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Reference Manual
00809-0100-4444, Rev AC
Appendix A: Implementing a Universal Transmitter
January 2015
Implementing a Universal Transmitter
A.2.3 Connecting sensors of other manufacturers
Before connecting another manufacturer’s sensor to the transmitter, it is necessary to perform
the following functions.
1. Turn off the AC power to the sensor and transmitter. Failure to do so could result in
electrical shock or damage to the transmitter.
2. Verify that the coil drive cables between the sensor and the transmitter are not
connected to any other equipment.
3. Label the coil drive cables and electrode cables for connection to the transmitter.
4. Disconnect the wires from the existing transmitter.
5. Remove the existing transmitter. Mount the new transmitter. See “Quick Installation
and Start-Up” on page 5.
6. Verify that the sensor coil is configured for series connection. Other manufacturers
sensors may be wired in either a series or parallel circuit. All Rosemount magnetic
sensors are wired in a series circuit. (Other manufacturers AC sensors (AC coils) wired
for 220VAC operation are typically wired in parallel and must be rewired in series.)
7. Verify that the sensor is in good working condition. Use the manufacturer’s
recommended test procedure for verification of sensor condition. Perform the basic
checks:
8. Check the coils for shorts or open circuits.
9. Check the sensor liner for wear or damage.
10. Check the electrodes for shorts, leaks, or damage.
11. Connect the sensor to the transmitter in accordance with reference wiring diagrams.
See Appendix A: Implementing a Universal Transmitter for specific drawings.
12. Connect and verify all connections between the sensor and the transmitter, then apply
power to the transmitter.
13. Perform the Universal Auto Trim function.
Do not connect mains or line
power to the magnetic
flowtube sensor or to the
transmitter coil excitation
circuit.