Watson-Marlow 205S User Manual
205S, 205U
205suca-gb-02.pdf
Declarations
Declaration of
conformity
When this pump unit is used as a stand alone pump it complies with: Machinery Directive
2006/42/EC, EMC Directive 2004/108/EC.
Responsible person: Christopher Gadsden, Managing Director, Watson-Marlow Limited, Falmouth, Cornwall TR11
4RU, England. Telephone 01326 370370 Fax 01326 376009.
Two year wa rranty
Watson-Marlow Limited warrants, subject to the conditions below, through either Watson-Marlow Limited, its
subsidiaries, or its authorised distribu tors, to re pair or r eplace free of cha rge, inc luding labou r, any part of this prod uct
which fails within two years of delivery of the product to the end user. Such failure must have occurred because of
defect in material or workmanship and not as a result of operation of the product other than in accordance with the
instructions given in this manual.
Conditions of and specific exceptio ns to the above warranty are:
Warranties purporting to be on behalf of Watson-Marlow Limited made by any person, including representatives of
Watson-Marlow Limited, its subsidiaries, or its distributors, which do not acco rd with the terms of this warranty shall
not be binding upon Watson-Marlow Limi te d unless expressly approved in writing by a Direct or or Ma na ge r of
Watson-Marlow Limited.
Information for returning pumps
Equipment which has been contaminated with, or exposed to, body fluids, toxic chemicals or any other substance
hazardous to health must be decontaminated before it is returned to Watson-Marlow or its distributor.
A certificate included at the rear of these operating instructions, or signed statement, must be attached to the outside
of the shipping carton.
This certificate is required eve n if the p ump is un us ed. If th e pump h as b ee n us ed , the fluid s that have be en in contact
with the pump and the cleaning procedure must be specified along with a statement that the equipment has been
decontaminated.
Safety
In the interests of safety, this pump and the tubing selected should only be used by competent, suitably trained
personnel after they have read a nd under stood this manual, and considered any hazard inv o lved.
Any person who is involved in the installation or maintenance of this equipment should be fully competent to carry out
the work. In the UK this person should also be familiar with the Health and Safety at Work Act 1974.
Declaration of
Incorporation
Consumable items such as tubing and rollers are excluded.
Products must be returned by pre-arrangement carriage paid to Watson-Marlow Limited, its subsidiaries, or its
authorised distributor.
All repairs or modifications must have been made by Watson-Marlow Limited, its subsidiaries, or its authorised
distributors or with the express permission of Watson-Marlow Limited, its subsidiari es, or its authorised distributors.
Products which have been abused, mis used, or subjected to malicious or accidental damage or electrical surge
are excluded.
When this pump unit is to be installed into a machine or is to be assembled with other
machines for installations, it must not be put into service until the relevant machinery has
been declared in conformity with the Machinery Directive 2006/42/EC.
There are dangerous voltages (at mains potential) inside the pump. If access is required,
isolate the pump from the mains before removing the cover.
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Recommended operating procedures
keep delivery and suction lines as short as possi ble usin g a minimum number of swept bends.
DO
use suction and delivery pipelines wi th a bore equal to or lar ger than the bor e of the tube fitted in the pumphead.
DO
When pumping
cross sectional area several times greater than the pu mping element.
fit an extra length of pump tube in the system to enable tube transfer. This will extend tube life and minimise the
DO
downtime of the pumping circuit.
keep the track and rollers clean.
DO
The self-priming nature of pe ristaltic pumps means valves are not r equired. Any valves fitted must cause no restriction
to flow in the pumping circuit.
When using Marprene tubing
the tube clamp on the delivery side a little and pulling the tube tight. This is to counteract the normal stretching that
occurs with Marprene which can go unnoticed and result in poor tube life.
Tube selection
about the compatibility of a tube material and the duty fluid, request a tube sample card for immersion trials.
Installation
The 205S and 205U are suitable for single phase mains electricity supplies only.
To ensure correct lubrication of the gearbox the pump should be run only while its feet are standing on a horizontal
surface. The pump should be positioned to allow a free flow of air around it.
Set the voltage selector to ei ther 120V for 100-120V 50/60Hz supplies or 240V for 220-240V 50/60Hz supplies.
A mains cable fitted with a moul ded plug is supplied with the pu mp. The wires are colour coded in ac cordance with
the following code:
220-240V: Live - Brown; Neutral - Blue; Earth - Green/Yellow.
100-120V: Live - Black; Neutral - White; Earth - Green.
Troubleshooting
Should the pump fail to operate, make the fo llo wing che cks to d et ermin e wh ether or not servicing is required.
