Watson-Marlow 120U User Manual

Watson-Marlow 120 IP31 pumps 1

WATSON-MARLOW MANUALS

Watson-Marlow 120 cased pumps
120U/DV

m-120coversheet U-114DV-gb-02 Original instructions

Contents

1 General information
2 Operating manual
3 114DV pumphead

Watson-Marlow 120 IP31 pumps: general information 1

WATSON-MARLOW MANUALS

Watson-Marlow 120 cased pumps
Section 1 of 3: general information

m-120general-gb-01 Original instructions

Contents

1.1 Declaration of conformity 2

1.2 Declaration of incorporation 2

1.3 Three-year warranty 2

1.4 When you unpack your pump 3

1.5 Information for returning pumps 3

1.6 Peristaltic pumps - an overview 4

1.7 Safety notes and standards 5

1.8 Good pump installation practice 7

1.8.1 General
recommendations 7

1.8.2 Do’s and do not’s 8

1.9 Power supply 9

1.10 Dimensions 10

1.11 Start-up check list 11

1.12 Drive maintenance 11

1.13 Drive spares 11

1.14 Decontamination certificate 12

Watson-Marlow 120 IP31 pumps: general information 2

1.1 Declaration of
conformity

This declaration was issued for Watson­Marlow 120 pumps on April 28, 2010.
When this pump unit is used as a stand­alone pump it complies with: Machinery
Directive 2006/42/EC, EMC Directive
2004/108/EC.

This pump is ETL listed: ETL control num­ber 3050250. Cert to CAN/CSA std C22.2
No 61010-1. Conforms to UL 61010-1.

1.2 Declaration of
incorporation

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.

Responsible person: David Cole, Managing Director,
Watson-Marlow Limited, Falmouth, Cornwall TR11
4RU, England. Telephone [phone] Fax
[phone].

The information in this user guide is believed to be
correct at the time of publication. However, Watson­Marlow Limited accepts no liability for errors or
omissions. Watson-Marlow has a policy of continu­ous product improvement, and reserves the right to
alter specifications without notice. This manual is
intended for use only with the pump it was issued
with. Earlier or later models may differ.
The most up-to-date manuals appear on the
Watson-Marlow website:
http://www.wmpg.com

1.3 Three-year
warranty

Watson-Marlow Limited (“Watson-Marlow”) war­rants, subject to the conditions and exceptions
below, through either Watson-Marlow, its sub­sidiaries, or its authorised distributors, to repair or
replace free of charge, any part of the pump drive
which fails within three years of the day of manu­facture of the product. 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 normal operation as defined in this
pump manual.

Watson-Marlow shall not be liable for any loss, dam­age, or expense directly or indirectly related to or
arising out of the use of its products, including dam­age or injury caused to other products, machinery,
buildings, or property, and Watson-Marlow shall not
be liable for consequential damages, including,
without limitation, lost profits, loss of time, incon­venience, loss of product being pumped, and loss of
production. This warranty does not obligate Watson­Marlow to bear any costs of removal, installation,
transportation, or other charges which may arise in
connection with a warranty claim.

Conditions of and specific exceptions to the above
warranty are:

Conditions

 Products must be returned by pre-arrangement,

carriage-paid, to Watson-Marlow, or a Watson­Marlow approved service centre.

 All repairs or modifications must have been

made by Watson-Marlow Limited, or a Watson­Marlow approved service centre or with the
express permission of Watson-Marlow.

 Warranties purporting to be on behalf of

Watson-Marlow made by any person, including
representatives of Watson-Marlow, its sub­sidiaries, or its distributors, which do not accord
with the terms of this warranty shall not be
binding upon Watson-Marlow unless expressly
approved in writing by a Director or Manager of
Watson-Marlow.

Watson-Marlow 120 IP31 pumps: general information 3

Exceptions

 The warranty shall not apply to repairs or

service necessitated by normal wear and tear
or for lack of reasonable and proper
maintenance.

 Tubing, a consumable item, is excluded.
 Products which, in the judgment of Watson-

Marlow, have been abused, misused, or sub­jected to malicious or accidental damage or
neglect are excluded.

 The 120F is excluded from all warranty when

pumping above 1 bar. The 120U and the 120S
are excluded from all warranty when pumping
above 2 bar.

 Electrical surge as a cause of failure is

excluded.

 Chemical attack is excluded
 All pumphead rollers are excluded.
 Ancillaries are excluded.

Pumpheads used with this pump drive carry their
own warranty.

1.4 When you unpack
your pump

Unpack all parts carefully, retaining the packaging
until you are sure all components are present and in
good order. Check against the components supplied
list.

Packaging disposal

Dispose of packaging materials safely, and in accor­dance with regulations in your area. The outer
carton is made of corrugated cardboard and can be
recycled.

Inspection

Check that all components are present. Inspect
components for damage in transit. If anything is
missing or damaged, contact your distributor imme­diately.

Components supplied

 Dedicated 120F, 120S or 120U pump drive

fitted with a 114DV pumphead, 102R pump­head, 400D1, 400DM2 or 400DM3 pumphead

 The designated external DC power supply unit

for your pump with plug adaptors

 PC-readable CDROM containing these operating

instructions

 Quick Start printed manual

Note: Some versions of this product will include
components different from those listed above.
Check against your purchase order.

Storage

This product has an extended shelf life. However,
care should be taken after storage to ensure that all
parts function correctly. Long-term storage is not
recommended for peristaltic pump tubing. Please
observe the storage recommendations and use-by
dates which apply to tubing you may wish to bring
into service after storage.

1.5 Information for
returning pumps

If you wish to return a pump for service or other
reasons, contact Watson-Marlow or your distributor,
quote your pump’s serial number, and ask for a
returns number. Include this number when you ship
the pump.

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 Watson­Marlow 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 even if the pump is unused. See 1.14
Decontamination certificate.

If the pump has been used, the fluids that have
been in contact with the pump and the cleaning pro­cedure must be specified along with a statement
that the equipment has been decontaminated.

Watson-Marlow 120 IP31 pumps: general information 4

1.6 Peristaltic pumps ­an overview

Peristaltic pumps are the simplest possible pump,
with no valves, seals or glands to clog or corrode.
The fluid contacts only the bore of a tube, eliminat­ing the risk of the pump contaminating the fluid, or
the fluid contaminating the pump. Peristaltic pumps
can operate dry without risk.

How they work

A compressible tube is squeezed between a roller
and a track on an arc of a circle, creating a seal at
the point of contact. As the roller advances along
the tube, the seal also advances. After the roller has
passed, the tube returns to its original shape, cre­ating a partial vacuum which is filled by fluid drawn
from the inlet port.

Before the roller reaches the end of the track, a sec­ond roller compresses the tube at the start of the
track, isolating a packet of fluid between the com­pression points. As the first roller leaves the track,
the second continues to advance, expelling the
packet of fluid through the pump’s discharge port.
At the same time, a new partial vacuum is created
behind the second roller into which more fluid is
drawn from the inlet port.

