HBK PWSE User manual
PWSE
ENGLISH DEUTSCH FRANÇAIS
Mounting Instructions
Montageanleitung
Notice de montage
Hottinger Brüel & Kjaer GmbH
Im Tiefen See 45
D-64293 Darmstadt
Tel. +49 6151 803-0
Fax +49 6151 803-9100
www.hbkworld.com
Mat.: 7-2002.3361
DVS: A03361 01 Y00 01
06.2023
EHottinger Brüel & Kjaer GmbH
Subject to modifications.
All product descriptions are for general information
only. They are not to be understood as a guarantee of
quality or durability.
Änderungen vorbehalten.
Alle Angaben beschreiben unsere Produkte in allge
meiner Form. Sie stellen keine Beschaffenheits- oder
Haltbarkeitsgarantie dar.
Sous réserve de modifications.
Les caractéristiques indiquées ne décrivent nos
produits que sous une forme générale. Elles
n'impliquent aucune garantie de qualité ou de
durabilité.
PWSE
ENGLISH DEUTSCH FRANÇAIS
Mounting Instructions
PWSE
TABLE OF CONTENTS
2
TABLE OF CONTENTS
1 Safety instructions 3................................................
2 Markings used 6....................................................
2.1 The markings used in this document 6.................................
2.2 The marking used on the product 6....................................
3 Conditions on site 7.................................................
3.1 Protection against corrosion 7........................................
3.2 Deposits 7.........................................................
4 Mechanical installation 8............................................
4.1 Important precautions during installation 8..............................
4.2 Mounting 8........................................................
5 Electrical connection 10..............................................
5.1 Connection with six‐wire configuration 10................................
5.2 Connection with four‐wire configuration 10...............................
5.3 Shortening the cable 11...............................................
5.4 Cable extension 11...................................................
5.5 EMC protection 11...................................................
6 Specifications 12....................................................
7 Dimensions 14......................................................
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PWSE
1 SAFETY INSTRUCTIONS
Proper use
Load cells of the PWSE type series are designed for technical weighing applications
within the load limits detailed in the specifications. Any other use is not the designated
use.
The load cells may only be installed by qualified personnel in compliance with the spe
cifications and with the safety requirements and regulations of these mounting instruc
tions. It is also essential to observe the applicable legal and safety regulations for the
application concerned. The same applies to the use of accessories.
Load cells are not intended for use as safety components. Please also refer to the sec
tion: “Additional safety precautions". Proper and safe operation of the load cells requires
proper transportation, correct storage, siting and mounting, and careful operation.
Loading capacity limits
The data in the technical data sheet must be complied with when using the load cells. In
particular, the respective maximum loads specified must never be exceeded. The follow
ing limits set out in the specifications must not be exceeded, e.g.:
SLimit load
SLimit load at max. eccentricity
SLimit lateral loading
SBreaking loads
STemperature limits
SLimits of electrical loading capacity
Note that, when several load cells are installed in a scale, there is not always an even dis
tribution of load on the individual load cells.
Use as a machine element
The load cells can be used as machine elements. When used in this manner, it must be
noted that, to favor greater sensitivity, the load cell is not designed with the safety factors
usual in mechanical engineering. Please refer here to the section “Loading capacity lim
its" and to the specifications.
Accident prevention
The prevailing accident prevention regulations must be taken into account, even though
the maximum capacity values in the destructive range are well in excess of the full scale
value.
PWSE
4
Additional safety precautions
Load cells cannot (as passive transducers) implement any (safety‐relevant) cutoffs. This
requires additional components and constructive measures for which the installer and
operator of the plant is responsible.
In cases where a breakage or malfunction of the load cells would cause injury to persons
or damage to equipment, the user must take appropriate additional safety measures that
meet at least the requirements of applicable safety and accident prevention regulations
(e.g. automatic emergency shutdown, overload protection, catch straps or chains, or
other fall protection).
The layout of the electronics conditioning the measurement signal should be such that
measurement signal failure does not cause damage.
General dangers of failing to follow the safety instructions
Load cells are state‐of‐the‐art and reliable. Transducers can give rise to residual dangers
if they are incorrectly operated or inappropriately mounted, installed and operated by
untrained personnel. Everyone involved with siting, starting up, operating or repairing a
load cell must have read and understood the Mounting Instructions and in particular the
technical safety instructions. The load cells can be damaged or destroyed by non‐desig
nated use of the load cells or by non‐compliance with the mounting and operating instruc
tions, these safety instructions or any other applicable safety regulations (BG safety and
accident prevention regulations) when using the load cells. Load cells can break, particu
larly in the case of overloading. The breakage of a load cell can also cause damage to
property or injury to persons in the vicinity of the load cell.
