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System Configuration Manual
300510EN, Rev AA
December 2010
7-7
Rosemount Raptor
Section 7. Service Functions
7.3.3 User Defined
Individual
Formula
When using User Defined Individual Formula, a mathematical formula is used
for each individual temperature element:
R=R
0
*(1+A
N
*T+B
N
*T
2
+C
N
*T
3
), where
• R is the resistance at temperature T
•R
0
is the resistance at zero degrees Celsius
• A, B, and C are individual constants for each element
• N is the number of temperature sensors
To create an individual conversion formula:
1. In the 2240S MTT Temperature Sensor window, choose conversion
method User Defined Individual Formula.
2. Click the Configure User Defined Individual Formula button:
3. Enter parameters for each individual temperature element.
4. Click the OK button to store the formula in the temperature transmitter’s
database registers.