Absolute Pressure From Gauge And Differential Pressure Series - Siemens SITRANS P Operating Instructions Manual

Step response time T (without electrical damping) - gauge pressure from differential pressure series
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20 mbar/2 kPa/8.031 inH
60 mbar/6 kPa/24.09 inH2O
250 mbar/25 kPa/3.6 psi
600 mbar/60 kPa/240.9 inH
1600 mbar/160 kPa/642.4 inH
5000 mbar/500 kPa/2008 inH
30 bar/3 MPa/435 psi
100 bar/10 MPa/1450.3 psi
Effect of mounting position - gauge pressure from differential pressure series
≤ 0.7 mbar/0.07 kPa/0.01015266 psi per 10° incline
(correct the zero point with position error compensation)
13.2.5

Absolute pressure from gauge and differential pressure series

Conformity error at limit point setting, including hysteresis and repeatability - absolute pressure from gauge and differential
pressure series
Measuring span ratio r (spread, Turn-Down)
● Linear characteristic curve
All measuring cells
Effect of ambient temperature - absolute pressure from gauge and differential pressure series
In percent per 28 °C (50 °F)
250 mbar a/25 kPa a/3.6 psi a
1300 mbar a/130 kPa a/18.8 psi a
5 bar a/500 kPa a/72.5 psi a
30 bar a/3000 kPa a/435 psi a
100 bar a/10 MPa a/1450.3 psi a
160 bar a/16 MPa a/2321 psi a
400 bar a/40 MPa a/5802 psi a
700 bar a/70 MPa a/10152.6 psi a
Long-term stability at ±30 °C (±54 °F) - absolute pressure from gauge and differential pressure series
In 5 years ≤ (0.25 • r)%
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
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13.2 Measuring accuracy of SITRANS P320
Approx. 0.160 s
Approx. 0.150 s
Approx. 0.135 s
Approx. 0.145 s
r = max. measuring span/set measuring span and nominal
measuring range
r ≤ 10
≤ 0.1%
≤ (0.15 • r + 0.1)
≤ (0.08 • r + 0.16)
Technical data
10 < r ≤ 30
≤ 0.2%
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