西门子模块代理商|东莞PLC模块代理商

西门子模块代理商|东莞PLC模块代理商西门子模块代理商|东莞PLC模块代理商西门子模块代理商|东莞PLC模块代理商

功能

The SITRANS FC flow measuring principle is based on theCoriolis effect. The flowmeter consists of a sensor and atransmitter. The sensor can be digital with an integrated frontendDSL or for low flow sensors also analogue sensors directlyconnected to the transmitter.

There are following sensors available:

SITRANS FC MASS 2100 DI 1.5 to DI 15 mm ina single loop design

SITRANS FC300 DN 4 in a single loop design

SITRANS FCS300 DN 15 to DN 150 mm in bendeddual tube design

SITRANS FCS400 DN 15 to DN 50 mm in a compactbended dual tube design for OEM and other specificapplications.

All sensors can be freely combined with three differenttransmitters in various configurations and protection style.

SITRANS FCT010 transmitter: single channel Modbus

SITRANS FCT030 transmitter: multi channel transmitter withfull graphical display and full feature loaded.

FCT070 transmitter: for full integration in the SiemensSIMATIC TIA and PCS7 world by the ET 200SP ST & HF. Full functionality including advancedfunctions blocks for easy integration . Functions block in TIA andAPL library

The SITRANS FC sensors are energized by an electro-mechanicaldriver circuit which oscillates the pipe at its resonantfrequency.

Two pick-ups, 1 and 2 are placed symmetrically on both sides of thedriver. When liquid or gas flows through the sensor, Coriolis forcewill act on the measuring pipe and cause a pipe deflection whichcan be measured as a phase shift on pick-up 1 and 2. The phaseshift is proportional to the mass flow rate.

The amplitude of the driver is automatically regulated to ensure astable output from the 2 pick-ups. The temperature of the tubes ismeasured by a Pt1000. The flow-proportional signal from the 2pick-ups, the temperature measurement and the driver frequency arefed into the SITRANS FC transmitter for calculations of mass,volume, fraction, temperature and density.The signal transferfunction is based on a DFT technology (Discrete FourierTransformation).

The transmitter has built-in noise filters, which can be used toimprove the meter’s performance if the installation and applicationconditions are not ideal. Typically influence from process noisesuch as pump pulsations, mechanical vibrations, oscillating valvesand aerated flowconditions can be reduced considerably.

SensorFlash flow memory units

FCT010 flow transmitters communicate via Modbus RTU and FCT030 viaHART/Modbus/PROFIBUS DP / PROFIBUS PA beside up to 4individual I/O free programmable as analogue , frequency, pulse orrelay outputs. As well as static inputs can be set up.

The FCT070 transmitter is a technology module for theSIMATIC ET 200SP ST & HF system withdirectly connection from the digital sensor. Full transmitterfunctionality available to be set up directly in the SIMATICsystem. The ET 200SP is very often connected to other SIMATICsystems like PCS7; S7 1200 and S7 1500 via the directconnection by PROFINET. Fast and simple signal transfer andcontrolling.

集成

The SITRANS FC mass flowmeter is suitable for in- and outdoorinstallations. The standard instrument meets the requirements ofProtection Class IP67/NEMA 4x or IP65. The flowmeter isbidirectional and can be installed in almost any orientation,however, the sensor is not self-emptying in all positions.

It is important to ensure that the meter tubes are alwayscompletely filled with homogeneous fluid. Otherwise measuringerrors may occur. Suitable fluids are clean liquids, pastes, lightslurries or gases. Condensing vapors, aerated liquids or slush arenot recommended.

The corrosion and erosion resistance of the fluid-wetted materialsmust be evaluated to secure long lifetime of the sensor. Thepressure drop through the sensor is a function of the properties ofthe fluid and the flow rate. The Sizing Program (downloadfrom www.) can be used to calculate the pressure drop and theaccuracy over the full flowrange in use for the application.

Sizing

Liquids: The correct sensor size is determent by the allowablepressure drop at the maximum flowrate the meter is used with. Afterselecting the sensor size the accuracy throughout the flowraterange for the application can be checked by using the SizingProgram.

Gases: The correct size is very often determent by the calculationof the Mach number at maximum flowrate for the application. Afterthat the accuracy throughout the flowrange should be checked.

The preferred flow direction is indicated by the arrow on theflowmeter. Flow in this direction will be indicated aspositive.

Note: For some sensor types, specific installation requirementhas be taken into account. Please also see under the specificsensor type chapter.

Generel installation orientation