Sartorius WM Series User manual

PRESENTED BY
JPBOWLIN.COM
817.332.8116
J.P. Bowlin is a quality-driven Calibration Company
that has provided calibration, repair and sales
of all types of weighing and measurement products since 1931.

Operating Instructions
Sartorius WM.. Models
Weighing in Motion
98648-009-48

2
Contents
3 Preliminary Remarks
3 Intended Use
3 Warranty
3 Safety Instructions
3 Safety Instructions regarding t e
System
4 Safety Instructions for t e User
4 Safety Instructions for Maintenance
Personnel
4 Safety Instructions regarding t e
Pneumatics
4 Safety Instructions regarding t e Place
of Installation
5 Observing Environmental Protection
Regulations
5 Equipment Supplied
5 CE Equipment Designation Label
5 Declaration of Conformity
6 Installation Instructions
6 Ambient Conditions
6 Floor Load Limits
6 Setting Up and Installing t e
Equipment
6 Working wit t e Weig ing Platform
6 Visual Inspection
6 Transport to t e Place of Installation
7 Adjusting t e C eckweig er
8 C anging t e Conveyor Direction
9 Getting Started
9 Connecting t e Equipment
to AC Power
9 Installation
11 Serial Data Interface
11 Sorting Facilities
12 Motor Cable
12 Switc ing on Power/Initial
Commissioning
13 Inspection and Adjustment following
Initial Power-up
13 Target Speed
13 Product Detection
14 Determining Weig t Values
(Inspection, Adjustment)
14 Standstill/Idle
15 Determining Weig t Values
15 Product Spacing
15 Display and Control Unit
15 Keys
16 Troubles ooting
16 Error Codes
16 Weig t Discrepancies
16 Troubles ooting Electrical Problems
16 Errors in Normal Operation
17 Care and Maintenance
17 Cleaning
17 Mec anical Maintenance
17 Daily Inspection
17 Quarterly Inspection
18 Annual Maintenance
18 Electrical Maintenance
19 RS-232 ASCII Interface
19 Data Format
19 Control Input/Output Ports
20 Instructions for Recycling
t e Packaging
21 Specifications
23 General View of t e Equipment
24 Dimensions (Scale Drawings)
28 Circuit Diagrams
28 Spare Parts
28 Accessories (Options)
The following symbols are used
in these instructions:
§indicates required steps
$indicates steps required only under
certain conditions
> describes w at appens after you ave
performed a certain step
– indicates an item in a list
!indicates a azard

