multi N/C pharma HT
Maintenance and care
83
6.2.4
Setting the NPOC purge flow
CAUTION
Risk of burns from the furnace
To set the NPOC purge flow, you must open the side wall of the analyzer. This presents a
risk of burn injuries from the hot furnace.
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When setting the NPOC purge flow on the gas box, maintain a safe distance to the
hot combustion furnace.
The NPOC purge flow is preset to approx. 50 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 located behind the left side wall, to the left of the combustion fur-
nace.
Set the NPOC purge flow as follows:
Figure 56Grounding conductor connection on the side wall
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Open the left side wall of the analyzer. Push the accessory modules to the side if nec-
essary. Do not kink any connection hoses.
– Unscrew the four attachment screws. The screws are captive and remain attached
to the wall.
– Remove the protective grounding. Set the side wall aside safely.
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Open the window of the same name with the Instrument |Device control menu op-
tion.
Figure 57Setting the purge flow
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Select the Purging option in the list field.
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Select the purge time in the Time field in the 1 to 900 s range.
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For sample feed with autosampler: In the Rack position field, select any position on
the sample tray to monitor the purge flow at.
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Place a sample vessel with ultrapure water at this position.
