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Cedex HiRes Analyzer Operator’s Guide
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5 Syringe Maintenance
Moving parts of the Syringe Module may cause hand injuries. Never run a measurement on the Cedex
HiRes Analyzer without the protective cover for the Syringe Module in place. When performing a syringe
maintenance, be aware of the risks from moving parts.
The fl ow chamber, tubes, syringe and 8-way valve are cleaned during the Intensive Clean routine carried out by
the Liquid Management (see “
Cleaning Options”).
However, the syringe is subject to wear and tear and must, therefore, be regularly replaced to maximize the life
span of the 8-way valve and to guarantee optimal performance. The syringe should be replaced approximately
every 6 months under normal use of the analyzer. More frequent use may require more frequent changing of
the syringe.
To change the syringe, follow the steps specifi ed in the sections below:
5.1 Removing the Syringe
Follow the instructions below:
1
Click on Syringe Maintenance in the Functions menu of the Control Center. The Syringe Maintenance
window will open (see Figure 82).
2
Click on the Remove Syringe button. The syringe barrel will be moved to a position to allow easy removal.
3
Remove the protective cover with the use of a philips head screwdriver. Turn the screws 90 degrees counter-
clockwise to release the screw.
4
Hold the syringe barrel by the Luer lock and turn it anti-clockwise to remove it from the 8-way valve (see
Figure 83).
5
Once the connection is loosened, keep holding the syringe barrel in an upright position beneath the 8-way
valve to prevent it from jamming with the plunger.
6
Remove the bottom screw that connects the plunger to the syringe module with the other hand.
7
Remove the syringe from the syringe module.
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Figure 82: Syringe Maintenance window
Syringe Maintenance
Removing the Syringe
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