Backflow and siphoning do not occur, and the pump
effectively seals the tube when it is inactive. No
valves are needed.

The principle may be demonstrated by squeezing a
soft tube between thumb and finger and sliding it
along: fluid is expelled from one end of the tube
while more is drawn in at the other.

Suitable applications

Peristaltic pumping is ideal for most fluids, including
viscous, shear-sensitive, corrosive and abrasive flu­ids, and those containing suspended solids. They
are especially useful for pumping operations where
hygiene is important.

Peristaltic pumps operate on the positive displace­ment principle. They are particularly suitable for
metering, dosing and dispensing applications.
Pumps are easy to install, simple to operate and
inexpensive to maintain.

Watson-Marlow 120 IP31 pumps: general information 5

This symbol, used on the
pump and in this manual,
means: Caution, refer to
accompanying documents.

This symbol, used on the
pump and in this manual,
means: Do not allow fingers
to contact moving parts.

Fundamental work
with regard to trans­portation, installation,

starting-up, mainte­nance and repair should be perfor med
by qualified personnel only. The unit
must be isolated from mains power
while work is being carried out. The
motor must be secured against acci­dental start-up.

1.7 Safety notes and
standards

In the interests of safety, this pump and the tubing
selected should only be used by competent, suitably
trained personnel after they have read and under­stood this manual, and considered any hazard
involved. If the pump is used in a manner not spec­ified by Watson-Marlow Ltd, the protection provided
by the pump may be impaired.

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.

There are moving parts inside the pumphead.
Before opening the pumphead guard or track,
ensure that the following safety directions are
followed:

 Ensure that the pump is isolated from the

mains power.

 Ensure that there is no pressure in the pipeline.
 If a tube failure has occurred, ensure that any

fluid in the pumphead has been allowed to
drain to a suitable vessel, container or drain.

 Ensure that protective clothing and eye protec-

tion are worn if non-flammable hazardous fluids
are pumped.

 Primary operator protection from rotating parts

of the pump is provided by the pumphead safe­guard. Note that safeguards differ, depending
on the type of pumphead. See the pumphead
section of this manual.

This pump must be used only for its intended
purpose.

The pump must be accessible at all times to facili­tate operation and maintenance. Access points must
not be obstructed or blocked. Do not fit any devices
to the drive unit other than those tested and
approved by Watson-Marlow. Doing so could lead to
injury to persons or damage to property for which
no liability can be accepted.

This product does not comply
with the ATEX directive and
must not be used in explosive
atmospheres.

Watson-Marlow 120 IP31 pumps: general information 6

If hazardous fluids are to be pumped, safety proce­dures specific to the particular fluid and application
must be put in place to protect against injury to per­sons.

The exterior surfaces of the pump may get warm
during operation. Do not take hold of the pump
while it is running.

The exterior surfaces of the external DC power sup­ply may get warm during operation. To be safe, let
it cool after use before handling it.

For safety, the pump must not be run without a
pumphead fitted.

Electrical safety

The power supply is Class II insulated: double
insulated with no earth connection.

The pump is Class III: safety extra-low voltage
(SELV).

Installation category (over-voltage category): II

Pump standards

EC
harmonised
standards

Safety of machinery—electrical equipment of machines: BS EN 60204-1

Safety requirements for electrical equipment for measurement, control and labora-

tory use: IEC/EN/UL 61010-1 incorporating A2 Category 2, Pollution degree 2

Degrees of protection provided by enclosures (IP code):

BS EN 60529 amendments 1 and 2

Conducted emissions: BS EN 55011 A1 and A2 Class A, called by BS EN61000-6-4

Radiated emissions: BS EN 55011 A1 and A2 Class A, called by BS EN61000-6-4

Electrostatic discharge: BS EN 61000-4-2 Criteria C

Radiated RF immunity: BS EN 61000-4-3 A1 and A2, called by BS EN 61000-6-2

Fast transient burst:

BS EN 61000-4-4 A1 and A2, Level 3 (2kV), called by BS EN 61000-6-2

Surge immunity: BS EN 61000-4-5 A1 and A2, called by BS EN 61000-6-2

Conducted RF immunity: BS EN 61000-4-6, called by BS EN 61000-6-2

Pumps and pump units for liquids—common safety requirements: BS EN 809

Other
standards

CAN/CSA-C22.2 No 61010-1

Conducted emissions FCC 47CFR, Part 15.107

Radiated emissions FCC 47CFR, Part 15

Power supply standards

Safety standards

UL 60950-1

CSA-C22.2

TUV EN 60950-1

EMC

EN 55022 Class B, FCC part 15/CIS PR 22 Class B

EN 61000-3-2, 3

EN61000-4-2, 3, 4, 5, 6, 8 and 11 Criteria A

Watson-Marlow 120 IP31 pumps: general information 7

Power supply specifications

Insulation category Class II: double insulated, no earth

Mains voltage/frequency

90-264VAC, 47-63Hz, 1ph

Mains current 0.7A @ 100VAC; 0.4A @ 230VAC

Output voltage 24VDC

Output power 24W @ 30C; 18W @ 40C

Protection Hiccup mode: recovers automatically after fault removed

Overload protection 110%-200% of rated output power

Working temperature -10C to 50C, 14F to 122F

Operating humidity 20% to 90% RH, non-condensing

Over-voltage 115% to 135%

Note: Pump specifications are included in Section 2

of these instructions.

1.8 Good pump
installation practice

1.8.1 General
recommendations

Position

The 120 pump must be mounted in the upright posi­tion and not inverted or placed on its rear face.

A correctly engineered installation will promote long
tube life. Site the pump on a flat, horizontal, rigid
surface, free from excessive vibration, to ensure
correct lubrication of the gearbox. Allow a flow of air
around the pump to ensure that heat can be dissi­pated. Ensure that the temperature around the
pump does not exceed 40C.

It is possible to stack only one other 120 pump on
top of this pump. The case’s third row of feet ensure
ventilation between pumps and allow the top pump
to be set back a little to give clear access to the
lower pump’s keypad. You can place other equip­ment on the pump’s upper surface as long as the
ambient temperature does not exceed 40C.

Emergency disconnection

The pump's external DC power supply is the discon­necting device, which must be readily identifiable
and easily reached, for isolating the motor drive
from the mains supply. Note: There may be a slight
delay after isolating the pump before the pump
stops.

Watson-Marlow 120 IP31 pumps: general information 8

Valves

Peristaltic pumps are self-priming and self-sealing
against backflow. No valves are required in inlet or
discharge lines. Valves in the process flow must be
opened before the pump operates. Users are
advised to fit a pressure relief device between the
pump and any valve on the discharge side of the
pump to protect against damage caused by acciden­tal operation with the discharge valve closed.

