Roche Diagnostics
D-14 Operator’s Manual · Version 1.0
7 General maintenance actions URISYS 2400
Exchange user-replaceable parts
a To reassemble the syringe
1 Place the syringe holder O-ring into the syringe holder. If the O-ring
appears damaged or worn, replace it.
2 Inspect the glass syringe barrel for chips or cracks at the top and bottom. If
the syringe barrel is etched or damaged in any way, replace it. Ensure that
the barrel and the syringe holder are dry. Place the syringe barrel over the
plunger and onto the syringe holder.
3 Return the syringe holder onto its mounting block by tilting the top of the
syringe towards the instrument. Ensure that the syringe holder is in the
recess on the top surface of the mounting block.
4 Rotate the syringe holder until the side tube port is aligned to accept the
syringe side-tubing. Check if the blue syringe base correctly fits into the
well of the metal support plate.
5 Tighten the top knurled locking screw with your fingers. Ensure that the
syringe assembly is seated correctly and that the glass barrel O-ring is
properly positioned.
6 Reconnect the top tubing of the syringe and tighten the retaining nut with
your fingers.
7 Reconnect the side tubing and tighten the retaining nut with your fingers.
8 Turn the analyzer on.
If the syringe holder is not properly seated in its mounting block recess, damage to
the syringe assembly may occur.
Figure D-11 Securing plunger in notch
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