Pneumatic Flow: Zero/Span (Zs) Valve Option; Figure 2-19. T400 Pneumatic Diagram With Zero/Span (Zs) Option (Opt50A); Table 2-6. Zero/Span Valve Operating States For Option 50A - Teledyne T400 User Manual

2.3.3.2 PNEUMATIC FLOW: ZERO/SPAN (ZS) VALVE OPTION

SAMPLE
GAS INLET
SPAN GAS
INLET
ZERO AIR
INLET
DRY AIR
INLET
EXHAUST
GAS
OUTLET
PUMP

Figure 2-19. T400 Pneumatic Diagram with Zero/Span (ZS) Option (OPT50A)

Table 2-6. Zero/Span Valve Operating States for Option 50A

SAMPLE
ZERO CAL
SPAN CAL
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)
•
083730400A DCN8130
Sample/Cal
Valve
Zero/Span
Valve
Flow / Pressure
Sensor PCA
Sample Gas
Flow Control
Mode Valve
Sample/Cal
Zero/Span
Sample/Cal
Zero/Span
Sample/Cal
Zero/Span
Teledyne API – Model T400 O
Particulate
O Scrubber
3
Filter
SAMPLE
PRESSURE
SENSOR
O FLOW
3
SENSOR
Condition
Open to SAMPLE inlet
Open to ZERO AIR inlet
Open to ZERO/SPAN valve
Open to ZERO AIR inlet
Open to ZERO/SPAN valve
Open to SPAN GAS inlet
Analyzer
3
INSTRUMENT CHASSIS
Measure/
Reference
Valve
47