HBM PW29 Series User manual

A3313-1.0 en/de/fr
Single point load cells
Plattformwägezellen
Pesons plateforme
PW29...
Mounting Instructions
Montageanleitung
Notice de montage

English Page 3 ... 16................................................
Deutsch Seite 17 ... 30..............................................
Français Page 31 ... 45..............................................

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Contents Page
English
Safety instructions 4..............................................
1 Markings used 7...............................................
1.1 Symbols attached to the load cell 7..........................
1.2 The markings used in this document 7........................
2 Conditions on site 8...........................................
2.1 Corrosion protection 8......................................
2.2 Deposits 8................................................
3 Mechanical installation 9.......................................
3.1 Important precautions during installation 9....................
3.2 Mounting 9...............................................
4 Electrical connection 11.........................................
4.1 Connection with a six‐wire configuration 11....................
4.2 Connection with a four‐wire configuration 11...................
4.3 Shortening the cable 12.....................................
4.4 Extension cable 12.........................................
4.5 Parallel connection (option) 12...............................
4.6 Cable protection 12.........................................
4.7 EMC protection 13..........................................
5 Specifications 14...............................................
6 Dimensions 16.................................................

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Safety instructions
Appropriate use
Load cells of the PW290 type series are designed for technical weighing
applications within the load limits stipulated in the specifications. Any other
use is not the designated use.
Load cells must only be installed and used by qualified personnel, strictly in
accordance with the specifications and in compliance with the safety require-
ments and regulations contained in these mounting instructions. It is also
essential to observe the applicable legal and safety regulations for the applic-
ation concerned. The same applies to the use of accessories.
Load cells are not intended for use as safety components. Please also refer to
the section: “Additional safety precautions”. Proper and safe operation of load
cells requires appropriate transportation, correct storage, siting and mounting,
and careful operation.
Loading capacity limits
When using the load cells, it is essential to comply with the details given in the
technical data sheets. In particular, the respective maximum loads specified
must never be exceeded. The following values specified in the technical data
sheets, for example, must not be exceeded:
wLimit load
wLimit load at max. eccentricity
wLimit lateral loading
wBreaking loads
wTemperature limits
wLimits of electrical loading capacity
When several load cells are installed in a scale, make sure that there is not
always an even distribution of load onto the individual load cells.
Use as a machine element
Load cells can be used as machine elements. When used in this manner, it
must be noted that, to favor greater sensitivity, the load cells are 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 maximum capacity specified in the destructive range is well
in excess of the full scale value.

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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, over-
load 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.
Explosion protection version option
The following also apply to the load cells supplied with this option, that are to
be used in potentially explosive atmospheres:
wIt is essential to comply with the relevant code of practice during
installation.
wIn the explosion protection version, the connection cable of the single point
load cells has free ends (for the cable wire assignment, see section 4.1).
wThere must be compliance with the installation conditions cited in the
Certificate of Conformity and/or the Type Examination Certificate.
General dangers of failing to follow the safety instructions
Load cells 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. 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. Load cells can be damaged
or destroyed by non‐designated use of the load cells, or by non‐compliance
with the mounting and operating instructions, these safety instructions or any
other applicable safety regulations (BG safety and accident prevention regula-
tions) when using the load cells. Load cells can break, particularly in the case
of overloading. The breakage of a load cell can also cause damage to prop-
erty or injury to persons in the vicinity of the load cell.
If the load cells are not deployed 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 act-
ing 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 gage

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sensors presuppose the use of electronic signal conditioning. 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
PW290 load cells are maintenance free.
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 operating the product, who possess the appropriate qualifications for
their function.
This includes people who meet at least one of the three following require-
ments:
- Knowledge of the safety concepts of automation technology is a require-
ment and as project personnel, you must be familiar with these concepts.
- As 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.
- As 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.

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1 Markings used
1.1 Symbols attached to the load cell
Symbol:
Meaning: 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 can be found on the HBM website at www.hbm.com under
Support -> HBMdoc).
1.2 The markings used in this document
The marking below warns of a potentially dangerous situation in which failure
to comply with safety requirements can result in death or serious physical
injury.
WARNING
Description of a potentially dangerous situation
Measures to avoid/prevent the danger
The marking below draws your attention to a situation in which failure to com-
ply with safety requirements can lead to damage to property.
NOTE
Description of a situation that can lead to damage to property
The marking below draws your attention to important information about the
product or about handling the product.
Important
Important information

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2 Conditions on site
Series PW29 load cells are hermetically encapsulated and are therefore very
insensitive to moisture influence. The transducers attain protection class IP68
(test conditions: 100 hours under 1m water column) and IP69K (water at high
pressure, steam cleaner), as per DIN EN60529. Nevertheless, the load cells
must be protected against permanent moisture influence.
2.1 Corrosion protection
The load cell must be protected against chemicals that could attack the trans-
ducer body steel or the cable.
NOTE
Acids and all substances that release ions also attack stainless steels and
their welded seams.
The resultant corrosion can cause the transducer to fail. If this is the case, you
must provide appropriate means of protection.
2.2 Deposits
Dust, dirt and other foreign matter must not be allowed to accumulate suffi-
ciently to divert some of the measuring force onto the housing, thus invalidat-
ing the measured value (force shunt).

