affect accuracy. Extrapolation alerts are used to notify the operator that
extrapolation is occurring, and can also be used to initiate matrix switching. Each
concentration matrix has its own extrapolation alert settings.
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
Configure process measurement
64
Micro Motion
®
Compact Density Meters (CDM)
Summary of Contents for CDM100M
Page 8: ...Getting Started 2 Micro Motion Compact Density Meters CDM ...
Page 12: ...Before you begin 6 Micro Motion Compact Density Meters CDM ...
Page 20: ...Configuration and commissioning 14 Micro Motion Compact Density Meters CDM ...
Page 26: ...Introduction to configuration and commissioning 20 Micro Motion Compact Density Meters CDM ...
Page 110: ...Integrate the meter with the control system 104 Micro Motion Compact Density Meters CDM ...
Page 116: ...Operations maintenance and troubleshooting 110 Micro Motion Compact Density Meters CDM ...
Page 124: ...Transmitter operation 118 Micro Motion Compact Density Meters CDM ...
Page 194: ...Using the transmitter display 188 Micro Motion Compact Density Meters CDM ...
Page 208: ...Using ProLink III with the transmitter 202 Micro Motion Compact Density Meters CDM ...