Setting The Npoc Purge Flow; Figure 50 Setting The Purge Flow; Figure 51 Setting The Npoc Purge Flow - Endress+Hauser analytikjena multi N/C UVHS Operating Manual

Maintenance and care
6.2.4

Setting the NPOC purge flow

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The NPOC purge flow is preset to approx. 100 ml/min. Depending on the measurement
task, you can increase or decrease the NPOC purge flow via the NPOC needle valve. The
NPOC needle valve is on the device front behind the left-hand door.
Set the NPOC purge flow as follows:
Figure 50Setting the purge flow
} Select the Purging option in the list field.
} Select the purge time in the Time field in the 1 to 900 s range.
} For sample feed with autosampler: In the Rack position field, select any position on
the sample tray to monitor the purge flow at.
} Place a sample vessel with ultrapure water at this position.
} For manual sample supply: Insert purge hose 10 in a sample vessel filled with ultra-
pure water.
} Click the [Start F2] button.
} Unscrew the adjustment screw on the NPOC needle valve.
} Set the desired NPOC purge flow:
– Increase the NPOC purge flow: Turn the needle valve to the left.
– Decrease the NPOC purge flow: Turn the needle valve to the right.
} Check the flow indication in the System state window when doing this. The current
NPOC purge flow is displayed under Purge.
} Screw the adjustment screw on the needle valve back in.
Figure 51Setting the NPOC purge flow
1 Needle valve for setting the NPOC purge
flow
multi N/C UVHS, multi N/C pharma UV
2 Needle valve for setting the reagent
purge flow