Preliminary emarks Intended Use Safety Instructions
T ese operating instructions are included
in delivery of t e equipment and must
be accessible at all times in t e area in
w ic t e system is installed.
T e operating instructions must be
supplemented by applicable national
regulations for accident prevention and
environmental protection. National
regulations governing safety and correct
operation of t e equipment must be
applied. T e operator of t e system is
responsible for observance of all safety
precautions and for t e operation of t e
equipment in accordance wit its
intended use. Use of t is system in
azardous areas (Zones 0, 1, 2, 20, 21
or 22), in areas containing potentially
explosive agents, out of doors, or in
areas in w ic explosive gases, vapors or
dusts can form is not permitted.
T e operator accepts 100% liability in
t is respect. T e minimum required age
for operating personnel is stipulated by
law and must be observed. Eac person
operating t is equipment must be
trained so t at e or s e is familiar wit
t e andling of t e system and can
operate t e equipment wit out azards
to persons or property. T e operating
instructions must be read and observed
by all users w o work wit or near t e
system; for example, in:
– operation, troubles ooting during nor-
mal operation, elimination of production
waste, care or disposal of operating and
auxiliary materials
– mac ine maintenance (including
maintenance, inspection, corrective
maintenance)
– transport
Sartorius accepts no liability for damage
or injury resulting from failure to observe
t ese instructions. Sartorius reserves t e
rig t to modify t e equipment in accor-
dance wit tec nological developments,
w ic may result in specifications or
features t at differ from t ose indicated
in t ese instructions and t e illustrations
contained erein. No part of t is publi-
cation may be reprinted or translated in
any form or by any means wit out t e
prior written permission of Sartorius AG.
All information required for operation of
t e equipment in accordance wit its
intended use is contained in t ese
instructions. T ese operating instruc-
tions are not subject to any modification
service. If you ave any questions con-
cerning t is equipment, please contact
your nearest Sartorius representative
office, or contact Sartorius directly:
Sartorius AG
Tec nical Service Center
Weender Landstrasse 94–108
D-37075 Goettingen, Germany
P one: ([phone]
E-mail: [email protected]
T e mac ine/system is intended to be
used exclusively for dynamic weig ing.
Dynamic weig ing modules of t e WM
(“Weig ing in Motion”) series enable
considerable flexibility in planning cus-
tomer-specific adaptations for product
feed and disc arge. WM series equip-
ment can be used to c eck samples
weig ing from 25 g (minimum sample
quantity) to 35 kg (maximum capacity).
One weig t value is detected and
output for eac sample or product (i.e.,
eac object weig ed). W en using t e
Quality series equipment, target values
for up to 25 products can be stored for
c eckweig ing. T e differences between
t e individual WM models are in t e
widt and lengt of t e conveyor belts.
Mec anical classification and sorting
lines can be connected downstream
from t e c eckweig er. A PC or PLC
system can be connected for processing
measurement data or control signals
from t e WM c eckweig er.
T e mac ine/system is designed for
use in dry production/logistics areas, for
final packaging or secondary packaging.
Any ot er use, or use t at extends
beyond t e tasks described ere,
constitutes use of t e equipment for
ot er t an its intended purpose.
Conveyance of people or animals is
expressly pro ibited.
Warranty
T e warranty period is stated in t e
terms of delivery.
Any of t e following will void t e war-
ranty:
– Damage occurring as a result of t e use
of accessories or spare parts ot er t an
genuine Sartorius AG parts or products.
– Damage occurring as a result of use or
operation t at does not comply wit
t e intended use and t e instructions in
t is document.
– Repairs or ot er manipulations carried
out by persons w o are not aut orized
and ave not received t e required
training.
Symbols used in these instructions
!
Danger!
Denotes a dangerous situation. Fatal or
at least serious injury, or considerable
material damage may result.
!
Caution:
Denotes a situation t at mig t be
dangerous. If not prevented, minor
injury may result.
Important Note:
Denotes tips for users, or ot er
particularly useful information.
Note
Denotes advice to users
(background information).
Safety Instructions regarding
the System
– T e system as been built in accordance
wit t e latest tec nology and meets
t e applicable accident prevention
regulations. T e system may present
a azard, owever, if it is not operated
in accordance wit t ese instructions
and its intended use. Hazards include:
– Accidents involving operating personnel
or t ird parties.
– Damage to t e system.
– Impaired performance of t e system.
– It is not permitted to modify, remove
or bypass safety features. C anges t at
impair t e safety of t e system must be
reported immediately.
– Make sure safety notices and azard
warnings on, in and around t e system
are legible at all times.
– Responsibilities for commissioning,
operating and performing maintenance
and repairs on t e equipment must be
clear at all times, to avoid uncertainties
in matters involving t e safety features.
– Arbitrary c anges or additions to t e
equipment, as well as modifications
t at compromise t e safety of t e
mac ine, are expressly forbidden. T is
also applies to any welding or drilling
carried out on load-bearing parts.
– All maintenance and repair work must
be performed w ile t e mac inery is at
a standstill and not under electrical
power.
3

