Teledyne 9110T Relay PCA Status LED’s, Color Function Status When Lit Status When Unlit

Model 9110T NOx Analyzer					Principles of Operation
			Table 13-4: Relay PCA Status LED’s
	LED	Color	Function	Status When Lit	Status When Unlit
				(Energized State)	(Default State)
	D1	Red	Watchdog Circuit	Cycles ON/OFF every 3 Seconds
				under direct control of the analyzer’s CPU.
	D2	Yellow	Reaction Cell Heater	Heating	Not Heating
	D3	Yellow	NO2  NO Converter Heater	Heating	Not Heating
	D4			SPARE
	D51	Yellow	Internal Span Gas Generator	Heating	Not Heating
			Perm Tube Oven Heater
	D6			SPARE
	D7	Green	Zero/Span Valve	Valve OPEN to span gas flow	Valve OPEN to zero gas flow
	D8	Green	Sample/Cal Valve	Valve OPEN to	Valve OPEN to
				calibration gas flow	sample gas flow
	D9	Green	Auto Zero Valve	Sample gas flow BYPASSES	Sample gas flow is routed
				the reaction cell	THROUGH the reaction cell
	D10	Green	NO/NOx Valve	Gas flow routed THROUGH	Gas Flow BYPASSES
				NO2  NO converter	NO2  NO converter
	D112	Green	Dual Span Gas	Valve OPEN to SPAN 1	Valve OPEN to SPAN2 inlet
			Select Valve	gas inlet
	D123	Green	Pressurized Span	Span gas flow SHUTOFF	Span gas flow OPEN
			Shutoff Valve
	D134	Green	Pressurized Zero	Zero gas flow SHUTOFF	Zero gas flow OPEN
			Shutoff Valve
D14 - 16				SPARE
1	Only active when the optional internal span gas generator is installed.
2	Only active when the dual pressurized span option is installed.
3	Only active when one of the pressurized span gas options is installed.
4	Only active when one the pressurized zero gas option is installed.

Teledyne Analytical Instruments 347