The environmental impact on the probe connector
At present, high temperature resistance-the maximum working temperature of the connector is 200℃, and the minimum working temperature is -65℃. Since the current generates heat at the contact point when the connector is working, causing the temperature to rise, it is generally believed that the working temperature should be equal to the sum of the ambient temperature and the contact temperature rise. In some specifications, the maximum allowable temperature rise of the connector under the rated operating current is clearly specified.
Moisture resistance-the intrusion of moisture will affect the insulation performance of the joint and corrode metal parts. Constant humidity and heat test conditions are relative humidity 90%~95%, temperature 40±20℃, test time, according to product regulations, at least 96 hours. The alternate damp heat test is more stringent.
When salt spray resistance-when the connector is working in an environment containing moisture and salt, electrochemical corrosion may occur on the surface treatment layer of the metal structure and the contact, which affects the physical and electrical properties of the connector. In order to assess whether the capability of the electrical connector can withstand this environment, a salt spray test is specified. It hangs the connector in a temperature-controlled test box, and sprays a sodium chloride solution of a specified concentration with compressed air to form a salt spray environment. The exposure time is at least 48 hours specified by the product specifications.
Vibration and shock-vibration and shock resistance are important properties of electrical connectors, especially in special application environments such as aerospace, railway and road transportation. It is an important indicator for testing the robustness of the mechanical structure of the electrical connector and the reliability of the electrical contact. The relevant test methods are clearly defined. The shock test shall specify that the peak value is acceleration, the duration is time, and the electrical continuity of the shock pulse waveform and time is interrupted.