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Sitrans p measuring instruments for pressure – Siemens SITRANS P User Manual

Page 35

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SITRANS P measuring instruments for pressure

Transmitters for food, pharmaceuticals and biotechnology

SITRANS P300 for gage and absolute pressure

2/35

Siemens FI 01 · 2009

2

Input of absolute pressure, with front-flush diaphragm

Measured variable

Absolute pressure (front-flush)

Spans (infinitely adjustable) or
nominal measuring range and
max. pemissible 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

• Measuring cell with silicone oil

100% der max. Messspanne

100% des max. Nennmessbereichs

Output

Output signal

4 ... 20 mA

Digital PROFIBUS PA signal

Physical bus

-

IEC 61158-2

With polarity reversal protection

No

Yes

Electrical damping T

63

(step width 0.1 s)

Set to 0.1 s (0 ... 100 s)

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, measuring cell
with silicone oil, room temperature 25 °C (77 °F), span ratio (r = max. span / set span)

Measurement deviation with cut-off point set-
ting, including hysteresis and repeatability.

Gage pressure

Absolute
pressure

(Absolute
pressure,
front-
flushed)

Gage pressure

Absolute
pressure

(Absolute
pressure,
front-
flushed)

Linear characteristic curve

≤ 0,075%

≤ 0,1%

≤ 0,2%

• r

≤ 10

≤ (0.0029 ⋅ r + 0.071)% ≤ 0,1%

≤ 0,2%

• 10 < r

≤ 30

≤ (0.0045 ⋅ r + 0.071)% ≤ 0,2%

≤ 0,4%

• 30 < r

≤ 100

≤ (0.005 ⋅ r + 0.05)%

-

-

Settling time T

63

without electrical damping

Approx. 0.2 s

Long-term drift at

± 30 °C (± 54 °F)

≤ (0.25 ⋅ r)%/5 years

≤ (0.1 ⋅ r)%/year

≤ 0.25%/5 years

≤ 0.1%/year

Influence of ambient temperature

• at -10 ... +60 °C (14 ... 140 °F)

≤ (0.1 ⋅ r +0.2)%

≤ (0.2 ⋅ r

+0.3)%

≤ 0,3%

≤ 0,5%

• at -40 ... -10 °C and +60 ... +85 °C

(-40 ... 14 °F and 140 ... 185 °F)

≤ (0.1 ⋅ r + 0.15)% / 10 K

≤ (0.2 ⋅ r +

0.3)%/10 K

≤ 0.25%/10 K

≤ 0.5%/

10 K

Influence of the medium temperature (only
with front-flush diaphragm)

• Temperature difference between medium

temperature and ambient temperature

3 mbar/10 K (0.04 psi/10 K)

SITRANS P300 for gage pressure and absolute pressure

HART

PROFIBUS PA and FOUNDATION Fieldbus

© Siemens AG 2008