Siemens SITRANS P DS III - Page 206

Technical data
13.5 Operating conditions
SITRANS P DS III with PROFIBUS PA
206 Operating Instructions, 06/2013, A5E00053276-07
Level measuring accuracy
HART
PROFIBUS PA and FOUNDATION
Fieldbus
Long-term drift at ±30 °C (±54 °F) ≤ (0.25 • r) % per five years
static pressure max. 70 bar g
(1015 psi g)
≤ 0.25 % per five years
static pressure max. 70 bar g
(1015 psi g)
Effect of ambient temperature
As percentage
• At -10 … +60°C (14 … 140°F)
(0.4 instead of 0.2 at 10 < r ≤ 30)
Measuring cell
250 mbar (3.63 psi)
≤ (0.5 • r + 0.2) % ≤ 0.7%
Measuring cell
600 mbar (8.7 psi)
≤ (0.3 • r + 0.2) % ≤ 0.5%
Measuring cell 1.6 and 5 bar
(23.2 and 72.5 psi)
≤ (0.25 • r + 0.2) % ≤ 0.45%
• At -40 … -10°C and
+60 … +85°C
(-40 … 14°F and 140 … 185°F)
(double values for 10 < r ≤ 30)
Measuring cell
250 mbar (3.63 psi)
≤ (0.25 • r + 0.15) %/10 K
(≤ (0.25 • r + 0.15) %/18°F)
≤ 0.4 %/10 K (≤ 0.4 %/18°F)
Measuring cell
600 mbar (8.7 psi)
≤ (0.15 • r + 0.15) %/10 K
(≤ (0.15 • r + 0.15) %/18 °F)
≤ 0.3 %/10 K (≤ 0.3 %/18°F)
Measuring cell 1.6 and 5 bar
(23.2 and 72.5 psi)
≤ (0.12 • r + 0.15) %/10 K
(≤ (0.12 • r + 0.15) %/18°F)
≤ 0.27 %/10 K (≤ 0.27 %/18°F)
Effect of static pressure
• At the start of scale value
Measuring cell 250 mbar
(0.29 psi)
≤ (0.3 • r) % per nominal pressure ≤ 0.3 % per nominal pressure
Measuring cell
600 mbar (8.7 psi)
≤ (0.15 • r) % per nominal pressure ≤ 0.15 % per nominal pressure
Measuring cell 1.6 and 5 bar
(23.2 and 72.5 psi)
≤ (0.1 • r) % per nominal pressure ≤ 0.1 % per nominal pressure
• On the measuring span
≤ (0.1 • r) % per nominal pressure ≤ 0.1 % per nominal pressure
Effect of mounting position
depending on the fill fluid in the mounting flange
Effect of auxiliary power supply In percent per change in voltage
0.005 % per 1 V
Measured-value resolution
–
3 • 10
-5
of the rated measuring range