General Notes; General Description; Factory Calibration; Operating Principles - Lovibond TurbiCheck Mode D'emploi

General notes

GB

General description

The TurbiCheck is a portable turbidity meter, based on the requirements of ISO 7027 (Water
Quality – Determination of Turbidity). The instrument features auto ranging over the range
of 0.01 to 1100 NTU/FNU.
The turbidimeter is supplied in a case complete with accessories and spares. Calibration
Standards guarantee stability and reproducibility of the results. Always replace the cover on
the sample chamber to protect against dust.

Factory calibration

The turbidimeter TurbiCheck is factory calibrated with Formazin Primary Standard and does
not require user calibration before use (see chapter "Menu options: User calibration").

Operating principles

The instrument measures turbidity in the range 0.01 to 1100 NTU/FTU featuring auto ranging.
The light source is an infrared LED (light emitting diode) with a wavelength of 860 nm.
The emitted light is reflected by turbidity
in the sample. The scattered light will be
detected at an angle of 90° by a photo-
diode.
This principle is part of ISO 7027.
The international Reference Standard for
turbidity is a Formazin solution. Results
related to these standards are indicated as
FNU (Formazine Nephelometric Units).
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