On Wed, 5 Nov 2008 22:19:08 -0500, wrote:

I have a problem with my Heathkit ID-4001 Weather Station. The wind
speed works fine if there is any wind but when there is a calm wind
condition it occasionally starts giving erratic wind speeds. If it
should be reading zero speed, it reads zero and then jumps to a higher
wind speed, such as 32 and then back down to zero or up to 41. There
doesn't seem to be any pattern that I can discern. The actual wind
speed values tend to be random and when they occur appears to be random.
It can go for some time sitting at zero and then give an erroneous
reading or several erroneous readings in quick succession and then set
at zero for an another period of time. As soon the wind picks up it
appears to read the wind speed flawlessly.

Any ideas on what the problem might be or what to check for?

Thanks.

Just a few comments and a question. I also have a ID-4001 thats been running
flawlessly for the past 30?? or so years. I have no problems with the speed or
direction electronics but the outdoor plastic is starting to disintigrate. Last winter I
lost one wind cup. I did have to replace the outdoor multistrand cable when the insulation
crumbled. A shorting cable may be part of your problem. At one point in the distant past
I had the 4001 hooked up to a H8 for data loging. I was an avid kit builder back then.
Many T storms have passed over the 4001 and never caused any problems. I have looked
for a replacement wind cup and there is none to be found. One company still markets a
5001 (lcd) using the same boom and sensors but they seem to be vaporware. So my question
is, anyone know where I can get a replacement or something that I can fit in place. Also
tried Data Professionals http://www.d8apro.com/heath1.htm none left in stock.

Steve