Recall Factory Trim-Sensor Trim; Line Pressure Effect (Range 2 And Range 3); Compensating For Line Pressure (Range 4 And Range 5) - Emerson Rosemount 2051 Wireless Series Reference Manual

Section 5: Operation and Maintenance
June 2012
Note
Select pressure input values so that lower and upper values are equal to or outside the Lower
and Upper Operating points. Do not attempt to obtain reverse output by reversing the high and
low points. The transmitter allows approximately five percent deviation.
5.2.4 Recall Factory Trim—Sensor Trim
Fast Keys
The Recall Factory Trim—Sensor Trim command allows the restoration of the as-shipped factory
settings of the sensor trim. This command can be useful for recovering from an inadvertent zero
trim of an absolute pressure unit or inaccurate pressure source.
To restore sensor trim to as-shipped factory settings:
1.
2.
3.
4.
5.2.5

Line Pressure Effect (Range 2 and Range 3)

The following specifications show the static pressure effect for the Rosemount 3051 Range 2
and Range 3 pressure transmitters used in differential pressure applications where line pressure
exceeds 2000 psi (138 bar).
Zero Effect
± 0.1% of the upper range limit plus an additional ± 0.1% of upper range limit error for each 1000
psi (69 bar) of line pressure above 2000 psi (138 bar).
Example: Line pressure is 3000 psi (207 bar) for Ultra performance transmitter. Zero effect error
calculation:
± {0.05 + 0.1 x [3 kpsi - 2 kpsi]} = ± 0.15% of the upper range limit
Span Effect
Refer to "Line Pressure Effect" on
5.2.6

Compensating for Line Pressure (Range 4 and Range 5)

The Rosemount 3051 Wireless Range 4 and 5 pressure transmitters require a special calibration
procedure when used in differential pressure applications. The purpose of this procedure is to
optimize transmitter performance by reducing the effect of static line pressure in these
applications. The 3051 Wireless differential pressure transmitters (Ranges 1, 2, and 3) do not
require this procedure because optimization occurs in the sensor.
54
3, 4, 1, 6
From the Home screen, Select 3: Service Tools.
Select 4: Routine Maintenance.
Select 1: Sensor Calibration.
Select 6: Recall Factory Trim.
page 82.
Reference Manual
00809-0100-4100, Rev AA
Operation and Maintenance