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Teledyne API – Technical Manual - Model 300E Family CO Analyzers Optional Hardware and Software
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/Cal Open to SAMPLE inlet
Zero/Span Open to internal ZERO AIR scrubber
SAMPLE
(Normal
State)
Shutoff Valve Closed
Sample/Cal Open to zero/span valve
Zero/Span Open to internal ZERO AIR scrubber
ZERO CAL
Shutoff Valve Closed
Sample/Cal Open to ZERO/SPAN valve
Zero/Span Open to SHUTOFF valve
SPAN CAL
Shutoff Valve Open to PRESSURE SPAN inlet
04288D DCN5752