Siemens SITRANS P500, Operating Instructions Manual, Page: 202 / 238

Technical data
11.4 Measuring accuracy
SITRANS P500 with HART
202
Operating Instructions, 12/2014, A5E02344528-09
Differential pressure and flow rate measuring accuracy
• 5 kPa/50 mbar/20 inH
2
O
≤ 0,06 % ≤ (0.006 • r) %
•
25 kPa/250 mbar/100 inH
2
O
1.25 bar/1250 mbar/502 inH
2
O
625 kPa/6250 mbar/2509 inH
2
O
3200 kPa/32 bar/465 psi
≤ 0,03 % ≤ (0.003 • r) %
Flow 25 ... 50 % r ≤ 10 r ≥ 10
• 5 kPa/50 mbar/20 inH
2
O
≤ 0,12 % ≤ (0.012 • r) %
•
25 kPa/250 mbar/100 inH
2
O
1.25 bar/1250 mbar/502 inH
2
O
625 kPa/6250 mbar/2509 inH
2
O
3200 kPa/32 bar/465 psi
≤ 0,06 % ≤ (0.006 • r) %
Ambient temperature influence In percent per 28 °C (50 °F)
•
5 kPa/50 mbar/20 inH
2
O
≤ (0.04 • r + 0.05) %
• 25 kPa/250 mbar (100 inH
2
O)
≤ (0.025 • r + 0.014) %
•
1.25 bar/1250 mbar/502 inH
2
O
625 kPa/6250 mbar/2509 inH
2
O
3200 kPa/32 bar/465 psi
≤ (0.006 • r + 0.03) %
Effect of static pressure
•
At the start-of-scale value
5 kPa/50 mbar/20 inH
2
O ≤ (0.1 • r) % per 7 MPa/70 bar/1015 psi correction
via zero point correction
25 kPa/250 mbar (100 inH
2
O) ≤ (0.035 • r) % per 7 MPa/70 bar/1015 psi correc-
tion via zero point correction
1.25 bar/1250 mbar/502 inH
2
O
625 kPa/6250 mbar/2509 inH
2
O
3200 kPa/32 bar/465 psi
≤ (0.007 • r) % per 7 MPa/70 bar/1015 psi correc-
tion via zero point correction
•
On the span
5 kPa/50 mbar/20 inH
2
O ≤ 0.13 % per 7 MPa/70 bar/1015 psi
25 kPa/250 mbar/100 inH
2
O
1.25 kPa/1250 mbar/502 inH
2
O
≤ 0.03 % per 7 MPa/70 bar/1015 psi
625 kPa/6250 mbar/2509 inH
2
O ≤ 0.09 % per 7 MPa/70 bar/1015 psi
3200 kPa/32 bar/465 psi ≤ 0.05% per 7 MPa/70 bar/1015 psi
Long-term stability In 5 years ≤ 0.05 • r %
In 10 years ≤ 0.08 • r %
Step response time T
63
(without electrical damping)
5 kPa/50 mbar/20 inH
2
O ≤ 140 ms, contains a dead time of ≤ 45 ms
25 kPa/250 mbar/100 inH
2
O
1.25 kPa/1250 mbar/502 inH
2
O
625 kPa/6250 mbar/2509 inH
2
O
3200 kPa/32 bar/465 psi
≤ 88 ms, contains a dead time of ≤ 45 ms