Pressure advice

In most circumstances,
rotor and tube life are
maximised if the pump­head is run slowly, partic­ularly when pumping at
high pressure. Do not
exceed the pressures
shown here.

1.8.2 Do’s and do not’s

Do not build a pump into a tight location without

adequate airflow around the pump.

Do not strap together the control and and external
DC power supply cables.

Do keep delivery and suction tubes as short and
direct as possible - though ideally not shorter than
1m - and follow the straightest route. Use bends of
large radius: at least four times the tubing diame­ter. Ensure that connecting pipework and fittings are
suitably rated to handle the predicted pipeline pres­sure. Avoid pipe reducers and lengths of smaller
bore tubing than the pumphead section, particular­ly in pipelines on the suction side. Any valves in the
pipeline (not usually needed) must not restrict the
flow. Any valves in the flow line must be open when
the pump is running.

Do use suction and delivery pipes equal to or larg­er than the bore of the tube in the pumphead. When
pumping viscous fluids use pipe runs with a bore
several times larger than the pump tube.

Do site the pump at or just below the level of the
fluid to be pumped if possible. This will ensure
flooded suction and maximum pumping efficiency.

Do keep the pumphead track and all moving parts
clean and free from contamination and debris.

Do run at slow speed when pumping viscous fluids
(though see Pressure advice in 1.8.1 General rec-
ommendations). Flooded suction will enhance
pumping performance in all cases, particularly for
materials of a viscous nature.

120 pumps may be wiped with a damp cloth, but
should not be hosed or immersed. The front of the
pump is further protected against light spillages.

When using Marprene or Bioprene continuous
tubing, do re-tension the tube after the first 30 min­utes of running.

Tube selection: The chemical compatibility lists
published in Watson-Marlow publications are
guides. If in doubt about the compatibility of a tube
material and the duty fluid, request a Watson­Marlow tube sample card for immersion trials.

120 pump RMS
pressure ratings

120F + any
pumphead

0 bar

120S+102R
120S+400DM2
120S+400DM3
120U+114DV
120U+400D1
120U+400DM2
120U+400DM3

2 bar

Watson-Marlow 120 IP31 pumps: general information 9

1.9 Power supply

The 120 pump is suitable for single-phase mains
electricity supplies only via the double-insulated
(Class II) 90-264VAC-to-24VDC mains adaptor. Use
only the approved 24VDC Meanwell type GE24I24­P1JK DC adaptor or the Powersolve ESA24-24 DC
adaptor supplied with the pump.

A well regulated electrical mains supply is required
along with cable connections conforming to the best
practice of noise immunity. It is not recommended
to site these drives alongside “dirty” electrical mains
supplies such as 3-phase contactors and inductive
heaters without special attention being paid to
unacceptable mains-borne noise.

To prepare your power supply

 Select the mains input adapter appropriate to

your region—UK, US, Australia or Europe—and
slide it into position on the rear of the unit.
Ensure it clicks into place.

Stop/start power cycles: Do not power up/power
down for more than 100 starts per hour. A mini­mum interval of 3 seconds is required between power
cycles.

We recommend using com­mercially available supply
voltage surge suppression
where there is excessive

electrical noise.

USUK EuroAus

Watson-Marlow 120 IP31 pumps: general information 10

Unit weights

Drive

only+114DV+ 102R+ 400D1+ 400DM2+400DM3

1.4kg 1.5kg 1.55kg 1.65kg 1.7kg 1.7kg

1.10 Dimensions

IP (ingress protection) definition

1st Digit: 3 2nd Digit: 1

Protected against
ingress of solid objects
with a diameter of more
than 2.5mm. Tools,
wires etc with a
thickness of more than

2.5mm are prevented
from approach

Protection against
dripping water falling
vertically. No harmful
effect must be produced

This pump’s ingress protection is rated IP31.

120 pump drive with
102R pumphead

120 pump drive with
114DV pumphead

Note: A 120U pump drive is shown here. All
drives have the same dimensions and weight
(apart from drive shaft dimensions).

120 pump drive with
400D1 pumphead

120 pump drive with
400DM2 pumphead

120 pump drive with
400DM3 pumphead

Watson-Marlow 120 IP31 pumps: general information 11

1.11 Start-up check
list

Note: See also section 2 (120F, 120S or 120U

drives) and section 3 (102R, 114DV or 400 series
pumpheads) of these instructions.
 Ensure that proper connections are achieved

between the pump tube and suction and dis­charge piping.

 Ensure proper connection has been made to the

external DC power supply unit, and to a suit­able power supply.

 Ensure that the recommendations in the section

1.8 Good pump installation practice are fol-
lowed.

1.12 Drive
maintenance

There are no user-serviceable parts inside the
pump. The unit should be returned to Watson­Marlow or its appointed agents or distributors
for service.

1.13 Drive spares

Dedicated external DC power supply unit and
plug adaptors: MN2634B

Foot: FB0012

Watson-Marlow 120 IP31 pumps: general information 12

1.14 Decontamination
certificate

In compliance with the UK Health and Safety at
Work Act and the Control of Substances Hazardous
to Health Regulations, you are required to declare

the substances which have been in contact with
product(s) you return to Watson-Marlow or its sub­sidiaries or distributors. Failure to do so will cause

Your name Company

Address

Postcode/zip Country

Telephone Fax

Product type Serial number

To speed the

repair, please

describe all

known faults

The product has ...

I Been used II Not been used

If the product has been used, please complete all the following sections.
If the product has not been used, please just sign this form.

Names of

chemicals handled

with product(s)

Precautions to be
taken in handling

these chemicals

Action to be taken

in the event of

human contact

I understand that the personal data collected will be kept confidentially
in accordance with the UK Data Protection Act 1998.

RGA number

Signature Your position

Date

Please print out, sign and fax to Watson-Marlow Pumps at [phone].

delays. Please ensure that you fax us this form and
receive an RGA (Returned Goods Authorisation)
before you despatch the product(s). A copy of this
form must be attached to the outside of the pack­aging containing the product(s). Please complete a
separate decontamination certificate for each prod­uct.
You are responsible for cleaning and decontaminat­ing the product(s) before return.

