HBM C9C User manual

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
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C9C

Hottinger Baldwin Messtechnik GmbH
Im Tiefen See 45
D-64239 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbm.com
Mat.: 7-2001.3729
DVS: A3729-2.2 HBM: public
01.2016
EHottinger Baldwin Messtechnik 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 allgemeiner
Form. Sie stellen keine Beschaffenheits- oder Haltbarkeits
garantie 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 durablilité.
Con riserva di modifica.
Tutti i dati descrivono i nostri prodotti in forma generica e non
implicano alcuna garanzia di qualità o di durata dei prodotti
stessi.

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
English Deutsch Français Italiano
C9C

2A3729-2.2 HBM: public C9C
English
1 Safety instructions 3........................................
2 Scope of supply and equipment variants 9...................
3 General application instructions 11...........................
4 Structure and mode of operation 12...........................
4.1 Transducer 12................................................
4.2 SG covering agent 12.........................................
5 Conditions on site 14........................................
5.1 Ambient temperature 14.......................................
5.2 Moisture and corrosion protection 14............................
5.3 Deposits 15..................................................
6 Mechanical installation 16....................................
6.1 Important precautions during installation 16......................
6.2 General installation guidelines 17...............................
7 Electrical connection 20......................................
7.1 Connection to an amplifier 20...................................
7.2 Cable extension and cable shortening 21.........................
7.3 EMC protection 22............................................
7.4 TEDS transducer identification 23...............................
8 Dimensions 24..............................................
9 C9C Specifications 26........................................
9.1 Versions and ordering numbers 28..............................

Safety instructions
C9C A3729-2.2 HBM: public 3
1 Safety instructions
Intended use
Force transducers in the C9C type series are designed
solely for measuring static and dynamic compressive
forces within the load limits stated in the specifications.
Any other use is not appropriate.
To ensure safe operation, it is essential to comply with
the regulations in the mounting instructions, the safety
requirements listed below, and the data specified in the
technical data sheets. It is also essential to observe the
applicable legal and safety regulations for the application
concerned.
Force transducers are not intended for use as safety
components. Please also follow the instructions in the
"Additional safety precautions" section. Proper and safe
operation of force transducers requires proper
transportation, correct storage, siting and mounting, and
careful operation.
Load carrying capacity limits
It is essential to comply with the information in the
technical data sheets when using force transducers. In
particular, the respective maximum loads specified must
never be exceeded. The following limits set out in the
technical data sheets must not be exceeded
SLimit forces
SLateral limit forces (by oblique application, if
necessary)
SExceeding the permissible eccentricity of force
application
SBreaking forces

Safety instructions
4A3729-2.2 HBM: public C9C
SPermissible dynamic loads
STemperature limits
SElectrical load limits
Please note that when several force transducers are
interconnected, the load/force distribution is not always
uniform.
Use as a machine element
Force transducers can be used as machine elements.
When used in this manner, note that to favor greater
sensitivity, force transducers were not designed with the
safety factors usual in mechanical engineering. Please
refer here to the "Load‐carrying capacity limits" section
and to the specifications.
Accident prevention
The prevailing accident prevention regulations must be
taken into account, even though the nominal (rated) force
values in the destructive range are well in excess of the
full scale value.
Additional safety precautions
Force transducers 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 force
transducer would cause injury to persons or damage to
equipment, the user must take appropriate additional
safety measures that meet at least the applicable safety
and accident prevention regulations (e.g. automatic

Safety instructions
C9C A3729-2.2 HBM: public 5
emergency shutdown, overload protection, catch straps
or chains, or other fall protection).
The electronics conditioning the measurement signal
should be designed so that measurement signal failure
does not cause damage.
General dangers of failing to follow the safety
instructions
The force transducers are state-of-the-art and reliable.
There may be risks involved if the transducers are
mounted, sited, installed and operated inappropriately, or
by untrained personnel. Every person involved with
siting, starting-up, operating or repairing a force
transducer must have read and understood the mounting
instructions and in particular the technical safety
instructions. The force transducers can be damaged or
destroyed by non-designated use of the force transducer
or by non-compliance with the mounting and operating
instructions, these safety instructions or other applicable
safety regulations (BG safety and accident prevention
regulations) when using the force transducers. A force
transducer can break, particularly in the case of
overloading. The breakage of a force transducer can
cause damage to property or injury to persons in the
vicinity of the force transducer.
If force transducers 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 force transducer
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 force transducer).
The scope of supply and performance of the transducer
covers only a small area of force measurement
technology, as measurements with (resistive) strain

