Dakota Ultrasonics PVX User Manual
Page 59
PVX Precision Visual Thickness Gauge
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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 Delay number is correctly displayed.
8) Press the OK key to set the Delay and return to the menu screen, or ESC to
cancel entering the Delay.
9) Finally, press the MEAS key to return to the measurement screen and begin
taking readings.
7.4 Gain
The gain, or amplification of the return echoes, can be adjusted over a wide range.
The setting of the gain is crucial in order to obtain valid readings during the
measurement process. Too much gain may result in erroneous measurements, by
detecting on noise rather than the actual material back wall itself. Too little gain may
result in detection on an undesirable section of the waveform. It may also result in
lack of detection on internal flaws or other specific applications using pencil style
transducers. The gain can easily be compared to the volume control of a home
stereo system. If you turn it up too much, you can’t hear the music clearly. If it’s
turned down too much, you can’t hear it at all.
The procedures to adjust the Gain are outlined below:
Adjusting the Gain using the Hot Menus