Dakota Ultrasonics MINI--MAX - Manual (Page 138)

Dakota Ultrasonics
132
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.
12.4 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 length of the fastener itself.
Too little gain may result in detection on an undesirable section of the waveform.
It may also result in a “peak jump” to another part of the waveform later in time,
resulting in measurement errors. 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