Safety instructions
6A3729-2.2 HBM: public C9C
gauge sensors presuppose the use of electronic signal
conditioning. Equipment planners, installers and
operators should always plan, implement and respond to
the safety engineering considerations of force
measurement technology in such a way as to minimize
residual dangers. Pertinent national and local regulations
must be complied with.
The markings used in this document
Symbol Significance
WARNING This marking warns of a potentially dangerous
situation in which failure to comply with safety
requirements 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.
Note 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
information about the product or about handling the
product.
Tip
This marking indicates application tips or other
information that is useful to you.
Emphasis
See …
Italics are used to emphasize and highlight text and
identify references to sections, diagrams, or external
documents and files.
Conversions and modifications
The transducer must not be modified from the design or
safety engineering point of view except with our express

Safety instructions
C9C A3729-2.2 HBM: public 7
agreement. Any modification shall exclude all liability on
our part for any damage resulting therefrom.
Maintenance
The force transducers of the C9C series are
maintenance free
Waste 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 garbage.
If you need more information about 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 operating the product who
possess the appropriate qualifications for their function.
This includes people who meet at least one of these
three requirements:
SYou know about the safety concepts of automation
and as project personnel, are 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 operators or service engineers, you have
successfully completed the training to qualify you to
repair the automation systems. You are also

Safety instructions
8A3729-2.2 HBM: public C9C
authorized to activate, ground and label circuits and
equipment in accordance with safety engineering
standards.
It is also essential to comply with the legal and safety
requirements for the application concerned during use.
The same applies to the use of accessories.
The force transducer may only be installed by qualified
personnel, strictly in accordance with the specifications
and with the safety requirements and regulations.

Scope of supply and equipment variants
C9C A3729-2.2 HBM: public 9
2 Scope of supply and equipment variants
SC9C force transducer
SC9C mounting instructions
SManufacturing certificate
Equipment variants
All force transducers are available in different versions.
The following options are available:
1. Cables
The standard version of the C9C is equipped with a
1.5 m long cable. You can also order the force
transducer with the following cable lengths:
-3m
-5m
-6m
-7m
- 12 m
2. Plugs
We can fit one of the following plugs to the C9C on
request:
- SUBD connector, 15-pin: a 15-pin plug for
connection to numerous amplifier systems, e.g.
MGCplus, Scout, MP85, etc.
- SUBHD connector: a 15-pin plug for connection to
appropriate amplifier systems, e.g. the HBM
QuantumX system

Scope of supply and equipment variants
10 A3729-2.2 HBM: public C9C
- 3106 PEMV connector (Greenline): for connection
to appropriate amplifier systems, e.g. MGCplus
with AP03.
- Free ends: transducer delivered without plugs
3. TEDS
You can order the force transducer with transducer
identification ("TEDS"). TEDS (Transducer Electronic
Data Sheet) allows you to store the transducer data
(characteristic values) in a chip that can be read out
by a connected measuring device (with an appropriate
amplifier). HBM records the TEDS data before
delivery so that no parameterization of the amplifier is
necessary.
TEDS can only be fitted in the plug of the C9C,
therefore it is not possible to equip the "free cable
ends" version with TEDS.

General application instructions
C9C A3729-2.2 HBM: public 11
3 General application instructions
Force transducers are suitable for measuring
compressive forces. They provide highly accurate static
and dynamic force measurements and must therefore be
handled very carefully. Particular care must be taken
during transportation and installation. Dropping and
knocking the transducer may cause permanent damage.
C9C series force transducers have a convex force
application part, to which the forces to be measured must
be applied.
The Specifications section 9 on page 26 lists the
permissible limits for mechanical, thermal and electrical
loading. It is essential to observe these limits when
planning the measuring set-up, during installation and,
ultimately, during operation.

Structure and mode of operation
12 A3729-2.2 HBM: public C9C
4 Structure and mode of operation
4.1 Transducer
The measuring body is a steel loaded member on which
strain gauges (SG) are installed. The influence of a force
deforms the measuring body, so there is deformation in
places where the strain gauges are installed. The SG are
attached so that two are stretched and two are
compressed when a force is applied. The strain gauges
are wired to form a Wheatstone bridge circuit. They
change their ohmic resistance in proportion to their
change in length and so unbalance the Wheatstone
bridge. If there is an excitation voltage, the circuit
produces an output signal proportional to the change in
resistance and thus also proportional to the applied force.
The strain gauge arrangement is chosen to compensate,
as much as possible, for parasitic forces and moments
(e.g. lateral forces and eccentricity influences), as well as
the effects of temperature.
4.2 SG covering agent
To protect the SG, the force transducers have thin cover
plates that are welded on the bottom and, in versions
with a nominal (rated) force of up to 200 N, on the top.
This method offers very good protection against
environmental influences so that the C9C achieves
protection class IP67. In order to retain the protective
effect, these plates must not be removed or damaged in
any way.

