{
  "schema": "conditional-full-tracing-chart-v1",
  "title": "Complete conditional graphical loss and tracer-delivery companion",
  "units": {
    "temperature_difference": "degF",
    "ordinate": "Btu/(h ft)",
    "pipe": "nominal inches",
    "tracer": "outside diameter inches"
  },
  "axis_domains": {
    "loss_deltaT_F": [
      0,
      500
    ],
    "delivery_deltaT_F": [
      0,
      350
    ],
    "ordinate": [
      0,
      400
    ]
  },
  "curves": [
    {
      "id": "pipe-1",
      "panel": "loss",
      "label": "NPS 1 in",
      "trace_domain_deltaT_F": [
        25,
        500
      ],
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        {
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          "q_Btu_h_ft": 5,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 5,
          "display_representative_Btu_h_ft": 5
        },
        {
          "deltaT_F": 35,
          "q_Btu_h_ft": 5,
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          "raw_graphical_reading_Btu_h_ft": 5,
          "display_representative_Btu_h_ft": 5
        },
        {
          "deltaT_F": 45,
          "q_Btu_h_ft": 5,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 5,
          "display_representative_Btu_h_ft": 5
        },
        {
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          "q_Btu_h_ft": 5,
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          "raw_graphical_reading_Btu_h_ft": 5,
          "display_representative_Btu_h_ft": 5
        },
        {
          "deltaT_F": 65,
          "q_Btu_h_ft": 10,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 10,
          "display_representative_Btu_h_ft": 10
        },
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 10,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 10,
          "display_representative_Btu_h_ft": 10
        },
        {
          "deltaT_F": 85,
          "q_Btu_h_ft": 10,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 10,
          "display_representative_Btu_h_ft": 10
        },
        {
          "deltaT_F": 95,
          "q_Btu_h_ft": 15,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 15,
          "display_representative_Btu_h_ft": 15
        },
        {
          "deltaT_F": 105,
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          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 15,
          "display_representative_Btu_h_ft": 15
        },
        {
          "deltaT_F": 115,
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          "display_representative_Btu_h_ft": 15
        },
        {
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          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 135,
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          "display_representative_Btu_h_ft": 20
        },
        {
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          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 155,
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          "reading_allowance_Btu_h_ft": 5,
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          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 165,
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          "reading_allowance_Btu_h_ft": 5,
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        },
        {
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        },
        {
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        },
        {
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        },
        {
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        },
        {
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        },
        {
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        },
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        },
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        },
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        {
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        },
        {
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        {
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        {
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        },
        {
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        },
        {
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        },
        {
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        {
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        {
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        }
      ],
      "original_visible_limit": {
        "type": "right-axis limit500",
        "deltaT_F": 500,
        "q_Btu_h_ft": 99.8,
        "working_endpoint_allowance_F": 0
      },
      "terminal_point_pixel": [
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        1341.91
      ],
      "terminal_recovery_method": "direct source boundary reading",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "pipe-1.5",
      "panel": "loss",
      "label": "NPS 1.5 in",
      "trace_domain_deltaT_F": [
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      ],
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          "raw_graphical_reading_Btu_h_ft": 380,
          "display_representative_Btu_h_ft": 380
        },
        {
          "deltaT_F": 285.23,
          "q_Btu_h_ft": 400,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 400,
          "display_representative_Btu_h_ft": 400
        }
      ],
      "original_visible_limit": {
        "type": "ordinate clipped at400",
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        "q_Btu_h_ft": 400,
        "working_endpoint_allowance_F": 3
      },
      "terminal_point_pixel": [
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        203.59
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      "terminal_recovery_method": "Observed local ink at390/395Btu intersected with chart400Btu frame; frame endpoint is not guide-polynomial endpoint",
