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Velocity measurement
Sometimes the sound velocity of a material is not known. In this case a
sample with a known thickness can be used to determine the sound
velocity. It would be very handy to carry a set of mechanical calipers to use
in conjunction with the DC‐5000 in the field.
The following steps outline how to enable and set up this feature:
1) Physically measure an exact sample of the material or a location directly
On the material to be measured using a set of calipers or a digital
micrometer.
2) Apply a drop of couplant on the transducer and place the transducer in
steady contact with the sample or actual test material.
3) The display should show a thickness reading(probably incorrect).
4) Having achieved a stable reading, remove the transducer. (If the
Displayed thickness changes from the value shown while the transducer
Was coupled, repeat step 3.)
5) Press the
scroll through the sub menu items until Velocity Measurement is
highlighted. Press the
6) Press the
key to adjust the displayed velocity up or down, until the thickness value
displayed matches the thickness of the sample piece. And now the
displaying sound velocity value is accurate.
7) Press the
8) Press the
key to confirm.
9) Press the
measurements.
key to illuminate SET, Use
key to confirm.
or
key to move the cursor, press the
key to confirm and store it into Velocity Storage,
or
key to Illuminate the target place, Press the
key to exit setting and DC‐5000 is now ready to perform
‐ 18 ‐
keys to
or
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