For gage pressure, Sitrans p measuring instruments for pressure, Ds iii series for gage pressure 2/70 – Siemens SITRANS P User Manual

Page 70

SITRANS P measuring instruments for pressure

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

DS III series
for gage pressure

2/70

Siemens FI 01 · 2009

■

Technical specifications

SITRANS P, DS III series for gage pressure

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
(2.23 ... 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)

1.6 ... 160 bar g
(23.2 ... 2320 psi g)

250 bar g
(3626 psi g)

160 bar g
(2320 psi g)

250 bar g
(3626 psi g)

4.0 ... 400 bar g
(58 ... 5802 psi g)

600 bar g
(8700 psi g)

400 bar g
(5802 psi g)

600 bar g
(8700 psi g)

7.0 ... 700 bar g
(102 ... 10153 psi g)

800 bar g
(11603 psi g)

700 bar g
(10153 psi g)

800 bar g
(11603 psi g)

Lower measuring limit

• Measuring cell with silicone oil filling

30 mbar a (0.435 psi a)

• Measuring cell with inert filling liquid

30 mbar a (0.435 psi a)

Upper measuring limit

100% of max. span (max. 160 bar g (2320 psi g) with oxygen measurement and inert liquid)

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

≤ (U

- 10.5 V)/0.023 A in

Ω,

: Power supply in V

• With HART communication

= 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 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)%

(at 700 bar:

≤ (0.1 ⋅ r + 0.2)%)

≤ 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

Measured Value Resolution

⋅ 10

-5

of nominal measuring range