      "axis_clipping": "400 Btu/(h ft)"
    },
    {
      "id": "tube-3/8",
      "panel": "delivery",
      "label": "ordinary 3/8 in OD",
      "trace_domain_deltaT_F": [
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        350
      ],
      "points": [
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 10,
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        {
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          "display_representative_Btu_h_ft": 10
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        {
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          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
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        {
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          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 115,
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          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
        },
        {
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          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 135,
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          "raw_graphical_reading_Btu_h_ft": 20,
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        {
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          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 155,
          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 165,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 30,
          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 175,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 30,
          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 185,
          "q_Btu_h_ft": 35,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 35,
          "display_representative_Btu_h_ft": 35
        },
        {
          "deltaT_F": 195,
          "q_Btu_h_ft": 35,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 35,
          "display_representative_Btu_h_ft": 35
        },
        {
          "deltaT_F": 205,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 215,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 225,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 235,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 245,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 255,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 265,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 275,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 285,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 295,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 305,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 315,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 325,
          "q_Btu_h_ft": 70,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 70,
          "display_representative_Btu_h_ft": 70
        },
        {
          "deltaT_F": 335,
          "q_Btu_h_ft": 70,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 70,
          "display_representative_Btu_h_ft": 70
        },
        {
          "deltaT_F": 345,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 350,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 350,
        "q_Btu_h_ft": 76.9,
        "working_endpoint_allowance_F": 0
      },
      "terminal_point_pixel": [
        2987.04,
        1407.7
      ],
      "terminal_recovery_method": "Local observed343/348F ink trace intersected with350F frame; avoids vertical frame contamination",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "tube-1/2",
      "panel": "delivery",
      "label": "ordinary 1/2 in OD",
      "trace_domain_deltaT_F": [
        75,
        350
      ],
      "points": [
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 15,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 15,
          "display_representative_Btu_h_ft": 15
        },
        {
          "deltaT_F": 85,
          "q_Btu_h_ft": 15,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 15,
          "display_representative_Btu_h_ft": 15
        },
        {
          "deltaT_F": 95,
          "q_Btu_h_ft": 20,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 105,
          "q_Btu_h_ft": 20,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 115,
          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 125,
          "q_Btu_h_ft": 25,
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          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 135,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
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          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 145,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 30,
          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 155,
          "q_Btu_h_ft": 35,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 35,
          "display_representative_Btu_h_ft": 35
        },
        {
          "deltaT_F": 165,
          "q_Btu_h_ft": 35,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 35,
          "display_representative_Btu_h_ft": 35
        },
        {
          "deltaT_F": 175,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 185,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 195,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 205,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 215,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 225,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 235,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 245,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 255,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 265,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 275,
          "q_Btu_h_ft": 70,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 70,
