The test sample is placed in a corresponding test chamber to detect a certain ability. In the constant temperature and humidity test chamber, the test samples are tested for their high temperature resistance, low temperature resistance and humidity resistance according to the specified temperature and humidity. Because of long-term use or improper operation, affecting the normal temperature and humidity range, how to control correctly is a serious problem. The temperature and humidity required in the test can be controlled by the instrument to control the motion state of each component to achieve the conditions specified in the test, while the heat output through the solid state relay and the refrigeration cycle of the compressor. The temperature is lowered to achieve its dynamic balance so that the temperature inside the tank reaches a constant state. In the heating device is the key to control the temperature rise of the constant temperature and humidity test chamber. When the temperature control command is obtained, the voltage is output to the relay, which is about 3-12 volts DC added to the solid state relay. It is used together to achieve the set range value. The controller of the test box is added to the on-off regulation of the solid state relay. On the meter, the heating output on the screen can be seen to adjust the heat generation. In the internal temperature and humidity problems, certain adjustments are made according to the test conditions. The internal temperature and humidity of the constant temperature and humidity test chamber are properly controlled, and the internal controller and relay play a key role. Adjust the temperature and humidity values ​​in each system for the best purpose. Sonic Rechargeable electric toothbrush Sonic Rechargeable Electric Toothbrush,Ultrasonic Toothbrush,Replaceable Toothbrush Head,Electric Toothbrush With Timer GUANGZHOU WANYUAN INDUSTRIAL CO.,LTD. , https://www.wanyuanfuture.com