Anemometer that always detects wind
I bought a complete station, I positioned the anemometer correctly and not far from another weather station of mine that works perfectly. Now I have a problem, the netatmo anemometer always detects wind at 3-4 km/h with gusts of 8-10 km/h even when there is no wind. My other weather station confirms the absence of wind. I have dissociated and re-associated the anemometer from the station several times, but the problem persists.
Now I have put the anemometer in a large container where there is no air circulation but it continues to always detect 3-4 km/h.
It could be that it is broken, or what could it be.
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I ran a similar test with similar results after getting my anemometer (placed it inside a box). I just assumed that there was nothing that could be done to correct the issue so I never reported it. I am assuming that it is fairly accurate for higher speed winds but I have no way of testing that.
Updating my post: While I never saw 0 mph wind speeds when I did the in-the-box tests I did just go through my history and I found some 0 MPH data points.
Checking the map and in particular the anemometers present in my region, I noticed that I have never been able to see a wind at 0 Km/h but at least 1 or 2 as minimum values, This makes me think that the ultrasound system is not suitable for light winds. In addition, I do not understand why it does not give zero in the absolute absence of wind, this is a very serious defect in my opinion, especially for what it costs. However, I bought a new one and returned the other. It should arrive tomorrow and then I will put the result of the tests always on this post.
I continue the discussion on the anemometer. I received the new anemometer this morning and mounted it immediately. Compared to the previous one, I have readings between 2 and 3 km/h continuously and checking with my other barometric station, this one recorded winds at a maximum of 1.3 km/h. However, when the other station reports no wind, the Netatmo always reports 2 or 3 km/h of wind.
Now we need to understand if the other station actually detects correctly, considering that it has the classic mechanical anemometer with bearings and rotating blades. I believe this is affected, even if only slightly, by friction, while the Netatmo, which is electronic, could be more sensitive.
Now I ask for feedback from those who have mounted anemometers, if you have ever seen it over time report no wind for long periods and not a peak of 5 minutes.
I deduce that for the moment it is not possible to assert with certainty whether it works correctly.
I will wait for stronger winds where the forces on the vane anemometer should drop on the measurements.
I add the sensation of wind from 1 KM/h to 3 Km/h
1 km/h: The wind is almost imperceptible. You may feel a very slight coolness on your skin only if you are very attentive or if the air is particularly cold or warm compared to your body temperature. The leaves of the trees remain still.
2 km/h: A very light breeze, still difficult to perceive. You may feel it on your skin if you are in an open and very calm area. A breath of air may just move the hair on your arms or the pages of an open book.
3 km/h: The wind is now felt better, especially on smooth surfaces of the skin or if you are walking against the wind. It may slightly move very fine hair or a candle flame with an imperceptible flicker. The lighter leaves begin to move slightly.
My new anemometer reads 14 kph inside with no wind. Is there a way to calibrate zero wind speed?
Hi - I installed my anemometer a few days ago and also notice very odd readings, was getting 6km/h when it was sitting on the kitchen table. And now it is mounted outside it tells me it is very windy when there is barely a breeze. There is a 0% chance there were gusts up to 59 km/h this morning. Reading the help center it seems that there is no way to resolve this. I calibrated the height as it is not at 10m so wonder if the algorithim that is used for this could be part of the issue?
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