Siemens technical specifications 124, Sitrans P, DS III series for level

© Siemens AG 2008

SITRANS P measuring instruments for pressure

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

DS III series for level

■Technical specifications

SITRANS P, DS III series for level

			HART		PROFIBUS PA or FOUNDATION Fieldbus
2	Input
	Measured variable		Level
	Spans (infinitely adjustable) or		Span	Maximum working	Nominal measuring	Maximum working
	nominal measuring range and			pressure	range	pressure
	max. permissible working pressure		25 ... 250 mbar g	See "Mounting flange"	250 mbar g	See "Mounting flange"
			(0.36 ... 3.63 psi g)		(3.63 psi g)
			25 ... 600 mbar g	See "Mounting flange"	600 mbar g	See "Mounting flange"
			(0.36 ... 8.7 psi g)		(8.7 psi g)
			53 ... 1600 mbar g	See "Mounting flange"	1600 mbar g	See "Mounting flange"
			(0.77 ... 23.2 psi g)		(23.2 psi g)
			160 ... 5000 mbar g	See "Mounting flange"	5000 mbar g	See "Mounting flange"
			(2.32 ... 72.5 psi g)		(72.5 psi g)
	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		RB ≤ (UH - 10.5 V)/0.023 A in Ω,
					-
			UH : Power supply in V
	• With HART communication		RB = 230 ... 500 Ω (SIMATIC PDM) or		-
			RB = 230 ... 1100 Ω (HART Communicator)
	Physical bus		-		IEC 61158-2
	With polarity reversal protection		-		Yes
	Accuracy		To EN 60770-1
	Reference conditions		Increasing characteristic, start-of-scale value 0 bar, stainless steel seal diaphragm, silicone oil fill-
	(All error data refer always refer to the set span)		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		≤ (0.25 ⋅ r)% every 5 years		≤ (0.25% every 5 years
	(±54 °F))		static pressure max. 70 bar g (1015 psi g)		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)%		≤ 0,7%
			(0.4 instead of 0.2 with 10 < r ≤ 30)
	- 600 mbar (8.7 psi) measuring cell		≤ (0.3 ⋅ r + 0.2)%		≤ 0,5%
			(0.4 instead of 0.2 with 10 < r ≤ 30)
	- 1600 and 5000 mbar (23.2 and 72.5 psi)		≤ (0.25 ⋅ r + 0.2)% (0.4 instead of 0.2 with 10 < r		≤ 0,45%
	measuring cells		≤ 30)
	• 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		≤ 0.4%/10 K
			double values with 10 < r ≤ 30
	- 600 mbar (8.7 psi) measuring cell		≤ (0.15 ⋅ r +0.15)%/10 K		≤ 0.3%/10 K
			double values with 10 < r ≤ 30
	- 1600 and 5000 mbar (23.2 and 72.5 psi)		≤ (0.12 ⋅ r +0.15)%/10 K		≤ 0.27%/10 K
	measuring cells		double values with 10 < r ≤ 30

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Siemens FI 01 · 2009