DIN 2257-1:1982-11

1 General
2 Units
      2.1 Unit of length
      2.2 Units of angle
3 Activities
      3.1 Inspecting
             3.1.1 Measuring
             3.1.2 Gauging
      3.2 Calibrating
      3.3 Setting
      3.4 Adjusting
4 Measuring equipment
      4.1 Indicating measuring instrument
             4.2.1 Material measure
             4.2.2 Gauge
      4.3 Auxiliary measuring devices
5 Metrological concepts
      5.1 Quantity to be measured
      5.2 Reading
             5.2.1 Analogue reading
             5.2.2 Digital reading
             5.2.3 Any other reading
      5.3 Line scale
             5.3.1 Scale spacing
             5.3.2 Scale division
             5.3.3 Scale interval
             5.3.4 Vernier interval
      5.4 Digital scale
             5.4.1 Digital division
             5.4.2 Digital interval
      5.5 Measured value
      5.6 Result of a measurement
      5.7 Sensitivity
      5.8 Reading range
      5.9 Measuring range
             5.9.1 Measuring span
      5.10 Range of adjustment
      5.11 Range of application
      5.12 Measuring force
      5.13 Hysteresis of measuring force
      5.14 Hysteresis error
      5.15 Measuring instruction
      5.16 Abbe principle
      5.17 Taylor principle

Lengths and length ratios include for example external dimensions, internal dimensions, dimensions of shoulders, dimensions of diameters, widths, thicknesses, distances between centre lines of holes, angles, radii. Also included are dimensions in respect of form and position, and surface dimensions. Linear and angular dimensions are specified by means of a numerical value and of a unit, e.g. 20,985 mm, and they are as a general rule related to a reference temperature of 20degreeC in accordance with DIN 102.