Reference Manual
00809-0100-4360, Rev BA
August 2008
Rosemount 1151
C-2
Lower Range Limit (LRL)
Lowest value of the measured variable that the transmitter can be configured
to measure.
Lower Range Value (LRV)
Lowest value of the measured variable that the analog output of the
transmitter is currently configured to measure.
Multidropping
The connection of several transmitters to a single communications
transmission line. Communication between the host and the transmitters
takes place digitally with the analog output of the transmitters deactivated.
Reranging
Configuration function that changes the transmitter 4 and 20 mA settings.
Send Data
HART-based communicator command that transfers configuration data from
the hand-held communicator’s memory to the transmitter memory.
Sensor Trim
Sensor trim function in which two accurate, end-point pressures are applied
and all output is linearized between them. The selected end points should
always be equal to or outside the LRV and URV. This is also known as a Full
Trim.
Smart
Term used to describe instruments that are microprocessor-based and feature
advanced communications capabilities.
SMART FAMILY
Rosemount pressure, temperature, level, and flow instruments with
microprocessor-based digital electronics.
Span
Algebraic difference between the upper and lower range values.
Tag
Eight-character field for identifying the transmitter. The tag is stored
in the transmitter and can be changed using the HART Communicator and the
transmitter information function.
Transmitter Address
Unique number (1-15) used to identify a multidropped transmitter.
Transmitters that are not multidropped have 0 as an address.
Transmitter Security
Jumper-selectable feature that prevents accidental or deliberate changes to
configuration data.
Upper Range Limit (URL)
Highest value of the measured variable that the transmitter can be configured
to measure.
Upper Range Value (URV)
Highest value of the measured variable that the analog output of the
transmitter is currently configured to measure.
Zero Trim
A zero-based, one-point adjustment used in differential pressure applications
to compensate for mounting position effects or zero shifts caused by static
pressure.
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