Checkline DFX-7 - Manual (Page 30)

Dakota Ultrasonics
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3.2 Probe – Menu
ZERO PROBE: The DFX-7 is zeroed in much the same way that a mechanical
micrometer is zeroed. If the DFX-7 is not zeroed correctly, all of the measurements
made using the DFX-7 may be in error by some fixed value. The DFX-7 is equipped
with an optional automatic or manual zero feature. Refer to the section on page 48,
for an explanation of this important procedure.
ZERO COATING: In order to account for very slight electronic differences in
transducers of the same type, frequency, and diameter, the DFX-7 has been
equipped with a “zero coating” feature. This enables the DFX-7 to obtain very
accurate readings on coatings, eliminating potential errors incurred from slight
differences in the manufacturing processes. Refer to the section on page 48, for a
detailed explanation.
TYPE: Enables the user to select the type of transducer being used from a chart of
transducer types. This provides increased linearity between transducers. Refer to
page 44 for a further explanation.
FLAW MODE: Activates the flaw detection mode and view. This feature is for use
with single element angle beam transducers and used as a general prove-up flaw
inspection mode. Refer to page 120 for a further explanation.
3.3 CAL – Menu
MAT: Select the material velocity from a chart of basic material types when a known
sample thickness, or material velocity cannot be obtained. Refer to page 57 for
further info.
MATL 1PT: Performs a single point calibration. This option allows the user to
automatically calculate the velocity by entering a known sample thickness. Refer to
page 54 for further info.