JDCAVE
Guru
- Joined
- Apr 3, 2011
- Messages
- 2,905
- Location
- Canada
- Vessel Name
- Phoenix Hunter
- Vessel Make
- Kadey Krogen 42 (1985)
My Raymarine fish finder was beginning to fail, loosing bottom at 200'. It was either the unit or the transducer. Initially I installed the Furuno FCV-628 and hooked up the existing transducer. It became clear the transducer was on its way out. I pulled the boat out of the water and installed a new Furuno 525STID-MSD Transducer. This is a triducer, with speed through water and temperature in addition to depth. An extension cable was needed to complete the install. All transducer parts and extension cable made by Airmar. The transducer fit in with the existing hole and faring, which was a good thing.
I'm now trouble shooting the temperature function of these units. I am getting a strong bottom signal so that is fine and a big inprovement on the old transducer. The boat is at the dock so have not checked speed yet. I am unable get temperature I phoned Furuno and spent a considerable time with Furuno working through the menus and checking functionality. The tech thought the transducer was the issue, so I phoned Tech support at Airmar. The tech walked me through checking impedance on the transducer cable at 4 pin and 7 pin. I got 18.35 K Ohms, which is consistent with 53 degrees F, and that is probably the proper water temperature. I also checked this at end of the extension cable and got a similar value, so the extension cable checked out. The Airmar Technician suspects the Furuno 628 and suggests a definitive test of putting a 10,000 Ohm resistor across pins 4 and 7, which should register a temperature on the Furuno unit of 77 F.
I am going to search out this resistor, but post here as an update to my progress this far. If anyone has any experience with working through this, I am all ears (and eyes).
Jim
I'm now trouble shooting the temperature function of these units. I am getting a strong bottom signal so that is fine and a big inprovement on the old transducer. The boat is at the dock so have not checked speed yet. I am unable get temperature I phoned Furuno and spent a considerable time with Furuno working through the menus and checking functionality. The tech thought the transducer was the issue, so I phoned Tech support at Airmar. The tech walked me through checking impedance on the transducer cable at 4 pin and 7 pin. I got 18.35 K Ohms, which is consistent with 53 degrees F, and that is probably the proper water temperature. I also checked this at end of the extension cable and got a similar value, so the extension cable checked out. The Airmar Technician suspects the Furuno 628 and suggests a definitive test of putting a 10,000 Ohm resistor across pins 4 and 7, which should register a temperature on the Furuno unit of 77 F.
I am going to search out this resistor, but post here as an update to my progress this far. If anyone has any experience with working through this, I am all ears (and eyes).
Jim