Emerson Process Management 8732 manual Message Potential Cause Corrective Action

Reference Manual

00809-0100-4663, Rev BA January 2010

DIAGNOSTIC

MESSAGES

Rosemount 8732

Problems in the magnetic flowmeter system are usually indicated by incorrect output readings from the system, error messages, or failed tests. Consider all sources in identifying a problem in your system.

Table 6-1. Rosemount 8732 Basic Diagnostic Messages

Message	Potential Cause	Corrective Action
“Fieldbus Not	Fieldbus segment is disconnected	Connect the fieldbus segment
Communicating”	Fieldbus segment power missing	Verify the segment fieldbus voltage
	Electronics failure	Replace electronics
“Sensor Processor Not	Transmitter input power (AC/DC) is	Connect the input power. If the LCD displays a message, the input power is
Communicating”	not connected	applied
	Electronics failure	Replace electronics
“Empty Pipe”	Empty Pipe	None - message will clear when pipe is full
	Wiring Error	Check that wiring matches appropriate wiring diagrams - see Appendix E:
		Universal Sensor Wiring Diagrams
	Electrode Error	Perform sensor tests C and D (see Table 6-5 on page 6-8)
	Conductivity less than 5	Increase Conductivity to greater than or equal to 5 microsiemens per cm
	microsiemens per cm
	Intermittent Diagnostic	Adjust tuning of Empty Pipe parameters
“Coil Open Circuit”	Improper wiring	Check coil drive wiring and sensor coils
		Perform sensor test A - Sensor Coil
	Other manufacturer’s sensor	Change coil current to 75 mA
		Perform a Universal Auto Trim to select the proper coil current
	Circuit Board Failure	Replace Rosemount 8732 Electronics
	Coil Circuit OPEN Fuse	Return to factory for fuse replacement
“Auto Zero Failure”	Flow is not set to zero	Force flow to zero, perform autozero
(Cycle power to clear	Unshielded cable in use	Change wire to shielded cable
messages, no changes	Moisture problems	See moisture problems in “Accuracy Section”
were made)	Empty pipe is present	Fill sensor with process fluid
“Universal Trim Failure”	No flow in pipe while performing	Establish a known flow in sensor, and perform Universal Auto-Trim
	Universal Auto Trim	calibration
	Wiring error	Check that wiring matches appropriate wiring diagrams - see “Universal
		Sensor Wiring Diagrams” on page E-1
	Flow rate is changing in pipe while	Establish a constant flow in sensor, and perform Universal Auto-Trim
	performing Universal Auto-Trim	calibration
	routine
	Flow rate through sensor is	Verify flow in sensor and perform Universal Auto-Trim calibration
	significantly different than value
	entered during Universal Auto-Trim
	routine
	Incorrect calibration number	Replace sensor calibration number with 1000005010000001
	entered into transmitter for
	Universal Auto-Trim routine
	Wrong sensor size selected	Correct sensor size setting - See “Line Size” on page 3-9
	Sensor failure	Perform sensor tests C and D (see Table 6-5 on page 6-8)
“Electronics Failure”	Electronics self check failure	Replace Electronics
“Electronics Temp Fail”	Ambient temperature exceeded the	Move transmitter to a location with an ambient temperature range of -40 to
	electronics temperature limits	165 °F (-40 to 74 °C)
“Reverse Flow”	Electrode or coil wires reverse	Verify wiring between sensor and transmitter
	Flow is reverse	Turn ON Reverse Flow Enable to read flow
	Sensor installed backwards	Re-install sensor correctly, or switch either the electrode wires (18 and 19)
		or the coil wires (1 and 2)
“Flow Rate > Sensor Limit”	Flow rate is greater than 43 ft/sec	Lower flow velocity, increase pipe diameter
	Improper wiring	Check coil drive wiring and sensor coils
		Perform sensor test A - Sensor Coil (see Table 6-5 on page 6-8)
“Digital Trim Failure”	The calibrator (8714B/C/D) is not	Review calibrator connections
(Cycle power to clear	connected properly
messages, no changes	Incorrect calibration number	Replace sensor calibration number with 1000005010000001
were made)	entered into transmitter
	Calibrator is not set to 30 FPS	Change calibrator setting to 30 FPS
	Bad calibrator	Replace calibrator
		6-3