Rosemount 3152, Справочное руководство

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Reference Manual
00809-0100-4835 Rev BD
July 2016
Rosemount 3150 Series
3-16
Figure 3-10a – Example 2 for High
Static Line Pressure, Span Correction
using Method 2 (English Units) Range 5 for a calibration of –250 to 750 psi corrected for 1,500 psi static
line pressure
1. Calculate the corrected LRV pressure input
= -250 psi – ((0.0125 X -250 psi) X (1500 psi/1000 psi))
= -245.31 psi
2. Calculate the corrected URV pressure input
= 750 psi – ((0.0125 X 750 psi) X (1500 psi/1000 psi))
= 735.94 psi
3. At atmospheric static line pressure, apply 245.31 psi to the low side
process connection (-245.31 psi) and adjust the zero until the
transmitter output reads 4 mA.
4. Remaining at atmospheric static line pressure, apply 735.94 psi 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 1,500 psi static line pressure, within
specified uncertainties, the output will be 4 mA at -250 psi and 20 mA at 750
psi.
Figure 3-10b – Example 2 for High
Static Line Pressure, Span Correction
using Method 2 (SI Units)
Range 5 for a calibration of –1,72 to 5,17 MPa corrected for 10,34 MPa
static line pressure
1. Calculate the corrected LRV pressure input
= -1,72 MPa – ((0,0125 X -1,72 MPa) X (10,34 MPa/6,90 MPa))
= -1,69 MPa
2. Calculate the corrected URV pressure input
= 5,17 MPa – ((0,0125 X 5,17 MPa) X (10,34 MPa/6,90 MPa))
= 5,07 MPa
3. At atmospheric static line pressure, apply 1,69 MPa to the low side
process connection (-1,69 MPa) and adjust the zero until the
transmitter output reads 4 mA.
4. Remaining at atmospheric static line pressure, apply 5,07 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 -1,72 MPa and 20 mA at
5,17 MPa.