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Reference Manual
00809-0100-4444, Rev AC
Section 9: Troubleshooting
January 2015
Tro ubles hooting
Table 9-2. Advanced Process Diagnostic Messages
Error message Potential cause Corrective action
Improper installation of wiring • See Wiring the transmitter on page 25
Grounding/Wiring Fault
Coil/electrode shield not connected •See Wiring the transmitter on page 25
Improper process grounding • See Process reference connection on page 21
Faulty ground connection
• Check wiring for corrosion, moisture in the terminal block -see
Process reference connection on page 21
Sensor not full
• Verify sensor is full
• Enable empty pipe detection
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 Troubleshooting high
process noise on page 158
Chemical additives upstream of the
sensor
• Move injection point downstream of the sensor or move the sensor to
a new location
• Complete the possible solutions listed under Troubleshooting high
process noise on page 158
Electrode not compatible with the
process fluid
•Refer to the Rosemount Magnetic Flowmeter Material Selection Guide
(00816-0100-3033)
Gas/air in line
• Move the sensor to another location in the process line to ensure that
it is full under all conditions
Electrode coating
• Enable coated electrode etection diagnostic
• Use bullet-nose electrodes
• Downsize sensor to increase flowrate above 3 ft/s (1 m/s)
•Periodically clean sensor
Styrofoam or other insulating
particles
• Complete the possible solutions listed under Troubleshooting high
process noise on page 158
• Consult factory
Low conductivity fluids
(below 10 microsiemens/cm)
• Trim electrode and coil wires - see Sensor installation on page 14
• Use integral mount transmitter
• Set coil drive frequency to 37Hz
Electrode Coating Level 1
Coating is starting to buildup on
electrode and interfering with
measurement signal
• Schedule maintenance to clean electrode
• Use bullet nose electrodes
• Downsize sensor to increase flow rate above 3ft/s (1ms)
Process fluid conductivity has
changed
• Verify process fluid conductivity
Electrode Coating Level 2
Coating has built-up on electrode
and is interfering with measurement
signal
• Schedule maintenance to clean electrode
• Use bullet nose electrodes
• Downsize sensor to increase flow rate above 3ft/s (1ms)
Process fluid conductivity has
changed
• Verify process fluid conductivity