Yokogawa F050H517CQBAEZ1ZZ DY Vortex Flowmeter Unit

Module Feature

F050H517CQBAEZ1ZZ is a full-code model variant of Yokogawa DY vortex shedding flowmeter, nominal diameter DN50.

It adopts Karman vortex bluff body structure, the piezoelectric sensor captures vortex frequency signal, and the frequency value is converted into volumetric flow. The multivariable version supports built-in temperature and pressure compensation to realize mass flow calculation for saturated steam, superheated steam and various gases. It features two-wire 4-20mA analog signal with HART digital communication, local LCD indicator, ATEX/IECEx hazardous area option, low pressure loss and wide turndown ratio. Widely stocked as maintenance spare for boiler steam pipeline, process gas and liquid measurement skids in chemical plants and power stations.

Working principle

When the medium flows through the bluff body inside the meter tube, regular alternating vortexes are generated.

The piezoelectric element detects the vibration frequency of vortex shedding, the frequency is proportional to the flow velocity of the medium. The transmitter circuit calculates the volume flow; for steam and gas, mass flow is obtained through temperature-pressure compensation algorithm. HART bus transmits tag, diagnostic information and process variables to DCS system. Continuous self-check monitors sensor signal, over-range and loop wiring faults.

Onboard components

Bluff body, piezoelectric vortex sensing probe, signal conditioning circuit, HART communication chip, local LCD display, terminal compartment, explosion-proof aluminum transmitter housing and stainless steel meter body.

LED indicators

Local LCD screen displays instantaneous flow, totalizer, medium temperature, pressure value, tag information and fault codes.

Hardware self‑diagnosis

Built-in supervision detects weak sensor signal, over-range, electronics failure and loop wiring abnormality. Calibration and parameter configuration are completed by HART communicator or Yokogawa FieldMate software.

Programming softwareFieldMate, used for K-factor setting, density compensation configuration, totalizer reset, tag editing and fault diagnosis record query.

Electrical & Process Parameters

Model:F050H517CQBAEZ1ZZ Brand:Yokogawa Device type:DY vortex shedding flowmeter Function:Volumetric and mass flow measurement for gas, steam and liquid medium

Mechanical & Structure

Mounting:Flange inline installation Protection class:IP67 Housing:Stainless steel meter body + flameproof aluminum transmitter housing

Environmental

Operating temperature:-40℃ ~ +80℃ (electronics side; process temperature depends on medium) Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, ATEX/IECEx optional, SIL2/SIL3 available Status:Original Yokogawa process instrument spare

Installation

Isolate the pipeline and fully depressurize before replacement. Reserve sufficient straight pipe sections upstream and downstream, avoid strong vibration, set K-factor and density compensation parameters, verify 4-20mA signal and HART communication after commissioning.

Interface

Two-wire 4-20mA+HART signal terminal, flange process connection.

Diagnostic

No flow reading: Flow rate below measuring threshold, sensor damage, bluff body blocked. Unstable measurement: Insufficient straight pipe section, pipeline vibration interference. HART communication failure: Missing 250Ω loop resistor, reversed polarity, open wiring.

Product BriefF050H517CQBAEZ1ZZ flowmeter, Yokogawa DY DN50 vortex instrument spare for steam and gas flow measurement skid replacement.