– T e following regulations and guidelines
must be observed during transport, installa-
tion and operation of t e equipment:
Regulations of t e local electricity
provider; national regulations and guide-
lines, accident prevention regulations;
provisions of t e mac ines.
– T e continuous sound pressure level w en
t e system is in use is approximately 60 to
70 dB (A).
Reverberations at t e place of installation
may increase t e noise level at t e work-
station. If t e noise level exceeds 75 dB
(A), we recommend providing earing
protection for operating personnel.
– All spare parts must meet t e tec nical
requirements imposed by t e manufacturer.
– Observe all national regulations on t e
facilities provided for reporting and
fig ting fires.
– T e mac ine/system may be operated
only under safe and functional conditions.
Make sure all protective features and
safety-related facilities, suc as detac able
protective equipment or emergency exit
facilities, are available and functioning.
– Prevent t e risk of stumbling or tripping
during operation, repair or maintenance
of t e mac ine/system, as t e mac ine/
system presents a eig tened risk of injury.
Safety Instructions for the User
– Before turning on t e mac ine/system,
make sure no one can be injured or endan-
gered by t e system as it starts up.
– Only reliable personnel w o ave been
explicitly aut orized for t e purpose are
permitted to work wit or near t e
mac ine/system.
– Personnel in training, under instruction,
or taking part in educational measures are
not permitted to perform any actions on
t e system unless supervised by an experi-
enced operator.
– Operating personal are not permitted to
wear jewelry (including rings) or loose
clot ing; air must be bound/protected.
If anyt ing is caug t in t e rollers t at
move t e conveyor belt, injury could result.
Do not practice or permit any work met -
ods w ic could raise safety concerns.
– Protective clot ing must be worn insofar
as t is is required by working conditions or
regulations.
– All personnel trained in t e use of t is
equipment must understand and be aware
of t e significance and function of t e
emergency s utoff system and detac able
protective equipment. Make sure t e emer-
gency s utoff system is accessible at all
times. Operating personnel must also be
familiar wit t e location and operation
of t e fire extinguis er.
– Inspect t e mac ine/system at least once
per s ift for visible signs of defects or
damage. Report any c anges (including in
operation) to t e responsible person or
office immediately. If safe operation is no
longer assured, s ut down t e system imme-
diately, disconnected it from power and
ensure t at it cannot be switc ed on again.
– Inform operating personnel before any
work is performed on t e equipment,
including maintenance and service work.
Safety Instructions for Maintenance
Personnel
– Switc off t e mac ine/system before per-
forming any maintenance or service work.
Make sure it cannot be switc ed on again
w ile suc work is being performed. Affix
warning notices to ensure t at no one
attempts to switc on t e equipment. Test
for voltage in t e equipment before begin-
ning work. Use only tools t at are isolated
against electrical c arge.
– Block off a wide area around t e equip-
ment before beginning work by putting up
a red and w ite security tape wit
a warning sign.
– Work on t e electrical parts inside t e
mac ine/system must be performed by
a trained electrician, or a person wit
appropriate training working under t e
direct supervision of a trained electrician,
and must be carried out in accordance
wit t e applicable rules and regulations
pertaining to electrical equipment. If it is
necessary to work on parts t at carry elec-
trical c arge, make sure a second person is
present w o can activate t e emergency
s utoff if necessary.
– Make sure to tig ten any screws t at were
loosened during maintenance or service
work.
– If it is necessary to disassemble safety fea-
tures during maintenance or repair work,
t ese features must be reassembled and
tested immediately following t e comple-
tion of suc work.
– W en performing installation work ig er
t an face level, use stepladders and raised
platforms made for t is purpose or ot er
suitable equipment. Do not stand on t e
mac ine or mac ine parts. W en perform-
ing work at greater eig ts, wear a protec-
tive arness to prevent falls. Keep all an-
dles, ladders, stepladders, guard rails,
pedestals and platforms clean at all times.
– Remove any oil, dirt or cleaning agents
from all connections and screw fittings on
t e mac ine/system before beginning
maintenance/repair work. Do not use
aggressive cleaning agents. Use lint-free
clot s. Before cleaning t e equipment,
cover or seal all openings t roug w ic
t e penetration of water, steam or cleaning
agents would impair safety functions.
Electric motors, plug connections, switc es
and control cabinets are at particular risk
in t is respect. Make sure t e IP protection
remains intact.
– Parts and subassemblies must be securely
fastened to oisting devices w en removing
t em for replacement, to prevent safety
azards. Use only suitable and tec nologi-
cally faultless oisting equipment as well
as load receptacles wit sufficient load-
bearing capacity. Do not work underneat
suspended loads.
Safety Instructions regarding
the Pneumatics
– Work on pneumatic equipment must be
performed by tec nicians wit specialized
knowledge and experience of suc equip-
ment.
– Before disconnecting any pneumatic
connections, make sure t ere is no pres-
sure wit in t e system or system section.
In particular, make sure plug connections
are not under pressure before unplugging
or disconnecting t em.
– Compressed air pipelines must be installed
in accordance wit industry standards.
Fittings, lengt and quality of pipelines
and tubing must meet t e applicable
requirements.
– After cleaning t e equipment, c eck all
cable and pipeline connections for leak-
age, loose connections, c afe marks, and
damage. Make sure screw fittings t at
were opened during maintenance work
are closed tig tly and any container lids,
sieves or filters t at were removed are
reinstalled. Fix any defects immediately.
– Before putting t e equipment back into
operation, all tools, materials and ot er
items used during maintenance or repair
work must be removed from t e area
around t e system.
– Make sure all t e safety features of t e
system are functioning correctly.
Safety Instructions regarding the Place
of Installation
– Tasks suc as rigging up loads and pro-
viding guidance for crane operators or
drivers of elevating platform trucks or
industrial trucks, s ould be performed by
experienced persons only. T e person
guiding t e equipment operator must be
in t e operator’s line of sig t or range
of earing.
– Use only suitable transport ve icles wit
sufficient load-bearing capacity. Secure
t e load reliably. Use only t e suspension
points specified in t e operating instruc-
tions for attac ing t e equipment to
oisting devices and observe standard
industry practices w en lifting t e equip-
ment.
– Any parts t at are removed for transport
must be carefully reinstalled and firmly
attac ed before putting t e equipment
back into operation.
– Disconnect all leads before c anging t e
place of installation. Reconnect t e leads
w en putting t e equipment back into
operation. Always proceed in accordance
wit t e operating instructions w en put-
ting t e equipment back into operation.
4

