Teledyne M300EM ZERO/SPAN/SHUTOFF VALVE OPTION 50B, Internal Pneumatics OPT 50B, Figure

Teledyne API – Technical Manual - Model 300E Family CO Analyzers Optional Hardware and Software

5.6.3.ZERO/SPAN/SHUTOFF VALVE (OPTION 50B)

This option requires that both zero air and span gas be supplied from external sources.

∙Span gas will be supplied from a pressurized bottle of calibrated CO gas.

∙A critical flow control orifice, internal to the instrument ensures that the proper flow rate is maintained.

∙An internal vent line ensures that the gas pressure of the span gas is reduced to ambient atmospheric pressure.

∙A SHUTOFF valve preserves the span gas source when it is not in use.

∙Zero gas is supplied by either an external scrubber or a zero air generator such as the Teledyne API’s M701.

5.6.3.1.Internal Pneumatics (OPT 50B)

Figure 5-5:		Internal Pneumatic Flow OPT 50B – Zero/Span/Shutoff Valves
	Table 5-2: Zero/Span Valve Operating States for Option 50B
	MODE		VALVE	CONDITION
	SAMPLE		Sample/Cal	Open to SAMPLE inlet
	(Normal		Zero/Span	Open to IZS inlet
	State)
			Shutoff Valve	Closed
			Sample/Cal	Open to ZERO/SPAN valve
	ZERO CAL		Zero/Span	Open to IZS inlet
			Shutoff Valve	Closed
			Sample/Cal	Open to ZERO/SPAN valve
	SPAN CAL		Zero/Span	Open to SHUTOFF valve
			Shutoff Valve	Open to PRESSURE SPAN Inlet

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