Emerson Rosemount 2151N Reference Manual page 45

Reference Manual
00809-0000-4851 Rev AD
December 2023
Figure 3-10b – Example 1 for High Static Line
Pressure Span Correction using Method 2
(SI Units)
Calibration
Range 4 for a calibration of 0 to 0,31 MPa corrected for
10,34 MPa static line pressure
1. In this example LRV is 0 MPa. Zero differential
pressure points require no span correction.
2. Calculate the corrected URV pressure input
= 0,31 MPa – ((0,01 X 0,31 MPa) X (10,34 MPa/6,90
MPa))
= 0,305 MPa
3. At atmospheric static line pressure, with zero
differential pressure applied, adjust the zero until the
transmitter output reads 4 mA.
4. Remaining at atmospheric static line pressure, apply
0,305 MPa to the high side process connection and
adjust the span until the transmitter output reads 20
mA.
5. Check to assure desired outputs are achieved and
repeat steps 3 and 4 if necessary.
When the transmitter is exposed to 10,34 MPa static line
pressure, within specified uncertainties, the output will be 4
mA at 0 MPa and 20 mA at 0,305 MPa.
Rosemount 2151N
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