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Transducer Technology
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OVERVIEW
Broadband TransducersWide beam TransducersTilted Element TransducersTransducer performance photosNMEA 2000 ProductsTransducer Installation & Troubleshooting
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Transducer Specifications
Power Q
Quality Factor
TVR(dB) RVR(dB) FOM
B744V 600W 28 @50kHz31 @200kHz
155@50kHz164@200kHz
-174@50kHz-184@200kHz
-31@50kHz-21@200kHz
B260 1kW 8 @50kHz8 @200kHz
162@50kHz175@200kHz
-173@50kHz-183@200kHz
-14@50kHz-10@200kHz
R199 2kW 3 @50kHz2 @200kHz
167@50kHz177@200kHz
-174@50kHz-182@200kHz
-9@50kHz-6@200kHz
R209 2-3kW
2 @50kHz2 @200kHz
171@50kHz172@200kHz
-177@50kHz-184@200kHz
-7@50kHz-12@200kHz
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Non-Broadband 200kHz-Matching layer B260
Q=8 Impedance 377
Non-Broadband 200kHz-NO Matching layer B260Q=26 Impedance 132
200kHz Ceramic Performance
Overlay
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Broadband B260Q= 8 Impedance 90 Overlay
Non-Broadband 200kHz-NO Matching layer B260Q=26 Impedance 132
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Echo Waveforms
Transducer: P319Frequency: 200 kHzQ=31 Cycles: 35
Transducer: B260Frequency: 200 kHzQ=8 Cycles: 10
Transducer: R99Frequency: 200 kHzQ=2 Cycles: 10
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Fish 6 above blendsinto bottom echo by
long ring from high Q
Fish 6 above blendsinto bottom echo by
long ring from high Q
Shows fish as blobs Fish less than 6 above bottom will blend in
Individual fish are detectedFish are detected 1 above the bottom
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4-10
-8
-6
-4
-2
0
2
4
6
8
10
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
-10
-8
-6
-4
-2
0
2
4
6
8
10
time, milliseconds
Broadband vs. No Broadband
Fish 1 above thebottom is still
detected by shor tring from low Q
Fish 1 above thebottom is still
detected by shortring from low Q
Individual fishblend together Individual fishblend together Individual fishare separated
Individual fishare separated
Short Ring- Low Q Long ring- High Q
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Compare depth measurement performance:
- changes in input power- change transducer (use different FOMs)
- active sonar equation predicts the trend
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0 200 400 600 800 1000 1200 1400 1600Depth, m
50 kHz B260 transducer, Received Voltage vs Bottom range
+6 dB +3 dB 0 dB, B260 1kW -3 dB -6 dB -9 dB-12 dB-15 dB-18 dB-21 dB
5 Vrms (-106 dBV) det. thresh.
808 m
Signal too weak
( 4 dB dashed line ) R e
l a t i v e
l e v e
l , d B
10
30
50
70
90
4
Must be above this line toobtain a good measurement
R99, R209
B260
B258, SS270W
B164
B744V, B60
50kHz Range Data
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0 100 200 300 400 500 600 700 800Depth, m
200 kHz B260 transducer, Received Voltage vs Bottom range
+6 dB +3 dB 0 dB, B260 1kW -3 dB -6 dB -9 dB-12 dB-15 dB-18 dB-21 dB
5 Vrms (-106 dBV) det. thresh.
Signal too weak
200kHz Range Data
407 m
R e
l a t i v e
l e v e
l , d B
10
0
20
30
40
50
60
70
80
90
4Must be above this line toobtain a good measurement
R99R209
B164
B744V, B60
SS270W
B258
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Broadband = Less voltage needed to drive transducer
B260 Non-Broadband:
(1000 RMS Watts x 8 x 300 ) = 1,549 Volts
B260 broadband:
(1000 RMS Watts x 8 x 90 ) = 849 Volts
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Individual fish
below & alongside baitfish
Individual fish
below & alongside baitfish
Individual fishholding tight
to bottom
Individual fishholding tight
to bottom
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Broadband Transducer
Non-Broadband Transducer
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Low ring=
Excellent Shallow-water operation
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SS270WTwin 25 beams @ 50 and 200kHz
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User Benefits Excellent at detecting mid to shallow water fish(bait, tuna, marlin etc.)