Observing Environmental Protection
egulations
– Legal obligations for prevention of
waste and proper recycling or disposal
of materials must be observed during all
work on and wit t e mac ine/system.
In particular, substances azardous to
water, suc as lubricants, oils, coolants
or cleaning agents, must be prevented
from soaking into t e ground or enter-
ing t e sewage water system. Suitable
containers must be used to store,
transport, collect and dispose of t ese
substances.
Equipment Supplied: WM Models
– WM...
– Control cabinet key
– Operating instructions
– Operating instructions for t e c eck-
weig er
– Operating instructions for t e frequency
converter
– Circuit diagrams (booklet)
– Base frame, model YWT.. and special
accessories (if ordered)
– Dust cover for display and control unit
CE Equipment Designation Label
(Example)
Order no.
Internal ID no.
Model
Serial no.
Power supply/frequency
SARTORIUS AG GÖTTINGEN Germany
WM35GEP –I000Q
91000001
230V ac 50/60 Hz 0.3K W Yr of mfr. 2000
C
Sartorius Fast-Factory
Special Version: 40004525
VF1812
5
Declaration of Conformity

Installation Instructions
Ambient Conditions
C oose a suitable location for setting up t e mac ine/system.
T e place of installation s ould be dry, level and even. T e allowable operating tempera-
ture range is -10°C to +40°C (14°F to 104°F).
Observe t e following w en c oosing a location for t e equipment:
– Avoid extreme eat radiation from eaters or direct sunlig t
– Protect t e equipment from excessive vibrations (e.g., from a conveyor line in close
proximity to t e system)
– Make sure t e equipment is easily accessible for maintenance and repair work
– Avoid exposure to drafts; e.g., from opened doors or windows,
or from air conditioning systems
– Do not set up t e equipment on a soft, loosely packed or springy surface
Floor Load Limits
T e load-bearing capacity at t e place of installation must be sufficient for t e
mac ine/system.
Transport to the Place of Installation
Caution:
Do not old t e mac ine/system by t e conveyor belt to lift or move t e equipment.
W en transporting t e equipment, make sure t e c eckweig er is lifted only by t e beams
on t e base frame.
Models WM60..., WM120... and WM35LFP... must be secured for transport using overload
stops (screws).
Setting Up and Installing the Equipment
You can use a transport ve icle suc as a forklift or elevating platform truck to position
t e mac ine/system at t e place of installation. Observe t e conditions listed under
“Safety Instructions regarding t e Place of Installation” above. Special training is not
required for installing and commissioning t e equipment. All installation work s ould be
performed by tec nicians. T e steps for installation and commissioning are described in
t e order in w ic t ey are to be performed.
Caution:
Work on t e electrical parts inside t e mac ine/system must be performed by a trained
electrician, or a person wit appropriate training working under t e direct supervision
of a trained electrician, and must be carried out in accordance wit t e applicable rules
and regulations pertaining to electrical equipment.
Handling of the Weighing Platform and Conveyor Belt
T e weig ing platform is a ig -precision measuring instrument. For t is reason,
t e following must be observed w en andling or using t e weig ing platform:
Do not expose t e weig ing platform unnecessarily to extreme temperatures, moisture,
s ocks, or vibration, w ic could result in damage. T e weig ing instrument must not be
moved by force applied t roug t e conveyor belt on t e weig ing platform.
Visual Inspection
As soon as t e equipment is delivered, inspect it for visible signs of any damage t at may
ave occurred during transport.
Important Note:
T e attac ment of t e weig ing platform to t e base frame is adjusted at t e factory. T e
fastening screws are secured wit locknuts. Level t e instrument by adjusting t e leveling
feet on t e base frame and referring to t e built-in level indicator.
If t e equipment was delivered wit out a base frame, grasp t e frame to lift t e equip-
ment.
Transport to the Place of Installation
Caution:
Do not lift t e equipment by t e conveyor belt. Use only t e suspension points indicated
(see illustration) for transport.
Note:
If t e weig ing platform is to be replaced, make sure t e weig ing platform frame is not
bent out of alignment. Position t e spacing plates before bolting t e equipment toget er.
6
°C
!
!

7
7
Adjusting the Checkweigher
Important Note:
In addition to t e usual tools, a 1-meter spirit level is required for adjusting t e c eck-
weig er.
§Loosen t e locknuts on t e leveling feet (1).
§Extend or retract t e leveling feet until t e level indicator on t e weig ing platform
of t e c eckweig er indicates a level position.
§T e air bubble must be centered wit in t e circle on t e level indicator.
§Adjust t e conveyor belt to t e eig t of t e conveyor line to t e left and rig t, and level
it as s own (3). Adjust t e eig t of bot t e feed and disc arge ends of t e conveyor.
In t e process, adjust eac of t e four leveling feet by t e same number of turns.
§C eck t e adjustment using t e spirit level (2).
§Perform fine adjustments by turning t e leveling feet until t e equipment is completely
level.
§Make sure eac foot carries t e same load.
§Tig ten t e locknuts on t e leveling feet.
§C eck t e level indicator on t e weig ing platform again (4).
§C eck t e distance between feed and disc arge bands. T e minimum distance s ould not
be less t an 7 mm (5).
§Make sure moving parts are not obstructed. Moving parts must not ave contact wit
ot er components.

