ISO 7027-2:2019 PDF
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Water quality — Determination of turbidity — Part 2: Semi-quantitative methods for the assessment of transparency of waters
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.
| Edition | 2019 |
|---|---|
| Standard Part No | 2 |
| Published Date | 2019 |
| Published By | International Standardization Organisation |
| Page Count | 12 |