Watson-Marlow 120U IP31 pumps: operating instructions 1

WATSON-MARLOW MANUALS

Watson-Marlow 120U cased pumps
Section 2 of 3: Operating manual

m-120u-ip31-gb-01 Original instructions

Contents

2.1 Pump specifications 2

2.2 Good pump installation practice 3

2.3 Switching the pump on 3

2.4 Manual operation 4

2.4.1 Keypad functions in
manual mode 4

2.4.2 Start and stop 4

2.4.3 Increase and decrease
pump speed 4

2.4.4 Change direction of
rotation 5

2.4.5 Prime the pump 5

2.4.6 Run the pump at
maximum speed 5

2.4.7 Run the pump at
minimum speed 5

2.4.8 Switch to automatic
control 5

2.4.9 Auto-start 5

2.4.10 Keypad beep 5

2.4.11 ROM 5

2.4.12 Keypad lock 6

2.4.13 Defaults 6

2.4.14 Set maximum allowed
speed 6

2.5 Remote control wiring 7

2.6 Remote/automatic control and
operation 9

2.6.1 Remote stop/start

when AUTO has not
been pressed 9

2.6.2 Direction 9

2.6.3 DC tacho output 10

2.6.4 Digital alarm output 10

2.6.5 Supply voltages 10

2.6.6 How to get into auto

speed operation 11

2.6.7 Remote stop/start

when AUTO has been
pressed 12

2.6.8 Speed: analogue input 12

2.6.9 Speed: remote

potentiometer input 13

2.6.10 Set maximum allowed

speed 13

2.7 Troubleshooting 14

2.7.1 Error codes 14

Watson-Marlow 120U IP31 pumps: operating instructions 2

2.1 Pump
specifications

A nameplate is fixed to the rear of the pump. It con­tains manufacturer and contact details, product ref­erence number, serial number and model details.

120U

This pump can be controlled from the keypad or
remotely. It features:

Manual control

Speed adjustment; run and stop; direction con­trol; “max” key for rapid priming; “auto start”
for automatic power recovery; “auto” key for
changing between manual and auto control

Remote digital control

The pump can be digitally controlled with a
contact closure or logic input signal

Analogue control

The pump speed can be controlled through an
analogue signal input of 4-20mA or 0-10V

Outputs

Logic output designated for an alarm only
DC Tacho output

Pump specifications

Control range (turndown ratio)

Manual control:

With 102R: 0.1-32 rpm (320:1)
With 114DV: 0.1-200 rpm (2,000:1)
With 400D1: 0.1-200 rpm (2,000:1)

With 400DM2: 0.1-100 rpm (1,000:1)
With 400DM3: 0.1-100 rpm (1,000:1)

Auto control:

With 102R: 0.01-32 rpm (3,200:1)
With 114DV: 0.01-200 rpm (20,000:1)
With 400D1: 0.01-200 rpm (20,000:1)

With 400DM2: 0.01-100 rpm (10,000:1)
With 400DM3: 0.01-100 rpm (10,000:1)

Power supply DC input 24V @ 1A

Software version Accessible through combination keypress

Enclosure rating

IP31 to BS EN 60529. Equivalent to NEMA 2, suiable for indoor

use. Protected against dripping water and falling dirt. May be

wiped with a damp cloth, but should not be immersed

Pumphead options 114DV, 102R, 400D1, 400DM2 and 400DM3

Operating temperature range 5C to 40C, 41F to 104F

Storage temperature range -25C to 65C, -13F to 149F

Maximum altitude 2,000m, 6,560ft

Humidity (non-condensing) 80% up to 31C, 88F, decreasing linearly to 50% at 40C, 104F

Weight See Section 1, General information

Noise <60dB(A)

Function comparison, models 101U and 120U

Function 101U 120U

Analogue
input

0-30mA and
0-30V

4-20mA and 0-10V

Range and
off-set
trimming

possible

can only set the
maximum speed

Signal
inversion

possible not possible

Tacho
output

+5V and –5V at
maximum speed

5V at maximum
allowed speed

Input
impedance

255Ω 250Ω

Max speed
options

2 rpm or
32 rpm, model­dependant

single speed range,
pumphead­dependant

Speed
increments

10% or 1%
increments

0.1 rpm in manual
mode and 0.01 rpm
in analogue mode

Analogue
control

2,000:1
control ratio

20,000:1
control ratio

Watson-Marlow 120U IP31 pumps: operating instructions 3

2.2 Good pump
installation practice

The 120 pump must be mounted in the upright
position and not inverted or placed on its rear face.

2.3 Switching the
pump on

The pump is powered by a dedicated 24V external
DC power supply unit which is supplied with the
pump.

Note: If you plan to operate the pump by
controls external to the pump, the 15-way
D-connector must be connected before power
is supplied to the pump (see 2.5 Automatic

control wiring and 2.6 Remote/automatic
control and operation). If any change is made

later to the 15-way D-connector, it must be
reconnected before power is supplied to the
pump.

 Plug the power supply’s output connector into

the power socket on the rear of the pump.

 Plug the power supply unit into a mains power

outlet and switch on. The pump performs a
power-on test to confirm proper functioning of
the memory and hardware. If a fault is found,
an error message is displayed. See 2.7.1 Error
codes.

 Load the pumphead with tube: see Section 3 of

these instructions.

The pump is now ready to operate according
to the default settings.

Operating parameters may be changed by means of
key-presses. See 2.4 Manual operation.

To return the pump to its default settings, press and
hold DIRECTION on power up.

120U start-up defaults

Set speed 32 rpm

Maximum speed

Maximum possible speed
depending on pumphead

Direction Clockwise

Mode Manual

Display Speed in rpm

Display and LEDs On

Pump status Stopped

Keypad lock Off

Auto-start Off

Beeper On

Max (prime) Maximum possible speed

Scrolling
increment

0.1 rpm

Remote stop Open=run

Output 1 General alarm

Watson-Marlow 120U IP31 pumps: operating instructions 4

2.4 Manual operation

2.4.1 Keypad functions in
manual mode

All settings and functions of the pump in manual
mode are set and controlled by means of key press­es. Immediately after power-up, the currently
selected rotation speed is indicated on the display.
Start-stop status, auto-start status, automatic con­trol status and direction of rotation are indicated by
LEDs beside their keys; keypad lock status is indi­cated by an LED beside the padlock symbol.

Note: Beeps sound to confirm the function of con­trol keys only if keypad beep has not been turned
off (see 2.4.10 Keypad beep).

Note: Remote stop/start, direction, DC tacho out­put and digital alarm output are active in both man­ual and auto modes.

2.4.2 Start and stop

To start the pump at the speed and in the direction
indicated (see 2.4.4 Change direction of rotation),
press the green START key on the keypad. A beep
sounds and the LED beside the START key illumi­nates to confirm that the pump is operating. We
recommend that the speed is reduced to a minimum
(0.1 rpm) before starting the pump.

To stop the pump, press the red STOP key on the
keypad. A beep sounds, the pump stops and the
LED beside the START key goes out to confirm that
the pump is stopped. The display continues to show
the previous speed and direction. The pump will
return to this speed and direction when the START
key is pressed again.

2.4.3 Increase and
decrease pump speed

Press and hold UP to increase the speed shown on
the display in minimum steps of 0.1 rpm (unless the
speed displayed is already the maximum allowed
speed). Beeps sound while the key is held. If the
pump is then started by pressing the START key, it
operates at the new speed. If the pump is running
when UP is pressed, the change takes effect imme­diately.

