Maintenance 5
Agilent SPS 4 Autosampler User’s Guide 59
If necessary, the probe can be removed from the autosampler and placed
in an ultrasonic bath for cleaning.
Replacing the Wash Pump Tubing
Routine maintenance of the autosampler includes replacement of the wash
pump tubing. Because of the operating nature of the wash pump, the
tubing will probably be the most frequently replaced item on the Agilent
SPS 4 autosampler. If you use strong bases, acids, or solvents as rinsing
agents, the tubing may break down rapidly.
The optimal distance between the bridges on the pump tubing is
82
–85 mm.
To replace the wash pump tubing, complete the following steps:
1 Shutdown and unplug the autosampler.
2 Release the pressure plate by disengaging the occlusion arm.
3 Remove the old tubing, and replace the pump tubing.
Carefully pull or cut the old tubing to remove it.
Replace the new tubing carefully. Damage can result if you apply too
much force.
4 Install new tubing following the instructions in “Loading Wash Pump
Tubing” on Page 47.
CAUTION
Do not use organic solvents or abrasive cleaning agents. This will help to preserve the
plastic components and painted surfaces.
NOTE
A rinse solution should always be pumped through the autosampler at the end of a run.
NOTE
• Keep delivery and suction lines as short as possible.
• Run at a slow speed when pumping viscous fluids.
• Use the largest bore tube running at a slow speed for the longest tube life.
• It is recommended to release the occlusion arm when the pump is not in use to extend
the life of the pump tubing.
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