"check scale" meaning in English

{
  "forms": [
    {
      "form": "check scales",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "check scale (plural check scales)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A scale used in a filling operation to indicate the proper filling level has been reached."
      ],
      "id": "en-check_scale-en-noun-ttNkzB7g",
      "synonyms": [
        {
          "word": "checkweigher"
        },
        {
          "word": "dynamic scale"
        },
        {
          "word": "in-motion scale"
        },
        {
          "word": "conveyor scale"
        }
      ],
      "wikipedia": [
        "check scale"
      ]
    }
  ],
  "word": "check scale"
}

{
  "forms": [
    {
      "form": "check scales",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "check scale (plural check scales)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns"
      ],
      "glosses": [
        "A scale used in a filling operation to indicate the proper filling level has been reached."
      ],
      "wikipedia": [
        "check scale"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "checkweigher"
    },
    {
      "word": "dynamic scale"
    },
    {
      "word": "in-motion scale"
    },
    {
      "word": "conveyor scale"
    }
  ],
  "word": "check scale"
}