The pump can be stopped at
all times by pressing STOP
on the keypad, whether it is
in manual or auto mode.

Watson-Marlow 120U IP31 pumps: operating instructions 5

Press and hold DOWN to decrease the speed shown
on the display in minimum steps of 0.1 rpm. Beeps
sound while the key is held. If the pump is then
started by pressing the START key, it operates at
the new speed. The minimum running speed possi­ble is 0.1 rpm. If the pump is running when DOWN
is pressed, the change takes effect immediately.

Note: You can reduce the pump speed from

0.1 rpm to 0 rpm by a further press on the DOWN
key. The LED beside the START key goes out. The
pump is still in the running state and you can press
the UP key to return the pump to the minimum
speed.

2.4.4 Change direction of
rotation

Press DIRECTION to toggle the sense of rotation.
A beep sounds and the LED beside the clockwise­pointing arrow to the key’s right illuminates to
indicate clockwise rotation; the LED beside the
counter-clockwise-pointing arrow to the key’s left
illuminates to indicate counter-clockwise rotation. If
the pump is then started by pressing the START
key, it rotates in the new direction. If the pump is
running when DIRECTION is pressed, the change
takes effect immediately.

2.4.5 Prime the pump

While pressed, MAX operates the pump at the max­imum allowed speed and in the direction indicated.
Beeps sound while the key is held. When released,
the pump returns to its previous status. Priming can
be achieved by pressing the MAX key until fluid
flows through the pump and reaches the point of
discharge, and then releasing the MAX key.

2.4.6 Run the pump at
maximum allowed speed

Press MAX and UP together to set the pump to
maximum allowed speed. Beeps sound while the
keys are held. If the pump is then started by press­ing the START key, it operates at the new speed. If
the pump is running when MAX and UP are
pressed, the change takes effect immediately.

2.4.7 Run the pump at
minimum speed

Press MAX and DOWN together to set the pump to
minimum speed. Beeps sound while the keys are
held. If the pump is then started by pressing the
START key, it operates at the new speed. If the
pump is running when MAX and DOWN are
pressed, the change takes effect immediately.

2.4.8 Switch to automatic
control

Press AUTO to toggle the pump into and out of
analogue control. A beep sounds and the LED beside
the AUTO key illuminates to confirm that the pump
is under analogue control, and will respond to any
remote/auto signal. When started, the pump runs at
the speed set by any analogue signal applied to the
pump, and in the direction indicated.

When toggled from automatic control to manual
control, the pump retains its speed setting.

2.4.9 Auto-start

Press AUTO START to toggle the auto-start func­tion on and off. A beep sounds and the LED beside
the AUTO START key illuminates to indicate that
the auto-start function is on. If auto-start is on, the
pump starts in the last selected condition following
a power supply interruption. If auto-start is off, the
pump waits for a press on the START key before
starting in the last selected condition following a
power supply interruption.

2.4.10 Keypad beep

While the pump is stopped, press DIRECTION and
UP together to toggle the keypad beep on and off.

2.4.11 ROM

While the pump is stopped, press DIRECTION and
DOWN together to display the pump’s ROM version.

Beeps sound while the keys are held.

Watson-Marlow 120U IP31 pumps: operating instructions 6

2.4.12 Keypad lock

The keypad can be locked to prevent changes to
pump speed or other settings, and make it possible
only to start or stop the pump.

To lock the keypad while the pump is running:
 Hold down the START key for more than one

second. A beep sounds, the LED beside the
padlock symbol flashes briefly then illuminates
and the keypad is locked. Only the START and
STOP keys function. If another key is pressed
while the keypad is locked and the pump is
running, a message is briefly displayed: Hold

Strt. This tells the user to press and hold the
START key for more than one second to unlock

the keypad and make the required key
available.

To lock the keypad while the pump is stopped:
 Hold down the STOP key for more than one

second. A beep sounds, the LED beside the
padlock symbol flashes briefly then illuminates
and the keypad is locked. Only the START and
STOP keys function. If another key is pressed
while the keypad is locked and the pump is
stopped, a message is briefly displayed: Hold

Stop. This tells the user to press and hold the
STOP key for more than one second to unlock

the keypad and make the required key
available.

To unlock the keypad while the pump is running:
 Hold down the START key for more than one

second. A beep sounds, the LED beside the
padlock symbol flashes briefly then goes out
and the keypad is unlocked.

To unlock the keypad while the pump is stopped:
 Hold down the STOP key for more than one

second. A beep sounds, the LED beside the
padlock symbol flashes briefly then goes out
and the keypad is unlocked.

Note: In auto mode only, START pressed for

more than 1 second toggles the keypad lock on
or off.

2.4.13 Defaults

To return the pump to its default settings, press
and hold DIRECTION on power up. See 2.3
Switching the pump on.

2.4.14 Set maximum
allowed speed

While the pump is stopped, press AUTO and UP
together to put the pump into Setup mode. The
display shows the current maximum allowed speed,
and flashes to indicate that the pump is in Setup
mode. Use the UP and DOWN keys to select a new
maximum allowed speed. Press AUTO to confirm
the new maximum allowed speed. Press STOP to
escape from the the change sequence and revert to
the previous maximum allowed speed. The
minimum maximum speed is 2 rpm.

Watson-Marlow 120U IP31 pumps: operating instructions 7

2.5 Remote control
wiring

Interfacing the pump with other devices is by
means of a female 15-pin D-connector at the rear of
the pump.

A mating male connector, screened for EMC compat­ibility, must be conventionally soldered to a
screened control cable.

Recommended control cable: 7 strands 0.2mm,
24AWG, screened, circular, up to 15-core.

The 15-way D-connector must be connected
before power is supplied to the pump. If any
change is made later to the 15-way D-connec­tor, it must be re-connected before power is
supplied to the pump.

This pump passes all EMC compatibility require­ments with up to 3m (10ft) of the cable type
specified above. Beyond this distance it is the user’s
responsibility to ensure the pump is safe and
reliable under remote and automatic control.

To minimise EMC interferance the wiring to the 15­pin D-connector must be screened. The screen must
be earthed at the signal end of the wiring. To further
reduce EMC the screened wiring must be threaded
once or twice through a ferrite tubular cable shield
or a hinged clamp core.

The signal ground and DC supply ground lines on
this pump are isolated from ground by the external
DC supply unit. It can be connected to isolated 0V
or grounded 0V interfaces. The TTL (transistor
transistor logic) output is composed of two states:
nominally 0V and 5V; but in practice <0.4V
(<16mA) and 2.4-5V (<0.4mA). They are not
suitable for driving relays.

