Yokogawa DY015-EBLAD4-2D/CH/SCT digitalYEWFLO Vortex Flowmeter

Detailed Model Code Nomenclature

Full Model Code: DY015-EBLAD4-2D/CH/SCT

Detailed Technical Specifications

Performance Specifications

• Accuracy:

  • Liquid: $\pm0.75\%$ of reading

  • Gas & Steam: $\pm1.0\%$ of reading

• Repeatability: $\pm0.2\%$ of reading

• Turn-down Ratio: Up to 20:1 (depending on process density and velocity)

• Measurable Media: Clean Liquids, Gases, Saturated Steam, Superheated Steam

Electrical & Communication

• Power Supply: 10.5 to 42 V DC (16.4 to 42 V DC for HART communication)

• Analog Output: 4–20 mA DC, 2-wire system (with NAMUR NE43 burn-out support)

• Pulse / Status Output: Open collector transistor (3-wire system) for batching, totalizing, or flow switch alarms

• Digital Communication: HART Protocol superimposed on 4–20 mA signal

• Local Display (-2D): Multi-function LCD showing Instantaneous Flow Rate, Flow %, Totalized Volume, and Self-Diagnostic Alarms.

Process & Environmental Conditions

• Fluid Temperature Limits: $-29^{\circ}\text{C}$ to $+250^{\circ}\text{C}$ (Standard Version)

• Process Pressure Limit: $-0.1\text{ MPa}$ to Flange Pressure Rating (DIN PN40 / 40 bar)

• Ambient Temperature Range: $-29^{\circ}\text{C}$ to $+80^{\circ}\text{C}$ (Integral type with LCD display)

• Ambient Humidity: 5% to 100% RH at $40^{\circ}\text{C}$ (non-condensing)

Mechanical & Housing

• Nominal Size: DN15 / 1/2 Inch

• Flange Rating: EN 1092-1 DIN PN40 Raised Face (RF)

• Wetted Materials: Body: SCS14A Stainless Steel; Shedder Bar: Duplex Stainless Steel S31803

• Converter Housing: Cast Aluminum Alloy ADC12 with Polyurethane Anti-Corrosion Coating

• Degree of Protection: IP66 / IP67 (IEC 60529), Type 4X (NEMA 250)

Measurement Principle & SSP Technology

The Yokogawa digitalYEWFLO DY015 utilizes the fundamental Karman Vortex Street Principle combined with digital signal processing:

1. Vortex Generation: When fluid flows past the stationary shedder bar, alternating vortices are generated on downstream sides at a frequency ($f$) directly proportional to flow velocity ($v$).

2. Piezoelectric Sensing: Dual piezoelectric sensors embedded inside the shedder bar detect minute stress changes from vortex shedding.

3. Spectral Signal Processing (SSP): Unlike legacy analog flowmeters that rely on fixed bandpass filters, digitalYEWFLO continuously analyzes the frequency spectrum of the sensor signals. SSP isolates true vortex frequencies while eliminating piping vibration noise and hydraulic pressure surges, guaranteeing unmatched zero stability.

 Output & System Communication Options

• Simultaneous Dual Output: Configured to deliver both an analog 4–20 mA DC loop signal for PLC/DCS continuous monitoring and a pulse/status contact output for totalization or low-flow threshold alarms.

• HART Field Configuration: Wirelessly or wired connection using handheld HART calibrators (Emerson Trex, Yokogawa FieldMate, etc.). Key parameters like span, damping, units (kg/h, m³/h, L/min), and totalizer resets can be adjusted on site without opening the electronics cover.

• EEPROM Data Security: Configuration parameters and totalizer counts are stored in non-volatile EEPROM memory, eliminating the need for backup batteries during power outages.

Advantages for Buyers & Procurement Engineers

• Zero Moving Parts = Minimal Total TCO: Reduces maintenance downtime and spares inventory—no bearings, impellers, or seals to replace over time.

• High Vibration Resistance: Resolves common false-flow count issues caused by pump, compressor, or piping vibrations in industrial plants.

• Universal Fluid Capability: Versatile application across liquid, compressed air, nitrogen, saturated steam, and thermal oil systems.

• Audit & Export Ready: Shipped with the official China domestic compliance certification (/CH) and a factory-engraved stainless steel tag plate (/SCT) for seamless inspection and traceability.

Maintenance & Advanced Diagnostics

• Self-Diagnostic Alerts: Internal microprocessors continuously check sensor continuity, board temperature, EEPROM status, and flow range limits, displaying error codes directly on the LCD screen or via HART status.

• Dual-Compartment Housing: Terminal wiring is isolated from the main amplifier circuit board, protecting sensitive digital components from moisture or dust ingress during field wiring.

• In-situ Zero Point Stability: Thanks to SSP algorithms, no periodic zero adjustment is required during regular field maintenance.

Standards, Protections & Certifications

• Protection Rating: IP66/IP67 according to IEC 60529, Type 4X per NEMA 250.

• EMC Standards: Conforms to EN 61326-1 Class A and EN 61326-2-3 for industrial electromagnetic compatibility.

• Flange Standard: Built to EN 1092-1 / DIN PN40 Raised Face standard.

• Traceability: Supplied with a SUS304 Stainless Steel Tag Plate (/SCT) engraved with customer-specified tag numbers.

Frequently Asked Questions (FAQ)

Q1: What media can the Yokogawa DY015 flowmeter measure?

• A: It accurately measures clean liquids, compressed air, industrial gases, and saturated or superheated steam. It is not recommended for slurries or fluids with high viscosity ($> 10 \text{ cSt}$).

Q2: What are the upstream and downstream straight pipe requirements for DY015?

• A: To maintain rated accuracy ($\pm0.75\%$ for liquid, $\pm1.0\%$ for gas/steam), a minimum of 20D upstream and 5D downstream straight pipe run is required. Longer upstream runs (25D–40D) or flow conditioners may be needed downstream of elbows or control valves.

Q3: How does Spectral Signal Processing (SSP) improve measurement?

• A: Conventional vortex flowmeters can misinterpret plant pipe vibration as flow rate. Yokogawa’s SSP digitally filters out non-vortex noise frequencies, allowing accurate zero-flow measurement and stable readings even in high-vibration piping systems.

Q4: Can I read the instantaneous flow rate and total flow on the device?

• A: Yes, the -2D option includes an integrated LCD display that can cycle between instantaneous flow rate, flow percentage, totalized flow, and self-diagnostic error codes.

Q5: Is this model suitable for steam mass flow calculation?

• A: The standard DY015 measures volumetric flow. For direct saturated steam mass flow measurement with integrated temperature sensors, consider the Yokogawa digitalYEWFLO Multi-Variable type (e.g., /MV option).

Target Industrial Applications

• Chemical & Petrochemical: Solvents, process water, nitrogen gas, and chemical feed lines.

• Power & Utility Plants: Saturated steam monitoring, boiler condensate, compressed air systems.

• Food & Beverage Processing: Hygienic utility steam, clean water, and CIP liquid metering.

• HVAC & District Heating: Chilled water and hot water thermal distribution.

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