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 for
cabin top
work. 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.