Dakota Ultrasonics DFX-7 plus MANUAL2 - Manual (Page 114)

Dakota Ultrasonics
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4) Alternatively, 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 brightness number is correctly displayed.
8) Press the OK key to set the brightness and return to the menu screen, or
ESC to cancel entering the brightness.
9) Finally, press the MEAS key to return to the measurement screen and begin
taking readings.
10.2 Screen Update
The DFX-7 has a maximum screen refresh rate of 120Hz, or will update 120 times
per second. This option allows the user to switch between 60 & 120 Hz. The naked
eye can realistically only see 40Hz, however this feature will activate the
audible/visual alarm at the selected update rate. The procedures for selecting the
update rate are outlined below:
Selecting Screen Redraw Rate