal
Valve
O Generator
3
Flow / Pressure
Sensor PCA
Mode Valve
Sample/Cal Valve
SAMPLE
Ozone Generator
Sample/Cal Valve
ZERO CAL
Ozone Generator
Sample/Cal Valve
SPAN CAL
Ozone Generator
Teledyne API – Model T400 O
Particulate
O
3
Filter
Sample Gas
Flow Control
SAMPLE
PRESSURE
SENSOR
O FLOW
3
SENSOR
Condition
Open to SAMPLE inlet
OFF
Open to Ozone Generator
OFF
Open to Ozone Generator
ON at intensity level set by user
Analyzer
3
INSTRUMENT CHASSIS
Scrubber
Measure/
Reference
Valve
083730400A DCN8130