Siemens SITRANS P Manual de usuario descargar pdf (Pagina 79)

SITRANS P measuring instruments for pressure

Transmitters for gage, absolute and differential pressure, flow and level

DS III series for gage and absolute pressure,

with front-flush diaphragm

2/79

Siemens FI 01 · 2009

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Technical specifications

SITRANS P, DS III series for gage and absolute pressure, with front-flush diaphragm

HART PROFIBUS PA or FOUNDATION Fieldbus

Input gage pressure, with front-flush

diaphragm

Measured variable Gage pressure, flush-mounted

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

(2.23 ... 232 psi g)

32 bar g

(464 psi g)

16 bar g

(232 psi g)

32 bar g

(464 psi g)

0.6 ... 63 bar g

(9.14 ... 914 psi g)

100 bar g

(1450 psi g)

63 bar g

(914 psi g)

100 bar g

(1450 psi g)

Lower measuring limit -100 mbar a (-1.45 psi a)

Upper measuring limit 100% of max. span 100% of nominal measuring range

Input absolute pressure, with front-flush

diaphragm

Measured variable Absolute pressure, flush-mounted

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

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)

0,16 ... 5 bar 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)

Depending on the process connection, the span

may differ from these values

Depending on the process connection, the nomi-

nal measuring range may differ from these values

Lower measuring limit 0 bar a (0 psi a)

Upper measuring limit 100% of max. span 100% of nominal measuring range

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

≤ (U

- 10.5 V)/0.023 A in Ω,

: Power supply in V

• With HART communication R

= 230 ... 500 Ω (SIMATIC PDM) or

= 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 fill-

ing, 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)

Gage pressure,

front-flushed

Absolute pressure,

front-flushed

Gage pressure,

front-flushed

Absolute pressure,

front-flushed

• Linear characteristic ≤ 0,075% ≤ 0,2%

-r ≤ 10 ≤ (0.0029 ⋅ r + 0.071)% ≤ 0,2%

- 10 < r ≤ 30 ≤ (0.0045 ⋅ r + 0.071)% ≤ 0,4%

- 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

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