Siemens SITRANS P Betriebsanleitung Seite 181

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Gauge pressure measuring accuracy, with flush mounted diaphragm
HART PROFIBUS PA or Foundation Fieldbus
r ≤ 10 ≤ (0.0029 • r + 0.071) %
10 < r ≤ 30 ≤ (0.0045 • r + 0.071) %
30 < r ≤ 100 ≤ (0.005 • r + 0.05) %
Settling time T
63
without electrical
damping
Approx. 0.2 s
Long-term drift at ±30° C (±54° F) In 5 years
≤ (0.25 • r) %
In 5 years
≤ 0.25%
Ambient temperature influence In percent
At -10 … +60 °C (14 … 140 °F) ≤ (0.1 • r + 0.2) % ≤ 0,3 %
at -40 … -10°C and
+60 … +85°C
(-40 … 14°F and 140 … 185°F)
≤ (0.1 • r + 0.15) % per 10 K ≤ 0.25 % per 10 K
Process temperature influence In pressure per temperature change
Temperature difference between
process
temperature and ambient
temperature
3 mbar per 10 K (0.04 psi per 10 K)
Influence of mounting position In pressure per change in angle
0.4 mbar (0.006 psi) per 10° inclination
Correction via zero offset
Power supply influence In percent per change in voltage
0.005 % per 1 V
Measured value resolution 3 • 10
-5
of the rated measuring range
Measuring accuracy (as per EN 60770-1) DS III with PMC connection
HART PROFIBUS PA or Foundation Fieldbus
Reference conditions Rising characteristic curve
Start of scale value 0 bar
Seal diaphragm: stainless steel
Measuring cell with silicon oil filling
Room temperature 25°C (77°F)
Measuring span ratio r
r = maximum measuring span or set
measuring span
Measurement deviation with limit
setting, including hysteresis and
repeatability.
Linear characteristic curve ≤ 0,075 %
r ≤ 10 ≤ (0.0029 • r + 0.071) %
10 < r ≤ 30 ≤ (0.0045 • r + 0.071) %
30 < r ≤ 100 *) ≤ (0.005 • r + 0.05) %
Repeatability Included in the measurement deviation
Hysteresis Included in the measurement deviation
Settling time T
63
without electrical
damping
Approx. 0.2 s
Technical data
11.4 Measuring accuracy
SITRANS P, DS III series with HART
Operating Instructions, 09/2012, A5E00047092-08 179
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