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a. Set Extrapolation Alert Limit to the point, in percent, at which an extrapolation alert
will be posted.
b. Enable or disable the high and low limit alerts for temperature and density, as
desired, and click Apply.
Important
If you plan to use matrix switching, you must enable the appropriate extrapolation alerts.
Example: If Extrapolation Alert Limit is set to 5%, High Extrapolation Limit (Temperature) is
enabled, and the matrix is built for a temperature range of 40 °F to 80 °F, an
extrapolation alert will be posted if line temperature goes above 82 °F.
5. If applicable, use the Equation Selection parameter to specify the type of calculation to
be used, and click Apply.
This option is available only when Derived Variable is set to Specific Gravity.
Option Description
Specific
Gravity
Referred density is calculated from the matrix. The result is used in the specific
gravity equation. The output is specific gravity.
Baume Specific gravity is calculated as described above, and the result is used in the
°Baumé equation. The output is specific gravity and °Baumé (light or heavy).
Brix Specific gravity is calculated as described above and the result is used in the
°Brix equation. The output is specific gravity and °Brix.
Plato Specific gravity is calculated as described above, and the result is used n the
°Plato equation. The output is specific gravity and °Plato.
Twaddell Specific gravity is calculated as described above, and the result is used in the
°Twaddell equation. The output is specific gravity and °Twaddell.
6. Enable or disable Matrix Switching as desired, and click Apply.
When matrix switching is enabled and an extrapolation alert occurs, the transmitter
automatically switches from the matrix in Slot 1 to the matrix in Slot 2, or vice versa.
This occurs only if no extrapolation alert would be generated by the other matrix.
Matrix switching is not applicable to any other slots.
Related information
Using equations to calculate specific gravity, °Baumé, °Brix, °Plato, and °Twaddell
Matrix switching
Select the active concentration matrix using ProLink III
You must select the concentration matrix to be used for measurement. Although the
transmitter can store up to six concentration matrices, only one matrix can be used for
measurement at any one time.
1. Choose Device Tools > Configuration > Process Measurement > Concentration Measurement.
Configure process measurement
Configuration and Use Manual 73