Checkline TI-25SX, Руководство по эксплуатации, Страница: 7 / 22

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2.9 The Transducer
The transducer is the “business end” of the TI-25SX. It transmits and receives ultrasonic
sound waves that the TI-25SX uses to calculate the thickness of the material being
measured. The transducer connects to the TI-25SX via the attached cable, and two
coaxial connectors. When using transducers manufactured by Checkline, the orientation
of the dual coaxial connectors is not critical: either plug may be fitted to either socket in
the TI-25SX.
The transducer must be used correctly in order for the TI-25SX to produce accurate,
reliable measurements. Below is a short description of the transducer, followed by
instructions for its use.
This is a bottom view of a typical transducer. The two semicircles of the wear face
are visible, as is the barrier separating them. One of the semicircles is responsible for
conducting ultrasonic sound into the material being measured, and the other semicircle
is responsible for conducting the echoed sound back into the transducer. When the
transducer is placed against the material being measured, it is the area directly beneath
the center of the wear face that is being measured.
This is a top view of a typical transducer. Press against the top with the thumb or index
finger to hold the transducer in place. Moderate pressure is sufficient, as it is only
necessary to keep the transducer stationary, and the wear face seated flat against the
surface of the material being measured.
Measuring
In order for the transducer to do its job, there must be no air gaps between the wear-
face and the surface of the material being measured. This is accomplished with the use
of a “coupling” fluid, commonly called “couplant”. This fluid serves to “couple”, or
transfer, the ultrasonic sound waves from the transducer, into the material, and back
again. Before attempting to make a measurement, a small amount of couplant should