Emerson Rosemount 8732 manual Potential Cause Corrective Action

Reference Manual

00809-0100-4665, Rev AA August 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

	Local Display Error
Message	Message (English)	Potential Cause	Corrective Action
“Profibus Not	Profibus Not	Profibus segment is disconnected	Connect the Profibus segment
Communicating”	Communicating	Profibus segment power missing	Verify the segment Profibus voltage
		Electronics failure	Replace electronics
“Sensor Processor Not	Sensor Comm Err	Transmitter input power (AC/DC) is not	Connect the input power. If the LCD displays a message,
Communicating”		connected	the input power is applied
		Electronics failure	Replace electronics
“Empty Pipe Detected”	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 microsiemens	Increase Conductivity to greater than or equal to 5
		per cm	microsiemens per cm
		Intermittent Diagnostic	Adjust tuning of Empty Pipe parameters
“Coil Drive Open	Coil Open Ckt	Improper wiring	Check coil drive wiring and sensor coils
Circuit”			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	Auto Zero Fail	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”	Univ Trim Fail	No flow in pipe while performing	Establish a known flow in sensor, and perform Universal
		Universal Auto Trim	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
		performing Universal Auto-Trim routine	Auto-Trim calibration
		Flow rate through sensor is	Verify flow in sensor and perform Universal Auto-Trim
		significantly different than value	calibration
		entered during Universal Auto-Trim
		routine
		Incorrect calibration number entered	Replace sensor calibration number with
		into transmitter for Universal Auto-Trim	1000005010000001
		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 Fail	Electronics self check failure	Replace Electronics
“Electronics	Temp Out of Rng	Ambient temperature exceeded the	Move transmitter to a location with an ambient
Temperature Out of		electronics temperature limits	temperature range of -40 to 165 °F (-40 to 74 °C)
Range”
“Reverse Flow	Reverse Flow	Electrode or coil wires reverse	Verify wiring between sensor and transmitter
Detected”		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)
“Sensor Hi Limit	Flow >Sens limit	Flow rate is greater than 43 ft/sec	Lower flow velocity, increase pipe diameter
Exceeded”		Improper wiring	Check coil drive wiring and sensor coils
			Perform sensor test A - Sensor Coil (see Table 6-5 on
			page 6-8)
			6-3