Dakota Ultrasonics VX User Manual

Page 16

Dakota Ultrasonics

Probe Zero

Setting the Zero Point of the VX 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 VX is "zeroed", this fixed error

value is measured and automatically corrected for in all subsequent

measurements. The VX may be "zeroed" by performing the following

procedure:

Performing a Probe-Zero

1) Make sure the VX is on.

2) Plug the transducer into the VX. 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 top of the VX, above the display, 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 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 VX will display "Prb0" while it is

calculating its zero point.

6) Remove the transducer from the probe-disc.