The forced convection oven is mechanical equipment commonly used in the laboratory to reduce the moisture of substances by using heat energy. It is used to dry the substances and is common drying equipment in the laboratory. The water in the material overflows by vaporization. The purpose of drying the material is to use or further process the need. Hot air drying oven is used for industrial and mining enterprises, laboratories, scientific research units such as drying, baking wax, sterilization. So how to maintain and use the drying oven? 1. users must read the operation manual and notice carefully 2. use the drying oven, we must pay attention to the conformity of all the power supply voltages. When using, the socket ground wire of the power supply must be grounded according to the regulations of use to ensure the safety of the machine and the user. 3. do not touch the drying oven by hand as an electrical part of the left space or rinse with water with a wet rag wiping machine. When repairing the drying oven, cut off the power cord. 4. samples put into the air circulation oven, pay attention to check, flammable, volatile items can not be put into the drying oven for drying. And the items placed should not be overloaded and too dense. It is necessary to leave space for natural convection of air so that the moist air can accelerate the overflow at the top of the dryer and can’t be placed without material for drying. 5. the power cord of the lab oven should not be wound on the metal material, do not imitate the high temperature or wet place, also check the installation position of the heater electric heating wire, confirm the normal use of the electric heating wire. 6. drying oven should regularly check whether the silver contact of the temperature regulator is hairy or uneven. If so, the contact can be sanded with gauze and then used and should be cleaned with a clean cloth regularly to make it in good contact (note that the power supply must be cut off). Do not impact metal pipes of indoor temperature regulators to avoid affecting sensitivity. 7. After connecting to the power supply, set the temperature to the required one, the temperature indicator light is on, the temperature begins to rise, and the blower can be opened at the same time, and the blower is running normally. When the temperature rises to a predetermined temperature, the constant temperature indicator lights up and the temperature controller automatically controls the temperature.

Some electronic components are required to operate and store under low humidity conditions. According to statistics, more than 1/4 of the world’s industrial manufacturing rejected products are related to moisture hazards. For the electronic industry, the harm of humidity has become one of the main factors of product quality control. Next, EJER will introduce you precautions for the use of drying cabinets for electronic components storage. (1) Integrated circuits: the harm of humidity to the semiconductor industry is mainly manifested in the ability of humidity to penetrate IC plastic packaging and through gaps such as pins, and generate IC moisture absorption phenomenon. During the heating of the SMT process, And the moisture inside the IC expands to form steam, A pressure resulting in cracking of the IC resin package, And oxidize the metal inside the IC device, Cause product failure. In addition, During the welding of the PCB plate, Because of the release of steam pressure, It will also lead to virtual welding. According to IPC-M190J-STD-033B standards, SMD elements exposed to high humidity air, 10 times the exposure time must be placed in a drying storage cabinet below 10% RH humidity, To restore the component’s “workshop life “, Avoid scrap, ensure safety. (2) Electronic devices in the course of operation: semi-finished products in the package to the next process; PCB before and after the package to the electrification; unsealed but not yet used IC、BGA、PCB, etc.; devices waiting for tin furnace welding; baked devices to be returned to temperature; unpackaged finished products, etc., are exposed to moisture. (3) Liquid crystal devices: glass substrates, polarizers and filters of liquid crystal devices such as liquid crystal display screens are cleaned and dried in the production process, but they will still be affected by moisture after cooling down, thus reducing the qualified rate of products. Therefore, after cleaning and drying, it should be stored in a dry environment below 40% RH. (4) Other electronic devices, such as capacitors, ceramic devices, connectors, switches, solder, PCB、 crystals, silicon wafers, quartz oscillators, SMT adhesives, electrode materials adhesives, electronic slurries, high-brightness devices, and various moisture-proof electronic devices, are exposed to damp (5) The finished electronic machine will also be affected by moisture during storage. If the storage time is too long in the high humidity environment, it will lead to the failure, and for the computer card CPU, the gold finger oxidation will lead to the bad contact failure. The harm of humidity causes serious problems to the quality control and product reliability of the electronic industry. Dry according to IPC-M190 standard. Visit our website https://www.dry-cabinet.cn for more details.

EJER, professional production of intelligent nitrogen cabinet, nitrogen saving cabinet, stainless steel nitrogen cabinet with patents, welcome to inquire! An intelligent nitrogen-saving cabinet, using the built-in sensor and microcomputer control system can automatically cut off the output of nitrogen when the humidity in the nitrogen cabinet reaches the set value, which can greatly save the consumption of nitrogen and save the cost. Considering the working environment o f nitrogen n2 cabinet, such as a fluorescent lamp or other large  equipment, reflow welding, wave soldering will release electromagnetic signal, which may interfere with the solenoid valve built-in nitrogen cabinet and affect the use. EJER electronic nitrogen n2 cabinet uses SMC nitrogen-saving modules, reliable performance temperature, less affected by the external environment. EJER nitrogen n2 cabinet can be divided into different materials, such as cold-rolled plates with baking paint and stainless steel 304. Stainless steel nitrogen cabinet is more clean, suitable for use in a cleanroom, better ensures the safety of the device. For more information about the N2 cabinet, pls visit us: https://www.dry-cabinet.cn/prolists2.html

