I have a E7D MFD with radar and a P79 (thru hull) transducer. My boat is a Seahunt 234, less than one year old. MFD installed upon purchase. Shortly after we got the boat, I noticed the MFD was picking up a depth  reading intermittenly. Last few times I took the boat out, it displayed no readings. frustrating. We've had no fish finding capability. Yesterday, while I was washing the boat I noticed a reading. Is there something I should look at/for that may be causing a fault.  Thanks

Views: 638

Reply to This

Replies to This Discussion

Welcome to the Raymarine Technical Forum Bernie,

Please note that fishfinders are not designed to return a bottom image or depth value when the hull is out of the water.  Begin by checking the following two items:

  • verify that the transducer reservoir is filled as the transducer is designed to transmit energy through the hull via a fluid medium (typically RV antifreeze)
  • verify that the P79 transducer has been selected within the MFD's transducer configuration settings (HOME->FISHFINDER->MENU->SET-UP->TRANSDUCER SET-UP->TRANSDUCER)
  • verify that the transducer is pinging (an automobile diagnostic stethoscope may be helpful in listing to the transducer)

Transducer location is critical to maximizing the performance of the system.  It is also important to periodically check in-hull transducer reservoir fluid levels to ensure that they are full.  Also, when operating in depths greater than 180', the 50kHz frequency is recommended.

From a performance standpoint, properly installed thru-hull transducers will typically deliver the best performance.  The performance of in-hull transducers may be as much 20% lower than a thu-hull of similar transmitting element design.  As hull designs, materials, thickness, and other factors differ, performance of in-hull transducers will vary between boats.

In order to install an in-hull transducer, the following minimum hull requirements must be met:

  • the hull must be constructed of solid, non-cored fiberglass in the location where the transducer will be installed.
  • the hull must additionally be less than 1" thick in the location where the transducer will be installed
  • the hull must not feature hull aerating steps (if so, the transducer must be located forward of the step.  Owners must recognize that such an installation location may cause the section of the hull below the transducer to loose contact with the water when the hull lifts while operating at high speed)

Before bonding the transducer reservoir to the hull's inner surface, it us recommended that this location be tested first.  In choosing the transducer mounting location, it is recommended that baseline performance of the fishfinder/transducer be established with the transducer held over the side of the vessel while the vessel is stationary and in water having a depth of at least 30'.  Suspending the transducer in this manner can also be used to test to operation of the DSM.  A series of snapshots of the fishfinder's image should be taken as a baseline to then compared the performance of proposed transducer installation location(s) while trolling, while on plane, and at high speed.  One would then rest the transducer on a ZipLock bag which has been filled with water (purge all air) and temporarily placed on the inside of the hull in the area where the transducer performance will be tested.  Transducer site testing should be performed while the vessel stationary, trolling, and when on plane until the best transducer installation location is determined.  After testing has been completed and the best installation site determined, then the transducer reservoir may be fastened to the inside of the hull per the transducer installation instructions.

Reply to Discussion

RSS

Events

Videos

  • Add Videos
  • View All

Photos

Loading…
  • Add Photos
  • View All

Latest Activity

Richard H Wheeler liked jeff hesse's discussion S1000 autopilot
Dec 3
Paul Poswiatowski replied to Paul Poswiatowski's discussion I have a ST5000 auto pilot. It won't track more than 30 seconds.
"Back again.  The unit tracks ok for a couple minutes.  At high speed a little better, sometimes I can get 15 minutes out of it.  It will still do a crazy Ivan at times.  I believe I just have a defective unit.  I am scouring…"
Nov 30
Steven Osolin replied to Ed Y's discussion CP300 sonar not listed on Raymarine site?
"I'm in the same "boat" you are. I've been working on a project 1987 Pro-line 23 WA for a couple of years. Finally got it out last weekend. I've got a brand new C140W, CP300 and a B164 1kw transducer. The MFD does…"
Nov 23
Peter replied to John F Wong's discussion No data for 4" Open Array Super HD
"Hi, can't we just buy the IF PCB? I have the same problem. VCM100 going to sleep mode. network is working good."
Nov 22
Josh Pekar replied to Kevin Linder's discussion Cameras for e125
"I am also able to access other non-raymarine hardware through the MFD's WiFi by also assigning them within the same static IP range i.e. I can access my NVR.   Now you have a WiFi access point whenever your MFD is running.  Neat!"
Nov 17
Josh Pekar replied to Kevin Linder's discussion Cameras for e125
"Update on how to get 3rd party IP cameras to work with Raymarine settings that worked for me. 1. Must set static IP for camera in the range of 10.0.1.X** 2. Set Subnet of camera as 255.0.0.0, Gateway and DNS as 10.0.1.1 3. Disable ONVIF…"
Nov 16
Steve Battel updated their profile
Nov 16
John updated their profile
Nov 9
John replied to Al's discussion Wiring Install of Raymarine Fluxgate Compass Module
"Can I install the fluxgate and connect to a Seatalk/ng or Seatalk/1 network that I have already in place? Thank you"
Nov 9
Dave Hope replied to Dave Hope's discussion P/C backup for E80
"As you can see not been in touch for a while as all fixed and working well However now having some troubles getting laptop to connect to sea talk now Think it was after laptop was upgraded to windows 10 Do you know of any issues? Thanks Dave"
Nov 5
skipbern updated their profile
Nov 3
No Name updated their profile
Oct 27
Joe Shabbott liked Moderator - Raymarine, US's discussion Interfacing a Raystar 130 GPS Sensor to an E-Series Widescreen MFD (E90W, E120W, E140W)
Oct 23
Michael replied to Moderator - Raymarine, US's discussion SeaTalkng Communications Protocol
"Hi, these are good docs on the phys network, but there doesn't appear to be any protocol info in these docs. is there any doc on the sentences? Or is STNG the same sentences as NMEA2000 sentences?  thx"
Oct 22
Richard Anderson updated their profile
Oct 3
Mark noe updated their profile
Sep 12

© 2016   Created by Moderator - Raymarine, US.   Powered by

Badges  |  Report an Issue  |  Terms of Service