Why should pure water be used for the constant temperature and humidity test chamber?

Constant temperature and humidity chamber (LRHS-101-LH) will need to use water when doing temperature and humidity tests, generally using a special water tank or an external water tower to specifically supply water, if the water quality is not good, there will be some impact on the equipment, so what are the standards for the test water of the equipment? Does it affect the use of regular tap water?

It is okay to use general tap water, and the temperature effect can also be obtained, but if you use tap water for a long time as a temperature user, the water pipe is easy to grow out of the ditch, and the impurities in the tap water will also adsorb to the surface of the product, which will also cause the water tank to be unclean. In fact, as long as you pay attention to changing and washing tap water frequently, it is also okay. Our company recommends that customers use purified water or distilled water if possible.

The water quality of the constant temperature and humidity chamber will directly or indirectly affect the test, and will also affect the service life of the equipment. According to the water standard used by the equipment, the clean test Yonghui can avoid many adverse factors caused by water quality.

Generally speaking, the constant temperature and humidity test chamber is to use pure water to do the test, because pure water does not allow the accumulation of scale. Limescale can lead to pipe blockage, which can lead to the failure of the Constant Temperature and Humidity Test Chamber (HYH80).

If you do not use pure water, tap water may have an impact on the test, and in the long run, the water pipe will easily become dirty and affect the service life of the machine. Therefore, purified water is more recommended.

What are the characteristics of constant temperature and humidity test chamber? Please see the article of Zhongda Consulting.

What are the basic characteristics of the constant temperature and humidity test chamber: The constant temperature and humidity test chamber is a necessary testing equipment in aviation, automobiles, home appliances, scientific research and other fields, which is used to test and determine the parameters and performance of electrical, electronic and other products and materials after the temperature and humidity environment changes after constant testing. 1.

The constant temperature and humidity test chamber is processed and formed by CNC machine tools, with beautiful and generous appearance, and adopts non-reaction handle, which is easy to operate. 2.The inner box is made of imported high-grade stainless steel (SUS304) mirror panel, and the outer box is made of (SUS304) brushed stainless steel plate or high-quality cold-rolled steel plate sprayed plastic, which increases the appearance texture and cleanliness.

3.It is equipped with a large observation window with lighting to keep the box bright, and the tempered glass embedded in the heating body is used to clearly observe the situation in the box at any time. 4.

The left side of the cabinet is equipped with a test hole with a diameter of 25mm, 50mm or 100mm, which can be used for external test power or signal cables. 5.The insulation material is made of high-density glass fiber wool, with a thickness of 80mm.

Double-layer high-tension sealing strip with high and low temperature resistance is used between the door and the box to ensure the sealing of the test area. 6.It is equipped with an independent temperature limit alarm system, which automatically interrupts the operation when the temperature limit is exceeded to ensure that the test is carried out safely without accidents.

7.The humidification system pipeline is separated from the control circuit board, which can avoid failure due to water leakage of the humidification line and improve safety. 8.

The pipeline circuit system of the waterway system adopts a portal opening, which is convenient for maintenance and overhaul.

Constant temperature and humidity test chamber, also known as constant temperature and humidity testing machine, constant temperature and humidity test chamber, constant temperature and humidity test chamber, thermostat or constant temperature and humidity chamber, is used to test the performance of materials in various environments and test the heat resistance, cold resistance, dry resistance and humidity resistance of various materials. It is suitable for testing the quality of electronics, electrical appliances, communications, instruments, vehicles, plastic products, metals, food, chemicals, building materials, medical treatment, aerospace and other products.

It is used to test the performance of materials in various environments and test the heat resistance, cold resistance, dry resistance and moisture resistance of various materials.

Constant temperature and humidity aging test chamber is a precision instrument, used to test, inspect, inspect electronic and electrical components, spare parts or related industries to provide a simulation environment, for the accuracy and consistency of test data (repeatable) to provide the necessary conditions. The special constant temperature and humidity aging detection box for the electronics industry is suitable for investigating the moisture resistance of electrical and electronic products, components, parts and materials under different temperature and humidity conditions, and can also be used as an adaptability test for storage, transportation and use in high and low temperature environments.