Pin

no

Input or output Function Referenced to

1 Digital input

Analogue Voltage
or Current Signal
Input Select

Connect to Digital
Ground for Current

2 Analogue input

Analogue Voltage
or Current Signal
Input (+)

Referenced to
Analogue Ground

3 Ground Analogue Ground (0V)

4 Digital input

Remote Direction
Enable

Connect to Digital
Ground to enable

5 Digital input Remote Direction

Connect to 5VDC
for counter-clock­wise operation

7 Digital input

Manual or Auto
Mode Select

Connect to 5VDC
Supply for Auto
Mode

8 Digital input Remote Start/Stop

Connect to 5VDC
Supply to stop

9 Analogue output

Analogue Tacho
Output

Referenced to
Analogue Ground
(0-5VDC signal)

10 Ground Analogue Ground (0V)
11 Ground Digital Ground (0V)
12 Ground Digital Ground (0V)

13 DC supply 5VDC Supply (+)

Referenced to
Ground

14 Digital output

Alarm Output (5V
TTL)

Referenced to
Digital Ground

15 DC supply 12VDC Supply (+)

Referenced to
Ground

Note: The pin allocation of the 120U differs
from the pin allocation of the 101U and the
401U. See overleaf for details.

Watson-Marlow 120U IP31 pumps: operating instructions 8

Pin no 101U 401U 120U

1

Analogue input current
resistor (link to 0V)

Analogue input current
resistor

Analogue voltage/current
signal selection

2 Analogue speed input Analogue speed input (+10V)

Analogue speed input
(voltage/current)

3 Tacho output (0-5VDC) Supply +5V Ground 0V (analogue)

4 Remote direction enable Remote direction (reverse) Remote direction enable

5 Remote direction control Remote direction (forwards)

Remote direction selection
(CW/CCW)

6 Remote auto/man enable Linked for current offset For future use

7 Remote auto/man control Linked for current offset Remote auto/man selection

8 Remote stop Ground 0V Remote stop

9 Tacho output (0-5VDC) Analogue control (+1V) Tacho output (0-5VDC)

10 Ground 0V Supply +18V Ground 0V (analogue)

11 Ground 0V Remote auto/man control Ground 0V (digital)

12 Ground 0V Not connected Ground 0V (digital)

13 Supply +5V Not connected Supply +5V

14 Supply -5V Not connected Alarm output (5V TTL)

15 Supply +12V Ground 0V Supply +12V

Pin allocations, models 101U, 401U and 120U

Watson-Marlow 120U IP31 pumps: operating instructions 9

2.6 Remote/automatic
control and operation

The pump can be operated by controls external to
the pump: manually by a switch or potentiometer;
or by an automatic control station. You need not

press the AUTO key unless you wish to control
speed remotely: remote stop/start, direction,
DC tacho output and digital alarm output are
active in both manual and auto modes.

Check that the pump is ready to run before
remote/automatic operation. Signals may start the
pump without warning.

2.6.1 Remote stop/start
when AUTO has not been
pressed

Fit a switch between pins 8 and 13.

OR:

Apply a TTL logic signal to pin 8, ground to pin 12.

Press START on the keypad to enable remote
stop/start.

See 2.6.6 Remote stop/start for remote stop/start
instructions after AUTO has been pressed.

2.6.2 Direction

For remote direction change:

Enable remote direction control and disable the
DIRECTION key on the keypad by fitting a link
between pins 4 and 11.

Fit a switch between pins 5 and 13.

OR:

Apply a TTL logic signal to pin 5, ground to pin 12.

Never apply mains voltage
to the 15-way D connector.
Apply the correct signals to
the pins shown below. Limit
signals to the maximum
values shown. Do not apply
voltage across other pins.
Permanent damage, not
covered by warranty, may
result.

The pump can be stopped at
all times by pressing STOP
on the keypad, whether it is
in manual or auto mode.

Watson-Marlow 120U IP31 pumps: operating instructions 10

2.6.3 DC tacho output

For DC tacho output:

Connect external instrumentation: positive terminal
to pin 9; negative terminal to pin 3.

Note: This output is designed for low-resistance
equipment inputs of nominally 1kΩ.

2.6.4 Digital alarm output

For digital alarm output (system errors only):

Connect an external TTL device: positive terminal to
pin 14; negative terminal to pin 12.

2.6.5 Supply voltages

+5VDC is available on pin 13. +12VDC is available
on pin 15. Tolerances better than 10%. Both sup­plies are stabilised. Ground to pin 11 or pin 12.

DC
Voltage

Max
load

Pin Typical use

+5V 10mA 13

Voltage supply for
inputs using remote
switch.

+12V 10mA 15

Possible voltage sup­ply for inputs using
remote switch.

Watson-Marlow 120U IP31 pumps: operating instructions 11

2.6.6 How to get into
auto speed operation

Check that the pump is ready to run before
remote/automatic operation. Signals may start the
pump without warning.

 Press the AUTO key to select automatic

operation. A beep sounds and the LED beside
the AUTO key illuminates to indicate that the
pump is under automatic speed control.

 The pump responds to the analogue signal as

soon as this is done. Auto-start is automatically
switched on. The only keys active are STOP,
AUTO and DIRECTION.

 If remote direction input is active and the

direction-enable link is applied, the
DIRECTION key is disabled. If keypad lock is
set, only STOP and START are active. STOP
stops the pump and switches it to manual
control (or, if the pump was put into auto mode
by remote switching, to the auto-stop
state—see Alternatively, below). START
pressed for more than 1 second toggles the
keypad lock on or off.

 The pump displays the speed at which the

pump will rotate after receiving a high signal
(20mA or 10V).

Alternatively ...

A remote signal can select auto or manual control,
overriding the keypad AUTO key setting.

Fit a switch or link between pins 7 and 13.

OR:

Apply a TTL logic signal to pin 7, ground to pin 12.

Watson-Marlow 120U IP31 pumps: operating instructions 12

2.6.7 Remote stop/start
when AUTO has been
pressed

Fit a switch between pins 8 and 13.

OR:

Apply a TTL logic signal to pin 8, ground to pin 12.

See 2.6.1 Remote stop/start for remote stop/start
instructions if AUTO has not been pressed.

2.6.8 Speed: analogue
input

When AUTO has been pressed, pump speed can be
controlled remotely by an analogue process signal
within the range 0-10V; or 4-20mA. The pump
provides an increasing flow rate for a rising control
signal.

Voltage signal

0-10VDC. Input impedance: 24kΩ.

Connect a voltage source: negative terminal to pin
10; positive terminal to pin 2.

Current signal

4-20mA. Input resistance: 250Ω.

Fit a link between pins 1 and 11.

Connect a current source: negative terminal to pin
10; positive terminal to pin 2.

Watson-Marlow 120U IP31 pumps: operating instructions 13

2.6.9 Speed: remote
potentiometer input

For remote potentiometer speed input, when AUTO
has been pressed:

Connect a potentiometer (±5% tolerance recom­mended) between pins 12 and 15, with a resistor in
series on the Max side of the potentiometer. Typical
potentiometer value is 1kΩ-5kΩ. The resistor value
should be 180R when a 1kΩ potentiometer is used;
the resistor value should be 1kΩ when a 5kΩ
potentiometer is used.

