"self-weighing" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "self-",
        "3": "weighing"
      },
      "expansion": "self- + weighing",
      "name": "af"
    }
  ],
  "etymology_text": "From self- + weighing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "self-weighing (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with self-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "a self-weighing suitcase",
          "type": "example"
        },
        {
          "ref": "1959 September, P. Ransome-Wallis, “The British Railways Class \"9\" 2-10-0s”, in Trains Illustrated, page 425",
          "text": "It is probable that greater saving than this occurred in day-to-day service where men who were familiar with the Crosti engines did not over-fire them; so far as I know, however, a self-weighing tender has never been attached to one of these 2-10-0s.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "That weighs itself, or its load or contents."
      ],
      "id": "en-self-weighing-en-adj-3jEO88ER",
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "self-weighing"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "self-",
        "3": "weighing"
      },
      "expansion": "self- + weighing",
      "name": "af"
    }
  ],
  "etymology_text": "From self- + weighing.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "self-weighing (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms prefixed with self-",
        "English terms with quotations",
        "English terms with usage examples",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "text": "a self-weighing suitcase",
          "type": "example"
        },
        {
          "ref": "1959 September, P. Ransome-Wallis, “The British Railways Class \"9\" 2-10-0s”, in Trains Illustrated, page 425",
          "text": "It is probable that greater saving than this occurred in day-to-day service where men who were familiar with the Crosti engines did not over-fire them; so far as I know, however, a self-weighing tender has never been attached to one of these 2-10-0s.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "That weighs itself, or its load or contents."
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "self-weighing"
}