Turbidity Correction - wtw PhotoLab Spektral Operating Instructions Manual

11 Correction functions
11.4

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).
After the measurement is finished:
86
The turbidity correction function is not active when de-
livered.
This function is not necessary, or useful,
in all methods. If the turbidity correction is
active, the photometer automatically de-
cides whether to perform the function or
not depending on the method.
→ Call up the turbidity correct. submenu in the cor-
rection functions menu.
The following display appears:
The turbidity correct. function appears:
→ Select the menu item, on
→ Confirm with
.
→ Call up the concentration measuring mode by
pressing .
→ Insert the measuring cell.
Display of the measured value with turbidity correc-
tion switched on:
Identified by TC.
Warning of excessive turbidity:
If the turbidity absorbance of 0.100 A is exceeded, the
photometer displays the measured value together
with a warning (high turb.).