Effect of mounting position
≤ 0.7 mbar/0.07 kPa/0.01015266 psi per 10° incline
(zero-point correction is possible with position error compen‐
sation)
13.3.5
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 a/25 kPa a/3.6 psi a
≤ (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)%
Step response time T
63
(without electrical damping) - absolute pressure from gauge and differential pressure series
Gauge pressure series
All measuring cells
Approx. 0.105 s
Differential pressure series
250 mbar/25 kPa/3.6 psi
Approx. 0.195 s
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
Approx. 0.145 s
Technical data
13.3 Measuring accuracy of SITRANS P420
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
221