[CA] [CA11] Wind instrument not reading speed

[MarkXal]

We used an oscilloscope to diagnose the wind transducer and saw that it was not operating correctly, as it was not producing a square wave on the yellow wire. Thus the ITC-5 was innocent. We took it down from the mast and disassembled it.
There was water in the unit, and the optocoupler component used to detect revolutions in the anemometer had detatched from the PCB. We resoldered it in place and the system works perfectly now.

Not sure why it detatched, but I think that water got into the unit while it was stored horizontally, then froze during the winter and due to expansion it ripped the optocoupler off the board.