Wind speed instrument belongs to safety, environmental monitoring kind measuring instrument, measurement in our country is the mandatory verification of measuring instruments. In addition to the factory sales need to be equipped with the appropriate calibration report, also need to according to JJG ( Construction) 0001 - 1992 'hot bulb anemometer verification regulation requirements regularly every year to the national air conditioning construction quality supervision and inspection center or the China construction science research institute in energy and environmental testing center for regular calibration, and according to its legal calibration certificate issued by the instrument to adjust all aspects in order to obtain zui better working condition. In addition to maintain the accuracy of the daily data, anemometer in daily maintenance use also note the following: 1. Prohibit use anemometer in the flammable gas environment. 2. It is forbidden to anemometer probe in the combustible gas. Otherwise, it may cause fire or explosion. 3. According to the requirements of the specification, please correct use of anemometer. Use undeserved, may cause damage to get an electric shock, fire and sensors. 4. In use, in case of anemometer sends out a abnormal smell, sound, or smoke, or a liquid into the anemometer internal, please remove battery to turn it off immediately. Otherwise, there will be damaged by electric shock, fire, and the risk of anemometer. 5. Don't expose probe and anemometer ontology in the rain. Otherwise, it may have the risk of electric shock, fire and injury and personal. 6. Don't touch the probe sensor parts. 7. Anemometer when not in use for a long time, remove the internal battery. Otherwise, the battery leakage, may cause damage of anemometer. 8. Do not place anemometer at high temperature, high humidity, dusty and direct sunlight. Otherwise, will cause the damage of the internal components or anemometer performance deteriorate. 9. Do not use volatile liquid to wipe the anemometer. Otherwise, it may lead to anemometer shell deformation and discoloration. Anemometer has a stain on the surface, can use soft cloth with neutral detergent to wipe.