HBM C2 Series User manual

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
English Deutsch Français Italiano
C2

Hottinger Baldwin Messtechnik GmbH
Im Tiefen See 45
D-64239 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbm.com
Mat.: 7-2002.0144
DVS: A0674-5.0 HBM: public
08.2015
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
C2

2A0674-5.0 HBM: public C2
English
1 Safety Instructions 4........................................
2 Markings used 9............................................
2.1 The markings used in this document 9..........................
2.2 Symbols on the device 9......................................
3 Scope of supply and equipment variants 10...................
3.1 Scope of supply 10............................................
3.2 Equipment variants 10.........................................
3.3 Accessories 11...............................................
4 General application instructions 12...........................
5 Structure and mode of operation 13...........................
5.1 Transducer 13................................................
5.2 Strain gage covering agent 13..................................
6 Conditions on site 15........................................
6.1 Ambient temperature 15.......................................
6.2 Moisture and corrosion protection 15............................
6.3 Deposits 16..................................................
6.4 Effect of ambient pressure 16..................................
7 Mechanical installation 17....................................
7.1 Important precautions during installation 17......................
7.2 General installation guidelines 18...............................
7.3 Mounting 19..................................................
8 Electrical connection 21......................................
8.1 Connection to an amplifier 21...................................
8.2 Extension cables and cable shortening 22........................
8.3 EMC protection 23............................................

C2 A0674-5.0 HBM: public 3
9 TEDS transducer identification 24............................
10 Dimensions 25..............................................
11 Versions and ordering numbers 27...........................
12 Specifications 29............................................

Safety Instructions
4A0674-5.0 HBM: public C2
1 Safety Instructions
Intended use
Force transducers in the C2 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 relevant
application.
Force transducers are not intended for use as safety
components. Please also refer to the "Additional safety
precautions" section on the following page. Proper and
safe operation of force transducers requires proper trans
portation, correct storage, setup and mounting, and care
ful operation.
Load‐carrying capacity limits
The information in the technical data sheets must be
complied with when using force transducers. The respec
tive specified maximum loads in particular must never be
exceeded. The following limits set out in the technical
data sheets must not be exceeded:
SForce limits
SLateral force limits
SBending moment and torque
SBreaking forces
SPermissible dynamic loads

Safety Instructions
C2 A0674-5.0 HBM: public 5
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 sen
sitivity, force transducers were not designed with the
safety factors usual in mechanical engineering. Please
refer here to the "Load-carrying capacity limits" section
and Chapter 12, starting on page 29.
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 addi
tional 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 precautions that meet at least the applicable
safety and accident prevention regulations (e.g. auto
matic emergency shutdown, overload protection, catch
straps or chains, or other fall protection).

Safety Instructions
6A0674-5.0 HBM: public C2
The electronics conditioning the measurement signal
should be designed so that measurement signal failure
does not subsequently cause damage.
General dangers of failing to follow the safety
instructions
Force transducers are state-of-the-art and reliable. There
may be dangers involved if the transducers are mounted,
set up, installed and operated inappropriately, or by
untrained personnel. Every person involved with setting
up, starting-up, operating or repairing a force transducer
must have read and understood the mounting instruc
tions 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 regu
lations (BG safety and accident prevention regulations)
when using the force transducers. A force transducer can
break, particularly in the case of overloading. The break
age 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 as intended, or if the
safety instructions or specifications in the mounting and
operating instructions are ignored, it is also possible that
a force transducer may fail or malfunction, with the result
that persons may be injured or property damaged (due to
the loads acting on or being monitored by the force trans
ducer).
The scope of supply and performance of the transducer
covers only a small area of force measurement technol
ogy, as measurements with strain gage sensors presup
pose the use of electronic signal processing. Equipment
planners, installers and operators should always plan,
implement and respond to the safety engineering consid

Safety Instructions
C2 A0674-5.0 HBM: public 7
erations of force measurement technology in such a way
as to minimize residual dangers. Pertinent national and
local regulations must be complied with.
Conversions and modifications
The design or safety engineering of the transducer must
not be modified without our express permission. Any
modification shall exclude all liability on our part for any
damage resulting therefrom.
Maintenance
The force transducers of the C2 series are maintenance
free.
Disposal
In accordance with national and local environmental pro
tection and material recovery and recycling regulations,
old transducers that can no longer be used must be dis
posed of separately and not with normal household
garbage.
If you need more information about disposal, please con
tact 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 pos
sess the appropriate qualifications for their function.
This includes people who meet at least one of these
three requirements:
SKnowledge of the safety concepts of automation tech
nology is a requirement and as project personnel, you
must be familiar with these concepts.

Safety Instructions
8A0674-5.0 HBM: public C2
SAs automation plant operating personnel, you have
been instructed how to handle the machinery. You are
familiar with the operation of the equipment and tech
nologies described in this documentation.
SAs commissioning engineers or service engineers,
you have successfully completed the training to repair
the automation systems. You are also 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 also 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.

Markings used
C2 A0674-5.0 HBM: public 9
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 situa
tion in which failure to comply with safety require
ments can result in death or serious 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 infor
mation about the product or about handling the prod
uct.
Tip
This marking indicates application tips or other infor
mation 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 Symbols on the device
CE mark
The CE mark enables the manufacturer to guarantee that
the product complies with the requirements of the rele
vant EC directives (the Declaration of Conformity can be
found on the HBM website (www.hbm.com) under
HBMdoc).