Structure and mode of operation
C9C A3729-2.2 HBM: public 13
Fig. 4.1 The underside of the transducer is fitted with a thin
metal plate to protect the strain gauges
In versions with nominal (rated) forces up to 200 N, there
is also a metal plate on the top of the transducer, that
also needs to be handled with care.

Conditions on site
14 A3729-2.2 HBM: public C9C
5 Conditions on site
C9C series force transducers are made of rustless
materials. It is nevertheless important to protect the
transducers from weather conditions such as rain, snow,
ice and salt water.
5.1 Ambient temperature
The effects of temperature on the zero signal and on
sensitivity are compensated.
To obtain optimum measurement results, the nominal
(rated) temperature range must be complied with. The
compensation of the temperature effect on the zero point
is implemented with great care, nevertheless
temperature gradients can have a negative effect on zero
point stability. Constant or very slowly changing
temperatures are therefore best. A radiation shield and
all-round thermal insulation produce noticeable
improvements. However, they must not be allowed to set
up a force shunt, i.e. slight movement of the force
transducer must not be prevented.
5.2 Moisture and corrosion protection
The force transducers are hermetically encapsulated and
are therefore very insensitive to moisture. The
transducers achieve protection class IP67.
Despite the careful encapsulation, it makes sense to
protect the transducers against permanent exposure to
moisture.

Conditions on site
C9C A3729-2.2 HBM: public 15
The force transducer must be protected against
chemicals that could attack the steel.
With stainless steel force transducers, note that acids
and all materials which release ions will in general also
attack stainless steels and their welded seams. Should
there be any corrosion, this could cause the force
transducer to fail. In this case, appropriate protective
measures must be implemented.
5.3 Deposits
Dust, dirt and other foreign matter must not be allowed to
accumulate sufficiently to divert some of the measuring
force around the force transducer, thus invalidating the
measured value. (Force shunt). The relevant areas are
marked in Fig. 5.1.
Fig. 5.1 Deposits must not be allowed to form on the fine
hatched area, as this could cause a force shunt.

Mechanical installation
16 A3729-2.2 HBM: public C9C
6 Mechanical installation
6.1 Important precautions during
installation
SHandle the transducer with care
SComply with the requirements for the force application
parts, as specified in section 6.2.
SWelding currents must not be allowed to flow over the
transducer. If there is a risk that this might happen,
you must provide a suitable low-ohm connection to
electrically bypass the transducer. HBM offers the
highly flexible EEK ground cable in various lengths for
this purpose, which can be screwed on above and
below the transducer.
SMake sure that the transducer is not 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,as well as for people in the vicinity.
Implement appropriate safety measures to avoid
overloads (also see the Specifications section 9, on
page 26) or to protect against resulting dangers.

Mechanical installation
C9C A3729-2.2 HBM: public 17
6.2 General installation guidelines
The forces to be measured must act on the transducer
as accurately as possible in the direction of
measurement. Bending moments resulting from lateral
force, eccentric loading and the lateral forces
themselves, may produce measurement errors and
destroy the transducer, if limit values are exceeded.
Fnom Force in direction of measurement
Fex Force in direction of measurement, outside the
center of the force transducer
e Eccentricity (center of force transducer - force
application distance)
Fnom Fex
Fq
e
Fig. 6.1 Parasitic forces and moments
Notice
When installing and operating the transducer, please
note the maximum parasitic forces - lateral forces (due to
oblique application), bending moments (due to eccentric
force application) and torques, see the Specifications
section 9 on page 26, and the maximum permissible
loading capacity of the force application parts used
(possibly provided by the customer).

Mechanical installation
18 A3729-2.2 HBM: public C9C
Load application is implemented via the convex load
button on the top of the force transducer.
The structural component that applies the force to the
convex load application part must be ground and have a
hardness of at least 40 HRC.
HBM provides EDO9 thrust pieces for the C9C, which
are used to keep torques and bending moments away
from the transducer. The thrust pieces naturally have the
correct hardness and surface quality.
Fig. 6.2 Using the EDO9 thrust piece
The substructure must be capable of absorbing the force
to be measured. Remember that the stiffness of the
overall system depends on the stiffness of the force
application part and the substructure. Please also note
that the substructure must ensure that force is always
applied to the transducer vertically, i.e. there must be no
inclination, even under full load.
There are threaded holes underneath the adapter, by
means of which the C9C can also be mounted upside
down or vertically.