ISO 23668:2022

This document specifies the performance requirements and the test procedures for a pH meter used for continuous on-board monitoring using combination electrodes. The pH meter applies to measuring the pH of the following water for on-board consumption and research purposes: a) natural seawater and freshwater, b) freshwater produced from freshwater generators, c) the used process water for running machinery on-board ships. This document also specifies the method for evaluating performance, calibration, and maintenance of a pH meter used for continuous on-board monitoring.