Scope of supply and equipment variants
10 A0674-5.0 HBM: public C2
3 Scope of supply and equipment variants
3.1 Scope of supply
SC2 force transducer
SC2 mounting instructions
SManufacturing certificate
3.2 Equipment variants
All force transducers are available in different versions.
The following options are available:
1. Cable length
Various cable lengths between 3 m and 30 m are
available
2. Connection variants (plug)
The force transducer can be ordered with various
plugs, making it easy to connect to HBM amplifiers:
SFree ends to the cable (amplifier with connection
clamps, e.g. PMX, Digiclip, etc.)
SD-Sub plug, 15-pin (MGC+, Spider8, Scout, etc.)
SD-SUB HD plug, 15-pin (many modules of the Quan
tum series)
SMS plug ME3106PEMV for devices of an older con
struction type, e.g. DK38
SRJ45 plug for connecting to Espresso DAQ
SCon P1016. Connection to the devices of the
SomatXr series

Scope of supply and equipment variants
C2 A0674-5.0 HBM: public 11
3. TEDS transducer identification
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 by a
connected measuring device (with an appropriate
amplifier). HBM records the TEDS data before deliv
ery so that no parameterization of the amplifier is nec
essary. (also see Chapter 9, page 24).
3.3 Accessories
Accessories (not included in the scope of supply) Ordering number
Ground cable, 400 mm 1-EEK4
Ground cable, 600 mm 1-EEK6
Ground cable, 800 mm 1-EEK8
Thrust piece for nominal (rated) forces 500 N…10 kN 1-EPO3/200kg
Thrust piece for nominal (rated) forces 20 kN…50 kN 1-EPO3R/5t
Thrust piece for nominal (rated) forces 100 kN…200 kN 1-EPO3R/20t

General application instructions
12 A0674-5.0 HBM: public C2
4 General application instructions
Force transducers are suitable for measuring compres
sive forces. They provide highly accurate static and
dynamic force measurements and must therefore be
handled very carefully. Particular care must be taken
when transporting and installing the devices. Dropping
and knocking the transducer may cause permanent dam
age.
C2 series force transducers have a convex force applica
tion part, to which the forces to be measured must be
applied.
Chapter 12 “Specifications“, starting on page 29, lists the
permissible limits for mechanical, thermal and electrical
stress. It is essential to observe these limits when plan
ning the measuring set-up, during installation and, ulti
mately, during operation.

Structure and mode of operation
C2 A0674-5.0 HBM: public 13
5 Structure and mode of operation
5.1 Transducer
The measuring body is a stainless steel loaded member,
on which strain gages (SG) are installed. The effect of a
force deforms the measuring body, so there is strain in
places where the strain gages are installed. The SG are
attached so that four are extended and four are short
ened when a force is applied. The strain gages are wired
to form a Wheatstone bridge circuit. The SG change their
ohmic resistance in proportion to their change in length
and so unbalance the Wheatstone bridge. If there is a
bridge excitation voltage, the circuit produces an output
signal proportional to the change in resistance and thus
also proportional to the applied force. The strain gage
arrangement is chosen to compensate, as much as pos
sible, for parasitic forces and moments (e.g. lateral
forces and torques), as well as the effects of tempera
ture.
5.2 Strain gage covering agent
To protect the SG, the force transducers have thin cov
ers that are welded at the base. Both variants offer good
protection against environmental influences in general. In
order to retain the protective effect, these plates must not
be removed or damaged in any way.

Structure and mode of operation
14 A0674-5.0 HBM: public C2
Fig. 5.1 The plate at the base of the sensor must not be
damaged because otherwise, there would be no
hermetic encapsulation.

Conditions on site
C2 A0674-5.0 HBM: public 15
6 Conditions on site
The C2 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.
6.1 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, but temperature gradi
ents can still have a negative effect on the stability of
zero. 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 pre
vented.
6.2 Moisture and corrosion protection
The force transducers are hermetically encapsulated and
are therefore very insensitive to moisture. The transduc
ers achieve protection class IP67.
Despite the careful encapsulation, it makes sense to pro
tect the transducers against permanent exposure to
moisture.
The force transducer must be protected against chemi
cals that could attack the steel.

Conditions on site
16 A0674-5.0 HBM: public C2
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 trans
ducer to fail. In this case, an appropriate means of pro
tection must be provided.
6.3 Deposits
Dust, dirt and other foreign matter must not be allowed to
accumulate sufficiently to conduct any of the measuring
force around the transducer, thus invalidating the mea
sured value. (Force shunt). Also remember to lay the
connection cable so that no force shunts are produced at
lower nominal (rated) forces (<1 kn). It is important here
for the cable to be fixed to the same component as the
lower part of the C2.
6.4 Effect of ambient pressure
The force transducer's response to changes in air pres
sure is negligible. Please note that the force transducer
can be used at gage pressures up to 5 bar.
The following table shows the effect of air pressure on
the zero signal, subject to the nominal (rated) force being
used.
Nominal (rated)
force
N 500
kN 1 2 5 10 20 50 100 200
Max. variation of zero
point [% of nominal
(rated) force/10mbar]
0.065 0.032 0.016 0.006 0.003 0.006 0.003 0.002 0.001

Conditions on site
C2 A0674-5.0 HBM: public 17
7 Mechanical installation
7.1 Important precautions during
installation
SHandle the transducer with care.
SComply with the requirements for the force application
parts, as specified in sections 6.3 and 6.4.
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 over
loaded. This can cause danger for the operating person
nel of the system in which the transducer is installed, as
well as for people in the vicinity.
Implement appropriate safeguards to avoid a force over
shoot (also see Chapter 12 “Specifications“, page 29), or
to protect against any dangers that may result.

Conditions on site
18 A0674-5.0 HBM: public C2
7.2 General installation guidelines
The forces to be measured must act on the transducer
as accurately as possible in the direction of measure
ment. 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.
Fig. 7.1 Parasitic loads
e = eccentricity
FQ= lateral force