9 automatic echo optimization – Checkline TI-MINIMAX User Manual

Page 144

Dakota Ultrasonics

138

1) Press the

MEAS key once to activate measure menu items. Press the

MEAS key multiple times to move right and the ESC key multiple times

to move left, until the

WIDTH cell is highlighted.

2) Press the

UP, DOWN, LEFT, and RIGHT arrow keys to scroll the

highlighted value.

Alternatively , press the ENTER key to display the Digits Edit Box.

4) Press the

UP and DOWN arrow keys to scroll the highlighted value.

5) Press the

LEFT and RIGHT arrow keys to scroll the digit locations.

6) Repeat steps

4 & 5 until the WIDTH value is correctly displayed.

Press the

OK key to return to the measurement screen, or ESC to

cancel entering the

WIDTH.

12.9 Automatic echo optimization

The MINI-MAX is equipped with a built in Auto Set feature for echo optimization.
The

Auto Set uses a variety of algorithms, evaluating the positive and negative

and negative cycles, and selects the best phase (polarity) to use for
measurement. It also optimizes the gain, sets the delay and width, and activates
and sets the gate accordingly. Use of this feature will save the user a great deal
of time in the measurement process. In order to use the

Auto Set properly, an

approximate length of the bolt must be entered into the MINI-MAX. The
approximate length tells the MINI-MAX where to start looking for the echo. The
MINI-MAX will search +/- 5% from the value entered. The following procedures
outline the

Auto Set feature.