Tell the common problems of high and low temperature damp heat test chamber and its solution
Main purpose of damp heat test box: It is suitable for the adaptability test of electrician, electronics, instrument and other products, parts and materials in storage, transportation and use under high and low temperature alternating heat and humidity environment; it is all kinds of electronics, electrician, electrical appliances, High-quality materials such as plastics, heat-resistant, moisture-resistant, dry-resistant test and quality control equipment; , low temperature resistance, humidity resistance cycle test. The damp heat test chamber meets the criteria: GB/T 2423.1-2008 Test A: Low temperature test method GB/T 2423.2-2008 Test B: High temperature test method GB/T 2423.3-2008 Test Ca: Constant damp heat test GJB 150.3A-2009 high temperature test GJB 150.4A-2009 Low temperature test GJB 150.9A-2009 Damp heat test Damp heat test chamber product features The imported temperature and humidity controller is adopted, and the box body is processed by CNC machine tool, which is beautiful in appearance and easy to operate. The inner bladder of the box adopts imported high-grade stainless steel (SUS304) mirror panel, and the outer shell of the box adopts SUS304 high-low temperature resistant stainless steel plate. The water supply tank is placed in the lower right part of the control box and has automatic water shortage protection. The large observation window is equipped with a illuminating light to keep the inside of the box bright, and the inside of the box is clearly observed at any time by using the tempered glass embedded in the heating body. The waterway system piping circuit system is gate-opened for easy maintenance and overhaul. A double-layer, high-temperature, high-tension seal is used between the door and the cabinet to ensure the sealing of the test area. The left side of the cabinet is equipped with a test hole with a diameter of 50mm, which can be used for external test power or signal lines. High quality fixed PU movable wheel on the bottom of the machine Damp heat test chamber control system: South Korea imported TEMI300 button-type instrument, PID microcomputer SSR temperature controller; external boiler steam humidifier has energy-saving and consumption-reducing function, can save 70% energy consumption, electrical control main parts use imported "Schneider" components to better control temperature ; The insulation system is filled with ultra-fine glass fiber insulation zone, and the inner and outer joints are made of non-metal resistant high and low temperature materials to effectively reduce temperature conduction. Performance characteristics of the damp heat test chamber The detection range of the product used in the damp heat test machine includes the heating, cooling, humidification, dehumidification and reliability analysis of the product. With automatic calculation function, the temperature and humidity change conditions can be corrected immediately, making the temperature and humidity control more precise and stable. The humidification process of the high and low temperature damp heat test chamber is actually to increase the water vapor partial pressure. The more primitive method is to spray water to the test chamber wall, and the water surface saturation pressure is controlled by controlling the water temperature. The water on the surface of the tank wall forms a large surface, and on this surface, the water vapor pressure is added to the tank by means of diffusion into the high-low temperature damp heat test box to increase the relative humidity in the test chamber, since the humidity is mainly controlled by water. The silver-electric contact type conductivity meter performs simple switching adjustment, and has poor adaptability to the control of the water temperature of the hot water tank with large hysteresis. Therefore, the transition process of the control is long, and the need for the humidification of the alternating humid heat is not satisfied. More importantly, when spraying the wall of the tank, it is inevitable that water droplets drip on the sample to form different degrees of contamination on the sample. At the same time, there are certain requirements for the drainage in the high and low temperature damp heat test box. This method was quickly replaced by steam humidification and shallow water pan humidification. Steam humidification is suitable for air conditioning and air duct humidification systems, high-precision humidification sites, etc. Shallow water tray humidification is mainly used in wet heat boxes. Damp heat test box parameter specifications This test equipment prohibits: testing and storage of flammable, explosive, volatile substances samples, testing and storage of corrosive substances samples, testing or storage of biological samples, testing and storage of strong electromagnetic emission source samples. Equipment model THC-150PF type Studio size 500*500*400 Dimensions 750*1224*1515 Total power About 3.5KW Main performance parameters temperature range -40°C～+150°C Temperature deviation ≤±2.0°C Temperature fluctuation ≤±0.5°C Humidity range 20 to 98% RH Humidity deviation +2%RH /-3% RH Temperature rise and fall rate Heating time 2~3°C/min (when the device is empty) Cooling time 0.7~1°C/min (when the device is empty) Volume Rise Dongguan Haotian company high and low temperature damp heat test box has another volume: 80L, 100L, 150L, ​​250L, 408L, 500L, 600L, 800L.1000L any purchase! Damp heat test box common problems and solutions 1. The ground around the fuselage and the bottom should be kept clean at all times; 2. The machine should remove the internal impurities (objects) before operation; at least once a year in the laboratory; 3. When opening or closing the test object from the box, do not allow the item to come into contact with the door seal; 4. When the product is taken after the test product arrives, the product must be picked up and put in the off state. 5. The refrigeration system is the core of the constant temperature and humidity test chamber. It is necessary to inspect all copper pipes for leaks once every six months. All functional joints and welded joints must be disposed of immediately if there is any oil spill. 6. The condenser should be regularly maintained and kept clean. Dust-adhesive condenser will cause the compressor high-voltage switch to trip and cause false alarm. The condenser should be regularly maintained monthly. Use the vacuum cleaner to remove the dust attached to the condenser heat-dissipating mesh or use a hard brush after booting. Brush or use a high pressure nozzle to blow off the dust. 8. Circuit breaker and over-temperature protector provide the test products and the operator's safety protection, so please check regularly; please read the instructions carefully before the user can operate the machine. Party Drinking Toys,Plastic Indoor Toys,Wooden Indoor Toys,Adult'S Indoor Toys NINGBO PAPER GAMES KINGDOM CO.,LTD , https://www.papergameskingdom.com
7. At the end of each test, it is recommended to clean the test chamber with clean water to keep the equipment clean; after the cabinet is clean, the box should be dried to keep the box dry;