Emerson ib-106-340cdr, oxymitterdr hazardous area in-siu oxygen probe Hazardous Area Oxymitter DR

Instruction Manual

IB-106-340CDR Original Issue January, 2002

Hazardous Area Oxymitter DR

Table 5-1. Fault Finding (Continued)

	SYMPTOM	CHECK	FAULT	REMEDY
	Heater is hot and	Recorder chart	Recorder failure	See Recorder Instruction
	T/C mV output is at			Manual.
	setpoint ±0.2 mV
		Cell mV input to elec-	No cell mV at probe	Replace cell or return
		tronics and cell mV at	when test gas applied	probe to Rosemount.
		probe head
			Probe cell mV OK but no	Check out cable con-
			input to electronics	nection.
			Cell mV satisfactory both	Check electronics pack-
			at junction box and input	age.
			to electronics - failure of
			electronics
2.	System responds to
	oxygen concentra-
	tion changes but has
	incorrect indication
	Good response, with	Recorder or remote	Calibration error	Recalibrate recorder or
	incorrect indication	indicator		indicator. Reference Re-
				corder Instruction Man-
				ual.
		System calibration	Calibration error	Recalibrate system. Re-
				place cell if necessary.
		Probe mounting and	Air ingress into duct	Stop air leaks or resite
		condition of duct		probe.
		Cell mV input to elec-	Failure of electronics	Check electronics pack-
		tronics		age.
3. Probe does not give		Test gas input port	Blocked port	Clean port. If the flue
	accurate indicationof			gas is condensing in the
	applied test gas			test gas line, insulate the
				back of the probe. Make
				sure that the test gas
				line is capped between
				calibrations, or a check
				valve is installed.
		Ceramic diffusion ele-	Diffusion element	Replace diffusion ele-
		ment broken	cracked, broken, or	ment.
			missing
4. Probe takes a long		Plugged diffusion ele-	Plugged diffusion ele-	Change diffusion ele-
	time to return to flue	ment	ment	ment or snubber diffu-
	gas value after			sion element.
	calibration gas is
	turned off
5.	Probe heater	Proper voltage heater is	Wrong heater	Change heater to proper
	temperature unstable	installed		voltage.

5-2 Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management