Siemens SITRANS P DS III Operating Instructions Manual page 210

Technical data
13.5 Measuring accuracy of SITRANS P DS III
Differential pressure and flow rate measuring accuracy
Effect of mounting position
Effect of auxiliary power supply
Measured-value resolution for
PROFIBUS PA or
FOUNDATION Fieldbus
Level measuring accuracy
Reference conditions
Measuring span ratio r (spread, Turn-
Down)
Conformity error at limit point setting, in-
cluding hysteresis and repeatability
Linear characteristic curve
•
250 mbar/25 kPa/3.63 psi
600 mbar/60 kPa/8.70 psi
1600 mbar/160 kPa/23.21 psi
5 bar/500 kPa/72.52 psi
Effect of ambient temperature
250 mbar/25 kPa/3.63 psi
•
600 mbar/60 kPa/8.70 psi
•
1600 mbar/160 kPa/23.21 psi
•
5 bar/500 kPa/72.52 psi
Effect of static pressure
At the start of scale value
•
Measuring cell 250
mbar/25 kPa/3.63 psi
Measuring cell
600 mbar/60 kPa/8.70 psi
210
In pressure per change of angle
≤ 0.7 mbar/0.07 kPa/0.028 inH
(zero-point correction is possible with position error compensation)
In percent per change in voltage
0.005 % per 1 V
3 • 10 of the nominal measuring range
-5
Rising characteristic curve
•
Start of scale value 0 bar/kPa/psi
•
Seal diaphragm stainless steel
•
Measuring cell with silicone oil filling
•
Room temperature 25 °C (77 °F)
•
r = max. measuring span/set measuring span and nominal measuring range
r ≤ 5
≤ 0.125%
≤ 0.125%
≤ 0.125%
≤ 0.125%
In percent per 28 °C (50 °F)
≤ (0.4 • r + 0.16) %
≤ (0.24 • r + 0.16) %
≤ (0.2 • r + 0.16) %
≤ (0.3 • r) % per nominal pressure
≤ (0.15 • r) % per nominal pressure
O per 10° incline
2
5 < r ≤ 10 5 < r ≤ 25
≤ (0.007 • r + 0.09)
%
≤ (0.007 • r +
0.09) %
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08
5 < r ≤ 30
≤ (0.007 • r +
0.09) %
≤ (0.007 • r +
0.09) %