Emerson 3051N User Manual

Reference Manual 

00809-0100-4808, Rev CA
June 2008

2-15

Rosemount 3051N

Calibration Overview

Complete calibration of the Rosemount 3051N Pressure Transmitter involves 
the following tasks:

•

Set Process Variable Units (page 2-8)

•

Set Output Type – Linear or Square Root (page 2-8)

•

Set the Range Points (page 2-9)

•

•

Full Trim (page 2-18)

•

Zero Trim (page 2-17)

•

4–20 mA Output Trim (page 2-19) or

•

4–20 mA Output Trim Using Other Scale (page 2-19)

Figure 2-7 illustrates the Rosemount 3051N transmitter data flow. This data 
flow can be summarized in four major steps:

1.

A change in pressure is measured by a change in the sensor output 
(Sensor Signal).

2.

The sensor signal is converted to a digital format that can be 
understood by the microprocessor (Analog-to-Digital Signal 
Conversion). 

3.

Corrections are performed in the microprocessor to obtain a digital 
representation of the process input (Digital PV). 

4.

The Digital PV is converted to an analog value (Digital-to-Analog 
Signal Conversion).

Figure 2-7 also identifies the approximate transmitter location for each 
calibration task. Note that the data flows from left to right, and a parameter 
change affects all values to the right of the changed parameter.

Not all calibration procedures should be performed for each Rosemount 
3051N transmitter. In addition, some procedures are appropriate for bench 
calibration but should not be performed during field calibration. Table 2-2 
identifies the recommended calibration procedures for each type of 
Rosemount 3051N transmitter for both bench and field calibration.