UVP-DUO

UVP-DUO is Met-Flow's fourth generation of instrument. With the progress achieved with personal computer and standard communication devices it was decided to separate physically both interface and measurement parts of the UVP instrument for more flexibility. The measurement part, including all measurement conditioning and signal processing, remains as close as possible to the measurement location while the user interface can be located at any place according to available LAN.

With the use of communication standards such as Ethernet and TCP/IP the UVP instrument can now be part of a complex measurement network, making a step forward toward industrial environment. With such option Met-Flow intends to bring its non-intrusive methodology to process control facilities, quality control and such.

Main features

  • Remote controlled from distant PC
  • 5 selectable frequencies
  • Raw echo amplitude acquisition
  • Enlarged parameters ranges
  • Compact design
  • Optional integrated multiplexer
  • 2 models


DUO line


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Download... PDF technical flyer: UVP-DUO hardware (253 kB)


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DUO OPTIONS

UVP-DUO line now integrates the full set of available ultrasonic frequencies, i.e. 0.5, 1, 2, 4, 8 MHz. The multiplexer device remains as an option, like with the former XW line.

Multiplexer
On the MX model an integrated multiplexer is available for those users who wish to carry out multiple probes measurements, either for a measurement at various locations or to achieve 2D measurement (flow mapping).
The multiplexer features 20 probe channels and is internal on the DUO line in order to keep the whole instrument more compact.
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DUO MODELS

DUO-MX
This model has five ultrasonic emitting frequencies (0.5, 1, 2, 4, 8 MHz) and includes a multiplexer (internal). The model is suitable for most demanding scientific and developmental tasks.

DUO
This model has five emitting frequencies (0.5, 1, 2, 4, 8 MHz) but does not have a multiplexer. This model is a good starting point for scientific and developmental tasks with lower budgets.

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PC & SOFTWARE

To control the UVP-DUO instrument a host PC computer equiped with an Ethernet network card is required. Any computer running Microsoft Windows 98, Windows ME, Windows SE, Windows NT 4.0, Windows 2000, Windows XP (Home or Professional edition) can run the UVP-DUO Win32 based program, the minimal PC hardware requirement being the one necessary to run the installed operating system.

The UVP software developed for the UVP-DUO - software version 3 - is a completely new Win32 compatible single program integrating both acquisition and review functions, such as:

  • Remote control of UVP-DUO from host computer via LAN through TCP/IP protocol
  • On-line display and acquisition of raw echo amplitude
  • Turbulent statistics, RMS, skewness, kurtosis, histograms
  • Cross-correlation, auto-correlation, power spectrum
  • Integrated flow mapping module, on-line transducer grid editor
  • Wizard-style measurement parameter setup
  • Direct export to Word, Excel, Tecplot and other applications
  • New file format with all measurement parameters in a single file

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OPTIONAL MULTIPLEXER

A single transducer can measure velocity profile in liquid along a single line. Since measurement and velocity evaluation is very fast, the UVP-DUO-MX instrument with integrated multiplexer can scan through up to 20 transducers simultaneously and still keep interesting time resolution sufficient for most flow measurements.
This allows for easy flow field mapping. The sequence and timing of multiplexer channels are fully programmable.



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UVP-DUO TECHNICAL SPECIFICATIONS

Emitting frequency

0.5, 1, 2, 4, 8 MHz

Emitting voltage on transducer

30, 60, 90, 150 V (for 50-Ohm transducers)

Emitted cycles per pulse (1)

2 to 32 cycles, by step of 2

Pulse repetition frequency (2)

244 Hz to 92'500 Hz

Number of channels

Selectable from 10 to 2'048 channels

Receiving amplification

Exponential, time-dependent, for compensation of distance attenuation

Space resolution - longitudinal (3)

Approx. 0,5 microseconds (transducer-dependant)

Space resolution - lateral (4)

Defined by the transducer used

Channel distance

Variable, from 0,37 mm in water (medium-dependant)

Velocity range resolution

1/256 of maximum velocity (1 LSB)
Raw echo acquisition Same spatial, temporal and range resolution as velocity

Repetition rate (emissions per profile) (5)

8 to 240, step of 8

Acquisition time per profile (6)

Variable, minimum 1 ms
Doppler shift detection algorithm Time domain

Triggering

External signal (TTL 0-5 V, min 20 ns) or keyboard

Time delay between profiles

0 to 65 000 ms

Recording capacity

Up to the remote computer hard disk capacity

Configuration parameters saving

Unlimited number of configuration files can be saved
Measurement signals 5 'transducer' connectors (single channel model) or 20 'transducer' connectors (multiplexer model)
Interface signals 'Raw echo' (max 0,7 V) output, 'Pulse repetition frequency' output, 'Window start gate' output, 'Trigger' output, 'Remote' connector, 'Service' connector
Remote control interface Ethernet 100 Base-T (RJ-45 'Remote' connector)

Remote computer operating system

Windows 98 / SE / ME or Windows NT4 / 2000 / XP

Display

External display - according to the remote computer characteristics

Power supply

110/220 V, 50/60 Hz

Size of instrument casing

340 x 130 x 400 mm

Weight

9.3 kg
Operating conditions Temperature 0 - 40°C, storage -20 - 60°C
Relative humidity 30 - 80%, non-condensing

Transport packing

Sturdy flight-case (optional as a separate cost item)

(1) Increasing number of emitted cycles improves signal quality but decreases longitudinal resolution.
(2) The maximum pulse repetition frequency is limited by the maximum measurable depth, i.e. by time of flight of ultrasonic signal to a distant point and back to transducer.
(3) The least number of waves in a pulse is two. Longitudinal space resolution depends on ultrasonic frequency (wavelength) and also on agility of the transducer used. Met-Flow transducers are very agile and therefore converge to the theoretical resolution limit.
(4) For ultrasonic beam divergence values see the Transducers data sheet.
(5) When using high repetition rate (many emissions per profile), sliding averaging in time is achieved.
(6) Acquisition time depends on the ultrasound flight time to the maximum depth point and back, and on the repetition rate.