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5
OPERATION PROCEDURE
5.1
The thickness gauge is serviced by one operator. It is allowed to use the
thickness gauge only after the present operation manual has been carefully read.
5.2
Clean the surface, which comes in contact with the transducer, from flake
scale, protective coating, paint, metal plating or other coarse micro-irregularities by
mechanical scrubbing (using a wire brush, scraper, abrasive cloth strip or grinder).
5.3
Apply a layer of couplant to the surface of test object in the point of
placing a transducer. The normal consumption rate of couplant shall not exceed 1 g
per one measurement.
5.4
Switch the thickness gauge ON.
5.5
Prepare the thickness gauge for operation in accordance with Section 6.
5.6
Thickness measurement. Manual mode
For the manual thickness measurement (in one point), please perform the
following actions:
1)
Plug an appropriate transducer suitable for the selected type of
measurements into the thickness gauge.
2)
Switch the thickness gauge ON by pressing
3)
Carry out zero calibration in accordance with para 6.6 of this Manual.
4)
Set up the ultrasound velocity in a test object or perform the calibration of
the thickness gauge in accordance with para 6.8 of this Manual.
5)
Press the transducer against the test object prior wetted with couplant,
making sure that the transducer sits flat against the surface of the test object. The
Stability Indicator should have the maximum number of its vertical bars on, while the
measured thickness value will appear on the display.
The measured thickness value will stay on the display, even after the transducer
has been removed from the tested surface, until the next measurement is performed.
Note - If the Stability Indicator has less than a half of its vertical bars darkened,
or the readings on the display seem erratic, first check to make sure that there is an
adequate film of couplant beneath the transducer, and that the transducer is seated
flat and tightly against the tested surface. If the condition persists, it may be
necessary to select a different type of transducer (in size or frequency) for the
22
button.
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