Before using the hand-held anemometer, observe whether the pointer of the meter points to zero. If there is any offset, you can gently adjust the mechanical adjustment screw of the meter to return the pointer to zero point! After calibration, gently pull the screw plug to expose the probe (the length can be selected as needed), and make the red dot on the probe face the wind direction. According to the meter reading, check the calibration curve to find the measured wind speed.
How to use the handheld wind speed meter!
Wind Sensor 