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Reference Manual
00809-0100-4444, Rev AC
Section 9: Troubleshooting
January 2015
Troubleshooting
9.3.3 Remote wiring
1. The electrode signal and coil drive wires must be separate cables, unless Rosemount
specified combo cable is used. See 2.12 Wiring the transmitter.
2. The electrode signal wire and coil drive wire must be twisted shielded cable.
Rosemount recommends 20 AWG twisted shielded cable for the electrode signal and
14 AWG twisted shielded cable for the coil drive. See 2.12 Wiring the transmitter.
3. See Appendix C Approval Information regarding wiring installation requirements.
4. See Appendix D Wiring Diagrams for component and/or combination cable wiring.
5. Verify there is minimal exposed wiring and shielding. Less than 1 inch (25 mm) is
recommended.
6. The single conduit that houses both the electrode signal and coil drive cables should
not contain any other wires. This includes wires from other magmeters.
Note
For installations requiring intrinsically safe electrodes, the signal and coil drive cables must be
run in Individual conduits.
9.3.4 Process fluid
1. The process fluid should have a minimum conductivity of 5 microSiemens/cm (5 micro
mhos/cm).
2. The process fluid must be free of air and gases.
3. The sensor must be full of process fluid.
4. The process fluid must be compatible with the wetted materials - liner, electrodes,
ground rings, and lining protectors. Refer to the Rosemount Technical Note titled
“Rosemount Magnetic Flowmeter Material Selection Guide” (00816-0100-3033)
for
details.
5. If the process is electrolytic or has cathodic protection, refer to the Rosemount
Technical Note titled “Installation and Grounding of Magmeters in Typical and Special
Applications” (00840-2400-4727) for special installation requirements.