Emerson Micro Motion SGM Series - Page 149

a. Enter the values to be used for the constants: A, B, X, Y.
b. Enter the values to be used for a, b, c, d, e, and f.
For these terms:
• You can specify a constant value.
• You can specify a process variable. If you choose this, the current value of the
process variable is used in the calculation.
Important
User-defined calculations are performed using the meter's internal measurement units.
Therefore:
• If a constant represents a process variable, you must enter its value in the internal
measurement units.
• If a constant will be used to modify a process variable, you must use the internal
measurement units to derive the constant.
3. If you selected User-Defined Calculation 2:
a. Enter the values to be used for the constants: A, B, C.
b. Enter the value to be used for t.
For this term:
• You can specify a constant value.
• You can specify a process variable. If you choose this, the current value of the
process variable is used in the calculation.
Important
User-defined calculations are performed using the meter's internal measurement units.
Therefore:
• If a constant represents a process variable, you must enter its value in the internal
measurement units.
• If a constant will be used to modify a process variable, you must use the internal
measurement units to derive the constant.
4. Enter a label to be used for the output of the user-defined calculation (the new
process variable).
5. (Optional) Set up a reporting method for the new process variable.
The new process variable can be configured as a display variable or a HART variable,
or assigned to an mA output. It can also be read using digital communications.
Important
The output of the user-defined calculation is based on internal measurement units for process
variables. You may need to convert this value to the configured units before using it in your
application or process.
Measurement support
Configuration and Use Manual 141