Siemens SITRANS P DS III Operating Instructions Manual page 203

Absolute pressure measuring accuracy (from gauge and differential pressure series)
Reference conditions
Measurement deviation with limit
setting, including hysteresis and
repeatability
Linear characteristic curve
r ≤ 10
•
10 < r ≤ 30
•
Settling time T without electrical
63
damping
Long-term drift at ±30 °C (±54 °F)
Effect of ambient temperature
At -10 ... +60 °C (14 ... 140 °F)
•
at -40 ... -10°C and
•
+60 ... +85°C
(-40 ... 14°F and 140 ... 185°F)
Effect of mounting position
Effect of auxiliary power supply
Measured-value resolution
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
HART
Rising characteristic curve
•
Start of scale 0 bar
•
Seal diaphragm stainless steel
•
Measuring cell with silicone oil filling
•
Room temperature 25 °C (77 °F)
•
Measuring span ratio r
•
r = max. measuring span/set
measuring span
≤ 0.1%
≤ 0.2%
Approx. 0.2 s
per year ≤ (0.1 • r) %
in percent
≤ (0.1 • r + 0.2) %
≤ (0.1 • r + 0.15) % per 10 K
In pressure per change of angle
for absolute pressure (from the gauge pressure series): 0.05 mbar
•
(0.000725 psi) per 10° inclination
for absolute pressure (from the differential pressure series): 0.7 mbar
•
(0.001015 psi) per 10° inclination
Correction via zero offset
In percent per change in voltage
0.005 % per 1 V
–
13.4 Measuring accuracy
PROFIBUS PA and FOUNDATION
Fieldbus
–
≤ 0.1%
–
–
per year ≤ 0.1 %
≤ 0.3%
≤ 0.25 % per 10 K
–
3 • 10 of the rated measuring range
-5
Technical data
203