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Reference Manual
00809-0100-4444, Rev AC
Section 9: Troubleshooting
January 2015
Tro ubles hooting
Meter output is unstable
• Medium to low conductivity
fluids (10–25
microsiemens/cm) combined
with cable vibration or 60 Hz
interference
• Eliminate cable vibration
• Move cable to lower vibration run
• Tie down cable mechanically
• Use an integral mount
• Trim electrode and coil wires - see Cable preparation on page 29
• Route cable line away from other equipment
powered by 60 Hz
• Use component cable - see Table 2-11 on page 27
• Electrode incompatibility • Check the Technical Data Sheet, Magnetic Flowmeter Material
Selection Guide (document number 00816-0100-3033), for
chemical compatibility with electrode material
• Improper grounding •Check ground wiring – see Process reference connection on page 21
for wiring and grounding procedures
• High local magnetic or electric
fields
• Move magnetic flowmeter (20–25 ft away is usually acceptable)
• Control loop improperly tuned • Check control loop tuning
• Sticky valve (look for periodic
oscillation of meter output)
•Service valve
•Sensor failure • Perform the sensor tests
(See Table 9-8 on page 168)
• Analog output loop problem • Check that the 4 to 20 mA loop matches the digital value Perform
analog output test
Table 9-7. Common Magmeter Issue (continued)
Symptom Potential cause Corrective action