Siemens SITRANS P DS III Operating Instructions Manual page 206

Technical data
13.5 Measuring accuracy of SITRANS P DS III
Measuring accuracy (according to EN 60770-1) of pressure transmitter with PMC connection
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 elec-
63
trical damping
Effect of mounting position
Effect of auxiliary power supply
Measured-value resolution for
PROFIBUS PA or
FOUNDATION Fieldbus
Absolute pressure measuring accuracy (from gauge and differential pressure series)
Reference conditions
Measuring span ratio r (spread, Turn-
Down)
Conformity error at limit point setting,
including hysteresis and repeatability
206
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
≤ 0.1 mbar/0.01 kPa/0.00145 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
SITRANS P DS III/P410 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00053276-08