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© Siemens AG 2009
Differential Pressure
Product family introductionPrincipals of operationProduct reviewApplicationsKey product features
Page 2
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
Liquid level transmitter
Absolute-pressuretransmitter
Pressure transmitter
Differential pressure andflow transmitter
Complete Product LineProduct family
Principals of operation
Product overview
Applications
Key features
Product Family Introduction – DS III Pressure Transmitter
Page 3
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
Simplified View of how an Orifice Plate works
-A High pressure is required to force the fluid thru the small hole in the orifice plate-When the flow passes thru the hole in the plate it is at a lower pressure because of the small diameter is emptying into the larger diameter
P2P1Product family
Principals of operation
Product overview
Applications
Key features
DP Flow Theory
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© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
Venturi Tube & Orifice Plate utilizes Bernoulli’s Equation & Conservation of Energy to measure flow
-Flow is the product of the Velocity and the Area-Velocity is dependent upon Cross sectional area in Area 1 & 2-Energy consists of Static (mgh) term and Kinetic (½mV²) term
Thus the difference in pressure is related to the square of the velocity, this is why the square root of the DP is equal to Flow
P2
V1
P1
V2
P2P1Product family
Principals of operation
Product overview
Applications
Key features
DP Flow Theory
Page 5
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
P2
V1
P1
V2
Orifice Plate6:1 Rangeability
Venturi200:1 Rangeability
P2P1
For these Primary ElementsFlow = K*β*�DP
Product family
Principals of operation
Product overview
Applications
Key features
DP Flow Theory
Page 6
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
5 year Powered Warranty
350 yr MTBF
100% for 3 yearsBased on
Operating Hours Meter
Product family
Principals of operation
Product overview
Applications
Key features
Siemens DS III
Page 7
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
Can be set on site or via digital communication(HART protocol, Profibus PA)
Zero and Full Scale can be set on site without applying pressure (blind adjustment)
Electrical dampingLoop check functionLinear/sq. root characteristic
curve with differential pressuretransmitter
Output signal in the case of error (3.6 mA or 22.8 mA)
Push Button LockoutPlant-specific effects
(such as position error) compensated at the press of a button
Siemens DS III
Transmitter Configuration
Product family
Principals of operation
Product overview
Applications
Key features
Page 8
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
SPAN
ZERO
Present value
Select Parameterwith Mode Button
Change valueof the parameter
Mode number
mA
Siemens DS IIIConfiguration with Magnetic Pushbuttons
Product family
Principals of operation
Product overview
Applications
Key features
Page 9
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
-Operating Hours Meter-Two Elapsed Time Meters-Six -- Min / Max Registers-Three Configurable Event Counters-Output Current Alarms-Simulation Output
Siemens DS III
World Class Diagnostics
Product family
Principals of operation
Product overview
Applications
Key features
Page 10
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
Product family
Principals of operation
Product overview
Applications
Key features
Siemens DS III
Applications
DP Transmiters are used in many flow applications
Gas, Liquid or Steam FlowPressures from atmosphere to >6000 PSITemperature from Cryogenic to >1000 F
Used Everywhere, But Most Popular In Refining & PetrochemicalsOil & GasPower, both Utility and Industrial
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© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
SITRANS P Series DS III Pressure Transmitter
No Handheld Needed!World Class Diagnostics!!
Product family
Principals of operation
Product overview
Application
Key features
High accuracy (0.071+.0029*TD)% (incl. hysteresis + repeatability)
High long-term stability of 0.25% per 5 yearsMeasuring spans of 0.4“ H2O to 5800 psiLocal setup without HandheldExotic Diaphragms for aggressive process
materials
Electronics and Capsule are Independent4-20mA HART or PROFIBUS-PA Hazardous Area ratings from FM, CSA & CENELECIntrinsically Safe, Explosion proof & FlameproofWorld Class Diagnostics
5 Year Powered Warranty
Page 12
© Siemens Energy & Automation, Inc. 2009This document includes confidential data that shall not be duplicated, used, distributed, or disclosed for any purpose unless authorized by Siemens.
Flow seminar
DP FlowLargest installed base Fits any size pipeVariety of primary elementsOrifice, Venturi, Nozzle, Pito…0.75% - 2% accuracyLocal set-up and diagnosticsLiquids / Gas / SteamNo liquid or gas restrictionsApprovals FM/CSA Class I, Div I & II
