Watson-Marlow 120F/DV - Manual (Page 22)

Watson-Marlow 114DV pumphead: operating instructions 4
3.5 Tube holder
positioning
The pumphead can be adjusted to accommodate
1.6mm wall tubing in sizes from 0.5mm bore to
4.8mm bore. It is preset to accommodate 1.6mm
wall tubing with 1.6mm, 2.4mm, 3.2mm, 4.0mm
and 4.8mm bore.
Tube bore size 0.5mm 0.8mm 1.6mm 2.4mm 3.2mm 4.0mm 4.8mm
Tube holder posi-
tion
Inner Inner Outer Outer Outer Outer Outer
Inner position, for small tubing
Outer position, for large tubing
Note: If the tube holder is in its inner position, for
small tubing (small circle), and larger tube (4.0mm-
4.8mm bore) is used, flow and tube life will be
decreased.
If the tube holder is in its outer position, for large
tubing (large circle), and smaller tube (0.5mm-
0.8mm bore) is used, there is a risk that the tube
will wander in the pumphead, and it may rupture.