Simrad S2009, User Manual

Page: 39 / 54

Installation
Use the installation option in the
Echo settings
dialog to setup the echosounder.
Keel offset
All transducers measure water depth from the transducer to the bottom. As a result, water
depth readings do not account for the distance from the transducer to the lowest point of
the boat (for example; bottom of the keel, rudder, or propeller) in the water or from the
transducer to the water surface.
Set the keel offset to the distance from the bottom of the transducer to the lowest point of
the boat in the water. If, for example, the distance is 0.3 m (1 ft), it will be input as (minus) -
0.3 m (-1 ft).
Water speed calibration
Water speed calibration is used to adjust the speed value from the paddle wheel to match
the actual boat speed through the water. Actual speed can be determined from GPS speed
over ground (SOG) or by timing the boat over a known distance. Water speed calibration
should be performed in calm conditions, with minimal wind and current movement.
Increase this value above 100 % if the paddle wheel is under reading, and decrease this value
if it is over reading. For example, if the average water speed reads 8.5 knots (9.8 MPH) and
SOG records 10 knots (11.5 MPH) the calibration value needs to be increased to 117 %. To
calculate the adjustment, divide the SOG by the paddlewheel speed, and multiply the
product by 100.
Calibration range: 50-200 %. Default is 100 %.
Water speed averaging
Averages water speed by measuring your speed at a selected interval of time. Water speed
intervals range from one to thirty seconds. For example if you select five seconds, your
displayed water speed will be based on averaging over 5 seconds of sampling.
Calibration range: 1-30 seconds. Default is 1 second.
Water temperature calibration
Temperature calibration is used to adjust the water temperature value from the sonar
transducer to match the data from another temperature sensor. It may be required to correct
for localized influences to the measured temperature.
Calibration range: -9.9° - +9.9°. Default is 0°.
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Note:
Water temperature calibration only appears if the transducer is temperature
capable. Check transducer type selection if this option should be available.
Software Setup | S2009-2016 Fish Finder User Manual
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