Check that the power switch is on.
Check the mains supply is available at the pump.
Check the voltage selector switch is in the correct position.
Check the fuse in the mains socket.
Check that the pump is not stalled by incorrect fitting of tubing.
205S / 205U Manual operation
Press the
Change the set speed by pressing the or key. The 205S & 205U speed control ratio is 180:1.This will give a
minimum gearbox speed of 0.5rpm and a maximum of 90rpm.
Change direction by pressing the
(CW: clockwise
Select the maximum speed: press the key and the
Select the minimum speed: press the key and the
Select the low pulse speed (approx 0.01rpm) in dicated by "Lo" on the display by pressing the key again. One
more press of the key and the pump will stop and displ ay 0.0rpm.
The keypad has a locking facility to avoid resetting or tampering. If the pump is stopped, press
padlock symbol illuminates. If the pump is running, press
disabled except for
The pump can be set to automatically restart in its operating state set prior to interruption, or set so that after
power is reconnected the pump will remain stopped. To invoke the Auto-restart facility switch off power to the
pump at the mains supply. Press the
illuminates. Now press
then pressing the
Press
viscous
The chemical compatibility list published in the Watson- Marlow catalogue is only a guide. If in doubt
Man/Auto
to start the pump. Press
Start
fluids, the losses cau sed by increased friction can be overc ome by using pipe runs with a
, after the first 30 minutes of running, re-ten sion th e tube in the pumphe ad by releas ing
key (205U). When the AUT symbol is not flashing the pump is in manual mode.
CW/CCW
: counter clockwise).
CCW
and
Start
Start
key whilst turning the mains supply back on. The ! symbol will not be illuminated.
Stop
. Press these keys until the padlock symbol extinguishes to unlock the keypad.
Stop
to start the pump. This facility can be cancelled by turning the mains supply off and
Stop
key. Check the flashing
key together.
Max
key together.
Max
until the padlock symbol illuminates. All keys will be
Start
key down when the mains supply is switched back on until the ! symbol
Start
to stop the pump.
CW/CCW
symbol for actual direction setting
Stop
until the
3
205U Automatic operation
Press the
The pump is controllable by an a nalogue process sign al of up to 30V or 32mA. The pu mp will provide an increas ing
flow rate for rising control signal (non-inverted response ) or an increasing flow rate for falling control signal (inverted
response ).
Man/Auto
Signal offset
Signal range
For example, when using a 4mA to 20mA process signal:
Pump response
Non-Inverted 4mA 16mA
Inverted 20mA 16mA
For voltage modes a stable variable DC voltage source can be used in conjunction with a DC voltmeter, (maximum
30V DC). (Refer to 25D pin connector wiring detail as an example of control circuitry) Circuit impedance 100 kohms.
Polarity set for non-inverted response. Reverse polarity for inverted response.
For current modes the same DC source can be used in conjunction with a DC milliampere meter, (maximum 32mA).
(See 25 pin Dee connector detail). Circuit impedance 250 ohms. Polarity set for non-inverted response. Reverse
polarity for inverted response.
key. When the
is the process signal level which has to be reached in order for the pump rotor to start rot ating.
is the change in process signal level necessary to produce the required change in pump rotor speed.
symbol flashes the pump is in manual mode.
AUT
Signal offset Signal range
Never apply mains voltage across any pins on the 25D socket. Up to 30V may be applied across
pins 4 and 17, and 5V TTL on pins 7 and 5, but no voltage should be applied across other pins.
Permanent damage, not covered by warranty may result in both instances. Do not use the mains
power switch to control the pump for a high repetition of stop/starts. The auto-control facility
Calibration procedure
Turn the signal offset potentiometer (marked "Offset" on back panel) clockwise until the slider traverse limit is
reached and is signified by a clicking noise. Now turn the potentiometer te n turns anticlockwise. Repeat for the
signal range potentiometer. This en sures correct potentiomete r set up for calibration.
Set the process signal offset.
Turn the signal offset potentiometer clockwise to set the drive shaft speed to t he desir ed minimum.
Set the process signal at its upper rang e limit (not exceeding 30V or 32mA).
Turn the signal range potentiomete r (marked "Ra nge" on back pa nel) clock wise to set the d rive shaft sp eed to the
desired maximum.
If the process signal or dr ive speed are set above their d esignated maximums the drive will be overloaded wh ich is
signified by the flashing of
operate within these levels.
Repeat the procedure until pump response coincides exactly with the process signal.
should be used.
. This is an indication of the limiting control and speed levels of the drive. Reset to
AUT
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