Watson-Marlow 603S/R - Manual (Page 6)

Page 6
Part 2: Operation
Overview
Start the pump by turning the forward/off/reverse switch on the left hand side
of the front panel to the required direction of rotation. The preferred direction
of rotation is clockwise (with fluid entering at the bottom right of the
pumphead and exiting at the top right of the pumphead), which will ensure the
longest possible tube life. To operate against higher pressures, use
anticlockwise rotation.
The pump can be primed rapidly at its maximum speed by depressing the
max switch on the front panel. When released the switch will return to its
normal position.
The speed control of the 603S/R is 20:1 giving a speed range from
approximately 8rpm to its rated maximum speed of 165rpm. The digital read-
out shows true motor speed in revolutions per minute. A locking knob is fitted
to the potentiometer which should be pulled out to unlock, turned to give the
appropriate speed setting, and pushed in to relock.
To stop the pump, turn the forward/off/reverse switch to its central off
position. To change the direction of flow, turn the forward/off/reverse switch to
its central off position until the pumphead rotor stops, and then turn it to the
other direction of rotation.
Flow rates
The flow rates given below were obtained using Watson-Marlow 3.2mm wall
thickness Marprene tubing pumping water at 20C with negligible suction and
delivery pressures (unless otherwise stated). Where an application is critical,
the flow rate should be determined under operating conditions. The important
factors are suction and delivery pressures, temperature and fluid viscosity.
603 S/R flow rates Minimum flows 5% percent of rates given
Tube # 123 26 73 82 184
Tube Bore 4.8mm 6.4mm 9.6mm 12.7mm 15.9mm
3/16" 1/4" 3/8" 1/2" 5/8"
Litre/min 1.5 2.3 4.2 7.4 11
US gpm 0.4 0.6 1.1 2.0 2.9
603S/R flow rates against suction lift and delivery pressure. Suction lift figures
obtained with zero delivery pressure. Delivery pressure figures obtained with
zero suction lift.
Suction (feet of water)
Pressure (bar) Suction (mmHg)
Pressure (psig)
15.9
12.7
6.4
0
2
4
6
8
10
12
lit
re
/m
in
15 45 12 16 8 0 30 4
300 400 200 0 1 2 3 100
9.6
Clockwise
Anticlockwise