The long-term reliability test of glass glaze resistors first needs to be conducted under specific environmental conditions to ensure the consistency and comparability of the test. Common test environmental conditions include a temperature range of 15-35°C, a relative humidity of 45%-75%, and a specific air pressure range.
A common test method is to conduct a constant damp heat test, which is to place the resistor in an environment with constant temperature and humidity for a certain period of time (such as days or weeks) to evaluate its performance stability and reliability in this environment. This test helps to find resistance value drift or performance degradation caused by humidity changes.
Temperature cycle testing is also one of the important methods for evaluating the long-term reliability of glass glaze resistors. This test involves cycling the resistor between low temperature (around -55°C) and high temperature (around 155°C) to simulate the temperature changes that may be encountered in actual use. Through multiple cycle tests, the performance stability and durability of the resistor under temperature changes can be evaluated.
The withstand voltage test is used to evaluate the insulation performance and breakdown voltage of the resistor under high voltage. By applying a voltage higher than the normal operating voltage and observing whether the resistor breaks down or arcs, the reliability and safety of its insulation layer can be evaluated.
The terminal strength test is designed to evaluate the mechanical strength and durability of the resistor terminal. This usually involves applying a tensile force, bending force or torsion force to the terminal and observing whether the resistor is damaged or degraded.
In addition to the above test methods, an insulation resistance test can also be performed to evaluate the insulation performance of the resistor under specific conditions. This usually involves applying a DC voltage across the resistor and measuring its insulation resistance value.
The long-term reliability test methods of glass glaze resistors include constant humidity and heat test, temperature cycle test, withstand voltage test, terminal strength test and insulation resistance test. These test methods help to comprehensively evaluate the performance stability and reliability of the resistor, ensuring that it can meet the requirements of long-term stable operation in actual applications.
