Maintenance – Hach-Lange PHOSPHAX indoor sc User Manual
Page 44
44
Maintenance
5. Enter the number of measurements which should be used for
the validation measurements.
(Default value: 3; value range: 2 to 10)
6. Select START after adjusting both parameters and the analyzer
is going into the service state. The remaining time is displayed
in seconds.
The OUTMODE is set to HOLD.
7. Select ENTER to modify the analyzer (
Figure 19 on page 45
):
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: To receive stable measurement values, close the door of the
analyzer.
8. Press ENTER to start the validation.
Note: The remaining time is displayed in seconds:
9. Press ENTER to escape.
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.
•
For the adjusted number of validation measurements, the
values are listed and the calculated average of this value is
displayed.
Note: The data log records the validation values and average value from
the analyzer.
10. Press ENTER to proceed.
Note: Press START to confirm the inquiry to return to the
measurement process or to the service mode.
11. Select ENTER and modify the instrument to the original
analyzer configuration.
12. Start the measurement mode or hold the service mode.
(Discharge value + measurement value) 5 minutes = remaining time/sec