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zone” of the ray. “Dead zones” of the beam can be rather big if you are on the slopes and the
shoulders.
“Zoom” mode operates more effectively in winter, when the sensor is immovable and the
“winter” operation mode is selected. In summer, especially when moving it also allows to
see many details, however constant depth change of the bottom complicates analysis of the
receiving information.
In rubber and steel boats (without double bottom) the device can be used directly through
the boat bottom. For this purpose it is necessary to pour some water into the boat (for
creating reliable acoustic contact) and press the sensor to the bottom.
On the first ice when it is uniform and without any air bubbles and snow imbedded in ice,
depth change is possible through the ice, with this it is required to provide reliable acoustic
contact between the sensor and the ice (pour some water on the ice).
When plunging the sensor deeply under the water (for about a meter and more) signal
registration is possible that are reflected from the water surface and not form the ice.
It is better to re-charge the battery at home in a warm place so that the frosty or moist air
that creates condensate generation, does not get inside the battery compartment. It will not
affect the device operation, but accelerated discharge of the battery. In winter silicone
lubricant between the sealing ring and the body of the battery compartment would not be
out of place.
When durable staying in frost (-15,–20 °С and below) the sonar screen may “brake” or not
provide very contrast image. In this case the device should be warmed up, e.g. put it under
the clothes for some time.
Bottom soil density reflected in relative units under the depth figures provides additional
data regarding the bottom and the near bottom structures. If these readings change all the
time there is non-uniform bottom surface with well-developed near bottom structures under
Summary of Contents for Praktik 6 Pro 2
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