Siemens SITRANS P DS III Operating Instructions Manual page 186

Technical data
11.4 Measuring accuracy
Measuring accuracy (as per EN 60770-1) DS III with PMC connection
Reference conditions
Measurement deviation with limit
setting, including hysteresis and
repeatability
Linear characteristic curve
r ≤ 10
•
10 < r ≤ 30
•
30 < r ≤ 100 *)
•
Repeatability
Hysteresis
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 process temperature
Temperature difference between
•
process temperature and ambient
temperature
Effect of mounting position
Effect of auxiliary power supply
Measured value resolution
*) not for 4 bar PMC Minibolt
186
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
≤ (0.0029 • r + 0.071) %
≤ (0.0045 • r + 0.071) %
≤ (0.005 • r + 0.05) %
Included in the measurement deviation
Included in the measurement deviation
Approx. 0.2 s
In 5 years
≤ (0.25 • r) %
In percent
≤ (0.08 • r + 0.1) %
≤ (0.1 • r + 0.15) % per 10 K
In pressure per temperature change
3 mbar per 10 K (0.04 psi per 10 K)
In pressure per change in angle
≤ 0.1 mbar g (0.00145 psi g) per 10° inclination
correction via zero offset
In percent per change in voltage
0.005 % per 1 V
–
PROFIBUS PA and FOUNDATION
Fieldbus
–
≤ 0.075%
–
–
–
In 5 years
≤ 0.25%
≤ 0.3%
≤ 0.25% per 10 K
–
3 • 10 of the rated measuring range
-5
SITRANS P DS III with HART
Operating Instructions, 06/2013, A5E00047092-09