Checkline DFX-7 - Manual (Page 84)

Dakota Ultrasonics
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4) Finally, press the MEAS key to return to the measurement screen and begin
taking readings.
10.8 Graphics Options (look & feel)
The DFX-7 includes a couple of cosmetic features for user preference when viewing
the waveform. These features only serve as cosmetic items, and do not change the
functionality of the DFX-7 in any way.
RECT Wave:
The rectified wave feature, is only functional when using RECT wave view, and
provides the user the following display options:
Outline – Draws the unfilled outline of the waveform.
Filled – Draws a filled version of the waveform.