The constant temperature and humidity test chamber can simulate high temperature, high humidity and low temperature.

Zhi low temperature, high temperature and low humidity DAO natural environment to detect production.

The performance of the version is generally used in the constant temperature and humidity test chamber, which is generally used in electronics, semiconductor, medicine, chemical, cosmetics, coatings, petroleum, food and other industries and universities, inspection and quarantine bureaus, commodity inspection, drug inspection, military academy, Chinese Academy of Sciences and other scientific research institutions.

By simulating the natural ambient temperature and humidity, the performance of the sample at a certain set temperature and humidity is tested. By increasing the conditions, we can see the changes in the sample in a short time.

The walk-in constant temperature laboratory developed by Suzhou Zhongchuangmeng Laboratory is mainly composed of a control system, a refrigeration system, a test reservoir, a circulating fan, a humidifier, a heater, etc. It is a testing equipment that provides the industry's large-scale temperature and humidity environment testing of finished products, semi-finished products and parts.

The constant temperature and humidity test chamber is suitable for testing the heat resistance, cold resistance, dry resistance, and damp heat resistance of various materials. as well as large.

Schools, colleges and universities, scientific research units, electrical appliances, communications, instruments, vehicles, plastic products, metals, food, chemistry, building materials, medical, aerospace and other products for quality testing. Programmable constant temperature and constant temperature test chamber and high and low temperature test chamber are used to simulate the operation of the test product in a high and low temperature humid and hot environment to evaluate the working quality of the product. According to the set temperature point, the output of the heater is controlled through the output result of PID automatic calculation, and finally a dynamic equilibrium is achieved, so as to achieve the role of screening or assessment test, improve the defects that are dissatisfied in the product development process, and reduce the risk of mass production of products by the factory.

Constant temperature and humidity test chamber is a very widely used environmental testing equipment, which is widely used in aerospace, electronic and electrical, materials, lithium batteries, LEDs, plastics, automotive components, scientific research institutes, etc., in high and low temperature or humid and hot environment, to test its performance.

Constant temperature and humidity test chamber, also known as high and low temperature alternating damp heat test chamber, is used to simulate the performance of materials in various environments and test the heat resistance, cold resistance, dry resistance and humidity resistance of various materials. It is suitable for testing the quality of electronics, components, circuit boards, electrical appliances, communications, instrumentation, vehicles, plastic products, metals, chemicals, building materials, medical, aerospace and other products.

Constant temperature and humidity test chamber is also called temperature and humidity cycle test chamber, damp heat aging test chamber, constant damp heat test chamber, high and low temperature damp heat alternating test chamber, used to test the high temperature resistance, low temperature resistance, humidity resistance, and drying resistance of various materials.

The constant temperature and humidity test chamber is widely used in electronics, electrical appliances, computers, batteries, capacitors, resistors, computers, motors, cables, wires, circuit boards, circuit boards, photovoltaic modules, semiconductors, lighting, crystals, inductors, mobile phones, optoelectronics, optical fibers, semiconductors, circuit boards, chemicals, coatings, building materials, instruments, meters, plastics, rubber, LEDs, LCD, PCB, metals, hardware, medical, military, automobiles, vehicles, Aerospace and other products to test the quality and use of university research units.

It can effectively and accurately test the product quality, and the constant temperature and humidity test chamber is extensive.

Applied to: high-end digital product storage, national defense, scientific research, culture, education and health, pharmaceutical industry, high-precision laboratory, power distribution plant, computer room, power station, medical, sterile room, shielding room, inspection and testing room, fiber pipe institute, electronics industry, production equipment industry, military industry, museum, library, archives, public security bureau, aircraft maintenance, automobile sealing, universities, research institutes, laboratories, quality inspection institutes, collection studios, archives, low-temperature cold storage, fresh-keeping cold storage, seed storage, quick-freezing storage, precision molds, precision electronic instrument production workshop and other application fields.

