OIML D 24 : 1996

Foreword
1 Scope and field of application
2 Units of measurement
3 Technical and metrological characteristics of total
  radiation pyrometers
4 Technical and metrological characteristics of
  calibration equipment
5 Calibration of total radiation pyrometers
6 Metrological control

Pertains to total radiation pyrometers that measure radiance temperature by making use of the relationship between the radiance of the source, integrated over the major part of the spectrum of thermal radiation, and its temperature.