Simrad TRANSDUCER - INSTALLATION GENERIC REV H Manuel d'installation Page 37

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Transducerinstallation
Transducercablesandconduit
25cablesarrangedinthreegroupsareusedtoconnecttheMS70transducerarrayto
the19”rackwiththetransceivercircuitry.
Figure11Designingthe
cableconduit
0
0
(CD016005A)
Min.800mm
ASteelconduit
BWatertightseal
CAllowthetransducercablestomovefreelyupand
down
DSecurethecableshere
ESteelconduit
Bydefault,eachcableis25meterslong.Thecablesare
cuttoteachindividualinstallation.
Thecablemustbeproperlysupportedbothinsideand
outsidetheretractablekeel.
Ontheinside,designasteelcableductfromthetopof
thekeeltojustabovethetransducer(A).Onthetopofthe
ducts,placeawatertightseal(B)whichalsosupportsthe
totalweightofthecables,bothinsideandoutsidethekeel.
Outsidetheretractablekeel,allowthecabletorun
smoothlyupanddown(C)whenthekeelislowered
andhoisted.Thetopoftheexternalcablerunmust
beproperlyandpermanentlysecured(D),andtheseal
mustbeabletotaketheentireweightofthecables.It
isalsoimportanttoensurethatthecableruncanmove
undisturbedupanddownoutsidethekeel.Theremustbe
noobstructionstopreventthecablesfrommovingfreely!
Asecondsteelconduit(E)isusedbetweentheexternal
cablesupportandtheelectronicequipmentinthesonar
room.
Designofcableconduit
Thecableconduitmustbedesignedtoteachindividualshipandretractablekeel.The
qualityofthematerialsused,aswellasthequalityoftheworkmanshipmustbedened
bythevesselownerandtheinstallationshipyard.
Ifawatertightsealingisused,thedesignandqualityofthissealingmustbeapprovedby
thevessel’sclassicationsociety.
331549/B
35
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