Calibration, 1 turbidity, Turbidity – Campbell Scientific OBS-3+ and OBS300 Suspended Solids and Turbidity Monitors User Manual
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
14
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