The instructions point out that the comparator block should be used to compare the colours. Can this be done without the comparator block as well ? Or is there a factor from this comparison that is required for the measurement ?
The colour charts are intended to be used with the comparator block. Besides this, when the comparator block is used, the blank water sample compensates for the water’s natural colour.
Therefore, if the comparator block is not used, there will most likely be deviations in the readings.