PCB substrates are an important part of electronic products, and electronic products will face various environmental conditions during use, including high temperature, low temperature, humidity, etc. These environmental conditions may have adverse effects on the performance and reliability of PCB substrates. Therefore, in order to ensure that the PCB substrate can work normally under various environmental conditions, high-low temperature resistance tests are required to test the tolerance of the PCB substrate by simulating the use in extreme environments, thereby ensuring its reliability in actual use. sex and stability.
experiment method
The high-low Temperature Test Chamber can be used in the PCB (Printed Circuit Board) substrate high-low temperature resistance test to test the performance and reliability of the PCB substrate under different temperature environments. The following are the test steps of the high-low Temperature Test Chamber in the PCB substrate high-low temperature resistance test:
Preparation: Check whether the Test Chamber and temperature controller are working normally, and set the temperature range and heating and cooling rate of the Test Chamber according to the test requirements. Prepare the PCB substrate and pay attention to its size and position.
Sample installation: Install the PCB substrate to be tested in the test box, and pay attention to its position and direction, so as to ensure the accuracy of the test results.
Test operation: Turn on the Test Chamber and temperature controller, and set the temperature range and heating and cooling rate of the Test Chamber. Raise the temperature of the Test Chamber to the set temperature range, keep it for a period of time, and then cool down to the set temperature. During the test, record the temperature change inside the test box, and pay attention to observe the performance change of the PCB substrate.
Evaluation of test results: After the test, take out the PCB substrate and observe whether its appearance and function are changed or damaged. At the same time, conduct electrical performance testing and evaluation, including testing of parameters such as resistance, capacitance, and inductance. Through the evaluation of the test results, the tolerance and stability of the PCB substrate in high-low temperature environments can be judged.
Beichao reminds you: Before the test, the PCB substrate should be inspected and tested to ensure its normal operation. During the test, the temperature range and heating and cooling rate inside the Test Chamber should be strictly controlled to ensure the accuracy and reliability of the test. At the same time, the Test Chamber should be cleaned and maintained after the test to prolong its service life.
