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Important – Dakota Ultrasonics VX User Manual

Page 14

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Dakota Ultrasonics

10

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 17 for information on transducer

selection.

While the transducer is in contact with the material being measured, the

VX 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 VX 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 value is observed while the transducer

is in contact with the material, and another value is observed after the

transducer is removed.