Checkline DFX-7 - Manual (Page 74)

Dakota Ultrasonics
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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 TCG
curve is now set.
8) Optionally, the TCG curve can be displayed by pressing the UP and DOWN
arrow keys until CURVE is highlighted, followed by pressing the LEFT and
RIGHT arrow keys toggle ON.
9) Press the MEAS key to display the main measurement screen, and the TCG
curve will be displayed.