Hach AMTAX sc Mode D'emploi page 20

Maintenance
6.6 Validation (Analytical quality assurance)
Regular validation checks of the complete instrument must be completed to make sure the
analysis results are reliable.
Required parts:
•
•
•
Follow the internal menu steps for the validation.
1. From the MENU select SENSOR SETUP>AMTAX SC and press ENTER.
2. Select MAINTENANCE>TEST/MAINTENANCE>VALIDATION> DISCHARDED
3. Enter the number of measurements which should be discharged before starting the
4. Select MEASUREMENTS.
5. Enter the number of measurements which should be used for the validation
6. Select START after adjusting both parameters and the analyzer is going into the
7. Select ENTER to modify the analyzer
Note: To receive stable measurement values, close the door of the analyzer.
8. Press ENTER to start the validation.
9. Press ENTER to escape.
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Blind plug LZY193 (Plugging set LZY007)
Beaker (for example 150 mL)
Standard solution for validation
MEASUREMENTS.
measurements of the validation. (Default value: 3; value range: 2 to 5)
measurements.
(Default value: 3; value range: 2 to 10)
service state. The remaining time is displayed in seconds.
The MAINTENANCE OUTPUT MODE is set to HOLD.
a. Unscrew the fitting (item 2) of the sample tube (item 5) which connects the
overflow vessel (item 1) and the valve block (item 4) at the overflow vessel.
b. Screw in the blind plug (item 3) in the thread of the overflow vessel (item 1) and
insert the sample tube in a beaker (for example 150 mL) with standard solution for
the validation.
Note: The remaining time is displayed in seconds:
(Discharge value + measurement value)
The results are displayed to note down.
• The discharge value and the Conc value are counted down to zero.
• The validation is finished when the process shows the service mode and the
remaining time is 0 seconds.
(Figure 2 on page 21):
×
5 minutes = remaining time/sec
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