For level, Sitrans p measuring instruments for pressure, Ds iii series for level 2/124 – Siemens SITRANS P User Manual

Page 124

SITRANS P measuring instruments for pressure

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

DS III series
for level

2/124

Siemens FI 01 · 2009

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Technical specifications

SITRANS P, DS III series for level

HART

PROFIBUS PA or FOUNDATION Fieldbus

Input

Measured variable

Level

Spans (infinitely adjustable) or
nominal measuring range and
max. permissible working pressure

Span

Maximum working
pressure

Nominal measuring
range

Maximum working
pressure

25 ... 250 mbar g
(0.36 ... 3.63 psi g)

See "Mounting flange"

250 mbar g
(3.63 psi g)

See "Mounting flange"

25 ... 600 mbar g
(0.36 ... 8.7 psi g)

See "Mounting flange"

600 mbar g
(8.7 psi g)

See "Mounting flange"

53 ... 1600 mbar g
(0.77 ... 23.2 psi g)

See "Mounting flange"

1600 mbar g
(23.2 psi g)

See "Mounting flange"

160 ... 5000 mbar g
(2.32 ... 72.5 psi g)

See "Mounting flange"

5000 mbar g
(72.5 psi g)

See "Mounting flange"

Lower measuring limit

• Measuring cell with silicone oil filling

-100% of max. span or 30 mbar (0.435 psi a), depending on mounting flange

Upper measuring limit

100% of max. span

100% of the max. 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

≤ (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 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)

• Linear characteristic

≤ 0.075%

- r

≤ 10

≤ 0.15%

- 10 < r

≤ 30

≤ 0.3%

- 30 < r

≤ 100

≤ (0.0075 ⋅ r + 0.075)%

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)

Influence of ambient temperature

• at -10 ... +60 °C (14 ... 140 °F)

- 250 mbar (3.63 psi) measuring cell

≤ (0.5 ⋅ r + 0.2)%

(0.4 instead of 0.2 with 10 < r

≤ 30)

≤ 0,7%

- 600 mbar (8.7 psi) measuring cell

≤ (0.3 ⋅ r + 0.2)%

(0.4 instead of 0.2 with 10 < r

≤ 30)

≤ 0,5%

- 1600 and 5000 mbar (23.2 and 72.5 psi)

measuring cells

≤ (0.25 ⋅ r + 0.2)% (0.4 instead of 0.2 with 10 < r

≤ 30)

≤ 0,45%

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

(-40 ... +14 °F and 140 ... 185 °F)

- 250 mbar (3.63 psi) measuring cell

≤ (0.25 ⋅ r +0.15)%/10 K

double values with 10 < r

≤ 30

≤ 0.4%/10 K

- 600 mbar (8.7 psi) measuring cell

≤ (0.15 ⋅ r +0.15)%/10 K

double values with 10 < r

≤ 30

≤ 0.3%/10 K

- 1600 and 5000 mbar (23.2 and 72.5 psi)

measuring cells

≤ (0.12 ⋅ r +0.15)%/10 K

double values with 10 < r

≤ 30

≤ 0.27%/10 K