Instruction manual

Introduction
INTRODUCTION
Efcientsherywithtrawlandpurseseineassumesprofessional
andadequateinstrumentationonthegear.Simradhasprovided
professionalinstrumentsforshndingformorethansixtyyears.
Thisusermanualdescribesinstallation,useandmaintenanceof
theSimradPISeineSounderwhenputtousewiththePIcatch
monitoringsystems.
Note
TheSimradPI32andtheSimradPI44andPI54systemswith
softwareversion0.40willonlyacceptPISeineSoundersensors
withdepthrangelimitedto300meters.Touse600or1000m
depthrange,youwillneedPI44/54withsoftwareversion0.47
(orlater).
Purposeandapplications
ThepurposeofthePISeineSounderistoachieveaccurate
measurementsofboththewaterdepthandtheheightabovethe
seabedwithasinglesensor.ThePISeineSounderthuscontains
bothapressuresensortomeasurethewaterdepth,andanecho
sounderwithtwotransducerstomeasuretheheightabovethe
seabed.Theresultsfromthesemeasurementsaretransmitted
byacousticsignalstothePIcatchmonitoringsystemmounted
onthevessel.
ThePISeineSounderhasbeendevelopedtobeusedonboth
bottomandpelagictrawlsandonpurseandDanishseiners.The
sensormustbeinstalledintwodifferentwaysdependingonthe
application:
•Trawl:Horizontallybehindtheheadrope
•Seine:V erticallybelowthefootrope
Inordertomakepossiblethesetwoapplicationsandmounting
methods,theechosounderinsidethesensorhasbeenequipped
withtwotransducers.Bymeansofa“sensorkey”youcaneasily
denewhichtransducertouse.
Providedwiththesensorisa“giftbox”withtwosensorkeys.
Thesearetwospecialbolts,andbymeansofmagnetisminside
thebolts,thesewillselectwhichechosoundertransducertouse.
Theboltswillalsoactaswaterdetectors,andthatmeansthat
theywillslowlydisintegrate.Whenyoumountthesensorona
trawlorapurseseine,itisthereforeimportantthatyouusethe
correctkey:
•Trawl:Usethes
h o r t bolt
•Purseseine:Usethel
o n g bolt
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