1. Working and storage conditions that exceed the recommended operating range can lead to transient drift signals of up to 3% RH. When the normal operating bar is returned, the sensor slowly goes back into calibration. To speed up the recovery process / see Section 3, Recovery. Long-term use under abnormal operating conditions accelerates the product aging process. <br>Chemical Exposure The sensor layer of a resistive moisture sensor is hampered by chemical vapors, and the diffusion of chemicals in the sensor layer can drift the measurement and reduce its sensitivity. In a pure environment, pollutants are released slowly. The recovery process described below speeds up this process. High concentrations of chemical impurities can cause complete damage to the sensor layer of the sensor. <br>3. Recovery Process Sensors placed under extreme operating conditions or under chemical vapor can be restored to their state at the time of calibration by the following procedure. Humidity 50-60 ° C, 10% RH for 2 hours (dry), humidity 5 hours or more 20 ~ 30 ° C, hold .70% RH. <br>4. Temperature affects the relative humidity of the gas, which is highly temperature dependent. Therefore, when measuring humidity, the humidity sensor must be as safe as possible to operate at the same temperature. If the pressure cable plate is shared with heat-generating electronics, the DHT11 should always be kept away from the electronics and installed under a heat source while maintaining good ventilation of the chassis. The DHT11 and copper coatings on the other parts of the printed circuit board should be minimized and spaced between them to reduce heat transfer. <br>5. The light is exposed to too much sunlight and intense UV rays for a long time, which reduces performance.<br>6. Wiring Note It is recommended to use high quality shielded wire, which affects the communication distance and communication quality of the DATA signal line.
正在翻译中..