Filter
Top Products
Reference Manual
00809-0100-4808, Rev CA
June 2008
Rosemount 3051N
www.rosemountnuclear.com
Glossary
Analog Output Trim Digital Trim operation that allows adjustment of the output electronics to
conform to the plant standard. Three types of analog output trim are available:
4–20 mA Trim, 4–20 mA Other Scale, and Low Power. See “Analog Output
Trim” in Section 2 . Low Power is not approved for use with the Rosemount
3051N.
Cloning Off-line operation that uses the HART Communicator (Rosemount 275 or
Rosemount 375) to copy configuration data from one transmitter to one or
more other transmitters that require the same data.
Commissioning Functions performed with a HART-based communicator and the transmitter
which test the transmitter, test the loop, and verify transmitter configuration
data. See “Commissioning the Rosemount 3051N with a HART-Based
Communicator” in Section 2 .
Configuration Process of setting parameters that determine how the transmitter operates.
Damping Output function that increases the response time of the transmitter to smooth
the output when there are rapid input variations. See “Damping” in Section 2 .
Descriptor Sixteen-character field for additional identification of the transmitter, its use, or
location. The descriptor is stored in the transmitter and can be changed using
the HART-based communicator.
Digital Trim Format function that allows you to adjust the transmitter characterization for
purposes of digital calibration to plant standards. Digital Trim includes two
separate operations: Sensor Trim and Analog Output Trim. See “Transmitter
Functions” in Section 2.
Failure Mode Alarm Transmitter function that drives the analog output to a jumper-selectable high
or low value in the event of an electronics failure. See “Failure Mode Alarm” in
Section 2 .
Factory Characterization Factory process during which each sensor module is subjected to pressures
and temperatures covering the full operating range. The sensor module
memory stores data generated from this process for use by the
microprocessor in correcting the transmitter output during operation.
Full 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. See “Full Trim” in Section 2 .
HART (Highway
Addressable Remote
Transducer) Protocol
Communications standard that provides simultaneous analog and digital
signal transmission between control rooms and field devices such as
transmitters. All Rosemount SMART FAMILY products communicate using
the HART protocol.
Lower Range Limit (LRL) Lowest value of the measured variable that the transmitter can be configured
to measure.