![Emerson Rosemount 3152 Скачать руководство пользователя страница 45](http://html.mh-extra.com/html/emerson/rosemount-3152/rosemount-3152_reference-manual_104708045.webp)
Reference Manual
00809-0100-4835 Rev BE
February 2018
Rosemount 3150 Series
(1) For Rosemount 3150 Series pressure transmitters with Standard Option Code “P4”, correction for High Static Line Pressure
(HSLP) at customer specified line pressure (with no residual HSLP uncertainty) may have been performed at the factory.
Please contact Rosemount Nuclear for details.
Calibration
36
Correction for High Static
Line Pressure
(1)
High Static Line Pressure Span
Effect on Range Codes 1, 2, and 3
DP Transmitters
Rosemount 3150 Series Range 1, 2, and 3 differential
pressure transmitters do not require correction for high static
pressure span effect. The correction for these ranges occurs
within the sensor; however, an associated residual uncertainty
remains. This uncertainty is stated as the high static line
pressure span effect found in the applicable Product Data
Sheet.
High Static Line Pressure Span
Correction for Range Code 4 and 5
DP Transmitters
Rosemount 3150 Series Range 4 and 5 pressure transmitters
experience a systematic span shift when operated at high
static line pressure. It is linear and correctable during
calibration.
The correction factor for span shift caused by the application
of static line pressure is shown in
Table 3-1 – Range 4 and 5 Correction
Factors
Range 4 and 5 Span Correction Factor
% Input Reading per 1000 psi (6,90 MPa)
Range 4
1.00%
Range 5
1.25%
Correction factors have an uncertainty of ±0.20% of input reading per 1000 psi
(6,90 MPa).
The following illustrates two methods of correcting for the high
static pressure span shift. Examples follow each method.
Method 1 for High Static Line Pressure, Ranges 4 and 5
Adjust transmitter output while leaving the input pressure at
desired in service differential pressures. Use one of the
following formula sets (depending on the pressure units being
used to calibrate):
If using English Units (psi):
Corrected output reading at LRV =
4 mA + ((S X P/1000 X LRV)/Span) X 16 mA
Corrected output reading at URV =
20 mA + ((S X P/1000 X URV)/Span) X 16 mA
If using SI Units (MPa):
Corrected output reading at LRV =
4 mA + ((S X P/6,90 X LRV)/Span) X 16 mA
Corrected output reading at URV =
20 mA + ((S X P/6,90 X URV)/Span) X 16 mA
Where:
LRV = Lower Range Value
URV = Upper Range Value
P = Static Line Pressure
Span = Calibrated Span