digitalYEWFLO Vortex Flowmeters

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	digitalYEWFLO Vortex Flowmeters

The new digitalYEWFLO SSP Amplifier used in the digitalYEWFLO series Vortex Flowmeter is backwards compatible with earlier YEWFLO vortex flowmeters, enabling them to be retrofitted with the best vortex measurement technology available today.

Product Information

The digitalYEWFLO vortex flowmeter combines the field proven sensor and body assembly used in more than 260,000 units installed worldwide with a unique and powerful combination of digital technology that includes spectral signal processing (SSP), a Yokogawa innovation. The digitalYEWFLO vortex flowmeter is accurate and stable, even in harsh process conditions, and has a highly reliable and robust design that delivers improvements in plant efficiency and reduced operating costs

		digitalYEWFLO Series catalog (416KB)

		DY and DYA Vortex Flowmeter General Specifications (985KB)

		List of digitalYEWFLO Vortex Flowmeters general specifications

		List of digitalYEWFLO Vortex Flowmeters drawings

Features: digitalYEWFLO Vortex Flowmeter

-	New functions with Spectral Signal Processing (SSP) technology
	SSP analyses the fluid conditions inside the digitalYEWFLO vortex flowmeter and uses the data to automatically select the optimum adjustment for the application, providing features never seen before in a vortex flowmeter. SSP accurately senses vortices in the low flow range, providing outstanding flow stability.

-	Advanced self-diagnostics
	Application conditions such as high pipeline vibration and abnormal flow are predicted and indicated.

-	High accuracy
	±0.75% of reading (liquid) ±1.0% of reading (gas, steam)

-	Wide process temperature range
	High temperature version up to 450 deg C Cryogenic version minimum -196 deg C

-	Simple parameter settings
	Frequently-used selections grouped together in a quick-access format decrease commissioning time

-	Clear, concise indicator
	Convenient display of the simultaneous and total flow rates together with the process diagnosis

-	Dual output for analog/pulse
	Simultaneous output for flow rate and pulse

-	Alarm output
	An alarm signal is output when an alarm occurs.

-	BRAIN/HART communication and key switches for human-machine interface

-	NACE compliant

-	NAMUR 43 compliant

-	Remote cable length up to 30m

Product Information: multivariable type

digitalYEWFLO Multivariable Type Vortex Flowmeter

		digitalYEWFLO Series catalog (416KB)

		DY and DYA Vortex Flowmeter General Specifications (985KB)

		List of digitalYEWFLO Vortex Flowmeters general specifications

		List of digitalYEWFLO Vortex Flowmeters drawings

Features: digitalYEWFLO multivariable vortex flowmeter

Multivariable Type: option code /MV
-	Resistance temperature sensor built into vortex shedder bar
-	User selectable Flow, Temp, Total and other displays
-	Mass flowrate calculated using temperature readings and steam table data
-	Able on its own to output mass flowrate

Saturated Steam Measurement Mechanism


<How can the density of steam be calculated from a temperature reading? > A steam table provides data on the temperature, pressure and density of steam and is provided by a certification body such as the ASME. The saturated steam curve shows the steam saturation point for each pressure/temperature level. The digitalYEWFLO converter calculates the mass flowrate using the density figure from the steam table. With its Spectral Signal Processing system, the digitalYEWFLO is able to accurately measure fluctuations in temperature. - With superheated steam, density is calculated as a fixed pressure value that includes the superheated temperature value.

With the totalization function, energy consumption data collected over a period of time can be stored in memory and used to devise measures for reducing energy consumption.

Specifications: digitalYEWFLO vortex flowmeter

Standard

Multi-Variable

Model & code

DY Vortex Flowmeter
DYA Vortex Flowmeter-remote type converter

Optional code:/MV

Measures

Liquid, gas, steam (avoid multiphase flow and sticky fluids)

Accuracy

Liquid:
	±0.75% of reading
Gas and steam:
	±1.0% of reading (velocity 35m/s or less) ±1.5% of reading (velocity 35m/s to 80m/s)

Mass flow rate: ±2.0% of reading
Fluid temperature:
	Saturated steam or liquid: ±0.5 deg C
	Superheated steam or gas: ±1 deg C

Repeatability

±0.2% of reading

Output signals

Analog:
	4 to 20 mA DC, 2-wire system
Transistor contact output:
	Open collector, 3-wire system
Pulse, alarm, status output selected by parameter setting Contact rating:
	30 V DC, 120 mA DC
Pulse frequency:
	max.10kHz
Duty cycles:
	approx.50% (1:2 to 2:1)

Analog output:
	Selected from flow rate and temperature outputs
Transistor contact output:
	When selecting pulse: Flow rate output When selecting alarm: Temperature sensor failure output When selecting status: Flow switch signal

Supply voltage

10.5 to 42 V DC
16.4 to 42 V DC for digital communications BRAIN and HART protocols
(16.4 to 30 V DC for intrinsically safe type)

Process temperature

-29 to 260 deg C (general)
-196 to 100 deg C (cryogenic version: option)
-29 to 450 deg C (high process temperature version: option)

Process pressure

-0.1 MPa (-1kgf/cm ²) to flange rating

Ambient temperature

-29 to 85 deg C (Integral type / No indicator)
-29 to 80 deg C (Integral type / with indicator)
-29 to 85 deg C (Remote type detector)
-40 to 85 deg C (Remote type converter / No indicator)
-30 to 80 deg C (Remote type converter / with indicator)

Ambient humidity

5 to 100 RH (at 40 deg C) (no condensation)

Normal diameter

15 to 300 mm

25 to 200 mm

Process connection

JIS10, 20, 40k, ANSI Class 150, 300, 600, 900
DIN PN 10, 16, 25, 40, 64, 100

Electrical connection

JIS G1/2 female, ANSI 1/2 female, ISO M20 x 1.5 female

Electrical classification
(now preparing)

JIS flameproof, FM explosion proof/intrinsically safe
ATEX (CENELEC flameproof/intrinsically safe/IEC type n)
CSA explosion proof/intrinsically safe
SAA flame proof/intrinsically safe

Materials (general)

Body: SCS14A/CF8M casting stainless steel

Shedder bar: duplex stainless steel

Gasket: JIS SUS316 stainless steel with polytetrafluoroethylene (Teflon) coating

Converter housing and case, cover: aluminum alloy

Coating color

Converter case, cover: deep sea moss green (polyurethane corrosion-resistant coating)

Functions

*Spectral Signal Processing

*Self-diagnostics

*Analog and pulse simultaneously output

*Instrumental error correction