Step response time T
63
(without electrical damping) - gauge pressure from differential pressure series
20 mbar/2 kPa/8.031 inH
2
O Approx. 0.160 s
60 mbar/6 kPa/24.09 inH2O Approx. 0.150 s
250 mbar/25 kPa/3.6 psi
600 mbar/60 kPa/240.9 inH
2
O
1600 mbar/160 kPa/642.4 inH
2
O
5000 mbar/500 kPa/2008 inH
2
O
30 bar/3 MPa/435 psi
Approx. 0.135 s
100 bar/10 MPa/1450.3 psi Approx. 0.145 s
Effect of mounting position - gauge pressure from differential pressure series
≤ 0.7 mbar/0.007 kPa/0.01015266 psi per 10° incline
(correct the zero point with position error compensation)
8.2.5 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) r = max. measuring span/set measuring span and nominal
measuring range
● Linear characteristic curve
r ≤ 10 10 < r ≤ 30
All measuring cells ≤ 0.1% ≤ 0.2%
Effect of ambient temperature - absolute pressure from gauge and differential pressure series
In percent per 28 °C (50 °F)
250 mbar/25 kPa/3.6 psi ≤ (0.15 • r + 0.1)
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
≤ (0.08 • r + 0.16)
Long-term stability at ±30 °C (±54 °F) - absolute pressure from gauge and differential pressure series
In 5 years ≤ (0.25 • r)%
Technical data
8.2 Measuring accuracy of SITRANS P320
SITRANS P320/P420 with 4 to 20 mA/HART
72 Compact Operating Instructions, 09/2018, A5E38874562-AB
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