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3 Mechanical installation
3.1 Important precautions during installation
wHandle the transducer with care.
wWelding 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.
wMake 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.
NOTE
Load cells are precision measuring elements, and need to be handled care-
fully. If they are dropped or knocked, the transducer may be permanently
damaged. Make sure that the transducer cannot be overloaded while it is
being mounted, either.
3.2 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 torque*)
100 0 250kg M8 10.9 35NVm
500 0 1000kg M12 10.9 110NVm
*) Recommended value for the specified property class. Please also comply with the screw manufacturer's
instructions with regard to screw dimensions.

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Set the overload stop during
installation and cement with screw
locking adhesive
Connection
cable
Direction of loading center of platform
Load application
MountingSpacing disc
Spacing disc
Fig.3.1: Load application and installation
Important
Load must not be applied to the side where the cable connection is located,
as this would cause a force shunt through the cable.
Setting the overload stop:
Type PW29 load cells are fitted with an adjustable overload stop. Set this
overload stop before starting up the load cell.
To do this, load the installed load cell with approx. 120% of the service load, at
the maximum eccentricity for the particular application. The maximum per-
missible loadings stated in the specifications must not be exceeded. Note in
particular the “Limit load at max. 100mm eccentricity” specification, and take
into consideration the moment produced by the eccentricity in your individual
application. Then adjust the screw of the overload stop and fix it in position
with a screw locking adhesive, such as Loctite.

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4 Electrical connection
The following can be connected for measurement signal conditioning:
wCarrier‐frequency amplifier
wDC amplifier
designed for strain gage measurement systems.
In the standard version, the transducers come supplied with a 3m cable with
a 6‐pin Pancon plug in a six‐wire configuration.
4.1 Connection with a six‐wire configuration
4
Plug‐in contact 1 (white) = measurement signal (+)
Plug‐in contact 3 (black) = excitation voltage (-)
Plug‐in contact 6 (gray) = sense lead (-)
Plug‐in contact 4 (blue) = excitation voltage (+)
Plug‐in contact 5 (green) = sense lead (+)
Plug‐in contact 2 (red) = measurement signal (-)
Schematic diagram of a Pancon plug (CE100F26‐6), 6‐pin
1
23
56
blue marking
Shield (yellow) = cable shield
connected to load cell body
Fig. 4.1: Connection with a 6‐wire cable (choice of 3m or 6m lengths)
With this cable assignment, the output voltage at the amplifier is positive when
the transducer is loaded (see Fig.3.1).
4.2 Connection with a four‐wire configuration
When transducers with a six‐wire configuration are connected to amplifiers
with a four‐wire configuration, the sense leads of the transducer must be con-
nected to the corresponding excitation voltage leads: (+) with (+) marking and
(-) with (-) marking, see Fig. 4.1. This measure also reduces the cable resist-
ance of the excitation voltage leads. However, there will be a voltage loss on
the supply leads due to the cable resistance that is still present and not com-
pensated for by the six‐wire configuration. A large part of this loss can be
eliminated by a calibration, however, the temperature‐dependent part remains.
The TKc value given in the specifications for the transducer therefore does not
apply for the cable and transducer combination when connection is with a
four‐wire configuration; the cable percentage must be added.

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4.3 Shortening the cable
If the transducer is connected to an amplifier with a six‐wire configuration, the
transducer cable can be shortened as required, without adversely affecting
the measurement accuracy.
4.4 Extension cable
Only use shielded, low‐capacitance measurement cables for extension. En-
sure that connection is perfect, with a low contact resistance.
The cable of a six‐wire transducer can be extended with a cable of the same
type.
4.5 Parallel connection (option)
Only load cells with an aligned output (nominal (rated) sensitivity and output
resistance) are suitable for parallel connection. Type PW29 load cells are
available with this option.
4.6 Cable protection
The transducers attain protection class IP68 as per DIN EN60529 and IP69K,
based on DIN40050 Part9 specifications. In applications where the PVC
cable of the load cell can be chemically or mechanically attacked or des-
troyed, extra cable protection must be provided by means of standard cable
protection systems. The load cell is fitted with an adapter with an M12
internal thread, for attaching the screwed cable gland of the flexible cable pro-
tection tubing. Fit the cable protection system as shown in Fig. 4.2.

