Installation manual
SimradPI50
Sensorpresentationprocedures
Thissectionprovidestheprocedurestocalibratesensors,resettimers,applyltersand
setupspecialpresentations.
Topics
•Howtocalibratethedepthsensorsonpage92
•Howtoresetthesensorcounteronpage93
•Howtosmoothoutthebottomandcatchreadingsonpage93
•Howtosmoothoutthedatareceptiononpage94
•Howtoremovenoisefromthesensordataonpage95
•Howtosetupspreadanddepthsensorstomeasureverticalgeometryonpage95
•Howtosetupdepthandheightsensorstomeasuretotalwaterdepthonpage97
•Howtosetuptheheightsensortoshowthetrawlopeningonpage97
Howtocalibratethedepthsensors
Onlydepthsensorscanbecalibrated.Thepurposeistomakesurethatthedepthreported
bythesensorisasaccurateaspossible.Thisprocedureiscarriedoutonboardthevessel.
Note
Inordertocalibratethesensor,itmustbesubmergedinsaltwater .
Thesoftwareprovidedforcalibrationassumesthatthesensorisloweredto1meterdeep.
Ifyouneedtoloweritevendeeper,youwillneedtoaddthisadditionaldepthtothe
OffsetvaluewhenyouselectandsetupthesensorintheSelectSensorsdialog.
Example:Ifyouloweryoursensorto5metersdepthforcalibration,youmustenter
4(meters)intotheOffsetforthesensor.
1Mountaropetothetopfasteninglugsonthesensor.
2Tightentherope,andmeasureonemeterfromthebottomofthesensortoaspoton
therope.Placeavisualmarkerontheropeatthatlocation.
3Lowerthesensoroverthesideofthevesselandintothewater.Lowerituntilthe
visualmarkerontheropeisevenwiththesurface.
Youmaywishtouseadifferentdepthreferencethantheseasurface.Ifthisisthe
case,changethemarkingontheropetotyoupreference,forexamplethedepthof
thekeelorthedepthofanechosoundertransducer.
Itisalsopossibletoattachthesensor1meterunderaoatingdevice.Testthis
arrangementbeforeyouuse,andmakesurethatthepressuresensoronthedepth
sensorislocated1meterbelowtheseasurfacewhenloweredintothewater.
4Observethenumericalpresentationofthesensordepth,andallowthereadingto
stabilizeitself.
5ObservetheMainmenu.ItisnormallylocatedontherighthandsideofthePI50
presentation.
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