Temperature recorders have been widely used in many fields, especially in the occasions that directly require real-time recording of temperature and humidity changes in the whole process. PC analysis software carries out scientific and effective management, analysis and induction.
1. Application in testing and certification industry
With China's entry into the WTO, the country's requirements for the quality and safety of commodities are becoming more and more strict. If home appliances are to be circulated in the market, they must pass 3C certification. Therefore, major inspection bureaus or certification centers must conduct testing in accordance with national standards, and temperature rise testing is one of the more important ones. In the national standard GB4706.1-2005/IEC60335-1:2004, there are regulations on heat generation and winding temperature rise, such as "11.1 In normal practice, the appliance and its surrounding environment should not reach too high temperature;"
"In addition to the temperature rise of the winding insulation, the temperature rise of other electrical insulation is determined on the surface of its insulator, and its position is the position that may cause the following faults: 1. Short circuit; 2. Contact between live parts and accessible metal parts; 3 Jumper insulation; 4 Creepage distances or clearances reduced below specified values;”
"11.8 During the test, the temperature rise shall be continuously monitored, and the temperature rise shall not exceed the value indicated in the table."
The temperature recorder can record temperature changes for a long time, and can provide a reference for whether the mechanical and electrical products are abnormal during work. For example, washing machines, refrigerators, air conditioners, juicers, microwave ovens, etc. (of course, they each have their own standards), all need to do safety testing (temperature rise testing is a part of safety regulations). Generally speaking, most electrical appliances that generate heat when energized may need to undergo safety testing, which means that most electromechanical laboratories, or enterprises in related laboratories, may use temperature recorders.
2. Application in home appliance industry
In fact, this industry is directly related to the inspection or certification industry. There is an old saying: Knowing yourself and knowing your enemy is the only way you can fight a hundred battles without being imperiled. If home appliances are to be sent to the inspection bureau for testing, what method can be adopted to make the samples sent out for testing pass at one time? This can effectively save the cost and time generated by the detection. The best way is to do it in accordance with the standards of the testing bureau, one is to use the testing standards used by the testing bureau, and the other is to use the instruments used by the testing bureau.
3. Applications in the IT industry
IT is a turbulent industry, the fastest growing industry, an industry that has created countless myths, and an industry with the most numerous testing standards. If home appliances need to do temperature rise detection, then the IT industry must also need it. Because who can guarantee that a computer that works continuously for more than 10 hours will not cause safety problems due to heat? In addition, it is also necessary to monitor the temperature during the process of plate making and soldering the pins. As we all know, the high temperature of the CPU will cause the computer to crash. If the temperature is too high during the processing process, will it cause the processor to fail? There is no doubt about this, so whether it is plate making or the finished machine needs to be tested for temperature rise.
4. Application in food storage and transportation
Since the time of food storage and transportation is not a short-term problem, the relative equilibrium humidity in food storage is an important indicator to ensure food safety, and the relative equilibrium humidity directly affects the growth of colonies. For example: in the equilibrium relative humidity range of 95%RH to 91%RH, the colonies that are easy to breed are Salmonella, Bolint, lactic acid bacteria, mold and yeast. The shelf life of food is also related to temperature and equilibrium relative humidity. A cake with an equilibrium relative humidity of 81% RH has a shelf life of 14 days at 27°C and 24 days at 21°C. If the equilibrium relative humidity is increased to 85% RH, these The index will be reduced to 8 days at 27°C and 12 days at 21°C. The equilibrium relative humidity of the hygroscopic material plays a decisive role. Equilibrium relative humidity is defined as the humidity value obtained from the surrounding air without exchanging the substance with the water in the air. The definition is clear, and in order to successfully store and maintain these products, environmental climate control and packaging must be carefully specified. At the same time, the taste of many foods will deteriorate if they are stored too dry. In response to this situation, it is required to record temperature and humidity changes in real time to ensure that food safety enters the mouth of consumers.
When transporting frozen and refrigerated food over long distances or by sea, it is very important to prove that the goods have always been in the specified temperature and humidity conditions at the time of receipt. The way to resolve the dispute is to put a temperature recorder in the cargo hold when shipping, and start it, it will faithfully record the temperature and humidity changes throughout the transportation process, and the carrier will immediately know whether it is responsible. At present, well-known fast food companies such as KFC are using temperature recorders.
5. Application in vaccine cold chain
During the cold chain storage and transportation of vaccines, bacterins and other biological products from the finished product warehouse of the pharmaceutical factory to the cold chain storage and transportation of the relevant population, the monitoring records of the environmental temperature can confirm their quality and ensure the effect of immunization. The temperature recorder solves this problem conveniently and reliably.
Different vaccines and bacterins have different requirements for storage and transportation ambient temperature. To ensure the safety of bacteria and vaccines during storage and transportation, it is necessary to record the entire process of the environmental temperature during storage and transportation, and it should be a fully automatic detection record, and there should be no human factors to improve the data. reliability. A high-quality and high-precision temperature recorder can perfectly accomplish this function, because it can record for a long time without external power supply.
