Precautions and installation and debugging methods of constant temperature and humidity test chamber in test
Precautions for constant temperature and humidity test chamber in the test
When the constant temperature and humidity test chamber is turned on, the common problem is that after the temperature of the studio exceeds the set temperature by more than 3 °C, it will slowly decrease and stabilize at the set temperature. Today we are going to tell you this phenomenon. It is a normal warming phenomenon. It is consistent with the corresponding temperature deviation requirement of ±2 °C or the overshoot of the test chamber is required to be proportional to the temperature value of the test point. For example, the temperature overshoot of O-100 °C does not exceed 2 °C, and the overshoot of 100 °C or more does not exceed the test. 2% of the point.
In the constant temperature and humidity test chamber, due to the need for more products to be tested, we may open the door to place or take the test item at half the test. How does this practice affect the test and the operator itself? For everyone to explain the situation that will open the door, as shown below.
One: may cause burns or pressure overshoot leading to uncomfortable human body;
Two: Opening the door in the middle will cause the temperature and humidity of the box to change, so that the uniformity of the box has large fluctuations, which affects the smooth progress of the test.
Conversely, if the constant temperature and humidity test chamber must open the door during the test, the following method can also be used. Install two doors, the door is an external door, insulated, sealed, with observation window, the other door is made of epoxy board or transparent hard plastic board, and the size is opened in the middle of the door.
The suitable hole is convenient for taking the sample, so that the product is effectively insulated from direct exposure to the air, and the uniformity is not spread.
The constant temperature and humidity test chamber is different:
The constant temperature and humidity test chamber is suitable for the quality inspection of electronic, plastic products, electrical appliances, instruments, food, vehicles, metals, chemicals, building materials, aerospace, medical...
The constant temperature and humidity test chamber tests the heat resistance, cold resistance, dry resistance and moisture resistance of various materials. The Chinese or English LCD touch screen can be selected for easy operation, easy program editing and user-friendly design. It displays complete system operating status related data, execution and setting program curves. An abnormal situation occurs during operation, and the screen automatically alarms to show the cause of the failure and provide troubleshooting methods.
Intelligent test product safety protection measures: When the air component breaks down, the temperature is not controlled and continues to rise, which poses a major threat to the safety of the test sample, especially the valuable test article will cause irreparable damage. In addition to the traditional over-temperature protection function, the protection function for the sample is specially designed. When the measured temperature is higher than the set temperature by 5 °C, the main power supply of the heating circuit is cut off, and the temperature is locked, thereby protecting the sample.
The constant temperature and humidity test box fault graphic shows that when the equipment is over pressure, over current, water shortage, etc., the temperature and humidity controller will pop up the corresponding prompt screen and issue a fault prompt tone, prompting the customer to perform corresponding processing, which is very intuitive.
Interpretation of the quality of the constant temperature and humidity test machine
As the industrial development is getting faster and faster, the product application field is more and more extensive, and the environmental damage caused by the product is also increasing. Therefore, the constant temperature and humidity testing machine industry equipment has been applied in various industries and directly to the technology industry, especially In production and R&D, it plays a supporting role that cannot be replaced by other industries, and exerts a radiation impact on product quality and application.
The contents of the after-sales plan include the content, form, time, response time, time to solve the problem, quality assurance measures, etc., and make the following commitments:
Since the receiving period of the constant temperature and humidity testing machine, our company guarantees the maintenance and maintenance of the constant temperature and humidity testing machine for one year. During the warranty period, in case of equipment quality problems, our company is responsible for free maintenance and replacement of parts, without any cost to the customer. . Respond within fifteen minutes, for the specific use of customers, our company provides free training, such as operation training, simple troubleshooting, and in-depth technical development, to ensure that equipment users can master the use of technology. The after-sales department returns once every three months. Our technical consultants are always available to answer customer questions and technical guidance on technical and standard specifications. Outside the warranty period, the whole machine lifetime warranty, if you need to replace parts, only the market cost price of replacement parts.
How does the constant temperature and humidity test chamber affect our lives?
