Watson-Marlow 603S/R - Manual (Page 8)

Page 8
Adjustment of the pumphead rollers
The two spring loaded rollers compensate for tolerance variations in the wall
thickness of tubing, eliminating the manual adjustment normally required by
peristaltic pumps, and, in general, there should be no need for the gap setting
between the rollers and track to be adjusted.
Should it ever appear that the roller arms are not equally adjusted, the original
factory setting of 5.2mm can easily be restored. There is an adjustment screw
on each of the two roller arms. Turn each screw anticlockwise until both
rollers are just in contact with the track, and then turn each screw clockwise
by five turns. Correct and equal adjustment is important. Over-occlusion will
reduce tube life. Under-occlusion will reduce pumping efficiency.
Installation
The 603S drives are fitted with pumpheads which incorporate an electrical
"safe-guard" isolation switch which will disable the drive when the pumphead
is opened or removed. To fit the pumphead first remove the cover from the
cased drive. Pass the pumphead guard switch wires through the front panel
of the drive and connect to the terminal block as shown below.
Red
Yellow
Black Red
Blue
White
603R
Pumphead
603S
Drive
Fit the track over the drive spindle and locating boss. Tighten the track
retaining screws. After checking that the drive spindle has been completely
degreased, slide the rotor into position. The rotor is attached to the drive
spindle via a split collet, and it is important that the rotor retaining screw is
fully tightened a torque of 13Nm to prevent slipping when the pump is being
used.
To remove the track, remove any tubing from the pumphead. Loosen the
rotor securing bolt and give the rotor/bolt a sharp tap to free the collet.
Release the collet, and withdraw the rotor from the shaft. Loosen the two
track securing screws and pull the track clear.