Raymarine a68 WiFi - Page 198

4.SelectSpeedTransducer.
Alistoftransducersisdisplayed.
5.Selectyourspeedtransducerfromthelist.
Checkingthesonar
Sonarchecksaremadeusingtheshnder
application.
1.SelectashnderpagefromtheHomescreen.
2.Checktheshnderdisplay.
Withtheshnderactiveyoushouldsee:
•Depthreading(indicatesthetransduceris
working).Thedepthisshowninadataboxin
thebottomleftofthescreen.
Ifthedataboxisnotpresentitcanbeturned
onfromthePresentationmenu:Menu>
Presentation>DataboxesSet-up.
FishnderTransducerCalibration
Yourshndertransducermustbecalibrated
correctlytoachieveaccuratedepthreadings.
Themultifunctiondisplayreceivestheimagefrom
asonarmodulewhichprocessessonarsignals
fromatransducermountedinthewater.Ifthe
transducerisequippedwithaspeedpaddlewheel
andtemperature-sensingthermistor,thesonar
modulecalculatesspeedandtemperature.To
ensureaccuratereadings,itmaybenecessaryto
calibratethetransducer(s)byapplyingoffsetsto
depth,speedandtemperature.Asthesesettings
areheldinthesonarmoduleandrelatetothe
transducer,theyareappliedsystem-wide.
DepthOffset
Depthsaremeasuredfromthetransducertothesea
bed,butyoucanapplyanoffsetvaluetothedepth
data,sothatthedisplayeddepthreadingrepresents
thedepthtotheseabedfromeitherthekeelorthe
waterline.
Beforeattemptingtosetawaterlineorkeel
offset,ndouttheverticalseparationbetweenthe
transducerandeitherthewaterlineorthebottomof
thekeelonyourvessel,asappropriate.Thensetthe
appropriatedepthoffsetvalue.
D9343--2
1 2 3
1
Waterlineoffset
2
Transducer/Zerooffset
3
Keeloffset
Ifanoffsetisnotapplied,displayeddepthreadings
representthedistancefromthetransducertothe
seabed.
Settingthedepthoffset
Fromtheshnderapplication:
1.SelectMenu.
2.SelectSet-up.
3.SelectTransducerSet-up.
4.SelectDepthOffset.
Thedepthoffsetnumericadjustcontrolis
displayed.
5.Adjusttheoffsettotherequiredvalue.
Settingthespeedoffset
Fromtheshnderapplication:
1.SelectMenu.
2.SelectSet-up.
3.SelectTransducerSet-up.
4.SelectSpeedOffset.
Thespeedoffsetnumericadjustcontrolis
displayed.
5.Adjusttheoffsettotherequiredvalue.
SettingtheTemperatureoffset
1.SelectMenu.
2.SelectSet-up.
3.SelectTransducerSet-up.
4.SelectTemperatureOffset.
Thetemperatureoffsetnumericadjustcontrolis
displayed.
5.Adjusttheoffsettotherequiredvalue.
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LightHouseMFDoperationinstructions