Turbidity Correction - wtw PhotoLab S12-A Operating Instructions Manual

10. Correction functions

10.3 Turbidity correction

Turbidity correction is used in sample solutions that
contain finely distributed suspended particles. The
suspended particles cause a light absorption.
This leads to incorrect (too high) measured values.
The function remains permanently switched on after it
has been activated. Values that were measured using
turbidity correction are given an identifier in the
display and in the documentation (printout and
storage).
– In the correction funct. menu, call up the turbidity
correct. submenu.
The following display appears:
4
– Press to call up the concentration measuring
mode.
After approx.
2 s:
Warning of excessive turbidity:
If the turbidity absorbance of 0.100 A is exceeded, the
meter displays the measured value together with a
warning.
The turbidity correct. function is not active when deliv-
ered.
This function is not necessary, or useful, in all
methods. If the turbidity correction is active, the
photometer automatically decides whether to
perform the function or not depending on the
method.
The turbidity correct. function appears:
– Select the on menu item with
1
– Confirm with .
– Insert the measuring cell.
Display of the measured value with turbidity correction
switched on: Identified by TC.
3 28
or
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