The constant temperature and humidity test chamber is used to test the performance of materials in various environments and to test various materials for heat resistance, cold resistance, dry resistance and moisture resistance. Suitable for the quality of electronic, electrical, communications, instrumentation, vehicles, plastic products, metals, food, chemicals, building materials, medical, aerospace and other products. The following small series tells you how the constant temperature and humidity test chamber affects our lives.
The mobile phones, tablets, LED lights, etc. in life all need constant temperature and humidity test chambers to detect. Below we take LED lights to introduce. With the development of the economy, we use the lamps from the previous bulbs to the energy-saving lamps. Deeper to the LED lights, more importantly, the LED lights have to save more than 80% of the previous lamps, which leads to more and more use. Extending the service life of LED lamps has become the goal of many manufacturers to make unremitting efforts. The constant temperature and humidity test chamber is one of the better devices for checking LEDs.
Detailed control system of constant temperature and humidity test chamber
The constant temperature and humidity test chamber is suitable for aerospace products, information electronic instruments , materials, electrical, electronic products, various electronic components in the hot and humid environment, to test their performance indicators. The balanced temperature and humidity control system (BTHC) is used to control the SSR in the PID mode, so that the heating and humidifying amount of the system is equal to the heat and moisture loss, so it can be used stably for a long time.
Constant temperature and humidity test chamber controller original Korea imported, Chinese and English LCD display LCD touch panel, screen interactive input data, temperature and humidity can be programmed at the same time, backlight 17 adjustable, curve display, set value / display value curve . Multiple alarms can be displayed separately. When a fault occurs, the fault can be displayed on the screen to eliminate the fault and eliminate the misoperation. Multiple sets of PID control functions, precise monitoring functions, and displayed on the screen in data form.
1. Power-saving mode: Microcomputer servo control of refrigerant flow, effectively reducing the mutual heat and heat consumption, saving more than 20% of electricity.
2. Full color 5.7-inch LED touch screen.
3. Controller interface user-friendly style design, more convenient operation and more reliable operation.
4. Constant temperature and humidity test box controller backlight protection 0~99 points can be set, enter with the password.
5. Easy operation mode, it can be operated with simple power-on settings.
6. Appointment start setting, operation expected end time indication, power-on time integration, program end planning (program connection, transfer to fixed value, shutdown, etc.).
7. Large program capacity: 100 groups of programs, a total of 1000 segments of memory preservation.
8. Ultra-long cycle setting: large cycle: 32000 times, partial cycle; 32000 times, memory and storage.
9. Constant temperature and humidity test chamber long setting time setting: 1 minute ~ 999999 H 59 M setting.
Constant temperature and humidity test box installation and debugging method
After the company purchases the constant temperature and humidity test chamber, it will arrange the commissioning personnel to deliver the goods, and provide on-site operation instructions (this delivery and on-site guidance are free of charge), in order to better operate the constant temperature and humidity test chamber, we We have prepared a method for installation and commissioning of the constant temperature and humidity test chamber. When you are studying on site, combining the following materials with on-site learning will help you to operate better.
In order to facilitate the heat dissipation and maintenance of the cabinet, the place where the equipment is installed must meet the following conditions:
1. Distance between adjacent walls or objects is 300mm
2. In order to stably play the function and performance of the test box, the place where the annual temperature is 15~35°C and the relative humidity is more than 85% should be selected.
3. The ambient temperature of the installation site should not be changed drastically.
4. It should be installed on the horizontal surface (the level is confirmed on the ground when installing the level).
5, should be installed in places without direct sunlight.
6, should be installed in a well-ventilated place.
7. It should be installed away from combustibles, explosives and high temperature heat sources.
8, should be installed in places with less dust.
9. Install as close as possible to the power supply.
Remarks: (To avoid machine failure in the constant temperature and humidity test chamber, please provide power supply within the rated voltage range. In order to prevent electric shock or malfunction and malfunction, please do not turn on the power before installation and wiring are finished.)
