Emerson Process Management 8732 manual High Process Noise

Rosemount 8732

Reference Manual

00809-0100-4663, Rev BA January 2010

Table 6-2. Rosemount 8732 Advanced Diagnostic Messages (Suite 1 - Option Code D01)

Message	Potential Cause	Corrective Action
Grounding/Wiring Fault	Improper installation of wiring	See “Sensor Connections” on page 2-11
	Coil/Electrode shield not	See “Sensor Connections” on page 2-11
	connected
	Improper process grounding	See “Grounding” on page 5-12
	Faulty ground connection	Check wiring for corrosion, moisture in the terminal block, and refer to
		“Grounding” on page 5-12
	Sensor not full	Verify sensor is full and empty pipe diagnostic is on
High Process Noise	Slurry flows - mining/pulp stock	Decrease the flow rate below 10 ft/s (3 m/s)
		Complete the possible solutions listed under “Step 2: Process Noise” on
		page 6-7
	Chemical additives upstream of the	Move injection point downstream of the sensor, or move the sensor
	sensor	Complete the possible solutions listed under “Step 2: Process Noise” on
		page 6-7
	Electrode not compatible with the	Refer to the Rosemount Magnetic Flowmeter Material Selection Guide
	process fluid	(00816-0100-3033)
	Air in line	Move the sensor to another location in the process line to ensure that it is
		full under all conditions
	Electrode coating	Use bulletnose electrodes
		Downsize sensor to increases flowrate above 3 ft/s (1 m/s)
		Periodically clean sensor
	Styrofoam or other insulating	Complete the possible solutions listed under “Step 2: Process Noise” on
	particles	page 6-7
		Consult factory
	Low conductivity fluids	Trim electrode and coil wires - refer to “Installation” on page 2-1
	(below 10 microsiemens/cm)

Table 6-3. Rosemount 8732 Advanced Diagnostic Messages (Suite 2 - Option Code D02)

Message	Potential Cause	Corrective Action
	Transmitter Calibration Verification	Verify pass/fail criteria
	test failed	Rerun 8714i Meter Verification under no flow conditions
		Verify calibration using 8714D Calibration Standard
		Perform digital trim
		Replace electronics board
8714i Failed	Sensor Calibration test failed	Verify pass/fail criteria
		Perform sensor test - see Table 6-5 on page 6-8
	Sensor Coil Circuit test failed	Verify pass/fail criteria
		Perform sensor test - see Table 6-5 on page 6-8
	Sensor Electrode Circuit test failed	Verify pass/fail criteria
		Perform sensor test - see Table 6-5 on page 6-8

6-4