Configuring Scaled Variable - Emerson Rosemount 2088 Reference Manual

Reference Manual
00809-0100-4108, Rev BA
Configuring alarm and saturation levels using local operator
interface
Refer to
Figure 2-11. Configuring alarm and saturation with local operator interface
VIEW CONFIG
ZERO TRIM
UNITS
RERANGE
LOOP TEST
DISPLAY
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2.8.2

Configuring scaled variable

The Scaled Variable configuration allows the user to create a relationship/conversion between
the pressure units and user-defined/custom units. There are two use cases for Scaled Variable.
The first use case is to allow custom units to be displayed on the transmitter's LCD display/LOI
Display. The second use case is to allow custom units to drive the transmitter's 4-20 mA output.
If the user desires custom units to drive the 4-20 mA (1-5 Vdc) output, Scaled Variable must be
re-mapped as the primary variable. Refer to
The Scaled Variable configuration defines the following items:
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Configuration
Figure 2-11 for instructions to configure alarm and saturation levels.
Scaled Variable units - Custom units to be displayed.
Scaled data options - Defines the transfer function for the application
Pressure value position 1 - Lower known value point with consideration of linear offset.
Scaled Variable value position 1 - Custom unit equivalent to the lower known value
point.
Pressure value position 2 - Upper known value point
Scaled Variable value position 2 - Custom unit equivalent to the upper known value
point
Linear offset - The value required to zero out pressures effecting the desired pressure
reading.
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CALIBRAT
DAMPING
TRANSFER FUNCT
SCALED VARIAB
ASSIGN PV
TAG
ALARM SAT VALUES ALARM SAT VALUES
PASSWORD
SIMULATE
HART REV
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"Re-mapping device variables" on page
Section 2: Configuration
March 2014
ALARM SAT VALUES
ROSEMOUNT VALUES
NAMUR VALUES
OTHER VALUES
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