Maintenance and care
multi N/C pharma HT
80
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Adjust the immersion depth of the sample intake canula into the wash cup and into a
sample vessel in position 1 of the sample tray.
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To do this, select the Rinse position or the Position 1 entry in the Please select posi-
tion needing adjustment group.
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To adjust position 1, place a sample vessel with a magnetic stirring rod onto the
sample tray.
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To adjust the flushing position or position 1, increase or decrease the z-axis values.
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Set the canulas to the flushing position so that the canulas are immersed by at least
1 cm in the wash cup.
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For the AS vario ER autosampler: Set the maximum z-axis value of 145 mm at the
flushing position. The canulas will then be sufficiently immersed in the wash cup
during flushing.
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Set the canula heights at position 1 so that the stirring rod can rotate unhindered
(approx. 5 mm clearance).
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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.
6.2.3
Adjusting the EPA Sampler
NOTICE
Risk of bending
The canula may bend during adjustment.
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Unscrew the screw connections on the canulas before adjustment.
Clamp the two canulas high enough in the holder to prevent them dipping into the ves-
sels (basic position).
During adjustment, the sample intake canula must be adjusted to the rinse position and
to sample position 1. Alignment is carried out by increasing or decreasing the x-, y- and
z-axis values.
For sample vessels with septum caps, special sample intake and purging canulas with
piercing function are required: Piercing needles with ventilation slot.