          "display_representative_Btu_h_ft": 70
        },
        {
          "deltaT_F": 285,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 295,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 305,
          "q_Btu_h_ft": 80,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 80,
          "display_representative_Btu_h_ft": 80
        },
        {
          "deltaT_F": 315,
          "q_Btu_h_ft": 85,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 85,
          "display_representative_Btu_h_ft": 85
        },
        {
          "deltaT_F": 325,
          "q_Btu_h_ft": 85,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 85,
          "display_representative_Btu_h_ft": 85
        },
        {
          "deltaT_F": 335,
          "q_Btu_h_ft": 90,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 90,
          "display_representative_Btu_h_ft": 90
        },
        {
          "deltaT_F": 345,
          "q_Btu_h_ft": 95,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 95,
          "display_representative_Btu_h_ft": 95
        },
        {
          "deltaT_F": 350,
          "q_Btu_h_ft": 95,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 95,
          "display_representative_Btu_h_ft": 95
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 350,
        "q_Btu_h_ft": 95.1,
        "working_endpoint_allowance_F": 0
      },
      "terminal_point_pixel": [
        2986.81,
        1338.27
      ],
      "terminal_recovery_method": "Local observed343/348F ink trace intersected with350F frame; avoids vertical frame contamination",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "tube-3/4",
      "panel": "delivery",
      "label": "ordinary 3/4 in OD",
      "trace_domain_deltaT_F": [
        75,
        350
      ],
      "points": [
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 20,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 85,
          "q_Btu_h_ft": 20,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 20,
          "display_representative_Btu_h_ft": 20
        },
        {
          "deltaT_F": 95,
          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 105,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 30,
          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 115,
          "q_Btu_h_ft": 30,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 30,
          "display_representative_Btu_h_ft": 30
        },
        {
          "deltaT_F": 125,
          "q_Btu_h_ft": 35,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 35,
          "display_representative_Btu_h_ft": 35
        },
        {
          "deltaT_F": 135,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 145,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 155,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 165,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 175,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 185,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 195,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 205,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 215,
          "q_Btu_h_ft": 70,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 70,
          "display_representative_Btu_h_ft": 70
        },
        {
          "deltaT_F": 225,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 235,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 245,
          "q_Btu_h_ft": 80,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 80,
          "display_representative_Btu_h_ft": 80
        },
        {
          "deltaT_F": 255,
          "q_Btu_h_ft": 85,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 85,
          "display_representative_Btu_h_ft": 85
        },
        {
          "deltaT_F": 265,
          "q_Btu_h_ft": 90,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 90,
          "display_representative_Btu_h_ft": 90
        },
        {
          "deltaT_F": 275,
          "q_Btu_h_ft": 95,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 95,
          "display_representative_Btu_h_ft": 95
        },
        {
          "deltaT_F": 285,
          "q_Btu_h_ft": 100,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 100,
          "display_representative_Btu_h_ft": 100
        },
        {
          "deltaT_F": 295,
          "q_Btu_h_ft": 100,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 100,
          "display_representative_Btu_h_ft": 100
        },
        {
          "deltaT_F": 305,
          "q_Btu_h_ft": 105,
          "reading_allowance_Btu_h_ft": 5,
          "raw_graphical_reading_Btu_h_ft": 105,
          "display_representative_Btu_h_ft": 105
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          "display_representative_Btu_h_ft": 195
        },
        {
          "deltaT_F": 285,
          "q_Btu_h_ft": 205,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 205,
          "display_representative_Btu_h_ft": 205
        },
        {
          "deltaT_F": 295,
          "q_Btu_h_ft": 215,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 215,
          "display_representative_Btu_h_ft": 215
        },
        {
          "deltaT_F": 305,
          "q_Btu_h_ft": 220,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 220,
          "display_representative_Btu_h_ft": 220
        },
        {
          "deltaT_F": 315,
          "q_Btu_h_ft": 230,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 230,
          "display_representative_Btu_h_ft": 230
        },
        {
          "deltaT_F": 325,
          "q_Btu_h_ft": 240,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 240,
          "display_representative_Btu_h_ft": 240
        },
        {
          "deltaT_F": 335,
          "q_Btu_h_ft": 250,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 250,
          "display_representative_Btu_h_ft": 250
        },
        {
          "deltaT_F": 345,
