• Ensure that the external device and the meter are using the same measurement unit.
• For polling:
— Verify the wiring between the meter and the external device.
— Verify the HART tag of the external device.
• For digital communications:
— Verify that the host has access to the required data.
— Verify that the host is writing to the correct register in memory, using the correct data type.
Modify matrix names and labels using the Field Communicator
For convenience, you can change the name of a concentration matrix and the label used for its measurement
unit. This does not affect measurement.
Procedure
1. Choose Configure > Manual Setup > Measurements > Optional Setup > Conc Measurement >
Configure Matrix.
2. Set Matrix Being Configured to the matrix you want to modify.
3. Set Matrix Name to the name to be used for the matrix.
4. Set Concentration Unit to the label that will be used for the concentration unit.
5. If you set Concentration Unit to Special, choose Label and enter the custom label.
Modify extrapolation alerts for concentration measurement using the
Field Communicator
You can enable and disable extrapolation alerts, and set extrapolation alert limits. These parameters control
the behavior of the concentration measurement application but do not affect measurement directly.
Each concentration matrix is built for a specific density range and a specific temperature range. If line density
or line temperature goes outside the range, the transmitter will extrapolate concentration values. However,
extrapolation may affect accuracy. Extrapolation alerts are used to notify the operator that extrapolation is
occurring.
Each concentration matrix has its own extrapolation alert limits.
Procedure
1. Choose Configure > Manual Setup > Measurements > Optional Setup > Conc Measurement >
Configure Matrix.
2. Set Matrix Being Configured to the matrix you want to modify.
3. Set Extrapolation Alert Limit to the point, in percent, at which an extrapolation alert will be posted.
4. Choose Configure > Alert Setup > CM Alerts.
5. Enable or disable the high and low alerts for temperature and density, as desired.
Extrapolation alerts in action
If Extrapolation Limit is set to 5%, High Limit (Temp) is enabled, and the active matrix is built for a
temperature range of 40 °F (4.4 °C) to 80 °F (26.7 °C), a high-temperature extrapolation alert will be posted if
line temperature goes above 82 °F (27.8 °C).
Configure process measurement applications Configuration and Use Manual
April 2019 MMI-20048166
66 Micro Motion 4200 Transmitters
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