Raymarine LIGHTHOUSE 4, Руководство по эксплуатации

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2. [Below transducer] — This is the default reading from the transducer
(zero offset applied).
3. [Below keel] — The depth reading will be decreased from the transducer’s
default reading.
Setting a depth offset
You can set the point depth readings are taken from.
1. Open the [Fishfinder app] .
2. Open the [Transducer] settings menu: [Menu > Settings Transducer] .
3. If you have more than 1 sonar transducer installed, then you will need
to select the relevant transducer.
4. Select either [Below keel] , [Below waterline] , or [Below transducer] as
required.
i.
If you have selected [Below keel] enter your transducer’s distance
above the lowest point of your keel in the offset field.
ii. If you have selected [Below waterline] enter your transducer’s distance
below the waterline in the offset field.
Setting a temperature offset
If your sonar transducer includes a temperature sensor then you can check
and calibrate your temperature reading.
1. Open the [Fishfinder app] .
2. Open the [Transducer] settings menu: [Menu > Settings Transducer] .
3. If you have more than 1 sonar transducer installed, then you will need
to select the relevant transducer.
4. If required, select the [Enable temperature sensor] toggle switch to
enable the sensor..
5. Measure the actual water temperature using a thermometer.
6. Check your reading against the displayed
[Current temperature ] .
7. If the readings are not the same, select [Calibrate temp] and enter the
difference between your 2 readings.
RealVision™ AHRS calibration
RealVision™ 3D and RealVision™ 3D Max transducers include a built-in AHRS
(Attitude and Heading Reference Sensor), which measures the motion of
your vessel to assist in the rendering of sonar images. After installation all
RealVision™ transducers require calibration.
An uncalibrated transducer can produce an offset to the front edge of the
render of the bottom in the sonar image, as illustrated below.
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