Checkline DFX-7 - Manual (Page 61)

DFX-7 Ultrasonic Flaw Detector
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3) Press the UP and DOWN arrow keys to scroll the highlighted value.
4) Press the LEFT and RIGHT arrow keys to scroll the digit locations.
5) Repeat steps 3 & 4 until the height is correctly displayed.
6) Press the OK key to set the % SCRN HEIGHT and return to the menu
screen, or ESC to cancel entering the % SCRN HEIGHT.
Note: % Screen Height is an arbitrary level, and is not specified by the AWS
D1.1. The user should set a value that will optimize viewing defects that are
larger and smaller than the reference level. Typically this level is set between
50%-80% full screen height.
Setting the Reference Gain
1) Press the UP and DOWN arrow keys until SET REF HEIGHT is highlighted,
followed by pressing the LEFT and RIGHT arrow keys to toggle the feature
ON.
2) Press the MEAS key once to activate measure menu items. Press the
MEAS key multiple times to move right and the ESC key multiple times to
move left, until the GATE1 cell is highlighted.
Note: A gray cursor should be visible in the waveform area of the display.
Also, since the DFX-7 has been previous calibrated and the TRIG feature has
been setup, a gate should be enabled and active.
Peak Up on the Reflector
1) Apply couplant on the calibration standard, place the transducer in the
correct area in position with the reflector, and slide the transducer around to
locate the maximum amplitude.