How should the humidity of a small constant temperature and humidity incubator be controlled

how to control the humidity of the small constant temperature and humidity incubator
the constant humidity incubator has accurate temperature and humidity control system, can provide the necessary environmental model conditions for industrial research, biotechnology testing, applicable to environmental protection, health and epidemic prevention, drug testing, agriculture and animal son, aquaculture and other scientific research, institutions, production departments, is water quality analysis and BOD testing, breeding testing, plant cultivation of special constant temperature and humidity equipment1, humidity does not go down
in the wet and hot test, the actual humidity will reach 100% or the actual humidity and target humidity difference is very large, the value is very low, the former phenomenon: may be caused by the drygauss on the wet ball sensor, it is necessary to check whether the water shortage in the wet ball sensor sink, the water level in the sink is automatically controlled by a water level controller, check whether the water level controller water supply is normal, water level controller is normalAnother possibility may be the use of wet gauze, or the reason for the purity of water quality, will make the gauze hard, so that the gauze can not absorb moisture and dry, as long as the replacement or cleaning of gauze can be ruled out above phenomenonThe latter phenomenon is mainly the humidification system does not work, check the humidification system water supply system, whether there is a certain amount of water in the water supply system, control the humidification boiler water level control is normal, humidifier boiler water level is normal2, humidity does not go up
humidity does not go up should be humidified heating tube did not workCheck that the heating tube is open, that the heating circuit is open or that the fuse is burned because of a short circuit, that if the fuse is burned, the solid state relay is checked for breakdown when overhauling, and if the main circuit is OK to check that the controller output is damaged3, low temperature not tolow temperature can not reach the test target, then you have to observe the temperature change, is the temperature drop is very slow, or the temperature to a certain value after the temperature has a rebound trend, the former should check, do low temperature test before the studio drying, so that the studio to keep dry before the test samples into the work room to do the test, work room Whether the test sample is placed too much, so that the wind in the studio can not fully circulate, after the above reasons, it is necessary to consider whether it is a failure in the refrigeration system, the latter phenomenon is due to the poor use of the equipment environment, the ambient temperature placed by the equipment, placed in place (the distance from the rear of the box and the wall) to meet the requirements (in the equipment operation instructions have provisions)4, high temperature does not go toin the high temperature test, such as temperature changes can not reach the test temperature value, you can check the electrical system, one by one troubleshootingIf the temperature is rising very slowly, to see the wind circulation system, to see if the wind cycle of the adjustment bezel is open normal, on the contrary, check whether the wind cycle of the motor operation is normalIf the temperature is excessive, then the setting parameters of the PID need to be adjustedIf the temperature rises directly and the temperature is protected, the control instrument must be replaced if the controller fails