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Simrad NX40/45 Installatie- en bedieningshandleiding40
CAUTION
!
!
CAUTION
DANGER
WARNING
Bij het varen op hoge
snelheid ontstaan
er luchtbellen en
turbulent water
waarbij de transducer
wordt overspoeld. Het
ultrasone geluid dat
dan door de transducer
wordt opgevangen,
kan de echte echo’s
overheersen.
Frequentie en kegelbreedte
Waterdiepte
vt/m
Kegelbreedte bij 50
kHz
Kegelbreedte bij 200
kHz
Kegel van 45˚ Kegel van 11˚
Sterkte van echo’s
De kleuren geven de verschillen in de sterkte van de
echo aan. De sterkte is afhankelijk van verschillende
factoren:
Grootte van de vis, school vissen of andere
objecten.
Diepte van de vis of het object.
Locatie van de vis of het object. (Het gebied van het
ultrasone pulssignaal is ongeveer kegelvormig en de
echo’s zijn het sterkst in het midden.)
Helderheid van het water. Deeltjes of lucht in het
water verzwakken de sterkte van de echo.
Samenstelling of dichtheid van het object of de
bodem.
Soorten bodem
Modder-, wier- of zandbodems zorgen vaak dat het
pulssignaal van de dieptemeter wordt verzwakt en
verspreid, waardoor er een zwakkere echo ontstaat.
Harde, rotsachtige of koraalbodems reecteren het
pulssignaal zodat er een sterkere echo ontstaat.
40


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