Watson-Marlow 704U - Manual (Page 9)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.it/pdfs-global/m-704su-gb-03.htm[10/07/2012 14:21:14]
701R, 701RX and 701RG continuous tube loading
Loosen the track compression spring knobs using a 10mm A/F spanner, turning them
anticlockwise six (6) times.
Unscrew the track securing bolt and withdraw the bolt fully. Lift the track by its handle
and slide out from under the springs.
Release the tube clamps by pulling on the release levers and lift out both clamps.
Lay the tubing across the pumphead. Secure the suction side by sliding in the first tube
clamp while pulling the release lever.
Fit the delivery clamp loosely to allow any excess tubing to work its way through the
pumphead. (See Re-tensioning the tubing, below).
Slip the right hand end of the track under the springs and position the left hand end so
the track securing bolt can be inserted.
Tighten the track securing bolt with the 6mm Allen key provided.
Tighten both the track compression spring knobs to a torque of 3Nm (2.2 lb-ft) using a
10mm A/F spanner.
Note: If two pumpheads are fitted each with 25.4mm bore tubing, the maximum allowable
output pressure is 1bar (14.5 psig) per channel.
Re-tensioning the tubing
Start the pump with the guard in place, allowing any
excess tubing to work through the pumphead, then press
down the delivery end clamp firmly. Check the tube for
movement when the pump is running. If tubing moves
through the pumphead, the tube should be more firmly
clamped at the suction end. The delivery end should be
unclamped to release any excess tubing, pulled tight and
then firmly re-clamped again. Repeat as necessary.
When using Marprene continuous tubing, after the first 30
minutes of running, re-tension the tube in the pumphead by releasing the tube clamp on
the delivery side a little and pulling the tube tight. This is necessary to counteract the
normal stretching that occurs with Marprene which can go unnoticed and result in poor