Campbell-scientific OBS-3+ and OBS300 Suspended Solids and Turbidity M Manuel d'utilisateur télécharger pdf (Page 24)

OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors

FIGURE 7-3. Calibration certificate showing volts coefficients

8. Calibration

8.1 Turbidity

The normalized response of an OBS sensor to styrene divinylbenzene beads

(SDVB) turbidity over the range from 0 to 4000 NTU is shown on FIGURE

8-1. As shown on the inset, the response function is contained within region

‘A’, the linear region, of the universal response curve. However, there is

residual nonlinearity that is removed by calibration and by computation of

Polynomial for

Converting to

NTU

Polynomial for

Converting to

NTU

Curve Type

CSL

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Campbell-scientific OBS-3+ and OBS300 Suspended Solids and Turbidity M Manuel d'utilisateur Page 24