Checkline DFX-7 - Manual (Page 94)

Dakota Ultrasonics
90
8) Once the desired PRF is displayed, press the MEAS key to return to the
measurement screen.
10.16 Damping
The DFX-7 has an adjustable damping feature, enabling the user to select from a
variety of settings according the transducer frequency and overall output. The range
of the damping feature is 50-1500 ohms. The available steps are 50, 75, 100, 300,
600 and 1500 ohms. Lower frequency transducers require less damping because
they typically have higher impedance and distort. The reverse is true for higher
frequency transducers. Nevertheless, trial and error with this feature will enable you
to find the optimal signal response and setting for your transducer. The procedure to
change the DAMPING is outlined below:
Selecting the Damping
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 PRB menu is highlighted and displaying the submenu items.
2) Use the UP and DOWN arrow keys to scroll through the sub menu items
until DAMPING is highlighted.
3) Use the LEFT and RIGHT arrow keys to scroll the DAMPING options.