The fixture is immersed in a liquid couplant
, generally water, mixed with a rust inhibitor.
His approach is based on the theory that the "optimum couplant
concentration defines optimum dispersion and the most efficient packing of particles.
Nous avons construit notre etude en couplant
, pour citer celles utilisees ici, des donnees d'entretiens semi-directifs (44) et des dialogues extraits de forums Internet (2775 tours de paroles traitant d'odeurs) concernant l'espace domestique, le corps et la cuisine.
After extensive preliminary testing of various couplants
, a gel couplant
The probes operated continuously at 200[degrees]C without ultrasonic couplant
Moreover, in Rayleigh wave-based reciprocity calibration, the sensor is mainly submitted to a normal vibration velocity because the fluid couplant
strongly attenuates the in-plane component of the vibration .
Relative attenuation of the ultrasonic signal through the thickness (center web) was measured using 500 kHz transducers and a high-temperature couplant
as the specimen cooled from 121[degrees]C to room temperature.
The gauge is supplied as a complete kit including the probe, couplant
and spare membranes in its own carry case and comes with a two-year warranty.
Zarka nous montre qu'en couplant
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A thin layer of transducer couplant
was applied to the tip of the delay line and aluminum platen surface prior to assembly of the test cell which was determined to be filled when contact with the aluminum was observed ultrasonically.
Currently a couplant
(a mixture of glycerin and water) must be added to the bolt head to facilitate the transmission of sound waves through the head.
Unlike UT and eddy current testing, MIB "sees" through fly ash and other wall build-up and so requires no pre-cleaning of the water wall, such as sandblasting; it also requires no couplant
EMAT UT is well-suited for use with robotic tools because no couplant
or liquid product is required to be present in the line in order to conduct inspections.
In order to have a good signal path, silicone gel was used as the couplant
between the sensors and the tube surfaces.
Coupling to smooth surfaces is relatively easy, requiring only a small amount of liquid couplant
and slight finger pressure.