Installation manual

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Software setup | NSO-II Installation Manual
Echosounder software version
For external sounder modules, the software version is displayed under Sonar installation. To
upgrade Sonar software, see “Software Updates and Screen Calibration” on page 35
Water speed calibration (echosounder transducer)
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.
Select Auto correct to match water speed to ground speed (SOG).
Manual calculation. Increase this value above 100 % if the paddle wheel is under reading,
and decrease this value if it is overreading, e.g. if the average water speed reads 8.5 knots and
SOG records 10 knots 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: 50-100 %. Default is 100 %.
Water speed averaging (echosounder transducer)
Averages water speed by measuring your speed at a selected interval of time. Water speed
intervals range from one to thirty seconds, e.g. if you select fi ve 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 (echosounder transducer)
Temperature calibration is used to adjust the water temperature value from the echosounder
transducer to match the data from another temperature sensor. It may be required to correct
for localised infl uences to the measured temperature.
Calibration range: -9.9° - +9.9°. Default is 0°.
¼ Note: Water temperature calibration only appears if the transducer is temperature capable.
Check transducer type selection if this option should be available.
T r ansducer type
Transducer type is used for selecting the transducer model connected to the echosounder
module. In some transducers with built-in temperature sensors, the temperature reading may
be inaccurate if the wrong transducer is selected from the transducer type menu.
NSO-II_IM_EN_988-10392-001.indd 18 9/07/2013 3:54:18 p.m.