          "q_Btu_h_ft": 260,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 260,
          "display_representative_Btu_h_ft": 260
        },
        {
          "deltaT_F": 350,
          "q_Btu_h_ft": 265,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 265,
          "display_representative_Btu_h_ft": 265
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 350,
        "q_Btu_h_ft": 264.9,
        "working_endpoint_allowance_F": 0
      },
      "terminal_point_pixel": [
        2984.69,
        690.33
      ],
      "terminal_recovery_method": "Local observed343/348F ink trace intersected with350F frame; avoids vertical frame contamination",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "three-3/4",
      "panel": "delivery",
      "label": "3 \u00d7 3/4 in OD",
      "trace_domain_deltaT_F": [
        75,
        350
      ],
      "points": [
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 85,
          "q_Btu_h_ft": 50,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 50,
          "display_representative_Btu_h_ft": 50
        },
        {
          "deltaT_F": 95,
          "q_Btu_h_ft": 60,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 60,
          "display_representative_Btu_h_ft": 60
        },
        {
          "deltaT_F": 105,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 115,
          "q_Btu_h_ft": 75,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 75,
          "display_representative_Btu_h_ft": 75
        },
        {
          "deltaT_F": 125,
          "q_Btu_h_ft": 80,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 80,
          "display_representative_Btu_h_ft": 80
        },
        {
          "deltaT_F": 135,
          "q_Btu_h_ft": 90,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 90,
          "display_representative_Btu_h_ft": 90
        },
        {
          "deltaT_F": 145,
          "q_Btu_h_ft": 100,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 100,
          "display_representative_Btu_h_ft": 100
        },
        {
          "deltaT_F": 155,
          "q_Btu_h_ft": 105,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 105,
          "display_representative_Btu_h_ft": 105
        },
        {
          "deltaT_F": 165,
          "q_Btu_h_ft": 115,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 115,
          "display_representative_Btu_h_ft": 115
        },
        {
          "deltaT_F": 175,
          "q_Btu_h_ft": 125,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 125,
          "display_representative_Btu_h_ft": 125
        },
        {
          "deltaT_F": 185,
          "q_Btu_h_ft": 130,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 130,
          "display_representative_Btu_h_ft": 130
        },
        {
          "deltaT_F": 195,
          "q_Btu_h_ft": 140,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 140,
          "display_representative_Btu_h_ft": 140
        },
        {
          "deltaT_F": 205,
          "q_Btu_h_ft": 150,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 150,
          "display_representative_Btu_h_ft": 150
        },
        {
          "deltaT_F": 215,
          "q_Btu_h_ft": 160,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 160,
          "display_representative_Btu_h_ft": 160
        },
        {
          "deltaT_F": 225,
          "q_Btu_h_ft": 165,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 165,
          "display_representative_Btu_h_ft": 165
        },
        {
          "deltaT_F": 235,
          "q_Btu_h_ft": 175,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 175,
          "display_representative_Btu_h_ft": 175
        },
        {
          "deltaT_F": 245,
          "q_Btu_h_ft": 185,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 185,
          "display_representative_Btu_h_ft": 185
        },
        {
          "deltaT_F": 255,
          "q_Btu_h_ft": 195,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 195,
          "display_representative_Btu_h_ft": 195
        },
        {
          "deltaT_F": 265,
          "q_Btu_h_ft": 205,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 205,
          "display_representative_Btu_h_ft": 205
        },
        {
          "deltaT_F": 275,
          "q_Btu_h_ft": 210,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 210,
          "display_representative_Btu_h_ft": 210
        },
        {
          "deltaT_F": 285,
          "q_Btu_h_ft": 220,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 220,
          "display_representative_Btu_h_ft": 220
        },
        {
          "deltaT_F": 295,
          "q_Btu_h_ft": 235,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 235,
          "display_representative_Btu_h_ft": 235
        },
        {
          "deltaT_F": 305,
          "q_Btu_h_ft": 240,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 240,
          "display_representative_Btu_h_ft": 240
        },
        {
          "deltaT_F": 315,
          "q_Btu_h_ft": 255,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 255,
          "display_representative_Btu_h_ft": 255
        },
        {
          "deltaT_F": 325,
          "q_Btu_h_ft": 265,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 265,
          "display_representative_Btu_h_ft": 265
        },
        {
          "deltaT_F": 335,
          "q_Btu_h_ft": 280,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 280,
          "display_representative_Btu_h_ft": 280
        },
        {
          "deltaT_F": 345,
          "q_Btu_h_ft": 295,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 295,
          "display_representative_Btu_h_ft": 295
        },
        {
          "deltaT_F": 350,
          "q_Btu_h_ft": 290,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 290,
          "display_representative_Btu_h_ft": 295
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 350,
        "q_Btu_h_ft": 288.9,
