Compensating For Line Pressure; Range 2 And 3; Range 4 And 5 - Emerson Rosemount 2051 Reference Manual

Calibration
November 2016
5.8

Compensating for line pressure

5.8.1

Range 2 and 3

The following specifications show the static pressure effect for the Rosemount 2051
Range 2 and 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). Zero effect error calculation:
±(0.01 + 0.1
Span effect
Refer to
5.8.2

Range 4 and 5

Rosemount 2051 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 Rosemount 2051 Differential Pressure Transmitters (Ranges 1, 2, and 3)
do not require this procedure because optimization occurs in the sensor.
Applying high static pressure to Rosemount 2051 Range 4 and 5 Pressure Transmitters
causes a systematic shift in the output. This shift is linear with static pressure; correct it by
performing the
The following specifications show the static pressure effect for Rosemount 2051 Range 4
and 5 Transmitters used in differential pressure applications:
Zero effect
±0.1% of the upper range limit per 1000 psi (69 bar) for line pressures from 0 to 2000 psi
(0 to 138 bar)
For line pressures above 2000 psi (138 bar), the zero effect error is ±0.2% of the upper range
limit plus an additional ±0.2% 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 (3 kpsi). Zero effect error calculation:
±(0.2 + 0.2
Span effect
Correctable to ±0.2% of reading per 1000 psi (69 bar) for line pressures from 0 to 3626 psi
(0 to 250 bar)
50
[3 kpsi –2 kpsi]) = ±0.2% of the upper range limit
"Line pressure effect per 1000 psi (6,9 MPa)" on page
"Sensor trim" on page
[3 kpsi – 2 kpsi]) = ±0.4% of the upper range limit
63.
46.
Reference Manual
00809-0300-4101, Rev BB
Calibration