Wet Labs ECO VSF, Руководство пользователя

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ECO VSF User’s Guide (VSF) Revision AN 14 Sept. 2011 15
5. Data Analysis
Data from the ECO VSF represents raw output from the sensor. Applying linear scaling constants,
this data can be expressed in meaningful forms of inverse meters for each of the respective angles.
5.1 Data Corrections
Attenuation coupling—Many scattering sensors require a subsequent attenuation correction
for pathlength coupling of the transmitted and scattered light. This is typically a function of
the propagation distances of the light as well as the magnitude of the water attenuation.
Because the
ECO VSF incorporates very short pathlengths and scattering volumes in its
measurements, it is relatively immune to this pathlength coupling (Figure 6). For attenuation
coefficients up to approximately 4 m
-1
no data correction is required. If you are operating the
meter in waters with greater turbidity, contact the factory for configuration information.
Typical VSF Response
0
200
400
600
800
1000
1200
1400
0 0.5 1 1.5 2 2.5 3 3.5 4
1/m
Ra
w
Coun
ts
100
125
150
Figure 4.
Linearity Response