        "working_endpoint_allowance_F": 0
      },
      "terminal_point_pixel": [
        2984.39,
        598.85
      ],
      "terminal_recovery_method": "Local observed343/348F ink trace intersected with350F frame; avoids vertical frame contamination",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "cement-1/2",
      "panel": "delivery",
      "label": "compound 1/2 in OD",
      "trace_domain_deltaT_F": [
        5,
        90.0
      ],
      "points": [
        {
          "deltaT_F": 5,
          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 10,
          "q_Btu_h_ft": 45,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 45,
          "display_representative_Btu_h_ft": 45
        },
        {
          "deltaT_F": 15,
          "q_Btu_h_ft": 65,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 65,
          "display_representative_Btu_h_ft": 65
        },
        {
          "deltaT_F": 20,
          "q_Btu_h_ft": 85,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 85,
          "display_representative_Btu_h_ft": 85
        },
        {
          "deltaT_F": 25,
          "q_Btu_h_ft": 105,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 105,
          "display_representative_Btu_h_ft": 105
        },
        {
          "deltaT_F": 30,
          "q_Btu_h_ft": 125,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 125,
          "display_representative_Btu_h_ft": 125
        },
        {
          "deltaT_F": 35,
          "q_Btu_h_ft": 145,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 145,
          "display_representative_Btu_h_ft": 145
        },
        {
          "deltaT_F": 40,
          "q_Btu_h_ft": 160,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 160,
          "display_representative_Btu_h_ft": 160
        },
        {
          "deltaT_F": 45,
          "q_Btu_h_ft": 180,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 180,
          "display_representative_Btu_h_ft": 180
        },
        {
          "deltaT_F": 50,
          "q_Btu_h_ft": 200,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 200,
          "display_representative_Btu_h_ft": 200
        },
        {
          "deltaT_F": 55,
          "q_Btu_h_ft": 220,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 220,
          "display_representative_Btu_h_ft": 220
        },
        {
          "deltaT_F": 60,
          "q_Btu_h_ft": 240,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 240,
          "display_representative_Btu_h_ft": 240
        },
        {
          "deltaT_F": 65,
          "q_Btu_h_ft": 260,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 260,
          "display_representative_Btu_h_ft": 260
        },
        {
          "deltaT_F": 70,
          "q_Btu_h_ft": 280,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 280,
          "display_representative_Btu_h_ft": 280
        },
        {
          "deltaT_F": 75,
          "q_Btu_h_ft": 295,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 295,
          "display_representative_Btu_h_ft": 295
        },
        {
          "deltaT_F": 80,
          "q_Btu_h_ft": 320,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 320,
          "display_representative_Btu_h_ft": 320
        },
        {
          "deltaT_F": 85,
          "q_Btu_h_ft": 340,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 340,
          "display_representative_Btu_h_ft": 340
        },
        {
          "deltaT_F": 90.0,
          "q_Btu_h_ft": 360,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 360,
          "display_representative_Btu_h_ft": 360
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 90.0,
        "q_Btu_h_ft": 360,
        "working_endpoint_allowance_F": 3
      },
      "terminal_point_pixel": [
        2175.87,
        341.27
      ],
      "terminal_recovery_method": "Local ink search at observed360Btu curve termination; inspected endpoint, no continuation beyond",
      "axis_clipping": "none within recovered trace"
    },
    {
      "id": "cement-3/8",
      "panel": "delivery",
      "label": "compound 3/8 in OD",
      "trace_domain_deltaT_F": [
        8,
        118.75
      ],
      "points": [
        {
          "deltaT_F": 8,
          "q_Btu_h_ft": 25,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 25,
          "display_representative_Btu_h_ft": 25
        },
        {
          "deltaT_F": 13,
          "q_Btu_h_ft": 40,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 40,
          "display_representative_Btu_h_ft": 40
        },
        {
          "deltaT_F": 18,
          "q_Btu_h_ft": 55,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 55,
          "display_representative_Btu_h_ft": 55
        },
        {
          "deltaT_F": 23,
          "q_Btu_h_ft": 70,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 70,
          "display_representative_Btu_h_ft": 70
        },
        {
          "deltaT_F": 28,
          "q_Btu_h_ft": 85,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 85,
          "display_representative_Btu_h_ft": 85
        },
        {
          "deltaT_F": 33,
          "q_Btu_h_ft": 100,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 100,
          "display_representative_Btu_h_ft": 100
        },
        {
          "deltaT_F": 38,
          "q_Btu_h_ft": 115,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 115,
          "display_representative_Btu_h_ft": 115
        },
        {
          "deltaT_F": 43,
          "q_Btu_h_ft": 130,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 130,
          "display_representative_Btu_h_ft": 130
        },
        {
          "deltaT_F": 48,
          "q_Btu_h_ft": 145,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 145,
          "display_representative_Btu_h_ft": 145
        },
        {
          "deltaT_F": 53,
          "q_Btu_h_ft": 160,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 160,
