Aging test and environmental test method for instrumentation
The production of many enterprises is inseparable from the help of the instrument, but after the instrument is used for a certain period of time, the product will age. Therefore, it is necessary to carry out aging test and environmental test, which can detect a potential failure of early equipment, especially common faults that can be found, so the same equipment can be restored by modifying the circuit and method in the early stage, which helps to improve the durability of the equipment sturdiness and reliability. Next, Shanghai Qianshi will introduce the aging test and environmental test methods of instruments and meters. What is the aging test of the instrument? During the general aging test, some instruments and meters are continuously powered on for a long time, and their average trouble-free working time is measured, and the fault characteristics of these instruments and meters are analyzed and summarized, and their common problems are found and solved. this“lasts a long time”How long is it? Generally 24 hours or 48 hours, of course, it can be 1 hour or 0 hours, which is the pursuit of quality and cost requirements. Aging test, also known as roasting machine or burning machine, is to test it harshly or“try to burn it”It means that only those products that have been tortured and survived are excellent products, and reputable companies will only sell these to users. Every equipment of our Wuhan Guoliang Instrument has undergone an extremely strict aging test process, so as to ensure that the equipment reaching the user's hands is of extremely high quality. What is the environmental test of the instrument? Generally speaking, the environmental test is to determine the specific test content according to the working environment of the instrument, and conduct the test according to the method specified by the state. Environmental tests are generally only carried out on product samples. The common environmental test contents and methods are as follows: (1) Temperature test The temperature test is used to check the influence of the temperature environment on the instruments, and to determine the adaptability of the instruments to work and store under high temperature and low temperature conditions. It includes high temperature and low temperature load test, high temperature and low temperature storage test. The high temperature test is used to check the influence of the high temperature environment on the instruments and meters, and to determine the adaptability of the instruments and meters to work and store under high temperature conditions. It includes high temperature load test and high temperature storage test. The low temperature test is used to check the influence of the low temperature environment on the instruments and meters, and to determine the adaptability of the instruments and meters to work and store under high temperature conditions. It includes low temperature load test and low temperature storage test. The temperature load test is to put the instrument into the temperature test box under the condition of no packaging, no electricity and normal working position, and carry out the test of the upper and lower working temperature of the rated use. (2) Vibration and shock test Vibration test checks the stability of the instrument to withstand vibration. The method is to fix the sample on the vibrating table, and conduct the test by simulating various vibration environments such as fixed frequency (50HZ) and variable frequency (5-2KHZ). After a cycle is completed within a certain frequency range, the inspection shall be carried out according to the regulations. For example, the SF6 gas trace moisture analyzer must avoid vibration and shock. The experiment proves that the SF6 gas trace moisture analyzer cannot work because the polymer film capacitive humidity sensor is easily damaged by shock. The impact test is used to check the adaptability of instruments to withstand non-repetitive mechanical shocks. The method is to fix the sample instrument or instrument on the test bench with a certain acceleration and frequency, and impact the sample several times in different directions respectively. After the impact test, check whether the main technical indicators still meet the requirements and whether there is any mechanical damage. (3) Transportation test The transportation test is to check the packaging, storage and transportation capacity of the instrument. Method The sample is fixed on the test bench, and can also be installed on a truck to run. The specific method is in accordance with the relevant standards. The transportation test is based on the main technical indicators and performance of the specified detector. All in all, both the burn-in test and the environmental test are to check the reliability of the product. Generally, after the processing process, there will be aging tests and environmental tests for circuit boards and components.
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