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标题: How to Test Industrial Relay with Multimeter – A Step-by-Step Guide Industrial relays are essential components in electrical control systems, allowing circuits to be switched on and off by an external signal. Testing these relays is crucial to ensure their proper operation and to prevent unexpected failures in industrial machinery. One of the simplest and most effective tools for testing a relay is the multimeter. This guide provides a step-by-step approach on how to test an industrial relay with a multimeter, focusing on both the coil and the contacts. Step 1: Preparation and Safety