INTELLICYT iQue SCREENER, Hardware Manual

Page: 63 / 110

57 iQue
®
Hardware Manual, iQue Maintenance
Pump Head Tension Screw
5. Slowly loosen the screw by turning in a counterclockwise motion until the sample slugs appear to stop.
6. Then slowly tighten the screw until the movement towards the iQue detector resumes. Note that changes in
screw tension can take up to 30 seconds to appear. Make small adjustments and wait to see their effect.
7. Loosen the screw again very slowly until sample just starts to stop.
8. From this inflection point, tighten the screw one half turn (180 degrees clockwise). This should provide
enough tension so that the samples move evenly without breaking up and without overly wearing the tubing.
9. If this does not improve the quality of sample slugs, release and reset the pump head locking mechanism,
making sure the tubing is correctly seated, and repeat the tensioning procedure.
WARNING
The pump tension screw is NOT fully removable. Applying too much force in
a counterclockwise direction beyond the intended range of movement may
cause it to break.
NOTE
Over-tensioning the pump tension screw will cause the tubing to wear
prematurely. Set the pump tension screw to have just enough tension for
proper sample slug formation.