How to maintain the temperature and humidity test chamber can increase the service life Many customers have asked: “How to maintain the temperature and humidity test chamber and increase its service life?†Let’s explain it to you by our Haotian Xiaobian: Applicable to the adaptability test of electrician, electronics, instrumentation and other products, parts and materials in storage, transportation and use under high and low temperature, hot and humid environment; it is cold resistance of all kinds of electronic, electrical, electrical, plastic and other raw materials and devices. Reliability testing equipment for heat resistance, moisture resistance, dry resistance test and quality control engineering. Proper use and operation of the constant temperature and humidity test chamber not only provides an accurate basis for the test personnel, but also enables the constant temperature and humidity test chamber to operate normally for a long time and prolong the service life of the equipment. First, when doing the constant temperature and humidity test, be familiar with the sample performance, test conditions, test procedures and test techniques of the required test. Be familiar with the technical performance of the constant temperature and humidity test chamber used, and construct the equipment. Be aware of this, especially the operation and performance of the constant temperature and humidity chamber temperature and humidity controller. Also carefully read the operating manual of the test equipment, in order to avoid the abnormal operation of the test equipment caused by the operation error, resulting in damage to the test sample, the test data is not correct. Second, a reasonable choice of constant temperature and humidity test chamber. In order to ensure the normal operation of the test, appropriate test equipment should be selected according to the different conditions of the test sample, and a reasonable ratio should be maintained between the test sample and the effective volume of the test chamber. For the test of the heat test sample, the volume should be no more than one tenth of the effective volume of the test chamber. For non-fever test samples, the volume should be no more than one-fifth of the effective volume of the test chamber. For example, when a 21` color TV is used for temperature storage test, a one-cubic-volume test box can be used to meet the requirements. When it is energized, it can not meet the requirements. It should be replaced with a larger test chamber. Because the TV has to radiate heat while working. Third, place the test sample correctly. The position of the test sample should be more than 10cm away from the wall of the box, and multiple samples should be placed on the same plane as much as possible. The sample should be placed without blocking the air outlet and the return air outlet, and the temperature and humidity sensor should also be set a certain distance. To ensure the correct test temperature. Fourth, the environmental test for the medium to be added in the test should be correctly added according to the test requirements. For example, the water temperature of the constant temperature and humidity test chamber is required. The water resistivity of the test chamber shall not be less than 500 ohms. The general tap water resistivity is 10-100 ohms. The distilled water resistivity is 100-10,000 ohms. The ionic water resistivity is 10,000-100,000 ohm-meter. Therefore, the constant-temperature and humidity test water should be distilled or deionized water, and it must be fresh. Because the water is in contact with air, it is easily contaminated by carbon dioxide and dust, and the water is soluble. The nature of many substances, after a long time, the resistivity will decrease. There is now a pure water on the market that is economical and convenient, and its electrical resistivity is equivalent to distilled water. Fifth, the use of constant temperature and humidity test chambers. Constant temperature and humidity box with wet ball gauze wet ball paper has certain requirements, not any gauze can be substituted, because the relative humidity reading is the root distance is the difference between temperature and humidity, strictly speaking, it is related to the local atmospheric pressure and wind speed at that time. The wet bulb temperature indication is related to the amount of water inhaled by the gauze and the surface evaporation. These are directly related to the quality of the gauze, so the meteorological regulations stipulate that the wet ball gauze must be a special "wet ball gauze" woven into linen. Otherwise it is difficult to ensure the correctness of the wet bulb thermometer, that is, the correct humidity. In addition, the placement of the wet ball gauze is also clearly defined. The length of the gauze is 100mm. The sensor probe is tightly wound. The probe is 25-30mm away from the humidity cup. The gauze is immersed in the water cup to ensure the correctness of the equipment control and the correctness of the humidity. Balloon Arch Kit ,Balloon Garland Kit,Balloon Arch Stand,Rose Gold Balloon Arch NINGBO YAOTU TRADING COMPANY , https://www.ningboyaotu.com