Hach PHOSPHAX indoor sc, Addendum

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Maintenance
6.3 Validation (Analytical quality assurance)
Regular validation checks of the complete instrument must be
completed to make sure the analysis results are reliable.
Required parts:
• Blind plug LZY193 (Plugging set LZY007)
• Beaker (for example 150 mL)
• Standard solution for validation
Follow the internal menu steps for the validation.
1. From the Main menu select Sensor setup>PHOSPHAX SC and
press Enter.
2. Select Maintenance>Test/Maintenance>Validation>Discarded
measurements.
3. Enter the number of measurements which should be
discharged before starting the measurements of the validation.
(Default value: 2; value range: 1 to 5)
4. Select Measurements.
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 Output mode is set to Hold.
7. Select Enter to modify the analyzer ( Figure 1 on page 14 ):
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.
General function check. X
Check system for air impermeability. X
Clean manually and adjust cleaning interval if applicable. X
Read out and analyse event log. Read out and check data log
if necessary.
X
Check reagent pump and replace if necessary (check every
6 months after 12 months of use).
(X)
2
X
Replace pump head for air pump. X
1
Recommended, typical maintenance interval, especially for reagents. The actual reagent exchange intervals are depending on
configuration.
2
Maintenance cycles are given for standard applications. Deviant applications may cause different maintenance intervals.
Table 2 Routine maintenance schedule
Description 3 months 6 months 12 months 24 months