1. Construction principle
It is an instrument capable of measuring low wind speeds, with a measurement range of {{0}}.05-10m/s. It consists of two parts: a hot ball probe and a measuring instrument. The probe has a glass ball with a diameter of 0.6mm, surrounded by a nickel chromium wire ring for heating the glass ball and two series connected thermocouples. The cold end of the thermocouple is connected to a phosphor copper pillar, directly exposed to the airflow. When a certain amount of current passes through the heating coil, the temperature of the glass ball increases. The degree of increase is related to the wind speed, and the degree of increase is greater when the wind speed is low; On the contrary, the degree of increase is small. The magnitude of the increase is indicated on the meter by a thermocouple. Based on the reading of the electricity meter, check the calibration curve to determine the wind speed (m/s).

2. Usage

⑥ After measuring several points (about 10 minutes), steps ③ and ④ above must be repeated once to standardize the current inside the instrument;

3. Precautions