4 - Setting Up the XLP 6000 for Your Application
Glossary
Cavro® XLP 6000 Modular Syringe Pump Operating Manual, 734237-C, en
4 - 1
4
Setting Up the XLP 6000 for Your Application
The XLP 6000 is capable of providing precision pumping in a wide variety of liquid
handling systems. The interplay of fluid viscosity, aspiration and dispense speeds,
and system geometry (syringe size, tubing inner diameter, and valve inner
diameter) determine the behavior of the XLP 6000 in a particular application.
Following is a description of the hardware, fluid, and pump control parameters to
be evaluated and optimized in managing these interdependencies for optimal
pump performance.
4.1
Glossary
air gap
A small volume of air at the end of the output tubing or sandwiched between
two fluids in the pump system tubing. Air gaps may be created by aspirating
air (programmed air gaps) or by the spring action of the fluid system (inertial
air gaps).
aspirate/dispense tubing
Connects the valve output port (1/4-28 thread or M6 fitting) to a sample
source and destination. To ensure good breakoff, aspirate/dispense tubing
tends to have a smaller I.D. than reagent tubing, and a necked-down or
tapered end.
backlash
Mechanical play in the syringe drive created by accumulated mechanical
clearances.
backpressure
The pressure which must be exceeded to move fluid through tubing.
Backpressure is created by a combination of fluid inertia and friction.
breakoff
Describes how the last droplet of fluid exits the end of the output tubing
following a dispense. Rapid or sharp breakoff means that the droplet exits
cleanly with high inertia.
breakup
Undesired air gaps created by overly rapid aspiration.
