Emerson 3000 manual World Class

World Class 3000

Instruction Manual

Appendix A Rev. 3.6
July 1998	A

Table A-2. Fault Finding (Continued)

Symptom Check Fault Remedy

2.System responds to oxygen concentration changes but does not give correct indication

	Good response, with	Recorder or remote	Calibration error	Recalibrate recorder or
	incorrect indication	indicator		indicator. Reference Re-
				corder Instruction Manual.
		System calibration	Calibration error	Recalibrate system.
		Probe mounting and con-	Air ingress into duct	Stop air leaks or resite
		dition of duct		probe.
		Cell mV input to	Failure of electronics	Check electronics
		electronics		package.
3.	System does not give	Calibration gas input port	Blocked port	Clean port. If the flue gas
	accurate indication of			is condensing in the cali-
	applied calibration gas			bration gas line, insulate
				the back of the probe.
				Make sure that the cali-
				bration gas line is capped
				between calibrations, or a
				check valve is installed.
		Ceramic diffusion element	Diffusion element cracked,	Replace diffusion element.
			broken, or missing
4.	System takes a long	Diffusion element	Plugged diffusion element	Change diffusion element
	time to return to flue			or snubber diffusion
	gas value after calibra-			element.
	tion gas is turned off

Rosemount Analytical Inc. A Division of Emerson Process Management Appendices A-13