Emerson 3051N User Manual

Reference Manual

00809-0100-4808, Rev CA
June 2008

Rosemount 3051N

www.rosemountnuclear.com

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.

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. 

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 .

Process of setting parameters that determine how the transmitter operates.

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 .

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.

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.

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 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.

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 .

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.

Lowest value of the measured variable that the transmitter can be configured 
to measure.