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10.10 Check sensor-to-transmitter wiring
A number of power-supply and output problems may occur if the wiring between the
sensor and the transmitter is improperly connected, or if the wiring becomes damaged.
Prerequisites
You will need the installation manual for your transmitter.
Procedure
1. Before opening the wiring compartments, disconnect the power source.
CAUTION!
If the transmitter is in a hazardous area, wait five minutes after disconnecting the
power.
2. Verify that the transmitter is connected to the sensor according to the information
provided in your transmitter installation manual.
3. Verify that the wires are making good contact with the terminals.
4. Check the continuity of all wires from the transmitter to the sensor.
10.11 Check grounding
The sensor and the transmitter must be grounded.
Prerequisites
You will need:
• Installation manual for your sensor
• Installation manual for your transmitter
Procedure
Refer to the sensor and transmitter installation manuals for grounding requirements and
instructions.
10.12
Perform loop tests
A loop test is a way to verify that the transmitter and the remote device are
communicating properly. A loop test also helps you know whether you need to trim mA
outputs.
Troubleshooting
174 Micro Motion
®
9739 MVD Transmitters