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Low flow Intermediate flow (Reverse flow) High flow High flow/ (Forward flow) Low flow Batch on digital output (MAG 6000 only) Batch on relay Hold Batch (MAG 6000 only) 1.2 Output characteris-tics MAG 5000 & MAG 6000 1.3.1 Sensor cables and conductivity of medium 1.3.2 Minimum accept data for cable Coil cable Electrode cable Basic data No. Find danfoss manuals at valinonline.com. All documents are viewed and printed as a Portable Document Format (PDF) file. Contents 1 Introduction 4 1.1 Software Version 4 1.2 Approvals 4 1.3 Definitions 4 1.3.1 Frequency Converter 4 1.3.2 Input 4 1.3.3 Motor 4 1.3.
*Danfoss Flow Meter User Manual User
*Danfoss Flow Meter User Manual Pdf
*Danfoss Fc302 Programming Manual
*Danfoss Flow Meter User Manual Transfer Switch
*Danfoss Vlt2800 Programming Manual

Basic Elements
Just like other flowmeters, differential pressure flowmeters consist of two elements. They are:
A primary element: This element causes a change in kinetic energy which results in the differential pressure in the pipe. The unit must be suitably matched to the
*pipe size,
*flow conditions, and
*the liquid’s properties
Besides, the measurement accuracy of the element must be fine over a practical range.
A secondary element: The secondary element measures the differential pressure created by primary element and gives the signal or read-out which is in turn transformed to the actual flow value.
Types of Differential Pressure Flowmeters

Most widely used differential pressure flowmeters are:
*Orifice Plates
*Flow Nozzles
*Venturi Tubes
*Variable Area flowmeters, i.e. Rotameters

Accuracy & Rangeability
Performance of a head-type flowmeter installation is a function of the
*precision of the flow element and
*the accuracy of the d/p cell
On average, flow element precision is expressed in percentage of actual reading terms, whereas d/p cell accuracy is stated as a percentage of calibrated span. A d/p cell typically provides accuracy of ±0.2% of the calibrated span. With no detrimental effect on accuracy, rangeability of a flowmeter can be extra enhanced by employing several d/p flowmeters in parallel runs.
Lytec 2018 manual form.
Errors and Noise
In case of compressible fluids, the ratio of differential pressure divided by upstream pressure should not exceed 0.25 for reduction of error and correction of density. Metering errors caused due to wrong installation of the primary element can become considerable i.e. up to 10%. Following are the possible causes of these errors:
*the condition of the mating pipe sections
*insufficient straight pipe runs
*pressure tap and lead line design errors
In turbulent flow conditions, not more than 10% of the d/p signal could possibly be noise produced by disturbances from valves and fittings. These disturbances can be both up- and downstream of the element, and by the element itself. To sort out this noise, a damping is provided in d/p cells which prove to be adequate for majority of the applications. Rigorous noise can be diminished by applying two or more pressure taps connected in parallel on both sides of the d/p cell.
Sources
OmegaTech
Engineering Toolbox
Omega.literature
Here you will find our documentation such as data sheets and operating manuals for our measuring instruments. If you do not find the document, approval or certificate you are looking for, please contact us, we look forward to hearing from you (info@metra-emt.de)!
Your team from METRA Energie-Messtechnik GmbHBrochuresProduct data sheetsMeasurement system “oriflow” with compact orificeMeasurement system “autarkon” with compact orifice – EWZ 120.1 & EWZ 127.1Measurement system “autarkon” with standardized differential pressure devices – EWZ 140.1/147.1Measurement system “autarkon” with venturi tube 150.1/157.1 Steam / GasMeasurement system “autarkon” with venturi tube – 150.1/157.1 LiquidsMeasurement system “autarkon” with cross probe – EWZ 211.7Measurement System “autarkon” with cross probe – EWZ 311.7Ultra sonic meter for heat / cooling applications – EWZ 817Ultra sonic meter for heat / cooling applications – EWZ 817GUltra sonic meter for heat / cooling applications – EWZ 817TUltra sonic meter for heat / cooling applications – EWZ 837Magnetic inductive meters for cooling applications – EWZ 617Magnetic inductive meters for cooling applications – EWZ 617 calibratedVortex Meter – VTX3Flow and Energy Calculator – ERW 700Temperature sensorOperating ManualsMeasurement system “oriflow” with compact orificeMeasurement system “autarkon” with compact orifice – EWZ 120.1 & EWZ 127.1Measurement system “autarkon” with standardized differential pressure divices – EWZ 140.1/147.1Flow and energy calculator ERW 700Flow and energy calculator ERW 700, “M-Bus Extension”Flow and energy calculator ERW 700, “Profibus Extension”Flow and energy calculator ERW 700, “RS 485 Extension”Flow and energy calculator ERW 700AFlow and energy calculator ERW 700(A) “Modbus Extension”Measurement system “autarkon” with cross probe – EWZ 211.7Measurement system “autarkon” with cross probe – EWZ 311.7Ultra sonic meter for heat / cooling applications EWZ 817 / EWZ 837Magnetic inductive meters for cooling applications – EWZ 617Vortex Meter – VTX3Vortex Mester VTX3 additional Manual Ex-protectionTemperature sensorDanfoss Flow Meter User Manual UserAPPLICATION EXAMPLESteam Measurement by mean of a ISA 1932 NozzleStandard volume flow measurement Venturi tubeMIDMesssystem “autarkon” mit KreuzsondeDurchfluss- und Energierechner – WärmeDurchfluss- und Energierechner – KälteDanfoss Flow Meter User Manual PdfPressure Equipment DirectiveEC Type Examination Certificate Module H Vortex Meter VTX3Danfoss Fc302 Programming ManualEC Type Examination Ex- ApprovalsDanfoss Flow Meter User Manual Transfer SwitchEU Type Examination Certificate Vortex Meter VTX3 KIWA 18 ATEX 0041 XDeclaration of conformity / Declaration of manufacturerDanfoss Vlt2800 Programming ManualQM
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