
Reference Manual
00809-0100-4716, Rev JA
May 2008
4-23
Rosemount 3095 MultiVariable
FIELDBUS
XD_SCALE and OUT_SCALE
The XD_SCALE and OUT_SCALE each include four parameters: 0%, 100%,
engineering units, and precision (decimal point). 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 sensor
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.
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:
When the engineering units of the XD_SCALE are selected, this causes
the engineering units of the PRIMARY_VALUE_RANGE in the Transducer
Block to change to the same units. THIS IS THE ONLY WAY TO CHANGE
THE ENGINEERING UNITS IN THE SENSOR TRANSDUCER BLOCK,
PRIMARY_VALUE_RANGE parameter.
Pressure (Channels 1 and
2)
Temperature (Channels 3
and 4)
Mass Flow (Channel 5)
Pa
°
C
lb
m
/sec
kPa
°
F
lb
m
/min
bar
K
lb
m
/hour
mPa
lb
m
/day
mbar
kg/sec
torr
kg/min
atm
kg/hour
psi
grams/sec
g/cm
2
grams/min
kg/cm
2
grams/hour
inH
2
O at 68 °F
StdCuFt/sec
mmH
2
O at 68
°F
StdCuFt/min
in.H
2
O at 4 °F
StdCuFt/hour
mmH
2
O at 4 °F
StdCuFt/day
ftH
2
O at 68
°F
StdCuM/hour
inHg at 0 °C
StdCuM/day
mmHg at 0 °C
NmlCuM/hour
NmlCuM/day
Summary of Contents for Rosemount 3095
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