Measuring The Turbidity - Xylem WTW Turb 750 IR Operating Manual

®
Turb 750 IR/T
Settings
Measuring
ba77233e05 06/2023
Move to the Configuration menu with the <MENU
Menu item
Time
Date
Date format
4.8

Measuring the turbidity

NOTE
Never pour any liquids directly into the cell shaft. Always use a cell for
measurement. The meter only measures precisely if the cell is closed
with the black light protection cap and aligned with the marking of the
measuring position determined.
The outside of the cell always has to be clean, dry, and free of fin-
gerprints and scratches. Clean the cells before starting to mea-
sure (see section 5.2.2). Only hold the cells by the top or by the
black light protection cap.
With turbidity values under 1 FNU/NTU, the measured value is
strongly influenced by the cell and its alignment.
To increase measurement accuracy with turbidity values under 1
FNU/NTU, calibration in the 0.02 FNU/NTU standard and later
measurement should take place in the same cell.
For quick and easy measuring we recommend that you use marked cells (see
section 4.5.1 P
REPARING THE CELL
If your cells are not marked you can determine the suitable position of the in-
dividual cells in the cell shaft while measuring.
1 Clean the cell (see section 5.2.2).
2 Rinse the cell:
Pour approximately 10 ml sample into the cell. Close the cell and ro-
tate it several times before throwing the sample away.
3 Repeat the rinsing procedure twice more.
Setting Explanation
hh:mm:ss Enter the time with the number
keys
Enter the date with the number
keys
Settings of time and date.
dd.mm.yy
mm.dd.yy
mm/dd/yy
).
Operation
(7)
> key.
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