Valid values are 0000 to 6000 feet, and 0000 to 2000 meters.
3. Click Next to start the procedure.
4. Wait while the meter collects and analyzes process data.
This step should be complete in approximately 20 seconds.
5. Check the results in the Results data display.
• If all process variables passed the tests, no action is required. Click Close to exit
the wizard.
• If one or more process variables failed the test:
- For problems with Line Temperature, verify that the ambient temperature of
the meter is stable, and that the meter temperature has stabilized in the test
location. Then retry the Known Density Verification procedure.
- For problems with Verification Time Period Signal or Drive Gain, ensure that
the meter is clean and dry. Then retry the Known Density Verification
procedure.
- If the Known Density Verification procedure continues to fail, contact
Micro Motion customer service.
9.2 Adjust density measurement with Density Offset
or Density Meter Factor
You can adjust the reported density measurement by modifying the value for Density Offset
or Density Meter Factor. The measured density value is always multiplied by the density meter
factor. The density offset is always added to the result.
The default value for Density Meter Factor is 1.0. The default value for Density Offset is 0.
Accordingly, the default values have no effect on the reported density value.
Important
Density Offset and Density Meter Factor improve measurement accuracy only when the line temperature
and line pressure of the sample are close to the line temperature and line pressure of the process.
Tip
If the density offset calibration procedure is available, use it to calculate a density offset value that is
corrected to reference temperature and reference pressure. Density offset calibration is the
preferred method to adjust density measurement.
Restriction
You cannot enter a density offset from the display. If you want to change the density offset manually,
you must use ProLink III or the Field Communicator.
Prerequisites
You will need an external density measurement method that is highly accurate.
Measurement support
116 Micro Motion
®
Fork Density Meters (FDM)
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