Siemens SITRANS P - Manual (Page 107)

SITRANS P measuring instruments for pressure
Transmitters for gage, absolute and differential pressure, flow and level
DS III series
for differential pressure and flow
2/107 Siemens FI 01 · 2009
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Technical specifications
SITRANS P, DS III series, for differential pressure and flow
HART PROFIBUS PA or FOUNDATION Fieldbus
Input
Measured variable Differential pressure and flow
Spans (infinitely adjustable) or
nominal measuring range and
max. permissible working pressure Span Maximum working pres-
sure Nominal measuring
range Maximum working pres-
sure
1 ... 20 mbar
(0.4015 ... 8.031 inH
2
O)
32 bar
(464 psi) 20 mbar g
(8.031 inH
2
O)
32 bar
(464 psi)
1 ... 60 mbar
(0.4015 ... 24.09 inH
2
O)
160 bar
(2320 psi) 60 mbar
(24.09 inH
2
O)
160 bar
(2320 psi)
2.5 ... 250 mbar
(1.004 ... 100.4 inH
2
O)
250 mbar
(100.4 inH
2
O)
6 ... 600 mbar
(2.409 ... 240.9 inH
2
O)
600 mbar
(240.9 inH
2
O)
16 ... 1600 mbar
(6.424 ... 642.4 inH
2
O)
1600 mbar
(642.4 inH
2
O)
50 ... 5000 mbar
(20.08 ... 2008 inH
2
O)
5 bar
(2008 inH
2
O)
0.3 ... 30 bar
(4.35 ... 435 psi) 30 bar
(435 psi)
2.5 ... 250 mbar
(1.004 ... 100.4 inH
2
O)
420 bar
(6091 psi) 250 mbar
(100.4 inH
2
O)
420 bar
(6091 psi)
6 ... 600 mbar
(2.409 ... 240.9 inH
2
O)
600 mbar
(240.9 inH
2
O)
16 ... 1600 mbar
(6.424 ... 642.4 inH
2
O)
1600 mbar
(642.4 inH
2
O)
50 ... 5000 mbar
(20.08 ... 2008 inH
2
O)
5 bar
(2008 inH
2
O)
0.3 ... 30 bar
(4.35 ... 435 psi) 30 bar
(435 psi)
Lower measuring limit
• Measuring cell with silicone oil filling -100% of max. span (-33% with 30 bar (435 psi) measuring cell or 30 mbar a (0.44 psi))
Upper measuring limit 100% of max. span (for oxygen version and inert filling liquid; max. 160 bar g (2320 psi g))
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 ≤ 0,075%
- r ≤ 10 ≤ (0.0029 ⋅ r + 0.071)%
- 10 < r ≤ 30 ≤ (0.0045 ⋅ r + 0.071)%
- 30 < r ≤ 100 ≤ (0.005 ⋅ r + 0.05)%
• Square-root characteristic (flow > 50%) ≤ 0,1%
- r ≤ 10 ≤ 0,1%
- 10 < r ≤ 30 ≤ 0,2%
© Siemens AG 2008