Standard

NS-EN ISO 7027-2:2019

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Omfang

This document specifies the following semi-quantitative methods for the assessment of transparency of waters: a) measurement of visual range using the transparency testing tube (applicable to transparent and slightly cloudy water), see Clause 4; b) measurement of visual range in the upper water layers using the transparency testing disc (especially applicable to surface, bathing water, waste water and often used in marine monitoring), see 5.1; c) measurement of visibility by divers in a destined depth, see 5.2. NOTE The quantitative methods using optical turbidimeters or nephelometers are described in ISO 7027-1.

Dokumentinformasjon

  • Standard fra SN
  • Publisert:
  • Utgave: 2019-02
  • Versjon: 1
  • Varetype: NAT
  • ICS 13.060.60
  • National Committee SN/K 153

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