Teledyne GFC-7001E - Trace CO Analyzer - Manual (Page 71)

Optional Hardware and Software Model GFC7001E Carbon Dioxide Analyzer
Teledyne Analytical Instruments 71
5.6.5. ZERO/SPAN/SHUTOFF WITH INTERNAL ZERO AIR SCRUBBER
(OPTION 50E)
5.6.5.1. Internal Pneumatics (OPT 50E)
Figure 5-9: Internal Pneumatic Flow OPT 50E – Zero/Span/Shutoff Valves with Internal Zero Air
Scrubber
Table 5-4: Zero/Span Valve Operating States for Option 50E
Mode Valve Condition
SAMPLE
(Normal
State)
Sample/Cal Open to SAMPLE inlet
Zero/Span Open to internal ZERO AIR scrubber
Shutoff Valve Closed
ZERO CAL
Sample/Cal Open to zero/span valve
Zero/Span Open to internal ZERO AIR scrubber
Shutoff Valve Closed
SPAN CAL
Sample/Cal Open to ZERO/SPAN valve
Zero/Span Open to SHUTOFF valve
Shutoff Valve Open to PRESSURE SPAN inlet