To identify and resolve problems as effectively as possible, work through the following list
of suggestions:
• If this is a first installation:
- Verify the power wiring and power supply.
- Verify the output wiring. The outputs must be powered externally.
- Verify the grounding.
- Verify cable shielding.
- Perform loop tests for each output.
- Check the sensor installation and orientation. Ensure that it is appropriate for
your application.
- Ensure that the installation meets temperature and/or pressure requirements.
• Check for active status alerts and follow the recommendations.
• If the device appears to be functioning correctly, but the process data is not
acceptable, review the symptoms and suggestions in the following sections:
- Density measurement problems (see Section 10.7)
- Temperature measurement problems (see Section 10.8)
- API referral problems (see Section 10.9)
- Concentration measurement problems (see Section 10.10)
- Velocity measurement problems (see Section 10.11)
• If the device appears to be functioning correctly, but the control loop is not
performing as expected:
- Verify the output wiring.
- Ensure that all external devices are operational, are receiving data, and are
configured appropriately.
- Use sensor simulation to test boundary conditions and system response.
10.2 Check power supply wiring
If the power supply wiring is damaged or improperly connected, the transmitter may not
receive enough power to operate properly.
Prerequisites
You will need the installation manual for your transmitter.
Procedure
1. Use a voltmeter to test the voltage at the transmitter’s power supply terminals.
• If the voltage is within the specified range, you do not have a power supply
problem.
Troubleshooting
136 Micro Motion
®
Compact Density Meters (CDM)
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