Split screen 50/200kHz fishfinder display ismore intuitive for novice users
Same targets appear in both beams Advanced users can identify fish species
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SS270W-Same bottom imaging @ both frequencies
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Wide vs. narrow beam-
Ping pong ballsSS270W SS270WB260 B260
50kHz 200kHz
SS270W B260 SS270W
200kHz
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SS270W @ 35 MPH
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Frequency agility allows the user to adjust thefrequency if the connected echosounder is"tunable".
No loss of sensitivity across the frequency range Adjusting the frequency will change the beam
width and depth capabilities. Certain fish are more detectable at specificfrequencies so the fishfinder & transducer can betuned to get the best echo return for the species
being targeted (tuna, marlin, ground fish, bait).
Benefits of Tunable Fishfinders withBroadband Transducers
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Broadband R209 / R299Q=2
Broadband B260Q=8 Overlay
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R209 External Mount / R299 In-Hull
Broadband on both low and high frequencies. 24 low-frequency ceramics that can operate anywhere
between 33kHz to 60kHz and can handle up to 3 kW of
input power. High-frequency 3.5" single-ceramic can operate between
130kHz to 210 kHz and can handle up to 2 kW of inputpower.
R309 and R399 units operate between 25kHz to 45kHz and130kHz to 210 kHz.
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Broadband and the future: CHIRP
Improved signal-to-noise ratio
Very good performance from shallow to deepBetter target definitionBetter performance at speedVariable beamwidthsBetter rejection of noise sources
-Frequency Modulated Transmissions
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B164 1 kW Tilted Element Engineered for Center console
and sport fishing boats
50/200kHz :constructed of threedual frequency elements. Low-profile design leaves no
protrusion below the hull No High Performance fairing
required
Built-in temp sensor
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SS270W Wide BeamTilted Element Pair
SS270W split up into 2 transducers Same ceramics and performance as the SS270W Separate transducers for 50 kHz and 200 kHz Top of the line 1kW tilted element Engineered for Center console and trailered boats Transducers can be sold separately No High Performance Fairing needed Built-in temp sensor
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SS270W TiltedElement Pair
Wiring
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200kHz Wide / Narrowbeam Switch box
Allows SS270W 200kHz to workwith existing B260 / M260installations.
User now has a switchable200kHz wide or narrow beamfor the specific type of fishing.
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SS260 Narrow BeamTilted Element Pair
B260 split up into 2 transducers Same ceramics and performance as the B260 Separate transducers for 50 kHz and 200 kHz Top of the line 1kW tilted element Engineered for Center console and trailered boats Transducers can be sold separately No High Performance Fairing needed Built-in temp sensor
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Transducer performance photos
600W B744V 1kW B164 1kW B258
1kW B260 1kW M260
Garmin GSD22 Raymarine DSM300 Furuno FCV585
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R199 In-Hull Signal Loss
50kHz
No Fiberglass
Q = 3
50kHz
inch Fiberglass
Q = 4.1
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200kHz
No Fiberglass
Q = 2
R199 In-Hull Signal Loss
200kHz
inch Fiberglass
Q = 4.5
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NMEA 0183 and 2000 Smart Transducers
All processing is done inside the transducer Operates at 235kHz No interference with on-board sounder Perfect for displaying digital depth/speed/temperature
DT800- Retractable Tilted Element Thru-Hull Depth / Temperature DST800- Retractable Thru-Hull Depth / Speed /Temperature P39- Transom Mount Depth / Speed /Temperature P79- In-Hull Depth only
T42- High performance Temperature
Installation & Troubleshooting
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Installation & Troubleshooting
Basics: Mounting Location
The water flowing across the hull must be smooth with aminimum of bubbles and turbulence (especially at high speeds).DO NOT MOUNT near water intake or dischargeopenings or behind strakes, fittings, or hull irregularities. The transducer must be continuously immersed in water. The transducer beam must be unobstructed by the keel or propellershaft(s). Choose a location away from interference caused by power andradiation sources such as: the propeller(s) and shaft(s), othermachinery, other echosounders, and other cables. The lower the noise
level, the higher the echosounder gain setting that can be used. Choose a location with a minimum deadrise angle. Choose an accessible spot inside the vessel with adequate headroomfor the height of the housing, tightening the nuts, and removing theinsert.
