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Dakota Ultrasonics
35) Press the
36) Press the
the desired storage location.
Note: The first column A must be used to store reference lengths.
37) Press the
location.
38) Abort the Grid View Box by pressing the
39) The zero calibration is complete and documented.
40) Finally, press the
new bolt group, and begin taking measurements.
8.5 Using a Standard Bolt
Using any fastener that provides a good ultrasonic echo with both ends ground and
polished can make a simple and effective calibration standard. The primary objective
is to verify a zero value prior to measuring to avoid measurement errors if the
MiniMax, transducer, or cable is replaced. While this sounds like an economic way
to go, the user must keep in mind that certified calibration standards are usually
inclusive of an ultrasonic length, velocity, and temperature coefficient that is certified
according to a specific set of standards. The following procedures outline how to use
a standard bolt as follows:
Now that a group has been created to store our probe zero data, the material type of
the standard zero/cal bolt must be selected. This will load the appropriate values for
velocity and the temperature coefficient into memory.
key to display the CAL DATA group.
arrow keys to scroll the target cell cursor to
key to save the current reading in the highlighted cell
key to return to the measurement screen, set up a
Selecting the Bolt Material Type
key at any time.
60
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