HBM U9C Series User manual

Mounting Instructions | Montageanleitung |
Notice de montage | Istruzioni per il montaggio
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U9C

Hottinger Baldwin Messtechnik GmbH
Im Tiefen See 45
D-64239 Darmstadt
Tel. [phone]
Fax [phone]
[email protected]
www.hbm.com
Mat.: 7-2002.3815
DVS: A3815-1.4 HBM: public
02.2018
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
U9C

2A3815-1.4 HBM: public U9C
English
1 Safety instructions 3........................................
2 Scope of supply and equipment variants 7...................
3 General application instructions 9...........................
4 Structure and mode of operation 10...........................
4.1 Transducers 10...............................................
4.2 SG covering agent 10.........................................
5 Conditions on site 12........................................
5.1 Ambient temperature 12.......................................
5.2 Moisture and corrosion protection 12............................
5.3 Deposits 13..................................................
6 Mechanical installation 14....................................
6.1 Important precautions during installation 14......................
6.2 General installation guidelines 14...............................
6.3 Mounting the U9C 16..........................................
6.3.1 Mounting with tension and compression bars 16..................
6.3.2 Mounting with knuckle eyes 17.................................
7 Electrical connection 19......................................
7.1 Connection to an amplifier 19...................................
7.2 Cable extension and cable shortening 20.........................
7.3 EMC protection 20............................................
7.4 TEDS transducer identification 21...............................
8 Dimensions 22..............................................
9 U9C specifications 26........................................
9.1 Cable wire assignments, fourwire configuration 28................
9.2 Versions and order numbers 29.................................

Safety instructions
U9C A3815-1.4 HBM: public 3
1 Safety instructions
Designated use
The force transducers in the type series U9C are solely designed for measur
ing static and dynamic tensile and compressive forces within the load limits
specified by the technical data for the respective maximum capacities. Any
other use is not the designated use.
To ensure safe operation, it is essential to comply with the regulations in the
mounting instructions, the safety requirements listed below, and the data speci
fied 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
refer to the section: "Additional safety precautions". Proper and safe operation
of the force transducer 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
force transducer. 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
SBending and torsional torques
SBreaking forces
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.

Safety instructions
4A3815-1.4 HBM: public U9C
Use as a machine element
The 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 section "Loading capacity limits" and to the specifications.
Accident prevention
The prevailing accident prevention regulations must be taken into account,
even though the breaking force values in the destructive range are well in
excess of the full scale value.
Additional safety precautions
The 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 acci
dent 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
The force transducers 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. 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 applica
ble safety regulations (BG safety and accident prevention regulations) when
using the force transducers. A force transducer can break, particularly in the

Safety instructions
U9C A3815-1.4 HBM: public 5
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 act
ing 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
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 regu
lations must be complied with.
Markings used
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.
CAUTION This marking warns of a potentially dangerous situa
tion in which failure to comply with safety require
ments 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
could 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.
Emphasis
See …
Italics are used to emphasize and highlight text and
identify references to sections, diagrams, or external
documents and files.

Safety instructions
6A3815-1.4 HBM: public U9C
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 force transducers of the U9C series are maintenance-free.
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 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 operating the product who possess 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 technology is a require
ment and as project personnel, you must be familiar with these concepts.
SAs automation plant operating personnel, they 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 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 regu
lations.

Scope of supply and equipment variants
U9C A3815-1.4 HBM: public 7
2 Scope of supply and equipment variants
SU9C force transducers
SU9C mounting instructions
SManufacturing certificate
Equipment variants
All force transducers are available in different versions. The following options
are available:
1. Cable
The U9C is equipped with a cable 1.5m long in the standard version. You
can also order the force transducer with the following cable lengths:
-3m
-5m
-6m
-7m
- 12 m
2. Connector
We can mount one of the following connectors on the U9C if requested:
- SUBD connector, 15-pin: 15-pin connector for connection to numerous
amplifier systems, e.g. MGCplus, Scout, MP85, etc.
- SUBHG connector: 15-pin connector for connection to appropriate
amplifier systems, e.g. the HBM QuantumX system
- 3106 PEMV connector (Greenline): For connection to appropriate ampli
fier systems, e.g. MGCplus with AP03.
- Free ends: Delivery of transducer without connector
3. TEDS
You can order the force transducer with transducer identification ("TEDS").
TEDS (Transducer Electronic Data Sheet) allows you to store the trans
ducer data (characteristic values) in a chip that can be read out by a con

Scope of supply and equipment variants
8A3815-1.4 HBM: public U9C
nected 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 U9C connector, therefore it is not possible to
fit TEDS in the variant with "free cable ends".

General application instructions
U9C A3815-1.4 HBM: public 9
3 General application instructions
The force transducers are suitable for measuring tensile and compressive
forces. They provide highly accurate static and dynamic force measurements
and must therefore be handled very carefully. Particular care must be taken
during transport and installation. Dropping and knocking the transducer may
cause permanent damage.
The U9C series force transducers have two external threads into which the
forces to be measured must be applied.
The specifications in Chapter 9, Page 26, list the permissible limits for mechan
ical, thermal and electrical stress. It is essential to observe these limits when
planning the measuring set-up, during installation and, ultimately, during opera
tion.

