What is the construction principle of the thermal bulb electric anemometer
The construction principle of the thermal bulb electric anemometer is an instrument capable of measuring low wind speed, and its measurement range is 0.05-10m/s. It is composed of two parts: a thermal ball probe and a measuring instrument. The probe has a glass ball with a diameter of 0.6mm, and a nickel-chromium wire coil for heating the glass ball and two thermocouples connected in series are wound inside the ball. The cold junction of the thermocouple is attached to a phosphor-bronze post exposed directly to the air flow. When a certain size of electric current passes through the heating ring, the temperature of the glass bulb rises. The degree of increase is related to the wind speed, and the degree of increase is large when the wind speed is small; otherwise, the degree of increase is small. The magnitude of the rise is indicated on the meter by means of a thermocouple. According to the reading of the electric meter, check the calibration curve to find out the wind speed (m/s).
5 precautions when using anemometer
In our daily life, it is not difficult for us to find that there are many subtle but ubiquitous things around us, just like the wind around us. As far as the wind alone is concerned, we can feel the coolness brought by the evening wind in the summer evening. And the occasion that people can't ignore its existence is in the cold winter, when the biting cold wind blows head-on, so that people outside can fully feel the existence of the wind. But wind is an indispensable part in many of our fields. As far as agriculture is concerned, when our crops are pollinating, without the help of wind, the conditions for spreading pollen are largely missing. At the same time, the requirements for wind direction and wind speed are also very strict, and with the help of our wind speed and direction instrument, our difficulties are largely alleviated. Now let us briefly talk about the matters needing attention when using the anemometer!
1. Do not disassemble or modify the anemometer. Otherwise, electric shock or fire may result.
2. During use, if the anemometer emits abnormal smell, sound or smoke, or liquid flows into the anemometer, please shut down immediately and take out the battery. Otherwise, there will be danger of electric shock, fire and damage to the anemometer.
3. Do not expose the probe and anemometer body to the rain. Otherwise, there may be danger of electric shock, fire and personal injury. Do not touch the sensor part inside the probe.
4. When the anemometer is not in use for a long time, please take out the internal battery. Otherwise, the battery may leak and cause damage to the anemometer.
5. Do not place the anemometer in places with high temperature, high humidity, dust and direct sunlight. Otherwise, it will cause damage to internal components or deterioration of the performance of the anemometer.