Changing the Conveyor Direction
You can c ange t e direction of conveyance by turning t e entire c eckweig er around
(i.e., t e c eckweig er wit frame; models WM35, 60 and 120).
Only one direction of conveyance is possible for c eckweig er model WM6.
§Install t e c eckweig er wit out its support trestle to ave it facing in t e desired direc-
tion. If t e c eckweig er as a support trestle, remove t e 4 screws t at attac t e trestle
to t e frame.
§Separate t e connection between p oto sensors and control cabinet. Connect t e p oto
sensor cable in t e control cabinet in accordance wit t e numbering.
§Install t e display and control unit (wit column) on t e ot er side of t e c eckweig er,
in accordance wit t e operating instructions.
Important Note:
Do not rotate t e weig ing platform by 180°.
§Turn t e c eckweig er wit its frame and re-fasten t e p oto sensor cable in according
wit t e numbering.
Overload Stops
Note:
T e load receptors on models WM60..., WM120... and WM35LFP... are secured
by 4 overload stops (screws).
§Following installation of t e equipment and before commissioning, remove t ese over-
load stops as follows:
§Remove t e cover plate (SW 13 or 19).
§Use t e enclosed metal strip (t ickness: 0.3 mm) to distance t e load receptors by 0.3
mm.
Note:
T e metal strip is s ipped in a polyet ylene bag inside t e control cabinet.
§Use t e locknut to secure t e setting.
§Replace t e cover plate and fasten wit t e screws.
Caution:
Always secure t e load receptor on t ese models wit t e overload stops before
transporting t e equipment.
!
8
0.3 mm
}

Getting Started
Connecting the Equipment to AC Power
Danger!
Before connecting t e equipment to power, make sure t e power cords are not live.
T e main switc must be in t e “OFF” or “0” position.
Installation
For t e electrical connection to t e power supply, a feeder wit a cross section
of 3 +1.5 mm2is required.
T e supply voltage is 230 V (±10%) at 50 Hz (±5%). Before connecting t e feeder, read
and follow all safety instructions in t ese operating instructions and observe t e data on
t e manufacturer’s ID label. To prevent interference from ot er devices (e.g., from feed-
back), we recommend installing a separate line and securing it wit a 6A semi-time lag
circuit breaker. We also recommend installing additional safety devices wit in t e electri-
cal circuit, suc as an emergency s utoff switc .
Caution:
W en you install data cables, make sure t at power cables and data cable are not parallel,
as t is can lead to inductive interference.
§Use t e key supplied to open t e control cabinet.
§Feed t e cable into t e cabinet from below.
9
!
!

§Connect power supply cables in accordance wit industry standards.
Connect t e black wire (L1; live) to terminal (1)
Connect t e blue wire (N; neutral) to terminal (2)
Connect t e green/yellow wire (PE; protective eart ;
grounding conductor) to t e grounding terminal (screw)
Refer to t e wiring diagram for terminal assignments.
Make sure t e p ase connection is correct.
§Tig ten t e screws.
§Make sure t e protective grounding conductor and ground terminal ave secure contact
and t at t e screws are tig tened.
§Close and lock t e control cabinet
10

Serial Data Interface
You can connect a Sartorius printer (see “Accessories”) or a computer to t e serial ASCII
RS-232 data interface on t e control cabinet.
§Plug t e connector into t e data interface.
Note:
Keep t e t readed cap in a safe place.
W en t e data interface is not in use, replace t e t readed cap to protect t e interface
port from dust, s avings or liquids.
Sorting Facilities
You can connect downstream sorting facilities over isolated contacts in t e control cabi-
net (isolated from all potential) to output ports on a programmable logic controller (PLC).
Note:
T e sorting facilities must ave a separate power supply (max. 30V (AC/DC), 1A).
Closed contact: active, signal duration: 300 ms. T e built-in power supply in t e c eck-
weig er is not suitable for t is purpose, as it is not designed to power suc facilities.
Control and integration of sorting facilities (e.g., pus ers, blast nozzles, sorting station,
etc.) must take place on t e operator’s premises.
§Open t e control cabinet.
§Guide t e cable t roug t e opening (see bottom of control cabinet).
§Connect cable ends to PLC outputs (OUT2 to OUT4).
Connections
OUT2 relay contact >
OUT2 relay contact >
OUT3 relay contact =
OUT3 relay contact =
OUT4 relay contact <
OUT4 relay contact <
§Close t e control cabinet.
11

