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Reference Manual
00809-0200-4801, Rev BA
April 2007
Rosemount 3051S
3-10
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
the “Primary_Value_Range”. This is found in the Sensor Transducer Block.
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
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 (Channel 1) Temperature (Channel 2) Flow (Channel 7)
Pa °C lbm/sec
kPa °F lbm/min
bar °K lbm/hour
mPa lbm/day
mbar kg/sec
torr kg/min
atm kg/hour
psi grams/sec
g/cm2 grams/min
kg/cm2 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/min
mmH
2
O at 4 °F StdCuFt/hour
ftH
2
O at 68 °F StdCuFt/day
inHg at 0 °C StdCuM/hour
mmHg at 0 °C StdCuM/day
NmlCuM/hour
NmlCuM/day