Watson-Marlow 505Dz - Manual (Page 5)

5
Part 1: 505Dz Drive
Siting
To ensure correct lubrication of the gear box it is important to run the pump only
while its feet are standing on a horizontal surface.
It should be situated where there is free air to circulate around the pump and
where the tubing is allowed to enter the tube clamps without kinking.
The 505Dz can be operated at ambient temperatures from 5C to 40C. Storage
temperatures from -40C to 70C are permissible, but allow time for
acclimatisation before use.
Electrical connection
The 505Dz operates on single phase mains electricity supplies only. It is fitted
with a mains voltage selector which must be set to either 120V for 100-120V
50/60Hz supplies or 240V for 220-240V~50/60Hz supplies. For sites where the
local voltage is below this specification and the pumphead loading is high, refer
to Part 4: Reduced voltage operation.
A mains cable fitted with a moulded plug is supplied with the pump, but if another
plug is to be fitted, the colour coding of the mains lead must be observed. The
mains cable for 220-240V supplies is coded so that the live lead is coloured
brown, the neutral lead is coloured blue, and the earth lead is coloured green and
yellow. The mains cable for 100-120V supplies is coded so that the live lead is
coloured black, the neutral lead is coloured white, and the earth lead is coloured
green.
Should the pump fail to operate, check that mains electricity is available at the
unit, that the voltage selector switch is in the correct position, that the fuse is
intact and that the pump is not stalled by incorrect fitting of tubing. If the pump is
to be used under manual control and fails to operate, check that the manual
mode has been selected. If the pump is under auto control check that there is a
signal, the connections are correct and that the pump is correctly set up.
There are dangerous voltages (at mains potential) inside the unit. If
access is required, isolate the pump from the mains before removing the
cover.
Accuracy and dose time guidelines
The following gives guidelines to achieve the optimum accuracy with the dose
time.
Accuracy required +/-0.5%
Dose ml 10 25 50 100 250
Tubing i.d. mm 1.6 3.2 3.2 4.8 6.4
Approx dose time. sec 4.8 2.7 5.4 4.9 8.1
Accuracy required +/-1%
Dose ml 10 25 50 100 250
Tubing i.d. mm 3.2 3.2 4.8 6.4 8.0
Approx dose time. sec 1.1 2.7 2.5 3.2 5.0
Accuracy required +/-2%
Dose ml 10 25 50 100 250
Tubing i.d. mm 3.2 4.8 6.4 8.0 8.0
Approx dose time. sec 1.1 1.3 1.5 2.0 5.0
Installation
Failure to
operate