Metrohm 889 IC Sample Center - Manual (Page 43)

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5 Handling and maintenance
889 IC Sample Center
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Note
If you are using the sample racks with 12 or 48 vials, then you
must adjust the setting of the needle height to > 2 mm. This will
prevent the needle from touching the bottom of the vial.
18 Perform a rinsing procedure in order to clean the new needle. Start
the Wash function. To interrupt the rinsing procedure, click on
Stop.
19
Note
The needle settings may need to be adjusted.
In MagIC Net ™, open the configuration settings of the 889 IC Sam-
ple Center and select the Needle tab.
Perform the necessary setting.
5.3.3 Replacing the air needle
Replace the air needle as follows:
1 Replace the sample needle, (see Chapter 5.3.2, page 33).
2 Undo the fastening nut (made of chrome) for the air needle.
3 Undo the fastening nut (made of chrome) for the adjusting screw.
4 Remove the air needle.
5 Tighten the height adjustment nut on the fixing nut (made of
chrome). The thread of the height adjustment nut must match the
lower part of the fixing nut. The O-ring must be properly seated in
the fixing nut.
6 Insert the air needle.
7 Mount the sample needle.
8 Select the correct needle height for the new needle in the manual
operation feature of MagIC Net ™ on the Needle tab.