Reference Manual
00809-0100-4690, Rev FC
June 2011
C-1
Rosemount 2088 and 2090
Appendix C Glossary
Some of the terms used in this manual relate specifically to the operation of
Rosemount transmitters, hand-held Field Communicators, and other
Rosemount products. The following list provides brief definitions. See the
sections listed for additional information.
Analog Output Trim Digital trim operation that allows adjustment of the output electronics to
conform to the plant standard of current. Two types of analog output trim are
available: 4–20 mA output trim and 4–20 mA other scale.
Cloning Off-line operation that uses a Field Communicator to copy configuration data
from one transmitter to one or more other transmitters that require the same
data.
Commissioning Functions performed with the Field Communicator and the transmitter that
test the transmitter and test the loop, and verify transmitter configuration data.
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.
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 Field 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.
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.
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.
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.
Lower Range Limit (LRL) Lowest value of the measured variable that the transmitter can be configured
to measure.
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