Cause: Water and dust enter the connector port, which reduces the insulation resistance between cores and between core and shell.
Solution: Disassemble the connector, clean the internal dirt with anhydrous ethanol and dry it completely before reassembly.
Cause: Long-term use in high temperature/humid environment causes aging and hardening of the insulating rubber shell, resulting in attenuation of insulation performance.
Solution: Replace the aged and damaged rubber shell with original factory accessories to restore the insulation performance of the connector.
Cause: The cable insulation layer is damaged during wiring, leading to micro short circuit and sharp drop of insulation performance.
Solution: Replace the damaged cable, rewire and ensure the insulation layer is intact, and do a good job of sealing and protection after wiring.
Technical Note: Regularly test the insulation resistance of M9 connectors in harsh environments (≥100MΩ@500V DC is normal); standardize wiring operation and do a good job of on-site sealing and dustproof/waterproof to effectively prevent insulation performance degradation.
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