Siemens SITRANS WW300 User manual

Operating Instructions
SITRANS WW300
05/2015Edition
Weighfeeders

© Siemens AG 2015
Safety Guidelines
Warning notices must be observed to ensure personal safety as well as that of others, and to protect the product and the connected equipment.
These warning notices are accompanied by a clarification of the level of caution to be observed.
Qualified Personnel
This device/system may only be set up and operated in conjunction with this manual. Qualified personnel are only authorized to install and
operate this equipment in accordance with established safety practices and standards.
Unit Repair and Excluded Liability:
•The user is responsible for all changes and repairs made to the device by the user or the user’s agent.
•All new components are to be provided by Siemens.
•Restrict repair to faulty components only.
•Do not reuse faulty components.
Warning: Cardboard shipping package provides limited humidity and moisture protection. This product can only function properly and safely if
it is correctly transported, stored, installed, set up, operated, and maintained.
This product is intended for use in industrial areas. Operation of this equipment in a residential area may cause interference to several
frequency based communications.
Note: Always use product in accordance with specifications.
Copyright Siemens AG 2015. All Rights Reserved
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manual for agreement with the instrumentation
described, variations remain possible. Thus we
cannot guarantee full agreement. The contents of
this manual are regularly reviewed and
corrections are included in subsequent editions.
We welcome all suggestions for improvement.
Technical data subject to change.
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SITRANS
Weighfeeders
SITRANS WW300
Operating Instructions
05/2015
A5E33560691
-AB
Introduction
1
Safety information
2
Description
3
Installing
4
Calibrating
5
Connecting
6
Commissioning
7
Maintenance
8
Troubleshooting
9
Technical data
10
Dimension drawings
11

Siemens AG
Division Process Industries and Drives
Postfach 48 48
90026 NÜRNBERG
GERMANY
Order number: A5E33560691
Ⓟ
05/2015 Subject to change
Copyright © Siemens AG 2015.
All rights reserved
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property
damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific task
in accordance with the relevant documentation, in particular its warning notices and safety instructions. Qualified
personnel are those who, based on their training and experience, are capable of identifying risks and avoiding
potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. If products and components from other manufacturers are used, these must be recommended
or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and
maintenance are required to ensure that the products operate safely and without any problems. The permissible
ambient conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication may
be trademarks whose use by third parties for their own purposes could violate the rights of the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software described.
Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this
publication is reviewed regularly and any necessary corrections are included in subsequent editions.

SITRANS WW300
Operating Instructions, 05/2015, A5E33560691-AB 3
Table of contents
1 Introduction................................................................................................................................................ 5
1.1 The manual...............................................................................................................................5
2 Safety information...................................................................................................................................... 7
2.1 Safety and general precautions................................................................................................7
3 Description................................................................................................................................................. 9
3.1 Weighfeeder operation .............................................................................................................9
4 Installing .................................................................................................................................................. 11
4.1 Installation steps .....................................................................................................................12
5 Calibrating ............................................................................................................................................... 15
5.1 Test load .................................................................................................................................15
5.2 Zero.........................................................................................................................................15
5.3 Span........................................................................................................................................15
6 Connecting .............................................................................................................................................. 17
7 Commissioning ........................................................................................................................................ 19
7.1 Shear gate ..............................................................................................................................19
7.2 Skirtboards..............................................................................................................................19
7.3 Changing the conveyor belt ....................................................................................................20
7.4 Belt tension .............................................................................................................................21
7.5 Belt tracking ............................................................................................................................21
7.6 Telescoper adjustment ...........................................................................................................22
7.7 Weigh idler alignment .............................................................................................................23
7.8 Quick startup overview ...........................................................................................................23
7.9 Load cell replacement.............................................................................................................23
7.9.1 Removing old load cell............................................................................................................24
7.9.2 Installing new load cell............................................................................................................25
7.9.3 Recalibration ...........................................................................................................................25