Motor Cable
T e motor cable is attac ed to t e c eckweig er frame at t e factory.
T is must not be modified.
§C eck w et er t e motor cable is unobstructed and not in contact wit any objects (e.g.,
t e load plate on t e c eckweig er).
§C eck w et er t e plug on t e motor cable is firmly connected and t e closing clamp for
t e connection is in t e “up” position.
Switching on Power/Initial Commissioning
Before initial commissioning:
§C eck w et er t e local supply voltage matc es t e rating listed on t e manufacturer’s
ID label.
§Connect t e equipment to power.
§C eck t e supply voltage, p ase, neutral connector and ground connection. C eck t e
protective eart (grounding) in accordance wit national regulations.
§Remove all objects from t e conveyor belt before turning on t e equipment.
§Turn t e main switc to t e “1” or “ON” position. T e c eckweig er performs a self-test.
Wait until “0” is displayed on t e weig t readout.
§Turn t e “ON/OFF” switc to t e “ON” position. T e conveyor belt turns.
12

Inspection and Adjustment following Initial Power-up
T e conveyor belt may ave to be adjusted. It is important t at t is belt remain centered
w ile t e equipment is running. A conveyor belt tends to center itself at t e point of
ig est tension. Due to t e convexity of t e drive roller, t is point is t e middle of t e
conveyor unit. Prerequisite is, owever, t at t e track roller and drive roller are parallel to
one anot er. To center t e belt, adjust t e clamping screws on t e track roller.
§C eck w et er t e conveyor belt centers itself toward one side, so t at it is no longer in
t e middle.
§If t e conveyor belt centers itself toward one side, adjust t e clamping screws on t e
track roller until t e conveyor belt centers itself in t e middle.
§T e belt is fart er to t e rig t:
loosen t e clamping screw on t e rig t and tig ten t e clamping screw on t e left.
§T e belt is fart er to t e left:
Loosen t e clamping screw on t e left and tig ten t e clamping screw on t e rig t.
§Following t is adjustment, tig ten t e locknuts to prevent t e clamping screws from
working loose.
§After approximately 1 our of operation, c eck t e setting. Use of t e conveyor belt may
cause a c ange in its position.
Target Speed
T e target speed of t e conveyor belt is set at t e factory to t e value indicated on t e
order w en t e equipment was purc ased. If no value was indicated, t e conveyor belt is
set to a median speed (approximately 25m/min). To modify t e speed, parameter P4 must
be c anged in t e frequency converter:
ig er value = ig er rate of speed
lower value = lower rate of speed
Please refer to t e operating instructions for t e frequency converter for details (delivered
inside t e control cabinet).
Product Detection
Product detection is implemented using p oto sensors at t e end of t e weig ing
section. As a rule, t ese are one-way p oto sensors consisting of a transmitter and
a receiver, or reflected-lig t sensors. T e weig ing platform is designed to be as rugged
and reliable as you require in your industrial applications.
13

Determining Weight Values (Inspection and Adjustment)
You can c eck t e accuracy of weig ing eit er statically (wit t e equipment at a stand-
still) or dynamically (wit t e conveyor belt running). In eit er case, t e c eckweig er
must be zeroed and calibrated/adjusted by pressing t e “Zero/tare” key (=) before you
begin.
§Press and old t e =key (> 2 sec). T e calibration/adjustment routine starts and t e
calibration weig t is displayed in grams.
Note:
If t e error code “Err 02” is displayed, t is indicates an error or disturbance in starting
t e calibration procedure. In t is event, press t e =key briefly. W en zero is displayed,
press and old t e = key again.
§T e calibration weig t is displayed.
§Place t e corresponding calibration weig t (Class M1) on t e weig ing platform.
T e weig ing instrument is calibrated automatically. Once t e calibration routine is
completed, t e calibration weig t is displayed wit t e weig t unit, “kg”.
Note:
T e calibration/adjustment procedure is described in detail in t e operating instructions
for t e weig ing instrument.
Static weig ing test:
§Bring t e conveyor motor to a standstill. Turn t e ON/OFF switc to t e OFF position.
§Press t e tare key =on t e c eckweig er briefly.
§Center various weig ts on t e conveyor belt (i.e., centered on t e weig ing platform) in
various positions.
§Read t e weig t value on t e display of t e c eckweig er.
If t e value displayed matc es t e weig t on t e instrument every time, you can continue
wit t e dynamic weig ing test. If t e value displayed does not always matc t e actual
weig t, c eck t e settings described above.
Dynamic weig ing test:
§Turn on t e conveyor motor. Turn t e ON/OFF switc to t e ON position. T e conveyor
belt begins turning.
§Have products wit various weig t values conveyed on t e belt.
T e weig t value is automatically output to t e interface as soon as t e lig t barrier of
t e p oto sensor is broken by t e product (at t e end of t e weig ing section).
Standstill/Idle
W en t e equipment is at a standstill or t e motor is idling, t e weig t on t e c eck-
weig er is determined in t e same manner as on any weig ing instrument. In dynamic
weig ing w en t e conveyor belt is in operation, t e weig t value is determined w en
t e product (sample) goes t roug t e lig t barrier of t e p oto sensor.
14