6. Application in the management of museum cultural relics and archives
This is another area of application for temperature and humidity loggers. The paper of the archives can be stored for a longer period of time under suitable conditions of temperature and humidity. Once the temperature and humidity conditions are damaged, the paper will become brittle, and the important information will be gone. It is necessary to record the temperature and humidity in the archives. Prevent bad accidents from happening. The use of temperature and humidity recorders will simplify the work of temperature and humidity recording, and will also save the cost of cultural relics storage, so that this work can be scientific, and will not be disturbed by too many human factors.
7. Application in building materials experiment
In the drying process of building materials, especially concrete, we should pay attention to its drying trend, which is one of the indicators for evaluating products, and also provides reliable data for construction parties. The application of the temperature and humidity recorder can record this data and provide it to the building materials research party, which will provide useful assistance for construction. Especially in military buildings, time is life. Accurately grasping the drying time of concrete is the first move to attack the enemy, and it provides a guarantee for effectively providing living force to the battlefield. This function can be completed by a temperature recorder.
8. Application in agriculture and animal husbandry
Agricultural and animal husbandry production, especially the production of some cash crops, should record the temperature and humidity values in detail during the seedling stage. For example, it is necessary to determine the relationship between the growth characteristics of some seedlings and temperature and humidity. Of course, not every seedling needs temperature monitoring, after all, forestry is a relatively rough production mode.
9. Application in building acceptance
Mainly reflected in the acceptance of intelligent buildings. Due to the large number of acceptance projects in the construction industry, in addition to HVAC indicators, other construction departments such as ray intensity, formaldehyde concentration and other indicators that meet human health requirements should also be monitored. These indicators are directly related to human health. If the testers rashly enter these places and record there for a long time when these indicators are not clear, it is irresponsible for the testers' personal health, and the application of the recorder will ensure that reliable data is obtained while the test is accurate. The personal safety of personnel should be protected to the greatest extent. Of course, all the above-mentioned quantities should be converted into voltage quantities for measurement during measurement.
10. Application in important medical and health facilities
According to the requirements of the "Draft for Comments on the Construction Technical Specifications of the Hospital Clean Operating Department", the temperature and humidity of the operating room must be controlled within a certain range: that is, the temperature is 22...25℃; the relative humidity is 45%RH...60%RH. Appropriate ambient temperature and humidity are very important for both the operator and the patient. When the room temperature exceeds 28°C and the humidity exceeds 70%RH, it is easy to have reactions such as stuffy heat, sweating, irritability, fatigue, etc., which can easily affect the stable mood and agile thinking, so that the operator's technical level cannot be well used. At the same time, the patient will also have symptoms such as rapid heart rate and sweating, which will increase the difficulty of the operation; when the room temperature is lower than 20 degrees, the operator who only wears the surgical gown will feel cold, which will easily affect the sensitivity and accuracy of the operation, especially The subtle movements of the fingers. Naked patients are more prone to complications such as colds due to the low level of body resistance due to trauma. The indoor humidity is low, and the dust on the surface of the object is suspended in the air due to changes in airflow caused by certain actions, such as laying out sheets, opening and closing doors, etc. The temperature difference between the inside and outside of the operating room is large, and the air in some areas after the door is opened forms a vortex flow, and the wind speed increases to about 4 times the original wind speed in the operating room. According to the US CDC survey, when the number of planktonic bacteria in the air of the operating room is 700-800cfu/m3, there is a risk of air infection. It can be seen from the results that the air pollution is the most serious during the operation and 2 hours after the operation, which is the operation stage. Due to the effect of gravity, indoor floating dust can directly settle on the surgical wound, or on the operator's hands or surgical instruments. Therefore, it is important to strengthen the control of air pollution during this period to prevent postoperative incision infection. These require the health and epidemic prevention departments to confirm the compliance of the operating rooms of each hospital through their own monitoring. The recorder is a good method, which reduces the waste of personnel and ensures the fairness of law enforcement.
Attachment: Introduction of temperature recorder
Temperature and humidity measurement is a newly developed field of modern measurement, especially the measurement of humidity is constantly advancing. It has gone through the process of length method, dry and wet method until today's electrical measurement, so that the humidity measurement technology is becoming more and more mature. Today, because we are no longer satisfied with the measurement of temperature and humidity, especially the monitoring of some places directly requires real-time recording of temperature and humidity changes in the whole process, and based on these changes to determine the safety of the storage and transportation process, resulting in new temperature and humidity. Measuring instrument - the birth of temperature and humidity recorder.
Temperature and humidity loggers
It is to measure the temperature and humidity parameters and store them in the internal memory according to a predetermined time interval. When recording, you can timely observe the temperature change trend or make an analysis and summary of the overall temperature change after the measurement is completed. Of course, with the development of computer technology, the recorder can also be connected to a PC, and the software can be used to complete its extended functions. Using this instrument, it can be determined that there is no incident that endangers product safety in the storage and transportation process, experimental process and other related processes.
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