Turbidity measurements do not need to be calibrated, as a standardized calibration curve according to ISO 7027 is stored in the instrument. It is possible to create acustomer-specific calibration of the turbidity curve. If the standard curve has been altered, a star (*) appears before the measurement point.Solids measurements must be calibrated on site. It is not possible to define a general standard for this as the type and composition of the solid particles can differ greatly.
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