Check Grounding; Check For Radio Frequency Interference (Rfi) - Emerson Micro Motion LNG Series Configuration And Use Manual

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10.7

Check grounding

The sensor and the transmitter must be grounded.
Prerequisites
You will need:
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Procedure
Refer to the sensor and transmitter installation manuals for grounding requirements and
instructions.
10.8

Check for radio frequency interference (RFI)

Procedure
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Configuration and Use Manual
• If there is no power, continue with this procedure.
Before inspecting the power supply wiring, disconnect the power source.
CAUTION!
If the transmitter is in a hazardous area, wait five minutes after disconnecting the
power.
Ensure that the terminals, wires, and wiring compartment are clean and dry.
Ensure that the power supply wires are connected to the correct terminals.
Ensure that the power supply wires are making good contact, and are not clamped
to the wire insulation.
Reapply power to the transmitter.
CAUTION!
If the transmitter is in a hazardous area, do not reapply power to the transmitter with
the housing cover removed. Reapplying power to the transmitter while the housing
cover is removed could cause an explosion.
Test the voltage at the terminals.
If there is no power, contact Micro Motion customer service.
Installation manual for your sensor
Installation manual for your transmitter (remote-mount installations only)
Use shielded cable between the output and the receiving device.
- Terminate the shielding at the receiving device. If this is impossible, terminate
the shielding at the cable gland or conduit fitting.
Troubleshooting
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