i took my wind indicator and mounted it on my truck , with a spare piclog and laptop and drove it around to calibrate wind, i was way off from what you see above here.
i had it set at 20 pulses but ended up with a setting of 30 pulses.
at 5 mph it read 4.9 mph ,at 10 mph it read 10.2 ,at 15 mph it read 15 mph,at 20 mph it read 20.3 mph,at 25 mph it read 25.5 mph,at 30 mph it read 30 mph.
so i think it was reading 8-10 mph to high before.
when i get more wind il post new chart