Emerson Rosemount 5300 Series - Page 467

L_TYPE
The L_TYPE parameter defines the relationship of the transmitter measurement (level,
distance, level rate, signal strength, volume, and average temperature) to the desired
output of the AI block. The relationship can be direct or indirect root.
Direct
Select direct when the desired output will be the same as the transmitter
measurement (level, distance, level rate, signal strength, volume, and
internal temperature).
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 (e.g. 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.
Related information
Supported units
Reference Manual Analog-Input Block
00809-0100-4530 April 2019
Reference Manual 467