Determining Weight Values
(T e following description refers to t e illustrations on t e left.) T e product approac es
t e measurement (weig ing) section of t e conveyor system. T e product is detected on
t e conveyor belt. T e weig t value increases from “0” to “G” on t e c eckweig er display.
T e product now rests entirely on t e conveyor belt. At t is moment, t e weig t value
determined on t e weig ing platform is ig er t an t e actual weig t of t e product.
T is is known as “overs ooting” t e weig t.
T e product is now conveyed across t e weig ing section. Weig t values are determined
continuously, wit a tendency toward identical values. T e weig t value t at is consis-
tently determined over time is t e actual weig t value of t e product.
T e product breaks t e lig t barrier; i.e., it reac es t e p oto sensor positioned at t e
end of t e weig ing section, w ic triggers transmission of t e weig t value over t e
interface to t e user’s perip eral equipment.
Product Spacing
T e next product approac es t e conveyor belt.
Important Note:
It is essential t at two products are not on t e conveyor belt, i.e. in t e weig ing section,
at t e same time. For added safety, 10% of t e lengt of t e conveyor belt (weig ing
section) s ould be added to t e distance between products.
T is yields t e total distance between products as follows:
T e distance between t e front of one product and t e front of t e subsequent product
s ould be equal to 110% of t e lengt of t e conveyor belt (weig ing section).
T e product comes to t e end of t e weig ing section and continues to t e next conveyor
belt segment. T e weig t readout slowly returns to “0” and t e p oto sensor is ready to
operate.
Display and Control Unit
In normal operation, no actions are required on t e part of operating personnel.
If t e readout s ows a value < or > zero w en t ere is no load on t e weig ing platform,
owever, t e weig ing instrument must be tared. All ot er information relevant to t e
weig ing instrument is contained in t e weig ing instrument’s operating instructions.
Keys
T e most important keys on t e display and control unit are:
ON/OFF key e
– Turns t e display on or off. T e weig ing instrument remains in standby mode.
Note:
T e weig ing instrument can be switc ed off only using t e main switc .
Zero/tare key =
Zeroes/tares t e weig ing instrument
Data output key p
– Sends data to t e built-in data interface. Identical to t e function of t e p oto sensor.
15
e
=
p
Product spacing

Troubleshooting Guide
Error codes are s own on t e display for approx. 2 seconds.
T e program t en returns automatically to t e previous mode.
Problem Cause Solution/Explanation
No segments lit in – No AC power is available – C eck t e power supply.
t e display – Automatic s utoff to follow – Switc on t e display
– T e display is defective – Contact t e customer service center
T e display s ows “H” – Weig ing capacity as been exceeded – Unload t e weig ing platform
T e display s ows “L” – Conveyor belt not in place – Position t e conveyor belt on t e weig ing
or “Err 54” instrument
T e display s ows “Err 01” – Data output in wrong format – Correct t e setting in t e operating menu
T e display s ows “Err 02” – Zero key =pressed – Wait for “zero” display before pressing
before zero displayed zero key–=
– Load on conveyor belt – Remove load from conveyor belt
T e display s ows “Err 08” – Zero-setting in t e zero – Zero-setting is only possible wit in
range not possible a tolerance range of ± 2% of t e
max. capacity
T e display s ows “Err 09” – Taring not possible w en gross < 0 – Press =to zero
T e readout c anges constantly – T e place of installation is – Adapt filter in operating menu
unstable (e.g., due to draft)
Readout does not stabilize – Foreign object on t e load plate – Remove t e foreign object
Results are incorrect – Weig ing instrument not adjusted – Calibrate/adjust weig ing instrument
– Weig ing instrument not tared – Tare weig ing instrument
– Weig ing instrument not level – Level t e weig ing instrument
Weight Discrepancies
Discrepancies in weig ts can be caused by any of a number of factors:
– Poor motor cable installation
– Dirt/deposits on driver roller
– Dirt/deposits on load plate or weig ing platform
– Dirt/deposits on or near t e feed and/or disc arge end of t e conveyor
– Dirt/deposits on t e product
Troubleshooting Electrical Parts
Function sequences of t e c eckweig er from power-up to normal operation are
described in t ese instructions. If an electrical error or defect occurs, inform t e tec ni-
cians responsible for maintenance; t ey ave t e knowledge and responsibility to deal
wit t is type of problem. If t e error cannot be localized, or if t e cause of t e problem
cannot be eliminated, please contact t e Sartorius Tec nical Customer Service Center.
Errors in Normal Operation
T ere are a number of factors t at can disrupt normal operation or cause errors.
T ese are listed below wit t eir probable causes.
The LED on the photo sensor remains lit and does not switch off when a product
reaches the light barrier:
– t e p oto sensor is not positioned correctly, t us t e product is not detected
– t e p oto sensor as been wired incorrectly (e.g., during recent replacement)
– t e p oto sensor is defective
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The LED on the photo sensor remains off:
– t e p oto sensor is not adjusted correctly, t us transmitter and receiver are not
communicating
– transmitter or receiver is defective
– t e p oto sensor as been wired incorrectly (e.g., during recent replacement)
– a p oto sensor cable is defective
The motor does not run:
– cable connection to frequency converter is defective
– t e frequency converter is defective
No data transfer:
– t e data cable is not plugged in correctly
– incorrect menu settings for t e interface (see operating instructions)
– t e data output is defective
Care and Maintenance
Observe all safety instructions and regulations w en performing care and maintenance
work.
Cleaning
Do not use aggressive cleaning agents, suc as solvents or similar substances.
Use only a clot dampened wit soapy water.
§Remove dirt or dust carefully. Use a soft-bristled brus to remove deposits.
§Rub surfaces dry using a soft, lint-free clot .
Caution:
Wet cleaning is not permitted due to t e risk of electrical s ock.
Do not use compressed air to clean t e equipment, as t is mig t damage t e weig ing
platform.
Mechanical Maintenance
Regular maintenance and inspections will ensure a long service life for t e c eckweig er
and keep problems to a minimum.
Instructions and recommend intervals for performing maintenance and inspections are
given in t e following.
Daily Inspection
Equipment/Part Check Action
Conveyor belts Move freely, no friction? Adjust as needed
Belt Deposits beneat belt? Remove
Centered? Adjust as needed
Damaged? Replace
Product deposits? Clean
Motor cable Product deposits? Clean
Exposed? Eliminate installation error
Motor Product deposits? Clean
Quarterly Inspection
Equipment/Part Check Action
Sync ronizing belt Centered? Adjust t e was er
disk alignment
(motor mounting plate)
Damaged? Replace
Worn sprockets? Adjust tension
Vibration? Adjust tension
We recommend drawing up a sc edule of tasks for your maintenance personnel.
17
!