Table of contents
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4Operating Instructions, 05/2015, A5E33560691-AB
8 Maintenance ............................................................................................................................................ 27
8.1 Preventative maintenance ..................................................................................................... 27
8.1.1 Recommended preventative maintenance schedule............................................................. 28
8.2 General maintenance............................................................................................................. 28
8.3 Lubrication.............................................................................................................................. 29
8.4 Weighfeeder storage recommendations................................................................................ 29
8.4.1 Load cell care......................................................................................................................... 29
8.4.2 Gear reducer.......................................................................................................................... 29
8.4.3 Electrical................................................................................................................................. 29
8.4.4 Lubrication.............................................................................................................................. 30
8.4.5 Belt care ................................................................................................................................. 30
9 Troubleshooting....................................................................................................................................... 31
9.1 Mechanical troubleshooting ................................................................................................... 31
9.2 Zero Drift, non-repeatability, or non-linearity ......................................................................... 31
10 Technical data ......................................................................................................................................... 33
10.1 Specifications......................................................................................................................... 33
11 Dimension drawings ................................................................................................................................ 35
11.1 Open unit................................................................................................................................ 35
11.2 Enclosed unit.......................................................................................................................... 36
Index........................................................................................................................................................ 37

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Operating Instructions, 05/2015, A5E33560691-AB 5
Introduction
1
Note
The Siemens weighfeeder is to be used only in the manner outlined in this instruction
manual.
1.1 The manual
This instruction manual covers the operation, installation, and maintenance of the Siemens
weighfeeder. Specific information for your weighfeeder model is also included with the product
such as testing documents.
Follow these operating instructions for quick, trouble-free installation, and maximum accuracy
and reliability of your device.
We always welcome suggestions and comments about manual content, design, and
accessibility. Please direct your comments to:
Technical publications (mailto:[e-mail])
For the complete library of Siemens manuals, go to:
Process Automation portal (http://www.siemens.com/processautomation)

Introduction
1.1 The manual
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Operating Instructions, 05/2015, A5E33560691-AB 7
Safety information
2
2.1 Safety and general precautions
WARNING
ALWAYS STOP the belt, lock-out, and/or place a "Do Not Energize" tag on the main
disconnect before working on or around the weighfeeder.
WARNING
Always follow established safe operating practices when working on or around the
weighfeeder, especially in wet environments and when adjacent to conductive steel
mounting framework.
Note
A weighfeeder can be dangerous. Pinch points exist along the conveyor belt line.
Secure the weighfeeder when:
•replacing the belt
•working on or around the load cell(s)
•working on or around the speed sensor
•working on or around the drive components
•working on or around the motor

Safety information
2.1 Safety and general precautions
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Description
3
SITRANS WW300 is a medium-to-high capacity weighfeeder for macro ingredient additives. It is
designed for industrial applications such as mining, cement, chemical processing, pulp and
paper, and other heavy-duty industries.
SITRANS WW300 comes with a weigh bridge, and speed sensor. An adjustable mechanical
shear gate profiles the material and fixes the correct material bed depth for a given material
application. The belt speed can be automatically adjusted to attain the correct feed rate. An
integrator and test weights are required to complete the system.
3.1 Weighfeeder operation
Weighfeeders weigh bulk material while it is conveyed. An accurate rate of flow and totalized
weight measurement is received without interrupting the flow of material in process. A
weighfeeder can also control the rate of flow of the conveyed product.
In-motion weighing requires accurate transmission of the product load to load cells. The resulting
voltage signal corresponding to weight is transmitted to the integrator and becomes one of the
two inputs required for integration.
Unlike static weighing, in-motion weighing integration requires a second input: a pulse signal
proportional to the speed of the conveyor belt. Each belt speed sensor pulse represents a fixed
distance of belt travel.
Since the force measured by the load cell is represented as weight per unit length, it can be
multiplied by the distance of belt travel (one speed sensor pulse) to provide product weight for
that segment of the belt (lbs/ft x ft = lbs, or kg/m x m = kg).
Adding the samples provides total throughput weight of product across the scale. With proper
scaling and calibration, the total weight can be displayed in kilograms, pounds, short tons, long
tons, metric tons, or other appropriate units.

