Dakota Ultrasonics DFX-8 plus MANUAL2 - Manual (Page 131)

DFX-8
Ultrasonic Thickness Gauge
127
Note: Before toggling the Polarity, the DFX-8 should be set to the RF display
view option. The RF view will give the user the best opportunity to correctly
view the positive and negative cycles of the waveform. Please refer to page 64
for information on selecting the Display Views.
1) Press the MENU key once to activate the menu items tab. Press the MENU
key multiple times to tab right, and the ESC key multiple times to tab left,
until the TUNE menu is highlighted and displaying the submenu items.
Alternatively, press the LEFT and RIGHT arrow keys multiple times
using the left button wheel.
2) Use the UP and DOWN arrow keys multiple times using the left button
wheel to scroll through the sub menu items until POLARITY is highlighted.
3) Use the LEFT and RIGHT arrow keys multiple times on the right button
wheel to toggle the POLARITY negative or positive.
4) Press the MEAS key to return to the measurement screen and begin taking
readings.
Important: Be sure to do a Probe Zero after changing the polarity!
10.11 Pulse Width
The DFX-8 has an adjustable pulse width option. Pulse width, refers to the duration
of time the pulser is left on. This time results in increased energy sent into the test
material. There are three width options (SPIKE, THIN, and WIDE). The SPIKE
setting may be desirable for high resolution and general applications to decrease the
overall noise. This can be considered the normal or standard setting. When
additional energy is needed, more penetration, the THIN and WIDE options may be
necessary. The procedure to change the pulse width is outlined below:
Selecting the Pulse Width