Note
Temperature offset is applied only to temperature data from the on-board temperature sensors
(RTD). External temperature data is not adjusted.
Prerequisites
You will need an external temperature measurement method that is highly accurate.
Ensure that your process is stable during the sampling procedure. Minimize variation in
density, temperature, flow rate, and fluid composition. Minimize aeration.
Procedure
1. Take a temperature reading from the meter.
2. Immediately after the previous step, take a sample from a location as close to the
meter as possible.
3. Using the external measurement method, measure the temperature of the sample.
4. Subtract the measured temperature value from the externally measured value.
5. Set Temperature Offset to the result.
• Using the display: Not available
• Using ProLink III: Device Tools > Configuration > Process Measurement > Line Temperature
> Temperature Offset
• Using the Field Communicator: Not available
The default value is 0. The range is unlimited.
9.5 Adjust concentration measurement with Trim
Offset
Trim Offset adjusts the meter's concentration measurement to match a reference value.
Tip
You can adjust concentration measurement by applying the trim offset only, or by applying both the
trim offset and the trim slope. For most applications, the trim offset is sufficient.
Prerequisites
You must be able to take a sample of your process fluid and obtain a laboratory
concentration value at line density and line temperature.
Procedure
1. Take a concentration reading from the meter, and record line density and line
temperature.
2. Take a sample of the process fluid and obtain a laboratory value for concentration at
line density and line temperature, in the units used by the meter.
Measurement support
128 Micro Motion
®
Compact Density Meters (CDM)
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