Maintenance and care
multi N/C pharma HT
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– X-axis direction: Forward or backward movement
– Y-axis direction: Left or right movement
– Z-axis direction: Up or down movement
Figure 55Adjusting position 1
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Adjust position 1: To adjust the x-axis and y-axis positions, remove the sample ves-
sel. Move to the position. Place the magnetic stirring rod on the sample tray at this
position. If the canula is in the middle of this position, it has been adjusted correctly.
– The y-axis value must not be smaller than 33 mm to ensure correct operation.
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To adjust the z-axis direction, place a sample vessel with a screw cap and a septum
cap, e.g., an EPA sample vessel, on the sample tray.
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Adjust the special needle in the z-axis direction so that approx. 2 cm of the ventila-
tion slot are visible above the septum.
The ventilation slot must be located above and below the septum. No pressure com-
pensation is otherwise possible in the sample vessel.
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Adjust the flushing position: Adjust the x- and y-axis positions so that the canula is
located in the middle of the wash cup.
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Adjust the special canula in the z-axis direction so that the ventilation slot can be
seen at the upper edge of the wash cup.
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After each change, click on [Rinse position adjust] or [Position 1 adjust].
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The autosampler will move to the new position.
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Repeat these steps until the canula position is optimized.
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Click on [Save] to save the adjustment values.
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Open the Sampler Alignment window again. Move to the flushing position and posi-
tion 1 with the buttons to check.
ü
The autosampler is adjusted.
Adjusting the autosampler for automatic acidification
The autosampler can automatically acidify samples for NPOC measurement. The immer-
sion depth of the canula in the sample vessel depends on the z-axis direction adjust-
ment for position 1.
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Adjust the canulas at position 1.
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Check the adjustment values via a test measurement.
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Ensure the canula goes through the sample lid but does not immerse in the sample
liquid during acidification.