Important Note:
T e 4 screws for fastening t e weig ing platform to t e frame must not be tig tened nor
loosened. Make sure t at t ese screws cannot be adjusted or manipulated.
Annual Maintenance
We recommend aving t e equipment inspected annually by our customer service center.
Electrical Maintenance
Always perform t e following inspections first:
1. Power supply:
– Is t e correct supply voltage connected?
– Is t e power cable damaged?
– Is t ere a voltage of 24 V between terminals 22 and 24 in t e terminal strip?
2. Main power switc and on/off switc :
– Are t e switc es in t e correct position?
3. Cable connections:
– Have t e terminal strip connections of a cable come loose?
– Has a power supply cable come loose?
– Is t e motor plug secured correctly wit t e rig t clamp?
– Is t e data cable connected correctly?
– Are any of t e wires or cables damaged?
4. Fuses:
– Is t e fuse on t e main power supply feeder ok?
– Is t e fuse for t e terminal strip ok?
For models WM 6 and WM 35: 4 A
For models WM 60 and WM 120: 10 A
5. Switc on t e system; main switc on “1”
– Is t e LED on t e p oto sensor lit?
– Is t e c eckweig er display on?
– Does t e display on t e frequency converter (FC) switc s ow 0.00 V?
– Did t e c eckweig er complete t e automatic self-test?
(t e motor cannot be started until t e c eckweig er as concluded its self-test)
18

6. Turn on t e motor; switc position “ON”
– Does t e display of t e FC’s protective switc s ow t e most recently set frequencies?
– Does t e motor start?
Note:
We recommend drawing up a c ecklist for your maintenance personnel so t at t ese
inspections can be c ecked off, and t us documented, as t ey are performed.
S-232 ASCII Interface
Data interface on control cabinet
B = TXD
C = RXD
D = DTR
E = Ground
H = CTS
Standard settings: 9600 baud, 7 data bits, odd parity, 1 stop bit,
ardware ands ake, data output wit out
stability of t e weig ing instrument:
menu setting 6 1 1
(ot er settings available on request)
Note:
T e operating instructions for t e weig ing instrument contain a detailed description of
t e interface.
Data Format
Example of data output: 12345. g
123456789101112 13 14 15 16
Pm Mv Mv Mv Mv Mv Mv Unit Unit Unit
+___12345. _ g _ _ CR LF
1 Pm Plus/minus sign +, – or space (for 0.0g)
2 Space
3 to 10 Mv Measured value (weig t) in ASCII c aracters wit decimal point
11 Space
12 to 14 Unit symbol or space
15 Carriage return (CR)
16 Line feed (LF)
Control Input/Output Ports
Quality Class
Belt - running - output (contact closed = belt running)
Sorting/classification signals <, =, > (300 ms)
Connection over terminal screws in t e control cabinet
PLC contact closer, 230V AC/DC, max. 5A
Relay contact closer, 30V AC/DC, max. 1A (contact closed = active),
signal duration: 300 ms
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K
J
H
G
AB
LC
D
M
FE