ANATEL A643, Operator'S Manual, Page: 87 / 222

Anatel A643a - Calibration and Validation 87 of 220
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Anatel
Operator Manual
6.3
TOC Validation
The principles and procedure for performing a TOC validation are essentially the same as
those used to perform a calibration. The intent of validation is to check the accuracy of the
calibration, thereby ensuring that the Anatel A643a measures samples reliably. Validation can
be either a single-point analysis or multipoint analysis and the standard concentrations are
user-selected.
Note:
Refer to Standard Operating Procedure (SOP) #643–5/5A for complete instructions on
performing this procedure.
To perform a TOC validation:
1) With the desired Analyzer selected in any View, press the Manual Key to access its
menu selections.
2) Use the Up and Down Keys to specify Calibrations .
3) Press Enter to display its submenu.
CAUTION:
In a networked environment (see “Network Installation” on page 39 ), it is important to confirm
the instrument’s Serial Number before proceeding. Operation of the wrong Analyzer could
result in water leakage from the sample vessel when it is removed during this procedure.
4) Use the Up and Down Keys to specify Validate . If the chosen Analyzer is connected to
an A-Net network on which other instruments reside, the analyzer will prompt to confirm
that it is the correct instrument by verifying its serial number. The Analyzer will begin a
temperature stabilization process, its duration depending on the sample water
temperature. The actual time required is displayed and counted down.
5) Press Enter to continue and wait while the sample line is drained.
6) Specify the validation standard levels to be performed. A 500 ppb TOC sucrose
concentration level is enabled by default, indicated by the checkmark preceding it.
Enable any other levels by pressing the Up and Down Keys to select the desired
concentration, then pressing Enter to edit and Up and Down toggle the checkmark on
and off. At least one validation level must be selected.
Fig 6-9 : TOC Validation