Structure and mode of operation
10 A3815-1.4 HBM: public U9C
4 Structure and mode of operation
4.1 Transducers
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 200N, on
the top side.This method offers very good protection against environmental
conditions so that the U9C reaches the 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
U9C A3815-1.4 HBM: public 11
Fig. 4.1 The thin plate on the top side must not be damaged in the variants with
nominal (rated) forces 50N, 100N and 200N; the same applies for the plate
on the bottom of all force transducers.

Conditions on site
12 A3815-1.4 HBM: public U9C
5 Conditions on site
The U9C series force transducers are made of rustless materials. It is never
theless 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 compen
sated.
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 gradi
ents can have a negative effect on the 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. the 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.
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.

Conditions on site
U9C A3815-1.4 HBM: public 13
5.3 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate suffi
ciently to divert some of the measuring force, thus invalidating the measured
value. (Force shunt). Also remember to lay the connection cable so that no
force shunts are produced at the lower nominal (rated) forces (<1kn).

Mechanical installation
14 A3815-1.4 HBM: public U9C
6 Mechanical installation
6.1 Important precautions during installation
SHandle the transducer with care.
SEnsure that the force application parts mounted on the sensor are designed
to withstand the forces to be measured.
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 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.
The cable fastening side of the transducer should always be connected directly
with the rigid customer-side force transfer area. Ensure that the cable is laid so
that, where possible, no force shunt is caused by the cable.
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 (see Specifications
in Chapter 123, Page 456) or to protect against resulting dangers.
6.2 General installation guidelines
The forces to be measured must act on the transducer as accurately as possi
ble in the direction of measurement. Torques, 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.

Mechanical installation
U9C A3815-1.4 HBM: public 15
Eccentric loads can lead to a bending moment load. The bending moment can
be calculated by multiplying the applied force with the eccentricity:
Mb= F*e
Fnom Force in direction of measurement, centric
application
Fex Force in direction of measurement, but
applied outside centre of force transducer
e Eccentricity, distance between centre of
force transducer and an eccentrically
applied force Fex
FQForce applied vertically to direction of
measurement (lateral force)
MbBending moment
MdTorque
Fnom Fex
FQ
Mb
Md
e
Fig. 6.1 Parasitic forces and torques
Notice
When installing and operating the transducers, please note the maximum para
sitic forces - lateral forces (due to oblique application), bending moment (due to
eccentric force application) and torques, see specifications in Chapter 9, and
the maximum permissible loading capacity of the force application parts used
(possibly provided by the customer).
Please also note the maximum loading capacity of the mounting parts used
and of the tension/compression bars, screws and knuckle eyes.

Mechanical installation
16 A3815-1.4 HBM: public U9C
6.3 Mounting the U9C
6.3.1 Mounting with tension and compression bars
In this mounting variant, the transducer is mounted with tension/compression
bars on a construction element and can measure tensile and compressive
forces. Alternating loads are also correctly recorded if the transducer is
mounted without axial play. For dynamic alternating loads, the upper and lower
threaded connectors must be pre-stressed to above the maximum force to be
measured and then locked in place.
1. Installation and locking with initial stress (for dynamic loading):
- Unscrew the locknut and screw on the threaded connector
- Pre-stress transducer to 110% operating load in tensile direction. The
transducer itself can be used to measure this force
- Hand-tighten the locknut
- Relieve load on transducer
Notice
If the torque for locking is shunted through the transducer, ensure that the
maximum torque is not exceeded. See specifications.
2. Mounting with locking
Screw on the load application parts and lock with a torque according to the
table below.

Mechanical installation
U9C A3815-1.4 HBM: public 17
Notice
As the initial stress also depends on the friction between the locknut and
thread, the initial stress cannot be precisely set correctly with this method.
When using the force transducer under high alternating loads, we therefore
recommend installation using method 1 (installation and locking with initial
stress).
Nominal (rated) force range Torque
[Nm]
50N to 1kN 8
2kN to 20kN 40
50kN 200
6.3.2 Mounting with knuckle eyes
Knuckle eyes prevent the application of torsional moments and, where two
knuckle eyes are used, bending moments, together with lateral and oblique
loads. They are particularly suitable for static and quasi-static measurements.
We recommend tension/compression bars that are pliable for dynamic alternat
ing loads.
Mounting with knuckle eyes is implemented in the same manner for loads a
mounting with tension/compression bars. Knuckle eyes without locking can be
used for static and quasi-static applications.

Mechanical installation
18 A3815-1.4 HBM: public U9C
b
a
Fig. 6.2 U9C dimensions when using one or two knuckle eyes.
Nominal (rated)
force
amin amax bmin bmax
[mm]
50 to 20N 55 59 82 86
0.5 to 1kN 56 61 83 88
2 to 20kN 79 82 122 125
50kN 116 116 180 180
Tab. 6.1 U9C installation dimensions when using knuckle eyes