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• Perform the D3 calibration if you have one calibrated fluid.
• Perform both the D3 and D4 calibrations if you have two calibrated fluids (other
than air and water). The calibrations must be performed without interruption, in the
order shown. Make sure that you are prepared to complete the process without
interruption.
9.6.1 Perform a D3 or D3 and D4 density calibration using
ProLink II
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.
• For D3 density calibration, the D3 fluid must meet the following requirements:
- Minimum density of 0.6 g/cm
3
- Minimum difference of 0.1 g/cm
3
between the density of the D3 fluid and the
density of water. The density of the D3 fluid may be either greater or less than
the density of water.
• For D4 density calibration, the D4 fluid must meet the following requirements:
- Minimum density of 0.6 g/cm
3
- 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 9‐4.
Measurement support
Configuration and Use Manual 135