Hi, i own 3 tempest units and i logged the data of the 3 tempest units in a homemade wind tunnel with same hub to test accuracy. Was tested one tempest at time in the same position x.y and z.
And i find out they have huge different values between each other. Values below.
FAN AVERAGE WIND SPEED TESTED WITH WEATHER FLOW HAND ANEMOMETER = 10.7 km/h
Tempest 1 average value in 5 min interval= 10.4 km/h . DV.ST = 0.483
Tempest 2 average value in 5 min interval= 9.2 km/h . DV.ST = 0.234
Tempest 3 average value in 5 min interval= 6.9 km/h . DV.ST = 0.200
Anyone knows why is that?