Many customers in purchase drying cabinets, because of the storage of different products and door opening frequency, the salesman will recommend an anti-oxidation nitrogen cabinet, so what is the difference between an electronic drying cabinet and n2 cabinet? The n2 cabinet, also known as the nitrogen cabinet, mainly uses the intelligent nitrogen filling de vice to wash into the nitrogen gas, which can not only achieve moisture-proof and low humidity purpose, but also achieve the anti-oxidation effect. The nitrogen cabinet mainly adapts to the anti-oxidation storage of the oxidation-sensitive materials and devices. The principle of an electronic drying cabinet is physical moisture absorption, mainly using physical adsorption molecular sieve, through a specific way to drain water out of the cabinet, always cycle work, so that the humidity in the cabinet is low. Physical moisture absorption is simple to use. Direct plug-in, no consumables, low power, no noise, suitable for most occasions. The difference between the two is mainly in function and performance, physical moisture absorption can be stored according to the requirements of storage humidity, medium humidity, low humidity, ultra-low humidity can reach a better state, the advantage is that there are no consumables, electricity is available. Nitrogen cabinet needs to be combined with nitrogen, has the ability of rapid dehumidification, can quickly reduce humidity to 1%RH, open door recovery only 5-10 minutes, suitable for frequent open-door use, nitrogen cabinet mainly use humidity settings to control air intake, It can improve the cleanliness of the cabinet and prevent oxidation. The above can understand the advantages and disadvantages of desiccator dry box and n2 cabinet, so we need to know the specific application at customer’s site before making a choice, as long as the choice can reach the storage effect is the most appropriate. Visit our website https://www.dry-cabinet.cn for more details.

Application Scope and Storage Reference of Dry Cabinet 60%~50%: Paintings, antiques, paper money, ancient books, fax paper, copy paper 50%~40%: Cameras, video cameras, lenses, microscopes, endoscopes, binoculars, magnetic tape, disks, records, film, photographic film, musical instruments, stamps, furs, medicinal materials, tea, coffee, cigarette and etc. 40%~20%: Precision hardware molds, measurement instruments, all electronic parts, PC  boards, metallic powders, semiconductors, medical supplies and etc. 20% or less: Sample, standard measuring tools, seeds, pollen, seedlings etc. 10%~20%: Electronic Components, IC, BGA and etc. 10% or less: Particularly sensitive to humidity of materials, such as IC, BGA and etc. with higher humidity requirements. The temperature is fickle, moisture-proof dehumidification is paid more and more attention by more and more families and electronic industrial units, and the electronic dry cabinet has become the best choice for moisture-proof dehumidification because of its convenient installation, rapid and stable dehumidification, and application in family and industry is becoming more and more extensive. Such as image materials, photographic equipment, digital electronic products, stamps, high-grade collectibles, electronic chips, silicon electromagnetic, medicine, optical supplies, and other wet-fearing items, as well as the solar energy industry, electronics industry, universities, colleges, and research institutes. Visit our website https://www.dry-cabinet.cn for more details.

1. the principle of EJER Humidity Control Dry Cabinet: the electronic drying cabinet adopts the principle of water vapor balance, that is, the water molecules in the air are constantly moving at irregular high speed. This movement leads to the diffusion of water molecules from high density to low density. The ultra-low humidity dry cabinet can store the articles in a relatively closed space to form a moisture-proof and oxidation-proof environment to prevent moisture absorption, moisture hydrolysis and oxidation. The electronic drying cabinet absorbs water molecules through molecular sieves composed of high-efficiency moisture-absorbing polymer materials, controls the internal and external doors for moisture absorption and dehumidification circulation, and finally drains the water molecules in the electronic drying cabinet out of the cabinet. Therefore, it can also ensure the stability of temperature, also known as constant temperature dehumidifier. 2. the principle of anti-oxidation function of EJER Humidity Control Dry Cabinet: we all know that oxidation is closely related to oxygen, temperature and humidity. Under the condition of high-temperature oxygen content, oxidation will occur under normal temperature and high humidity natural environment. Experiments show that oxidation occurs when the ambient humidity is higher than 40% RH, oxidation accelerates when ambient humidity is higher than 65% RH, ambient humidity is lower than 30% RH, most metals oxidize slowly, less than 10% RH, few metals oxidize, and electronic drying cabinets are based on this principle, Under low humidity (30% RH below) or even ultra-low humidity (10% RH below) environment, oxidation, mildew conditions do not exist anymore, oxidation prevention function is achieved. We have 20-60%EH series, 10-20%RH series, 1-10%RH series, 1-3%RH, you may choose the humidity range you need, https://www.dry-cabinet.cn.