Instruments and Methods of Observation Programme

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Development, Maintenance and Operation of Instruments,
Observing Methods and Automatic Weather Stations

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Operational Guides/Guidelines
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Operational Guides and Guidelines
last update  ► 23 May 2013

Mercury [Hg]
How to prevent severe illness and to protect the environment
  Introducing the Concept of Uncertainty of Measurement in Testing in Association with the Application of the Standard ISO/IEC 17025 (ILAC G17:2002)
  Guidelines for the determination of calibration intervals of measuring instruments (ILAC G24:2007)
  ILAC Policy on Traceability of Measurement Results (ILAC P10:01:2013)

Laboratory Accreditation:
      -  Why use an accredited laboratory
      -  Why become an accredited lab

      -  The advantages of being an accredited laboratory

      -  Laboratory Accreditation or ISO 9001 Certification)


ISO/IEC 17025:2005 Guidance
  Laboratory Quality Manual Template
  Electronic Statistics Textbook

ASOS User's Guide


Met Office Surface Data Users Guide


Web Editor Sary Vargas, 19 July 2007