Greetings All! This is my first post on this forum. I'm trying to trace a nagging problem with the wind
instrument in my Simrad
IS20 suite. I installed it new three years ago and enjoyed a season of networked navigation
instrumentation bliss. I tied in the Lawrence HDS Gen 2 Plotter, DST800 Transducer
, Point-1 GPS Antenna
, Link8 DSC Radio
, IS20 Combination, IS20 Compass
and IS20 Wind
Instrument. Each IS20 display, the DST800 and Simard 508 Wind Transducer
are each connected individually to an NMEA2000 hub which is also connected to the Point 1, DSC Radio
and Lawrence Plotter. Each were talking nice with each other until I hauled Misty for the winter and unstepped the mast
. The yard cut the network cable instead of unplugging it. After that the wind display would not show speed or direction. It would power up just like all the other displays, go through it's set up mode, but would then only display ------ across the screen
and the direction needle wouldn't move. I've attempted every combination of removing other network devices and hooking just the wind instrument up. Nothing resulted in a different result. I climbed the mast
and removed the Simard 508 wind transducer and hooked it up directly to the network bi-passing the network cable from the mast and it worked fine. I'm suspecting a problem with the network cable in the mast.
Has anyone else had similar problems? It is possible, although not likely, that a hardware
attachment on the mast effected the cable inside. There are 5 conductors...blue, white, red, black and the shield. I tested continuity with a Fluke 322 clamp meter and the blue and white conducted tested positive...approximately 122 ohms. That could be a short between the two or it could be they are meant to be if sending data from the transducer. What else should I be checking in order to identify the problem?
Thanks in advance for your comments and guidance.