Note: The resistor value may have to be adjusted
higher or lower to achieve the full pump speed
range.

Connect the potentiometer wiper to pin 2.

Note: Set the pump to analogue control. Do not
apply a voltage or current control input signal at the
same time. Performance will depend on the
tolerances of components used.

2.6.10 Set maximum
allowed speed

While the pump is stopped, press AUTO and UP
together to put the pump into Setup mode. The dis­play shows the current maximum allowed speed,
and flashes to indicate that the pump is in Setup
mode. Use the UP and DOWN keys to select a new
maximum allowed speed. Press AUTO to confirm
the new maximum allowed speed. Press STOP to
escape from the the change sequence and revert to
the previous maximum allowed speed. The
minimum maximum speed is 2 rpm.

Note: To increase the control resolution when the
maximum speed of the pump is not required,
decrease the the maximum allowed speed. This is
particularly useful if you are replacing a 101U/R
2 rpm pump with a higher-speed 120U/R pump.

200 rpm

2 rpm
0 rpm

Voltage0V 10V

Max allowed

200 rpm

Speed

Max allowed

2 rpm

Watson-Marlow 120U IP31 pumps: operating instructions 14

2.7 Troubleshooting

If the pump fails to operate, make the following
checks:

 Check that the dedicated external DC power

supply unit is plugged into a working mains
power source which is switched on. Check that
the power supply unit’s LED is illuminated (if
fitted).

 Check that the dedicated external DC power

supply unit’s output connector is plugged into
the pump.

If the pump runs but there is little or no flow, make
the following checks:

 Check that tubing is installed in the pumphead;

check that it is the correct wall thickness:

1.6mm. See section 3 of these instructions.

 Check that the tube is not split or burst.
 Check for any kinks or blockages in the lines.
 Check that any valves in the lines are open.
 Check that the rotor is in the pumphead, that

it rotates and that the rollers are in good
condition.

 Check that fluid is supplied to the pump.

Error
code

Error condition Suggested action

Er 0 FRAM write error Attempt to reset by switching power OFF / ON. Or seek support

Er 1 FRAM corruption Attempt to reset by switching power OFF / ON. Or seek support

Er 2

FLASH write error
during drive update

Attempt to reset by switching power OFF / ON. Or seek support

Er 3 FLASH corruption Attempt to reset by switching power OFF / ON. Or seek support

Er 4 FRAM shadow error Attempt to reset by switching power OFF / ON. Or seek support

Er 9 Motor stalled

Stop pump immediately. Check pumphead and tube. Power OFF/ON

may reset. Or seek support
Er10 Tacho fault Stop pump immediately. Power OFF/ON may reset. Or seek support

Er14 Speed error Stop pump immediately. Power OFF/ON may reset. Or seek support

Er15 Over current

Stop pump immediately. Check system. Power OFF/ON may reset.

Or seek support

Er16 Over voltage

Stop pump immediately. Check mains voltage selector switch. Check

supply. OFF/ON may reset. Or seek support

Er17 Under voltage

Stop pump immediately. Check mains voltage selector switch. Check

supply. OFF/ON may reset. Or seek support

Er19 Over temperature Stop pump immediately. Turn OFF. Seek support

Er20 Signal out of range

Check analogue control signal range. Trim signal as required. Or

seek support
Er21 Over signal Reduce the analogue control signal

Er30 Over power

Turn OFF. Check power supply. Check pumphead and tubing. Wait

30 minutes. Power ON may reset. Or seek support

Err General error condition Turn OFF. Seek support

2.7.1 Error codes

If an internal error occurs, an error screen is
displayed.
Note: Signal out of range and Over signal
report the nature of an external signal.

Watson-Marlow 114DV pumphead: operating instructions 1

WATSON-MARLOW MANUALS

Watson-Marlow 120 cased pumps
Section 3 of 3: 114DV pumpheads

m-114pumphead for 120-gb-02 Original instructions

Contents

3.1 Product specifications 2

3.2 114DV safety information 2

3.3 114DV pumping conditions:
pressure and viscosity 3

3.4 114DV pumphead installation 3

3.5 Tube holder positioning 4

3.5.1 Tube holder

repositioning 5

3.6 Tube loading and removal 6

3.7 114DV pumphead spares 6

3.8 114DV performance data 7

3.9 114DV continuous tubing
product codes 8

3.10 Trademarks 8

3.11 Do not use pumps in patient­connected applications 8

3.12 Publication history 8

Watson-Marlow 114DV pumphead: operating instructions 2

3.1 Pumphead
specifications

The 114DV pumphead has four rollers and accepts

1.6mm wall thickness tubing only. New tubing can
be easily loaded into the flip top design. The top
closes with a “clamp and stretch” action to locate
the tube in the correct position and with the correct
tension.

3.2 114DV safety
information

There are moving parts inside the pumphead.
Before opening the pumphead track, ensure
that the following safety directions are
followed.

 Ensure that the pump is isolated from the

mains power.

 Ensure that there is no pressure in the pipeline.
 If a tube failure has occurred, ensure that any

fluid in the pumphead has been allowed to
drain to a suitable vessel, container or drain.

 Protective clothing and eye protection must be

worn if hazardous fluids are pumped.

This symbol, used on the
pump and in this manual,
means: Caution, refer to
accompanying documents.

This symbol, used on the
pump and in this manual,
means: Do not allow fingers to
contact moving parts.

Watson-Marlow 114DV pumphead: operating instructions 3

3.3 114DV pumping
conditions: pressure
and viscosity

 All pressure values in this operating instruction,

from which performance life figures have been
calculated, relate to root mean square (RMS)
pressure, giving a more relevant pressure value
than figures quoted in terms of peak pressure.
The RMS pressure is similar to the value you
would read on a damped analogue gauge.

 Ensure that there is always a minimum of one

metre of flexible tubing connected to the
discharge side of the pumphead. This helps to
minimise any impulse losses and pulsation in
the pipeline. This is especially important with
viscous fluids and rigid pipework.

3.4 114DV pumphead
installation

A correctly engineered installation will promote the
best possible tube life, so please ensure that the
following guidelines are followed:
 Avoid tight pipeline bends, pipe reducers and

excessive lengths of smaller bore tubing than
that in the pumphead, particularly in pipelines
on the suction side.

 Ensure that connecting pipework and fittings

are suitably rated to handle the predicted
pipeline pressure.

 If rigid pipework comes in close proximity to

the pumphead, a drop-out section of pipework
will simplify tube replacement.

Watson-Marlow 114DV pumphead: operating instructions 4

3.5 Tube holder
positioning

The pumphead can be adjusted to accommodate

1.6mm wall tubing in sizes from 0.5mm bore to

4.8mm bore.

