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Dakota Ultrasonics
12
If the Stability Indicator has fewer than five bars darkened, or the
numbers 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 against the material. If the condition persists, it
may be necessary to select a different transducer (size or frequency) for
the material being measured. See page 30 for information on transducer
selection.
While the transducer is in contact with the material that is being
measured, the MMX-6 DL will perform four measurements every second,
updating its display as it does so. When the transducer is removed from
the surface, the display will hold the last measurement made.
IMPORTANT
Occasionally, a small film of couplant will be drawn out between the
transducer and the surface as the transducer is removed. When this
happens, the MMX-6 DL may perform a measurement through this
couplant film, resulting in a measurement that is larger or smaller than it
should be. This phenomenon is obvious when one thickness value is
observed while the transducer is in place, and another value is observed
after the transducer is removed.
In addition, measurements through very thick paint or coatings may
result in the paint or coating being measured rather than the actual material
intended. The responsibility for proper use of the instrument, and
recognition of these types of phenomenon’s, rest solely with the user of the
instrument.