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Thru-hull location selection
Transducer placementTransducer placement
should be aft andshould be aft andclose to theclose to thecenterline. It needs tocenterline. It needs to
be located lowbe located lowenough that theenough that thetransducer is in thetransducer is in thewater at all times.water at all times.
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Thru-Hull Mounting Location
Consider itemsConsider items
such as the liftingsuch as the liftingstrap placementstrap placement ininthe location asthe location as
well as trailerwell as trailerbunks and rollersbunks and rollersif it is a traileredif it is a traileredvessel.vessel.
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Thru-hull location selection
Be sure that theBe sure that thetransducer signal willtransducer signal willnot intersect the propnot intersect the propshaft(s), keel or anyshaft(s), keel or anyother hull projections,other hull projections,
and that it is notand that it is notdirectly indirectly in -- line with theline with theprop(s).prop(s).
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Thru hulls can beThru hulls can beused on steppedused on steppedhull vessels, buthull vessels, butthey must bethey must be
located ahead of thelocated ahead of thetrailing edge of thetrailing edge of thefirst step and low tofirst step and low tothe keel to operatethe keel to operate
well.well.BOWBOW
Thru-hull location on stepped hulls
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M260 and R199 In-Hull Tanks
Now shipped with flat 90 tank bottom which can beeasily cut for bow-stern or port-starboard mounting.
To fill the new tank, we recommend using non-toxicpropylene glycol (RV / Marine anti-freeze).
To mount the tank to the hull, we recommend usingfiberglass resin, Marine Tex or Fusor 100EZ / T10.
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As with thruAs with thru -- hulls,hulls,The selectedThe selectedlocation should belocation should beaft and close toaft and close tothe centerline sothe centerline so
that the hull belowthat the hull belowthe transducer isthe transducer isin the water at allin the water at all
times.times.
In-hull location selection
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Testing for depth function
Using an EDI transducerUsing an EDI transducer
test box you cantest box you candetermine the resonantdetermine the resonantfrequency of afrequency of atransducer and confirmtransducer and confirmthat it is operatingthat it is operatingproperlyproperly
Black lead from transducerBlack lead from transducertester attaches to blacktester attaches to blackAirmar wire(Airmar wire( -- depth)depth)
Red lead from transducerRed lead from transducertester attaches to bluetester attaches to blue
Airmar wire(+depth)Airmar wire(+depth)
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Testing for Temperature Red lead from ohm meterRed lead from ohm meterattaches to brown Airmarattaches to brown Airmarwire.wire.
Black lead from ohmBlack lead from ohmmeter attaches to whitemeter attaches to whiteAirmar wire.Airmar wire.
With meter set to OHMS theWith meter set to OHMS the
reading should be in thereading should be in the10,000 ohm range at 7710,000 ohm range at 77degrees F.degrees F.The resistance increases asThe resistance increases asthe temp decreases.the temp decreases.The sensor will readThe sensor will readcorrectly in or out of water.correctly in or out of water.
Testing for Speed
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Testing for Speed
Apply Negative batteryvoltage to Airmar barewire and attach black
lead from volt meterApply positiveBattery voltage toAirmar red wire
Attach red leadfrom volt meter toAirmar green wire
Turn the paddlewheel slowly by hand. The voltmeter should toggle between zero volts and the
input voltage with each quarter turn of rotation.
Id tif i I t f
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Identifying Interference
If the screen interference increasesproportional to vessel speed thisusually indicates that the transducerface is exposed to aerated water
If the interference appears at a specificrpm this could be a sign of electricalinterference on the sounders powerline. Try powering the sounder directlyfrom a stand-alone battery.
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Identifying flow noise
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y g
Perform a slow but constant turn tothe side of the hull that the transom
transducer is mounted. Graduallyincrease rate of turn. If screen imageimproves the transducer needs to be
mounted lower in the water. If screen image is worse when turning
to the same side as the transducer tryturning the opposite direction. Thiswould indicate the transducer needs to
be mounted higher in the water.
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Questions?