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. Use the following equation to calculate an appropriate value for Temperature Offset or
Temperature Slope.
t
Line
= TemperatureSlope ×
(
ρ
Line
+ TemperatureOffset
)
Tip
In most cases, you will set only one parameter. Follow the guidelines established for your site.
5. If you are using the offset to adjust temperature measurement, set Temperature Offset
to the calculated value.
• 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.
6. If you are using the slope to adjust temperature measurement, set Temperature Slope
to the calculated value.
• Using the display: Not available
• Using ProLink III: Device Tools > Configuration > Process Measurement > Line Temperature
> Temperature Slope
• Using the Field Communicator: Not available
The default value is 1.0. The recommended range is 0.8 to 1.2. If your calculated
slope is outside this range, contact Micro Motion customer service.
9.5 Perform temperature calibration
Temperature calibration establishes the relationship between the temperature of the
calibration fluids and the signal produced by the sensor.
Measurement support
122 Micro Motion
®
Fork Density Meters (FDM)
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