Dakota Ultrasonics DFX-7 plus MANUAL1 - Manual (Page 70)

Dakota Ultrasonics
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6) 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 DAC menu is highlighted and displaying the submenu items.
7) Press the UP and DOWN arrow keys until DRAW is highlighted, followed by
pressing the LEFT and RIGHT arrow keys until OFF is displayed. The DAC
curves are now set and ready to be used for inspection.