Watson-Marlow 323E, 323S, 323U and 323Du User Manual
44
The tube clamps can accommodate various tube diameters by pushing in, or pulling
out, the grip bars within the clamp. Set the clamps to apply the minimum necessary
pressure to the tubing.
Restart the pump. Free the downstream clamp for a short time, while the pump is
running, so that the tube can find its natural length. Please keep fingers clear of the
moving rotor. Shut and lock the guard after adjusting the tube.
When using Marprene tubing
Re-tension new tube after the first 30 minutes of running. Stop the pump and release
the tube clamp at the outlet of the pump. Pull any slack tube from the pumphead and
re-clamp the tube. Re-start the pump. This will correct the normal stretching that oc-
curs with new Marprene tube. The correct tension is essential for good tube life.
23.14 501RL and 501RL2 rotor settings
The 501RL and 501RL2 pumpheads are factory set to give optimum tube life with
Watson-Marlow tubing. We recommend that the rotors are not adjusted or that other
types of tubing are not used.
If the rotor needs re-aligning we recommend the rotor is returned to Watson-Marlow
for correct adjustment. Or contact our technical department for further information.
Check moving parts of the rotor from time to time for freedom of movement. Lubri-
cate pivot points and rollers occasionally with Teflon lubricating oil.
