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i70TransducerCalibration

Transducercalibration

Thetransducerslistedinthetablebelowcanbecalibratedusing

thei70multifunctioninstrumentdisplay.

TransducertypeConnection

Depthtransducers

connectedviaiTC-5orDepthpod

Speedandtemperature

transducers

connectedviaiTC-5orSpeedpod

Windtransducers

connectedviaiTC-5orWindpod

SmarttransducersconnecteddirectlytoSeaTalk

Fluxgatecompass

connectedviaiTC-5

RudderreferenceconnectedviaiTC-5

Depthcalibration

DepthOffset

Depthsaremeasuredfromthetransducertotheseabed,butyou

canapplyanoffsetvaluetothedepthdata,sothatthedisplayed

depthreadingrepresentsthedepthtotheseabedfromeither

thekeelorthewaterline.

Beforeattemptingtosetawaterlineorkeeloffset,ndout

theverticalseparationbetweenthetransducerandeitherthe

waterlineorthebottomofthekeelonyourvessel,asappropriate.

Thensettheappropriatedepthoffsetvalue.

D9343--2

1 2 3

Waterlineoffset

Transducer/Zerooffset

Keeloffset

Ifanoffsetisnotapplied,displayeddepthreadingsrepresentthe

distancefromthetransducertotheseabed.

Settingthedepthoffset

ThedepthcalibrationconsistsofsettingaDepthOffsetthatis

relevanttoyourdepthtransducer’sinstalledlocation.

Fromanyfavoritepage:

1.SelectMenu.

2.SelectSet-up.

3.SelectTransducersSet-up.

4.SelectContinue.

Theinstrumentdisplaywillsearchforanddisplayalistof

connecteddevices.(i.e.iTC-5,DSTortransducerpod)

5.Selectthedevicethatthetransducer(s)youarecalibrating

areconnectedto.

Alistofavailabletransducerdataisdisplayed,

6.*SelectDepth.

Note:*SteponlyapplicabletoiTC-5.

7.SelectDepthOffset.

8.SelectDepthFrom:.

Alistoftransduceroffsetsisdisplayed:

•Waterline

•Keel

•Transducer(default)

9.Selectthelocationthatyouwantdepthmeasurementstobe

takenfrom.

AfterselectiontheDepthOffsetpageisdisplayed.Ifyouhave

selectedWaterlineorKeelaDepthOffsetmustbeapplied.

10.SelectOffset:.

11.UsetheUpandDownbuttonstoadjusttheDepthOffsetto

therequiredvalue.

Theoffsetvalueshouldbethesameasthemeasured

distance:

•fromthetransducerfacetotheWaterline,or

•fromthetransducerfacetothebottomoftheKeel.

12.SelectSave.

SettinganincorrectDepthOffsetcouldleadtoyourvessel

runningaground.

Speedcalibration

Speedtransducercalibrationisrequiredastransducer

performanceisaffectedbyanumberofvariablessuch

astransducerlocation,shapeofthehullandwaterow

characteristics.ThepurposeofperformingSpeedcalibrationis

toensurethatthespeedreadingsattheinstrumentareatrue

indicationofthevessel’sactualspeed.

Inordertoachieveaccurateresults,speedcalibrationmustbe

carriedoutincalmconditionswithzerotideandzerocurrent.

Speedcalibrationalignstheinstrumentslogspeed(Speed

ThroughWater)to:

•SpeedOverGround(SOG),or

•areferencedspeed

CalibratingusingSOG

Formostinstallationsa1PointSpeedCalibrationisallthatis

required.

Ifthe1pointcalibrationdoesnotprovidesufcientlyaccurate

readingsoryourequireahigherlevelofprecisionforyourspeed

readingsthenaSpeedRunCalibrationcanbecarriedout.It

isadvisabletocarryouttheSpeedRunCalibrationatasmany

speedsaspossible.Thisisparticularlyimportantforplaning

vessels.

*Conventionalspeedtransducershaveamaximumof5

calibrationspeeds,andsmarttransducers(e.g.DST800)have

upto8.

Ifrequiredeachcalibrationpointcanalsohaveacalibrationfactor

appliedtofurtheralignthelogspeedreadingacrossdifferent

vesselspeeds.

Note:*TheSpeedRunCalibrationcannotbeperformedwhen

thetransducerisconnectedtoaSpeedPod.

CalibratingwithoutSOG

Formostinstallationsa1PointSpeedCalibrationisallthat

isrequired.Thecalibrationmustbeperformedusingaway

ofestimatingactualvesselspeedandadjustingthedisplayed

readingsothatthelogspeedmatchestheyourestimatedspeed.

Documentnumber:82328-1Date:07-2014

1 2 3 4 5 6 7 8

Sommario

Pagina 1 - Speedcalibration

i70TransducerCalibrationTransducercalibrationThetransducerslistedinthetablebelowcanbecalibratedusingthei70multifunctioninstrumentdisplay.Transducertyp

Pagina 2 - Nauticalmeasuredmilemarkers

IfyoudonothaveSOGdataavailablethentheSpeedRunCalibrationcannotbeperformed.Ifrequired,furthercalibrationpointscanbeaddedandacalibrationfactorcanbeappli

Pagina 3 - CalibrationTable

Measuringanauticalmile54D13149-13121.Startingpoint(startstopwatch)2.Measuredmile3.Endpoint(stopstopwatch)4.Firstpairofmarkers5.SecondpairofmarkersTopr

Pagina 4 - D13153-1

9.SelectViewcaltable.TheCalibrationT ableisdisplayed.D13153-11 21.SpeedtransducerconnectedviaiTC-5orspeedpod.2.SmartDSTtransducerconnecteddirectlytoSe

Pagina 5 - Windcalibration

7.SelectDonetoreturntotheCalibrationT able.8.Repeatsteps4to7forallCalibrationPointsthatrequireadjustment.9.SelectFinishwhenalloftherequiredCalibration

Pagina 6 - Aligningthewindtransducer

D12 06 7-110.SelectContinue.11.IfrequiredusetheUPandDOWNbuttonstomanuallyadjustthevaneoffset.12.PressSELECTtocompletethecalibrationprocessandsavethese

Pagina 7 - Rudderreferencecalibration

•T oapplyanoffsettoyourAWSreadingsanaccuratereferenceforAWSmustbeusedtocomparetheinstrument’sAWSreadingagainst.•Conditionsshouldbecalm(i.e.aslightsea)

Pagina 8 - Compasscalibration

4.SelectAdjustRudderAngle.5.UsetheUpandDownbuttonstoadjustthepointersothatthepointerandthereportedRudderAnglesarebothzero.6.SelectSave.InvertingtheRud

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