Why do I need to calibrate my turbidimeter? Aren't turbidimeters calibrated at the factory?

Dokument-ID

Dokument-ID TE404

Veröffentlichungsdatum

Veröffentlichungsdatum 03.01.2022
Frage
Why do I need to calibrate my turbidimeter? Aren't turbidimeters calibrated at the factory?
Zusammenfassung
Purpose of calibrating a turbidimeter
Antwort
The light source used in turbidimeters has a specified temperature (required by USEPA regulations) at which it is required to operate. Because these lamps operate at a relatively high temperature, the output of the lamps can change over time, which can affect the amount of light that reaches the detector and thus the turbidity reading. Hach lamps are specially designed for increased stability and are stable upon factory calibration. However, USEPA regulations mandate calibration upon receipt and set up of the instrument at the test site, as well as calibration on a quarterly basis.

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