Inner position, for small tubing

Outer position, for large tubing

With the smaller bore tubes of 0.5mm, 0.8mm and

1.6mm the inner position must be used to prevent
the risk of tube slipping through the clamps and
wandering across the rollers causing premature
tube rupture.

With the larger bore tubes of 4.0mm and 4.8mm
the outer position must be used to prevent the flow
rate being excessively reduced.

For tubing bores of 2.4mm and 3.2mm either
setting may be used, as appropriate for the
application. The inner setting will clamp the tube
harder, reducing tube slip but has the potential to
marginally reduce flow rate. The outer setting will
optimise flow rate but the risk of tube slip is
increased.

The tube holder is factory pre-set to the outer
position.

Tube holder position

Tube bore size 0.5mm 0.8mm 1.6mm 2.4mm 3.2mm 4.0mm 4.8mm

Inner

      

Outer

      

Watson-Marlow 114DV pumphead: operating instructions 5

To change from the large
tube to the small tube setting

 Press down and slightly away from the front of

the pumphead, as shown in the first picture
above.

 Maintain the angled downward pressure and

push away from the front of the pumphead.
The jaw clicks into a new position.

 Release the pressure. The jaw rises into its

correct alignment. If it does not rise, repeat the
procedure, being sure to maintain downward
pressure until release.

 Adjust the tube holder on the other side of the

pumphead in the same way.

To change from the small
tube to the large tube setting

Carry out the procedure described above, but
pushing towards the front of the pumphead.

 Lift the flip top until fully open.
 Place the pointed device pointing down into the

small depression pictured here.

Note: The pictures on the previous page show the
tube holders’ correct positions for small and large
tubing. If a tube holder is not vertical relative to the
body of the pumphead, it is wrongly positioned.
Follow the instructions above to reposition it.

3.5.1 Tube holder
repositioning

Switch off the pump before changing the tube
holder position. Use a pointed device such as a
ball-point pen to reposition the lower tube holders
on both sides of the pumphead.

Watson-Marlow 114DV pumphead: operating instructions 6

3.6 Tube loading and
removal

 Lift the flip top until fully open.
 Select enough tube length for the curve of the

pump track. Place the tube between the rotor
rollers and the track, pressed against the
pumphead inner wall. The tube must not be
twisted or stretched against the rollers.

 Lower the flip top until it clicks into its fully

closed position. The track closes automatically
and the tube is stretched correctly as it does
so.

 To remove the tube, reverse the sequence.

Click!

Check that the tube holders on both sides of the
pumphead are correctly set for the size of tube you
are using.

Always isolate the pump from
the mains power supply before
opening the guard or
performing any positioning,
removal or maintenance
activity.

3.7 114DV pumphead
spares

013.6000.00A

114DV pumphead with tube
holder pre-set into larger bore
setting

Watson-Marlow 114DV pumphead: operating instructions 7

3.8 114DV
Performance data

Flow rates are normalised test values obtained
using new tubing with the pumphead rotating
clockwise pumping water at 20C with negligible inlet
and discharge pressure. Actual flow rate achieved
may vary because of changes in temperature,
viscosity, inlet and discharge pressures, system
configuration and tubing performance against time.
Flow rates may also vary due to normal
manufacturing tolerances of the tubing. These
tolerances will make flow rate variance more
pronounced at smaller bore sizes.

For precise and repeatable performance it is
important to determine flow rates under
operating conditions for each new piece of
tubing.

Note: Flow rates quoted have been rounded for

simplicity, but are accurate to within 5%, well
within the normal tubing tolerance variation of flow
rate. They should therefore be taken as a guide.
Real flow rates in any application must be
determined empirically.

120F: All tubing materials (ml/min)

Fixed

speed

0.5

mm

0.8mm1.6
mm

2.4mm3.2mm4.0mm4.8
mm

10 rpm 0.2 0.4 1.4 2.9 4.7 6.7 8.5

17 rpm 0.3 0.7 2.4 4.9 8 11 14

31 rpm 0.6 1.2 4.3 9.0 15 21 26

52 rpm 1.0 2.1 7.3 15 25 35 44

220 rpm 4.4 8.8 31 64 100 150 190

120S: All tubing materials (ml/min)

Speed 0.5mm 0.8mm 1.6mm 2.4mm 3.2mm 4.0mm 4.8mm
1-200

rpm

0.02-4 0.04-8 0.14-28 0.29-58 0.47-94 0.67-130 0.85-170

120U: All tubing materials (ml/min)

Speed 0.5mm 0.8mm 1.6mm 2.4mm 3.2mm 4.0mm 4.8mm

0.1-200
rpm

0.002-4 0.004-8 0.01-28 0.03-58 0.05-94 0.07-130 0.09-170

Pressure and flow performance curve

Marprene tubing, 1.6mm wall, 100 rpm, CCW
rotation. Note: The 120S and the 120U must be run
counter-clockwise to achieve pressures up to 2 bar.
The 120F is a transfer-only, 0 bar pump.

suction (bar) pressure (bar)

01 2

Flow rate: ml/min

0

20

40

70

80

100

10

30

50

60

90

-0.5 -0.3 0-0.1-0.2-0.4

pressure (+) barsuction (-) bar

-0.5 -0.4 -0.3 -0.2 -0.1

0

100

90

80

70

60

50

40

30

20

10

0

ml/min

0 1 2

4.8 x 1.6

4.0 x 1.6

3.2 x 1.6

2.4 x 1.6

1.6 x 1.6

0.8 x 1.6

Watson-Marlow 114DV pumphead: operating instructions 8

3.9 114DV continuous
tubing product codes

1.6mm wall thickness tubing for the
114DV pumphead

mm # Marprene Bioprene Pumpsil

0.5 112 902.0005.016 933.0005.016 913.A005.016

0.8 13 902.0008.016 933.0008.016 913.A008.016

1.6 14 902.0016.016 933.0016.016 913.A016.016

2.4 902.0024.016 933.0024.016 913.A024.016

3.2 16 902.0032.016 933.0032.016 913.A032.016

4.0 902.0040.016 933.0040.016 913.A040.016

4.8 25 902.0048.016 933.0048.016 913.A048.016

mm # STA-PURE PCS STA-PURE PFL

1.6 14 960.0016.016 965.0016.016

3.2 16 960.0032.016 965.0032.016

4.8 25 960.0048.016 965.0048.016

3.10 Trademarks

Bioprene, Marprene, Pumpsil and Watson­Marlow are trademarks of Watson-Marlow

Limited.
GORE STA-PURE PCS and GORE STA-PURE PFL
are trademarks of W.L.Gore and Associates.

3.11 Do not use
pumps in patient­connected applications

Warning These products are not designed for use

in, and should not be used for patient-connected
applications.

3.12 Publication
history

m-114pumphead for 120-gb-01.qxp:
Watson-Marlow 114 pumphead.
First published 07 10. Revised 09 14.