Checkline DFX-7 - Manual (Page 112)

Dakota Ultrasonics
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3) Use the UP and DOWN arrow keys to scroll through the sub menu items
until COATING 2PT is highlighted.
4) Press the ENTER key to display the Digits Edit Box.
5) Press the UP and DOWN arrow keys to scroll the highlighted value.
6) Press the LEFT and RIGHT arrow keys to scroll the digit locations.
7) Repeat steps 5 & 6 until the known thickness value is correctly displayed.
8) Press the OK key to calculate the velocity and return to the menu screen, or
ESC to cancel the coating one point calibration.
9) Finally, press the MEAS key to return to the measurement screen and begin
taking readings.
Note: CHECK YOUR CALIBRATION! Place the transducer back on both
calibration points. The coating thickness readings should now match the known
thickness values of each sample. If the thickness is not correct, repeat the
steps above.