The constant temperature and humidity chamber is to test the performance and parameters of materials under high temperature, low temperature and constant damp heat tests. The constant temperature and humidity chamber often uses water in the humidity test, and the quality of the water will affect and damage the equipment. What are the requirements for the constant temperature and humidity chamber when using water?

The dust resistance of water and electricity for constant temperature and humidity box should be greater than 500 ohms. Because the greater the resistance, the better the insulation of water. If the water quality is too poor, it will have an impact on the service life of the humidity sensor. This can cause a short circuit in the humidity sensor.

Humidifiers all have a water level switch, and the float of the switch is a magnetic rod in the middle, and the float is not made of imitation oxidation material. Therefore, if the water is not changed for a long time, the water level switch will be short-circuited, resulting in the situation that it cannot be humidified or has been humidified.

Therefore, when customers buy constant temperature and humidity chambers, manufacturers will help customers install tap water filtration systems. In this way, impurities in the water can be filtered, so that the constant temperature and humidity chamber uses filtered pure water.

Pure water has less slag and is not easy to cause water blockage. The greater the resistivity of the constant temperature and humidity chamber, the better the insulation of the water, (the reciprocal of the resistivity is the conductivity, and the smaller the conductivity, the better) Then the constant temperature and humidity chamber used is generally humidified with pulse (sound wave), and the humidification medium is water. So why humidify with water?

Because the humidification particles with water are relatively large, if there is a requirement for humidity for a long time, it will have an impact on the service life of the humidity sensor, (humidity sensor: generally divided into capacitive sensor, Honeyfield sensor) but some of their PCB board circuits are not made of waterproof materials or anti-oxidation materials. If the water quality is poor, it will short-circuit the humidity sensor.

Secondly, the humidifier (Yadu humidifier for general users) has a water level switch, and the float of the water level switch is a magnetic rod in the middle, and the float is not made of imitation oxidation materials. Therefore, for a long time, or if the water is not changed frequently, the water level switch will be short-circuited, which will cause the phenomenon of not being able to humidify or humidifying all the time.

If you don't use pure water, after the water is used up, some ions in the water react with the air and the impurities in the water itself will damage the equipment. For example, in the case of hard water, after a long time, the water pipes inside will be blocked by calcium carbonate. (When hard water is boiled dry, calcium ions combine with carbon dioxide in the air to form calcium carbonate).

For most user units, tap water will be selected for the test water of the constant temperature and humidity test chamber, in fact, this can also be done, and it does not affect the temperature and humidity effect. However, if you use tap water for a long time, the water pipe will produce a lot of scale stains, and the impurities in the tap water will also adsorb to the surface of the product and affect the test results. It is recommended that users pay attention to frequent change and washing, then it is no problem to use tap water, if there is a condition, you can use purified water or distilled water.

After the above explanation, users need to pay attention to the water problem of the constant temperature and humidity test chamber, otherwise it will directly affect the test results and the service life of the equipment. Only by correctly following the water standards of the equipment can many disadvantages caused by water quality be avoided.

1.How should the test wire be placed in the equipment during the test? Arrange the samples that need to be used for the test neatly and unify the terminals.

Then connect it out through the test lead hole. If it is a cable to be connected, you need to prepare a flange to fix it and then process it. In case of through holes on both sides or non-standard requirements, it needs to be placed according to the drawings.

2.Does the water used in the test affect the test if it is not clean? There are impurities that will definitely have a certain impact.

If the water is not clean, it will not affect it for a short time. However, long-term use will cause scale in the water pipe, and its impurities are very likely to be adsorbed to the surface of the product, and the water tank will be unclean, and in serious cases, it will cause blockage. In general, it is recommended to use distilled or purified water in the test.

3.Is there a difference between using distilled water and deionized water? Distilled water refers to pure water extracted by distillation, and its purity will vary depending on the number of distillations and the substances added; Deionized water is pure water that has been removed in the form of ions by a specific method.

The two methods of water preparation are different, the components contained in the water are different, the cost of distilled water is higher than the cost of deionized water, and its purity is generally not as high as that of deionized water. Both types of water are widely used in industry, and the test data obtained is also accurate. The above are some common doubts about the constant temperature and humidity test chamber.