Siemens SITRANS P - Manual (Page 108)

SITRANS P measuring instruments for pressure
Transmitters for gage, absolute and differential pressure, flow and level
DS III series
for differential pressure and flow
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• Square-root characteristic (flow 25 ... 50%) ≤ 0,2
- r ≤ 10 ≤ 0,2% -
- 10 < r ≤ 30 ≤ 0,4% -
Long-term drift (temperature change ± 30 °C
( ± 54 °F))
≤ (0.25 ⋅ r)% every 5 years
static pressure max. 70 bar g (1015 psi g)
≤ (0.25% every 5 years
static pressure max. 70 bar g (1015 psi g)
• 20 mbar (0.29 psi)-measuring cell ≤ (0.2 ⋅ r) per year ≤ 0.2 per year
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
(Twice the value with 20-mbar (0.29 psi)
measuring cell)
≤ 0.25%/10 K
Influence of static pressure
• on the zero point ≤ (0.15 ⋅ r)% per 100 bar (1450 psi) ≤ 0.15% je 100 bar (1450 psi)
- 20 mbar (0.29 psi)-measuring cell ≤ (0.15 ⋅ r)% per 32 bar (464 psi) ≤ 0.15% je 32 bar (464 psi)
• on the span ≤ 0.2% je 100 bar (1450 psi) -
- 20 mbar (0.29 psi)-measuring cell ≤ 0.2% je 32 bar (464 psi) -
Measured Value Resolution - 3 ⋅ 10 -5 of nominal measuring range
Rated operating conditions
Degree of protection (to EN 60529) IP65
Process temperature
• Measuring cell with silicone oil filling -40 ... +100 °C (-40 ... +212 °F)
• Measuring cell with inert filling liquid -20 ... +100 °C (-4 ... +212 °F)
• In conjunction with dust explosion protec-
tion
-20 ... +60 °C (-4 ... +140 °F)
Ambient conditions
• Ambient temperature
- Digital indicators -30 ... +85 °C (-22 ... +185 °F)
• Storage temperature -50 ... +85 °C (-58 ... +185 °F)
• Climatic class
- Condensation Permissible
• Electromagnetic compatibility
- Emitted interference and interference
immunity
To EN 61326 and NAMUR NE 21
Material of the mounting bracket
• Steel Sheet steel, Mat. No. 1.0330, chrome-plated
• Stainless steel Stainless steel, Mat. No. 1.4301 (SS304)
Design
Weight (without options) ≈ 4.5 kg (≈ 9.9 lb)
Housing material Poor in copper die-cast aluminium, GD-AlSi12 or stainless steel precision casting, mat. No. 1.4408
Wetted parts materials
• Seal diaphragm Stainless steel, mat. No. 1.4404/316L or Hastelloy C276, mat. No. 2.4819, Monel, mat. No. 2.4360,
tantalum or gold
Measuring cell filling Silicone oil or inert filling liquid (max. 160 bar (2320 psi g) with oxygen measurement)
Process connection Female thread ¼-18 NPT and flange connection with mounting thread M10 to DIN 19213 or
7 /
16
-20 UNF to EN 61518
SITRANS P, DS III series, for differential pressure and flow
HART PROFIBUS PA or FOUNDATION Fieldbus
© Siemens AG 2008