Hach-Lange POLYMETRON 9240 Operator Manual - Manual (Page 54)

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Installation
4.4.8 Flow rate adjustment
1. From the MAINTENANCE/DIAG. menu select
START UP
and press Enter
2. First, the system automatically primes both the
calibration and reactivation tubes.
3. Check that there are no air bubbles in the reagent
tubes for reactivation and auto calibration.
4. The next step allows you to regulate the sample
flow rate on each measurement channel. The name
of the channel to regulate is displayed (the default
name of Sample 1 for channel 1 is illustrated left).
5. The analyzer automatically empties and refills the
overflow vessel to determine the flow rate which is
displayed on screen.
6. The flow rate for each channel should be 6 to 9
L/hour.
7. Using a screwdriver, regulate the channel’s sample
flow by turning counter-clockwise to increase the
flow rate or clockwise to decrease the flow rate.
8. The process is repeated until the flow is correctly
regulated for the channel. At this point select OK.
9. The system then allows you to regulate the next
channel until all flow rates have been set for the
configured channels.
10. Once all flow rates for the configured channels have
been set, an Action completed message will be
displayed.
11. Select Esc to exit and complete the process.