When should the wet bulb gauze of the high and low temperature humid heat alternating test box be replaced? What about the frequency? Let's talk about it.
First, the common high and low temperature humid heat alternating test box on the market are used to control and measure the humidity by the way of wet and dry bulb control. The temperature of the wet bulb is mainly put the wet bulb gauze on the wet bulb sensor, and then measure the humidity through the program operation of the instrument. The humidity here is the relative humidity, unit %RH. Two, because of the influence of water, wind and the aging of shabu itself, shabu will also turn yellow or dry at a certain level, and the cycle time of dismantling in this case will be up to one month. Three, because of the high low temperature alternating test box and the high and low temperature cold dampness test box has a high temperature beings, dry bulb temperature sand cloth while water absorption ability is good, but under the condition of high temperature, dry bulb temperature turn yellow sand cloth or dry, water absorbing capacity influence it, at that time, the temperature of the dry bulb temperature will be banned and humidity can be as high and dry bulb temperature, and even higher than dry bulb temperature, In this case, the ambient humidity is displayed as 99.9%RH, or RH. That's when it has to be replaced. That is, the circulation system detection of high temperature and cold humidity is often done, so the frequency of dismantling and replacing the cloth is relatively high. Because of this, the wet-zone sphere control method should not be used if the rapid temperature change test chamber must also be controlled by ambient humidity. The dry bulb temperature polymer material controller must be selected.