Description
3.1 Weighfeeder operation
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10 Operating Instructions, 05/2015, A5E33560691-AB
Enclosed unit
Open unit

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Operating Instructions, 05/2015, A5E33560691-AB 11
Installing
4
Note
When lifting the weighfeeder, connect to the lifting points at the top of the unit, and follow
local governing code for lifting/hoisting.
Perform a thorough and systematic inspection of containers immediately upon receipt of your
Siemens weighfeeder. The containers are packed to separate each item and provide protection
during shipping.
Note
Do not remove equipment from
shipping crates or boxes until you check for possible
shipping damage. Contact the carrier immediately if damage is noted.
Your weighfeeder has been designed, assembled, and factory tested for your specific
application.
Note
•
The frame of the weighfeeder needs to be grounded to ensure accurate signal processing
to the integrator.
•
Do NOT remove the tagged load cell shipping bolt(s) until the installation is complete to
prevent load cell damage.
•
Do NOT weld on or
near the weighfeeder while the load cell is connected to the electronic
integrator. Damage to the integrator may result if the load cell is not disconnected from
the integrator.
•
Follow a scheduled, preventative maintenance program to ensure optimum performance
and long equipment life.

Installing
4.1 Installation steps
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4.1 Installation steps
Note
•
Only qualified personnel are authorized to install and operate this equipment. Installation
shall be in accordance with local regulations, standards and established safety practices.
Read and understand the instructions before installing, operating or maintaining the
equipment.
•
Flexible in-feed connections are REQUIRED for all applications. Flexible discharge
connections are also recommended.
1. Construct the necessary support framework to provide a sturdy, rigid base. Vibration isolators
are recommended if the location is subject to moderate or heavy vibration.
2. Align the in-feed section of the weighfeeder with the discharge of the feed device. Prevent
twisting or misalignment that could induce stress on the weighing section.
3. Install a gasket between the flanges for dust control.
4. Securely fasten the unit to the rigid, level structure constructed in step 1. Use a level for
verification and shim as necessary. Prevent any twisting of the frame that may affect
weighfeeder performance.
Note
The inlet and discharge of the weighfeeder will not support load.
5.
Note
If your system has a permanently lubricated gear motor, then disregard this step, and
proceed directly to step 6.
Check the gear reducer oil level. For further details, see the gear reducer information under
Maitenance.
6. A de-dust port may be provided at the discharge end of enclosed units. If no de-dust system
is required, this port should be closed.
7. Connect the proper electric supply to the motor and/or motor controller. The AC or DC motor
controller (if present) must be grounded to minimize noise to the electronic integrator. Refer
to the applicable wiring diagram to make all electrical connections between the electronic
integrator and the weighfeeder.
Note
Units with a plugged discharge switch should refer to the wiring diagram included in the
CLS100 manual.

Installing
4.1 Installation steps
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Operating Instructions, 05/2015, A5E33560691-AB 13
8. Remove only the tagged shipping bolt that is attached to the load cell. This bolt supports the
weighbridge during transport and installation.
Note
DO NOT loosen or tighten the overload bolt
—it has been factory set to minimize the
possibility of load cell damage resulting from incidental overload.
9. Remove the locking pin on the belt plow and scraper to allow them to contact the belt
properly. On units with an optional gravity tensioner and tracker the locking pin will also need
to be removed.
Note
Store these pins as they can be used to support t
he parts during a belt change.
10.Before starting the weighfeeder, make a final check to see that the conveyor belt is free of all
tools and foreign objects, and that the infeed/skirtboards are not pinching against the belt.

Installing
4.1 Installation steps
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Calibrating
5
After the weighfeeder has been properly installed, calibration of the weighing system must be
done in conjunction with the integrator. Refer to the integrator instruction manual for
programming and calibration.
A test sheet has been provided with the weighfeeder detailing the entries used during factory
calibration.
The calibration is initially done using the supplied test load data in the factory test sheets.
Material tests are recommended to achieve maximum accuracy.
5.1 Test load
The test load value for the weighfeeder is given on the accompanying test sheet. To calculate
the test load or to change it, refer to the integrator instruction manual.
5.2 Zero
Perform the zero calibration as described in the Calibration section of the integrator manual.
Note
This calibration should be at least three belt revolutions or fi
ve minutes, whichever is longer.
5.3 Span
The test load used in the calibration procedure is based on a set of factory sized test weights (2
or more). The weights ordered will not match this value exactly and the test load will need to be
adjusted during initial calibration.
Perform the span calibration as described in the Calibration section of the integrator instruction
manual.
After the span calibration has been completed, remove the test weights and store them.

Calibrating
5.3 Span
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Connecting
6
Note
Standard wiring shown, consult wiring diagrams for optional electrical connections. On
hazardous rated versions the termination box may not be included with the weighfeeder, or
may appear different than shown.

Connecting
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