Analytical Quality Assurance (Aqa); General Information; Settings For Quality Assurance (Aqa) - Xylem WTW Turb 750 IR Operating Manual

®
Turb 750 IR/T
AQA in the
measured value
documentation
AQA test stan-
dards
Overview of the
turbidimeter moni-
toring
ba77233e05 06/2023

4.10 Analytical quality assurance (AQA)

4.10.1 General information

Target of the analytical quality assurance (AQA) is to guarantee correct and
precise measurement results.
The monitoring includes a check routine that has to be successfully repeated
by the user within a certain period (AQA-interval).
The AQA monitoring is not enabled in the delivery condition.
All measured values that are measured after the test was passed and within
the AQA interval are given the label [AQA] in the measured value documen-
tation.
At least one AQA test standard, e.g. 10 FNU/NTU is required for the turbidi-
meter monitoring. A maximum of 5 test standards can be configured for an
AQA test.
Note the expiry date of the AQA test standards. When you use
new AQA AQA test standards, is it always required to check the
values in the turbidimeter. Adjust the values at the turbidimeter
as necessary.
The turbidimeter monitoring (AQA) includes the following parts:
 Do the settings in the menu.
– Specify the Intervall
– Specify the tolerance
– Enter target values and lot numbers for AQA test standards
 Carry out the AQA check. The turbidimeter compares the results with the
nominal values while taking into account the selected tolerance ranges.

4.10.2 Settings for quality assurance (AQA)

The AQA menu item is displayed if the authorization exists (see
section 4.2).
The settings are in the menu, Configuration / Turbidity / AQA. Move to the
Operation
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