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- Minimum difference of 0.1 g/cm
3
between the density of the D4 fluid and the
density of the D3 fluid. The density of the D4 fluid must be greater than the
density of the D3 fluid.
- Minimum difference of 0.1 g/cm
3
between the density of the D4 fluid and the
density of water. The density of the D4 fluid may be either greater or less than
the density of water.
• Before performing the calibration, record your current calibration parameters. You
can do this by saving the current configuration to a file on the PC. If the calibration
fails, restore the known values.
Procedure
See Figure 9‐5.
D3 or D3 and D4 density calibration using ProLink IIIFigure 9-5:
Enter density of D3 fluid
D3 calibration
Close shutoff valve
downstream from sensor
Fill sensor with D3 fluid
Done
Device Tools >
Calibration >
Density Calibration >
Density Calibration – Point 3
Close
Start Calibration
Enter density of D4 fluid
D4 calibration
Fill sensor with D4 fluid
Device Tools >
Calibration >
Density Calibration >
Density Calibration – Point 4
Close
Start Calibration
9.6.3 Perform a D3 or D3 and D4 density calibration using the
Field Communicator
Prerequisites
• During density calibration, the sensor must be completely filled with the calibration
fluid, and flow through the sensor must be at the lowest rate allowed by your
application. This is usually accomplished by closing the shutoff valve downstream
from the sensor, then filling the sensor with the appropriate fluid.
Measurement support
Configuration and Use Manual 137