          "display_representative_Btu_h_ft": 160
        },
        {
          "deltaT_F": 58,
          "q_Btu_h_ft": 175,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 175,
          "display_representative_Btu_h_ft": 175
        },
        {
          "deltaT_F": 63,
          "q_Btu_h_ft": 190,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 190,
          "display_representative_Btu_h_ft": 190
        },
        {
          "deltaT_F": 68,
          "q_Btu_h_ft": 205,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 205,
          "display_representative_Btu_h_ft": 205
        },
        {
          "deltaT_F": 73,
          "q_Btu_h_ft": 220,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 220,
          "display_representative_Btu_h_ft": 220
        },
        {
          "deltaT_F": 78,
          "q_Btu_h_ft": 235,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 235,
          "display_representative_Btu_h_ft": 235
        },
        {
          "deltaT_F": 83,
          "q_Btu_h_ft": 250,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 250,
          "display_representative_Btu_h_ft": 250
        },
        {
          "deltaT_F": 88,
          "q_Btu_h_ft": 265,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 265,
          "display_representative_Btu_h_ft": 265
        },
        {
          "deltaT_F": 93,
          "q_Btu_h_ft": 280,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 280,
          "display_representative_Btu_h_ft": 280
        },
        {
          "deltaT_F": 98,
          "q_Btu_h_ft": 295,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 295,
          "display_representative_Btu_h_ft": 295
        },
        {
          "deltaT_F": 103,
          "q_Btu_h_ft": 310,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 310,
          "display_representative_Btu_h_ft": 310
        },
        {
          "deltaT_F": 108,
          "q_Btu_h_ft": 330,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 330,
          "display_representative_Btu_h_ft": 330
        },
        {
          "deltaT_F": 113,
          "q_Btu_h_ft": 340,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 340,
          "display_representative_Btu_h_ft": 340
        },
        {
          "deltaT_F": 118.75,
          "q_Btu_h_ft": 360,
          "reading_allowance_Btu_h_ft": 10,
          "raw_graphical_reading_Btu_h_ft": 360,
          "display_representative_Btu_h_ft": 360
        }
      ],
      "original_visible_limit": {
        "type": "printed curve termination; no extension into blank chart area",
        "deltaT_F": 118.75,
        "q_Btu_h_ft": 360,
        "working_endpoint_allowance_F": 3
      },
      "terminal_point_pixel": [
        2265.17,
        339.76
      ],
      "terminal_recovery_method": "Local ink search at observed360Btu curve termination; inspected endpoint, no continuation beyond",
      "axis_clipping": "none within recovered trace"
    }
  ],
  "origin_note": "Loss origin0 is identified separately; no numerical lookup below25F because traces merge. Dotted segment denotes this gap.",
  "display_method": "Monotone and same-panel size-ordered representatives selected within retained graphical allowances; raw rounded readings remain separate. This reflects inspected monotonic curve shape without adding numerical precision.",
  "terminal_recovery": "All23 curves include separately recovered visible terminal readings: right-axis readings, local pixel trace intersections with400Btu frame, or observed compound360Btu termination. Terminal abscissa working allowance3F for upper/compound limits. Regular grid retained separately from terminal.",
  "reading_method": "Recovered pixel traces sampled at10F (loss and ordinary/multiple delivery) or5F (compound); rounded to5Btu/(h ft). Line joining is a graphical aid, not exact curve equation.",
  "reading_allowances": "Working graphical allowances +/-5 loss/ordinary, +/-10 compound/multiple Btu/(h ft); not confidence, manufacturing tolerance or installed accuracy.",
  "insulation": {
    "nominal4_and_smaller_thickness_in": 1,
    "nominal6_and_larger_thickness_in": 1.5,
    "nominal5_group": "unprovided",
    "material_conductivity_condition_emissivity": "unprovided"
  },
  "compound_contact_properties": "unprovided",
  "wind": {
    "mph": [
      5,
      10,
      15,
      20,
      25,
      30
    ],
    "increase_percent": [
      7,
      9,
      11,
      12,
      13,
      14
    ],
    "basis": "still air"
  },
  "printed_unit_conversion": "W/ft = Btu/(h ft) x0.293",
  "tube_to_matched_pipe_factors": [
    {
      "tube_OD_in": 0.375,
      "matching_pipe_nominal_in": 0.375,
      "factor": 0.862
    },
    {
      "tube_OD_in": 0.5,
      "matching_pipe_nominal_in": 0.5,
      "factor": 0.878
    },
    {
      "tube_OD_in": 0.75,
      "matching_pipe_nominal_in": 0.75,
      "factor": 0.921
    },
    {
      "tube_OD_in": 1,
      "matching_pipe_nominal_in": 1,
      "factor": 0.934
    }
  ],
  "temperature_pair_qualification": "Earlier4in case30psig/250F unresolved; separate8in case150psig/365F retained. No correction inferred.",
  "teaching_example": {
    "inputs": {
      "NPS_in": 3,
      "Tp_F": 180,
      "Ta_F": -25,
      "Ts_F": 285,
      "wind_mph": 10
    },
    "deltaT1_F": 205,
    "deltaT2_F": 105,
    "loss_reading_rounded": 65,
    "loss_interval": [
      60,
      70
    ],
    "wind_loss_interval": [
      65.4,
      76.3
    ],
    "ordinary_1in_interval": [
      30,
      40
    ],
    "compound_3_8in_adjacent_readings": [
      [
        103,
        310
      ],
      [
        108,
        330
      ]
    ],
    "compound_graphical_bracket": [
      300,
      340
    ],
    "scope": "Conditional teaching comparison; no pressure, actual insulation/contact properties or installed selection.",
    "out_of_domain_example": "deltaT2=200F has no recovered compound reading."
  }
}