If load cells are not used according to their designated use, or if the safety instructions or
specifications in the mounting and operating instructions are ignored, it is also possible
that the load cells may fail or malfunction, with the result that persons or property may be
affected (due to the loads acting on or being monitored by the load cells).
The scope of supply and performance of the transducer covers only a small area of
weighing technology, as measurements with (resistive) strain gauge sensors presuppose
the use of electronic signal processing. In addition, equipment planners, installers and
operators should plan, implement and respond to the safety engineering considerations
of the weighing technology in such a way as to minimize residual dangers. Pertinent
national and local regulations must be complied with.
Conversions and modifications
The transducer must not be modified from the design or safety engineering point of view
except with our express agreement. Any modification shall exclude all liability on our part
for any damage resulting therefrom.
Maintenance
The PWSE load cells are maintenance free.
5
PWSE
Selling on
If the load cell is sold on, these mounting instructions must be included with the load cell.
Environmental protection, disposal
In accordance with national and local environmental protection and material recovery and
recycling regulations, old transducers that can no longer be used must be disposed of
separately and not with normal household waste.
If you need more information about waste disposal, please contact your local authorities
or the dealer from whom you purchased the product.
Qualified personnel
Qualified personnel means persons entrusted with siting, mounting, starting up and oper
ating the product, who possess the appropriate qualifications for their function.
This includes people who meet at least one of the three following requirements:
SKnowledge of the safety concepts of automation technology is a requirement and as
project personnel, you must be familiar with these concepts.
SAs automation plant operating personnel, you have been instructed how to handle the
machinery. You are familiar with the operation of the equipment and technologies
described in this documentation.
SAs commissioning engineers or service engineers, you have successfully completed
the training to qualify you to repair the automation systems. You are also authorized
to activate, ground and label circuits and equipment in accordance with safety engin
eering standards.
PWSE
MARKINGS USED
6
2 MARKINGS USED
2.1 The markings used in this document
Important instructions for your safety are specifically identified. It is essential to follow
these instructions in order to prevent accidents and damage to property.
Symbol Significance
WARNING This marking warns of a potentially dangerous situ
ation in which failure to comply with safety require
ments can result in death or serious physical injury.
CAUTION This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements can result in slight or moderate physical
injury.
Notice This marking draws your attention to a situation in
which failure to comply with safety requirements can
lead to damage to property.
Important
This marking draws your attention to important in
formation about the product or about handling the
product.
Tip
This marking indicates application tips or other
information that is useful to you.
Information
This marking draws your attention to information
about the product or about handling the product.
Emphasis
See …
Italics are used to emphasize and highlight text and
identify references to sections, diagrams, or external
documents and files.
2.2 The marking used on the product
CE mark
The CE mark enables the manufacturer to guarantee that the product com
plies with the requirements of the relevant EC directives (the declaration of
conformity is available at http://www.hbm.com/HBMdoc).
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PWSE
CONDITIONS ON SITE
3 CONDITIONS ON SITE
The PWSE series load cells reach the protection class IP67.
3.1 Protection against corrosion
The load cells must be protected against chemicals that could attack the transducer body
(stainless) steel or the cable.
Notice
Acids and all substances that release ions also attack stainless steels and their welded
seams.
Should there be any corrosion, this could cause the transducer to fail. In this case, appro
priate protective measures should be implemented.
3.2 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate sufficiently to
divert some of the measuring force onto the housing, thus invalidating the measured
value (force shunt).
PWSE
MECHANICAL INSTALLATION
8
4 MECHANICAL INSTALLATION
4.1 Important precautions during installation
SHandle the transducer with care.
SWelding currents must not be allowed to flow over the transducer. If there is a risk
that this might happen, you must use a suitable low‐ohm connection to electrically
bypass the transducer. HBM, for example, provides the highly flexible EEK ground
cable, which can be screwed on above and below the transducer.
SMake sure that the transducer cannot be overloaded.
WARNING
There is a danger of the transducer breaking if it is overloaded. This can cause danger for
the operating personnel of the system in which the transducer is installed.
Implement appropriate safety measures to avoid overloads or to protect against resulting
dangers.
Notice
Load cells are precision measuring elements and need to be handled carefully. Dropping or
knocking the transducer may cause permanent damage. Make sure that the transducer
cannot be overloaded, even while it is being mounted.
4.2 Mounting
Attach the load cells at the mounting holes and apply the load to the other end. The
screws and tightening torques to be used are given in the following table:
Maximum capacity Thread Min. property class Tightening torque1)
100 …300kg M10 10.9 66N⋅m
500 …750kg M12 10.9 115N⋅m
1) Recommendedvalue for the specified property class. Please comply with the screw manufacturer's
instructions with regard to screw dimensions.
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