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 density reading from the device.
a. Ensure that line temperature and line pressure are at typical operating levels.
b. Record the line temperature and line pressure.
c. Record the measured density.
2. Immediately after the previous step, take a sample from a location as close to the
device as possible.
3. Using the external measurement method, measure the density of the sample at line
temperature and line pressure.
4. Use the following equation to calculate an appropriate value for Density Offset or
Density Meter Factor.
ρ
Lab
=
(
ρ
Line
× DensityMeterFactor
)
+ DensityOffset
Tip
In most cases, you will calculate and set only one parameter. Follow the guidelines
established for your site.
5. If you are using the offset to adjust density measurement, set Density Offset to the
calculated value.
• Using the display: Not available
• Using ProLink III: Device Tools > Configuration > Process Measurement > Line Density >
Density Offset
• Using the Field Communicator: Configure > Manual Setup > Measurements > Density >
Density Offset
The default value for Density Offset is 0. The range is unlimited.
6. If you are using the meter factor to adjust density measurement, set Density Meter
Factor to the calculated value.
• Using the display: OFF-LINE MAINT > OFF-LINE CAL > DENS MTR F
• Using ProLink III: Device Tools > Configuration > Process Measurement > Line Density >
Density Meter Factor
• Using the Field Communicator: Configure > Manual Setup > Measurements > Density >
Meter Factor
The default value for Density Meter Factor is 1.0. The recommended range is 0.8 to 1.2.
If your calculated meter factor is outside this range, contact Micro Motion customer
service.
Measurement support
Configuration and Use Manual 117
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