Siemens SITRANS P - Manual (Page 89)

SITRANS P measuring instruments for pressure
Transmitters for gage, absolute and differential pressure, flow and level
DS III series for absolute pressure
(from gage pressure series)
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Technical specifications
SITRANS P, DS III series for absolute pressure (from the gage pressure series)
HART PROFIBUS PA or FOUNDATION Fieldbus
Input
Measured variable Absolute pressure
Spans (infinitely adjustable) or
nominal measuring range and
max. permissible test pressure Span Max. perm. test
pressure Nominal measuring
range Max. perm. test
pressure
8.3 ... 250 mbar a
(0.12 ... 3.6 psi a) 6 bar a
(87 psi a) 250 mbar a
(3.6 psi a) 6 bar a
(87 psi a)
43 ... 1300 mbar a
(0.62 ... 18.9 psi a) 10 bar a
(145 psi a) 1300 mbar a
(18.9 psi a) 10 bar a
(145 psi a)
160 ... 5000 mbar a
(2.32 ... 72.5 psi a) 30 bar a
(435 psi a) 5 bar a
(72.5 psi a) 30 bar a
(435 psi a)
1 ... 30 bar a
(14.5 ... 435 psi a) 100 bar a
(1450 psi a) 30 bar a
(435 psi a) 100 bar a
(1450 psi a)
Lower measuring limit
• Measuring cell with silicone oil filling 0 mbar a (0 psi a)
Upper measuring limit 100% of max. span
Output
Output signal 4 ... 20 mA Digital PROFIBUS PA or FOUNDATION Fieldbus
signal
• Lower limit (infinitely adjustable) 3.55 mA, factory preset to 3.84 mA -
• Upper limit (infinitely adjustable) 23 mA, factory preset to 20.5 mA or optionally set
to 22.0 mA -
Load
• Without HART communication R
B
≤ (U
H
- 10.5 V)/0.023 A in Ω,
U
H
: Power supply in V
-
• With HART communication R
B
= 230 ... 500 Ω (SIMATIC PDM) or
R
B
= 230 ... 1100 Ω (HART Communicator)
-
Physical bus - IEC 61158-2
With polarity reversal protection - Yes
Accuracy To EN 60770-1
Reference conditions
(All error data refer always refer to the set
span) Increasing characteristic, start-of-scale value 0 bar, stainless steel seal diaphragm, silicone oil filling,
room temperature 25 °C (77 °F)) r: Span ratio (r = max. span / set span)
Error in measurement and fixed-point setting
(including hysteresis and repeatability)
• Linear characteristic ≤ 0.1%
- r ≤ 10 ≤ 0.1%
- 10 < r ≤ 30 ≤ 0.2%
Long-term drift (temperature change ±30 °C
( ±54 °F))
≤ (0.1 ⋅ r)%/year ≤ 0.1%/year
Influence of ambient temperature
• 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)%/10 K ≤ 0.25%/10 K
Measured Value Resolution - 3 ⋅ 10 -5
of nominal measuring range
© Siemens AG 2008