Among all the applications of industrial ultrasonic testing, flaw detection is the oldest and the most common. Since the 1940s, the laws of physics hat govern the propagation of sound waves through solid materials have been used to detect hidden cracks, voids, porosity, and other internal discontinuities in metals, composites, plastics, and ceramics. High frequency sound waves reflect from flaws in predictable ways, producing distinctive echo patterns that can be displayed and recorded by portable instruments. Ultrasonic testing is completely nondestructive and safe, and it is a well established test method in many basic manufacturing, process, and service industries, especially in applications involving welds and structural metals. Alarm gates are often employed to monitor signal levels at selected points in the wave train to flag echoes from flaws. The high speed, fully sunlight readable, backlit display offers a full Quarter VGA resolution.Modern ultrasonic flaw detectors such as the NDT Epoch series are small, portable, microprocessor-based instruments suitable for both shop and field use. They generate and display an ultrasonic waveform that is interpreted by a operator, often with the aid of analysis software, to locate and categorize flaws in test pieces. They will typically include an ultrasonic receiver, hardware and software for signal capture and analysis, a waveform display, and a data logging module. While some analog-based flaw detectors are still manufactured, most contemporary instruments use digital signal processing for improved stability and precision.
Pulse velocity consists of measuring the time of travel of an ultrasonic pulse passing through the concrete being tested. Comparatively higher velocity is obtained when concrete quality is good in terms of density, uniformity, homogeneity etc.Ultrasonic Pulse Velocity (UPV) testing of concrete is based on the pulse velocity method to provide information on the uniformity of concrete.Ultrasonic pulse velocity is used to evaluate many conditions in concrete structures such as cracking, voids etc.The Ultrasonic Pulse Velocity (UPV) systems are designed to identify and map voids, honeycomb, cracks and other damage in concrete, wood, masonry, stone, ceramics, and metal materials. UPV tests are also performed to predict strength of early age concrete. The pulse velocity in a material depends on its density and its elastic properties which in turn are related to the quality and the compressive strength of the concrete. The UPV methodology relies on direct arrival of compressional waves, which are generated by sources with resonant frequencies ranging from 50 to 150 kHz. Pulse velocity=(Path length/Travel time)
Supplied complete with Ultracon-170 main body, Carrying
Pouch, Battery Charger, A pair of 52 kHz UT Transducer, RG 58 cable with BNC/BNC connectors, Reference Block, Ultrasonic couplant, Instruction manual.
1. Direct read-out of transit time of ultrasonic in concrete with ultrasonic transducers, which is pulsed by high voltage
2. With the combinations of high-energy pulser, high sensitivity receiver and high efficiency transducers, it is excellent in thick and attenuative materials.
3. TFT color LCD and makes it easy to operate in worksite or laboratory.
4. Status messages and different color display according to measurement modes enables to ascertain present inspection modes.
5. 6 x AA rechargeable batteries enables long operation.
6. Displays the transit time in 0.1µs unit
7. Conforms to BS1881 part 203
8. RF waveform can be observed through RF output connector to oscilloscope or A/D board
9. Rugged Aluminium case
10. Low Battery status display
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