What should be paid attention to when using electronic scale

What should be paid attention to when using the hanging hook of the electronic crane scale? Under what circumstances should the hanging hook of the electronic crane scale be updated
        When hoisting heavy objects in factories, it is necessary to use the electronic scale hook, may I ask: what should be paid attention to when using the electronic scale hookItem? Under what circumstances does the hanging hook of the electronic crane scale need to be updated?
        The points to note when using the scale hook are:
        1. The surface of the hook and ring of the electronic crane scale should be smooth and clean. After 1 ~ 3 years of use, an inspection should be conducted.
        2. When it is found that the wear height of the hook on the dangerous section of the electronic crane scale exceeds 10%, the load should be reduced to use.
        Load test of the hook of the electronic crane scale: use the weight of 125% of the rated weight, hang for 10min, and then unload, measure the hook, if there is permanent deformation or crack, it should be updated or reduced the load use.
        The crane hook of the electronic crane scale needs to be updated when one of the following situations occurs:
        1. Observe the surface with a 20x magnifying glass, with cracks, cracks or hair lines.
         2. The dangerous cross section of the hook of the electronic scale is more than 10% worn.
         3. Permanent deformation occurs during load test.
         4 hook tail and thread deformation and crack.
         5. Fatigue crack at the transition corner of the threaded part and unthreaded part of hook tail.