Analysis of three major factors leading to the damage of constant temperature and humidity testing machine
There are three factors that cause damage to the constant temperature and humidity tester. Specifically, it includes light, high temperature, and humidity. These three factors are crucial to the impact of the product equipment, and any one of them can quickly shorten the service life of the constant temperature and humidity tester.
1. Illumination factors: The structural composition of different products of constant temperature and humidity testing machine also has different intensity of illumination. For example, those durable materials, such as plastics, paints, etc., meet the light and do not cause serious aging. So analyze the material composition of the product equipment.
2. High temperature factor: When the ambient temperature rises due to high temperature, it will increase the intensity and damage of light. There is no direct chemical reaction between temperature and light, but there is a subtle correlation between them. Therefore, when testing the constant temperature and humidity test chamber products, it is necessary to grasp the precise temperature range.
3. Moisture factors: In general, some moisture, rain, dew, etc. are the factors that cause moisture. The dew formed by moisture is the main factor of outdoor humidity. The damage caused by dew is greater than that of rain because it is attached to The material lasts longer and causes more severe moisture absorption. If the wood coating is rinsed with rain to remove the surface aging layer, the unaged inner layer is exposed to sunlight, resulting in further aging.
The above three reasons for the damage caused by the constant temperature and humidity test machine, know these factors, will greatly help you to maintain and maintain the test machine, I hope the test machine can extend the service life as much as possible.
Analysis on the requirements of water for constant temperature and humidity test chamber
With the development of modern agriculture and the development of industrial products in China, the application of constant temperature and humidity test chambers is more and more extensive, and the requirements for production and scientific research are getting higher and higher. It requires higher performance and price ratio, longer life, less cost (power saving), and faster response. The following small series will take you to understand the water requirements of the constant temperature and humidity test chamber during the test.
The constant temperature and humidity test chamber requires a water resistance of more than 500 ohms, because the higher the resistivity, the better the insulation of the water (the reciprocal of the resistivity is the conductivity, the smaller the conductivity, the better). Then you use the constant temperature and humidity test. The box is typically humidified with a pulse (sound wave) and the humidifying medium is water. Why is it humidified with water? Because the particles are humidified with water, if the humidity is required for a long time, it will affect the service life of the humidity sensor. (Humidity sensor: generally divided into capacitive sensor, Honeyfair sensor), but their PCBs have some lines. Made of water-repellent material or anti-oxidation material. If the water quality is poor, the humidity sensor will be short-circuited. When testing in a constant temperature and humidity test chamber, you should not use tap water, but use the pure water we usually drink.
Describe the perfect design structure system of constant temperature and humidity test chamber
With the continuous advancement and development of science and technology, mechanical equipment such as constant temperature and humidity test chambers are developing towards automation and versatility. In the future, while work efficiency continues to increase, human participation will be less and less. However, users should choose high-quality test equipment when facing many manufacturers. The following small series will take you to understand the perfect design structure of our constant temperature and humidity test chamber to meet the needs and capabilities of users.
1. Chinese and English operation interface switching: Provide Chinese and English operation interface switching, which is convenient for users with different speech backgrounds.
2. Constant temperature and humidity test box intelligent power supply interruption management: sudden power failure during the test, and then call again, the test can continue from the breakpoint until the completion of the remaining tests, do not have to come back to ensure the continuity of the test.
3. Large-capacity program preset: program capacity, each program can be programmed with 99 segments. Programs can also be connected in series. Internal loops and all loops can be set internally. Various complicated test programs can be programmed to meet different test requirements.
4. High-precision mature control technology: The equipment adopts dynamic PID control, balance temperature adjustment and humidity control, humidity control is water vapor partial pressure control, and the control precision is extremely high.
5. Sensor segmentation calibration: In the traditional instrument calibration, due to the incomplete linearity of the sensor, the high temperature is often observed, the low temperature is not accurate, the low temperature is calibrated, and the high temperature is affected. It is difficult to balance. The controller provides four-stage calibration. Function, high, medium and low temperature independent calibration, do not affect each other.
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