Siemens SITRANS P DS III Operating Instructions Manual page 204

Technical data
13.5 Measuring accuracy of SITRANS P DS III
Measuring accuracy (as per EN 60770-1) gauge pressure
16 bar/1.6 MPa/232 psi
•
63 bar/6.3 MPa/914 psi
160 bar/16 MPa/2321 psi
400 bar/40 MPa/5802 psi
700 bar/70 MPa/10152 psi
•
Step response time T (without
63
electrical damping)
Effect of mounting position
Effect of auxiliary power supply
Measured value resolution for
PROFIBUS PA or FOUNDATION
Fieldbus
Gauge pressure measuring accuracy, with flush mounted diaphragm
Reference conditions
Measuring span ratio r (spread, Turn-
Down)
Conformity error at limit point setting,
including hysteresis and repeatability
Linear characteristic curve
•
r ≤ 5
5 < r ≤ 100
Effect of ambient temperature
In percent per 28 °C (50 °F)
Effect of process temperature
Temperature difference between
•
medium temperature and ambient
temperature
Long-term stability at ±30 °C (±54 °F)
Step response time T without electri-
63
cal damping
Effect of mounting position
204
In 5 years ≤ (0.125 • r) %
In 5 years ≤ (0.25 • r) %
Approx. 0.15 s
≤ 0.05 mbar/0.005 kPa/0.000725 psi per 10° incline
(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
≤ 0.075 %
≤ (0.005 • r + 0.05) %
≤ (0.08 • r + 0.16)
In pressure per temperature change
3 mbar per 10 K
0.3 kPa per 10 K
0.04 psi per 10 K
In 5 years ≤ (0.25 • r) %
Approx. 0.2 s
In pressure per change of angle
0.4 mbar/0.04 kPa/0.006 psi per 10° incline
(zero-point correction is possible with position error compensation)
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08