Emerson Rosemount 3152 - Page 50

Rosemount 3150 Series
Reference Manual
00809-0100-4835 Rev BE
February 2018
41
Calibration
Figure 3-11 – High Static Line
Pressure Span Correction using
Method 2; Example 2
Figure 3-11a – 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.