WHEN TO USE LESS SENSITIVITY:
SHALLOW READINGS
Use less sensitivity when your instrument displays a series of random,
shallow readings (3.5’, 2.9’, 4.1’) and the actual depth is greater.
How to Perform
When looking at the rear of the instrument, this adjustment is made in a
clockwise direction. (This control operates much like the volume control
on a radio. If you turn it all the way down, you cannot hear the music.
Turning it up too far makes the music blare and sound out of tune.)
Turning the sensitivity control too much can actually “squelch” out the
transmit pulses and the return echoes. This will result in a “0.0" reading
in the display window.
Note:
When making this adjustment, turn the control no more than
1/16th of a turn at a time. Then wait 3 to 4 seconds before
making the next adjustment turn.
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