Siemens SITRANS P DS III Operating Instructions Manual page 205

Gauge pressure measuring accuracy, with flush mounted diaphragm
Effect of auxiliary power supply
Measured value resolution for
PROFIBUS PA or FOUNDATION
Fieldbus
Absolute pressure measuring accuracy with flush diaphragm
Reference conditions
Measuring span ratio r (spread, Turn-
Down)
Conformity error at limit point setting,
including hysteresis and repeatability
Linear characteristic curve
•
r ≤ 10
10 < r ≤ 30
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
Effect of auxiliary power supply
Measured-value resolution for
PROFIBUS PA or
FOUNDATION Fieldbus
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08
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
≤ 0.2%
≤ 0.4%
≤ (0.16 • r + 0.24)
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
0.04 kPa/0.4 mbar/0.006 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
13.5 Measuring accuracy of SITRANS P DS III
Technical data
205