Emerson Rosemount 2240S, Reference Manual, Page: 84 / 194

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Reference Manual
00809-0100-2240, Rev DA
Configuration/Operation
October 2017
Configuration/Operation
XD_SCALE and OUT_SCALE
The XD_SCALE and OUT_SCALE each include three parameters: 0%, 100%, and engineering units. Set
these based on the L_TYPE:
L_TYPE is Direct
When the desired output is the measured variable, set the XD_SCALE to represent the operating range of
the process. Set OUT_SCALE to match XD_SCALE.
L_TYPE is Indirect
When an inferred measurement is made based on the sensor measurement, set the XD_SCALE to
represent the operating range that the sensor will see in the process. Determine the inferred
measurement values that correspond to the XD_SCALE 0 and 100% points and set these for the
OUT_SCALE.
L_TYPE is Indirect Square Root
When an inferred measurement is made based on the transmitter measurement and the relationship
between the inferred measurement and sensor measurement is square root, set the XD_SCALE to
represent the operating range that the sensor will see in the process. Determine the inferred
measurement values that correspond to the XD_SCALE 0 and 100% points and set these for the
OUT_SCALE.
Engineering units
Note
To avoid configuration errors, only select Engineering Units for XD_SCALE and OUT_SCALE that are
supported by the device (see
“Supported units” on page 176 ).