Probe Zero - DAKOTA ULTRASONICS DX-1 Manual

Dakota Ultrasonics
Setting the Zero Point of the DX-1 is important for the same reason that
setting the zero on a mechanical micrometer is important. If the gauge is
not "zeroed" correctly, all of the measurements the gauge makes will be in
error by some fixed number. When the DX-1 is "zeroed", this fixed error
value is measured and automatically corrected for in all subsequent
measurements. The DX-1 may be "zeroed" by performing the following
procedure:
1) Turn the DX-1 on.
2) Plug the transducer into the DX-1. Make sure that the connectors
are fully engaged. Check that the wearface of the transducer is
clean and free of any debris.
3) On the face of the DX-1, below the keypad, is the metal probe-disc.
Apply a single droplet of ultrasonic couplant to the face of this disc.
4) Press the transducer against the probe-disc, making sure that the
transducer sits flat against the surface of the probe-disc. The
display should show some thickness value, and the Stability
Indicator should have nearly all its bars illuminated.
5) While the transducer is firmly coupled to the probe-disc, press the
PRB-0 key on the keypad. The DX-1 will display "Prb0" while it is
calculating its zero point.
6) Remove the transducer from the probe-disc.
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Probe Zero

Performing a Probe-Zero