Simrad ST90 - Page 36

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Neithertoolsnorinstrumentsarerequired.
Caution
YoumustneversettheST90to"ping"unlessthetransducerissubmergedinwater.
Thetransducermaybedamagedifittransmitsinopenair.
Forthebestpossibleconditions,theshipmustbe"silent".
•Thewatermustbeasdeepaspossible.
•Theremustbenoothervesselsinthevicinity.
•Thevesselmustliestillinthewater.
•Asmuchmachineryaspossiblemustbeturnedoff.Itisparticularlyimportantto
turnoffelectricalmotors,aswellascoolingsystemsandhydraulicpumpsthatmay
causeelectricnoise.
•Topreventinterference,allotherhydroacousticinstrumentsmustbeturnedoff.
Context
BymeansoftheBITE(Built-InTestEquipment)functionality,youcaneasilydetermine
iftheST90hardwareisoperational.Andmostimportant,youcanmakesurethatallthe
transceiverschannelsandthetransducerelementsarefunctional.Toopenthedifferent
pagesintheBITE(Built-InTestEquipment)dialogbox,usethelarge"buttons"onthe
lefthandside.Eachbuttonprovidesasmallcolourcodedindicator.
•Noindicator:StatusisOK.Noactionsarenecessary.
•Yellow:Thisisawarning.Acloserinvestigationisrecommended.
•Red:Thisisanalarm.Acloserinvestigationisrequired.
•Blue:AdevicemonitoredbytheBITEsystemisdisabled.
•Grey:Noinformationisavailable.
TheBITE(Built-InTestEquipment)dialogboxandfunctionalityisonlyprovidedfor
performancemonitoring.ThefunctionalityisnotrequiredfornormaluseoftheST90.
TheBITEdialogboxdoesnotpermityoutochangeanyoperationalparameters.
Withthevesselinport,theenvironmentalconditionsarenotsatisfactory.Intheshallow
watersoftheport,noisefromothervessels,dockyardworkersormachinerywillcause
unreliabletestresults.Ifyoudothistestsinabusyharbour,orwithnoisesources
present,thesensitivereceiverswilldetectallthenoiseinthenearbywaters.Excessive
noiseorinterferencemaybemisinterpretedasphysicaldefects.
Note
IfyouareunabletodothistestduringtheHarbourAcceptanceTest,itmustberepeated
duringtheSeaAcceptanceTest.
SimradST90HarbourAcceptanceTest