Emerson Rosemount 5402 Reference Manual page 331

Analog-Input Block
October 2018
Indirect
Select indirect when the desired output is a calculated measurement based on the transmitter
measurement (Level, Distance, Level Rate, Signal Strength, Volume, and Internal Temperature). The
relationship between the transmitter measurement and the calculated measurement will be linear.
Indirect square root
Select indirect square root when the desired output is an inferred measurement based on the
transmitter measurement and the relationship between the sensor measurement and the inferred
measurement is square root (for example, level).
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. The supported units are:
Table I-3. Length
Display
m
cm
mm
ft
in
Analog-Input Block
00809-0100-4026, Rev KC
Description
meter
centimeter
millimeter
feet
inch
Reference Manual
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