Siemens SITRANS P - Manual (Page 52)

SITRANS P measuring instruments for pressure
Transmitters for gage pressure for the paper industry
DS III series with PMC connection
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Technical specifications
SITRANS P, DS III series for gage pressure with PMC connection for the paper industry
HART PROFIBUS PA or FOUNDATION Fieldbus
Input
Measured variable Gage pressure
Spans (infinitely adjustable) or
nominal measuring range and
max. permissible test pressure Span Max. perm. test pres-
sure Nominal measuring
range Max. perm. test pres-
sure
0.01 ... 1 bar g
(0.145 ... 14.5 psi g) 6 bar g
(87 psi g) 1 bar g
(14.5 psi g) 6 bar g
(87 psi g)
0.04 ... 4 bar g
(0.58 ... 58 psi g) 10 bar g
(145 psi g) 4 bar g
(58 psi g) 10 bar g
(145 psi g)
0.16 ... 16 bar g
(2.32 ... 232 psi g) 32 bar g
(464 psi g) 16 bar g
(232 psi g) 32 bar g
(464 psi g)
Lower measuring limit
• Measuring cell with silicone oil filling 100 mbar a (1.45 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 ≤ 0,075%
- r ≤ 10 ≤ (0.0029 ⋅ r + 0.071)%
- 10 < r ≤ 30 ≤ (0.0045 ⋅ r + 0.071)%
- 30 < r ≤ 100 ≤ (0.005 ⋅ r + 0.05)%
Long-term drift (temperature change ± 30 °C
( ± 54 °F))
≤ (0.25 ⋅ r)% every 5 years ≤ 0.25% every 5 years
Influence of ambient temperature
• at -10 ... +60 °C (14 ... 140 °F) ≤ (0.08 ⋅ r + 0.1)% ≤ 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
Influence of medium temperature
• Temperature difference between medium
temperature and ambient temperature
3 mbar/10 K (0.04 psi/10 K)
Influence of mounting position ≤ 0.1 mbar g (0.00145 psi g) per 10° inclination
Measured Value Resolution - 3 ⋅ 10 -5 of nominal measuring range
© Siemens AG 2008