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Cable protection system*, comprising:
* Supplier such as Flexicon
(e‐mail: info@icp‐solutions.de)
- Screwed cable gland*
- Flexible cable protection tubing*
O‐ring (provided by customer)
Unscrew the M12 sleeve and replace
with an M12 threaded tube coupling
Fig. 4.2: Cable protection (implemented by the customer)
4.7 EMC protection
Important
Load cells with shielded, round cables are EMC‐tested in accordance with EC
directives and are identified by CE certification. However, you must connect
the shield of the connection cable on the shielding electronics enclosure, in
order to achieve EMC protection for the measuring chain.
Electrical and magnetic fields often induce interference voltages in the meas-
uring circuit. Therefore:
wUse shielded, low‐capacitance measurement cables only (HBM cables
fulfill both conditions).
wDo not route the measurement cables parallel to power lines and control
circuits. If this is not possible, protect the measurement cable with e.g. steel
conduit.
wAvoid stray fields from transformers, motors and contact switches.
wDo not ground the transducer, amplifier and indicator more than once.
wConnect all devices in the measuring chain to the same protective earth
conductor.

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5 Specifications
Type PW29...
Accuracy class 1) C3MR
Number of load cell verification inter-
vals nLC 3000
Maximum capacity Emax kg 100 250 500 750 1000
Minimum load cell verification inter-
val vmin g 10 20 50 50
100
Temperature coefficient of the zero
signal per 10K TK0% of
Cn
"0.0140
"0.0112
"0.0140 "0.0093 "0.0140
Maximum platform size mm 800 x 800
Nominal (rated) sensitivity
CnmV/
V
2.0 "10%
(aligned output, suitable for parallel
connection: 2.0 "0.1%)
Zero signal error "0.1
Temperature coefficient of the sensi-
tivity per 10K 2) in the temp. range
+20 to +40 5C
-10 to +20 5C
TKC
% of
Cn
"0.0175
"0.0117
Non‐linearity 2) dlin "0.0166
Relative reversibility error 2) dhy "0.0166
Minimum dead load output return MDLOR "0.0166
Off‐center load error 3) ppm v233
Input resistance RLC
0
380 "15
Output resistance
R0
350 "10
(aligned output, suitable for parallel
connection: 359 "0.2)
Reference excitation voltage Uref
V
5
Nominal (rated) range of the excita-
tion voltage BU1 to 12
Maximum excitation voltage 15
Insulation resistance at 100 VDC Ris G0> 2
Nominal (rated) temperature range BT
5C
-10 to +40
Operating temperature range Btu -10 to +50
Storage temperature range Btl -25 to +70
Limit load at max. 100mm eccentricity EL% of
Emax
150
Limit lateral loading, static Elq 300
Breaking load Ed300
Nominal (rated) displacement 4) snom
mm
< 0.2 < 0.2 < 0.25 < 0.25 < 0.3
Displacement at 1/3@Emax and
283mm eccentricity sexz < 0.1 < 0.15 < 0.2 < 0.25 < 0.3
Weight, approx. Gkg 6.3
1) As per OIML R60, with PLC = 0.7.
2) The values for non‐linearity (dlin), relative reversibility error (dhy) and temperature coefficient of sensitivity (TKC) are recommended
values. The sum of these values is within the cumulated error limit according to OIML R60.
3) As per OIML R76.
4) Loading with Emax and center of gravity in center of load cell.

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Specifications, continued
Degree of protection per DIN
EN60529 (IEC529) IP68 (test conditions 1m water column / 100h);
IP69K (water at high pressure, steam cleaner) 5)
Cable length (standard) m 3
Material:
measuring body
cable entry
cable sheath
cover
steel 1.4545 6)
steel 1.4545 6)
PVC
steel 1.6908
5) Based on DIN 40050, Part 9 specifications, for road vehicles.
6) As per EN 10088‐1.

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6 Dimensions
Connection cable
(see section 4.6)
76 60
825 125 25
16
22
75
12
191
31
12
16
22
31
9.5
17.5
j14
Cable protection
system possible
(see section 4.6)
Dimensions (in mm; 1 mm = 0.03937 inches)
Set the overload stop during
installation and cement with screw
locking adhesive
8 x M8 (M12*))
*) M12 for maximum capacities 500kg to 1000kg

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Inhalt Seite
Deutsch
Sicherheitshinweise 18.............................................
1 Verwendete Kennzeichnungen 22................................
1.1 Auf der Wägezelle angebrachte Symbole 22...................
1.2 In dieser Anleitung verwendete Kennzeichnungen 22............
2 Bedingungen am Einbauort 23...................................
2.1 Korrosionsschutz 23........................................
2.2 Ablagerungen 23...........................................
3 Mechanischer Einbau 24........................................
3.1 Wichtige Vorkehrungen beim Einbau 24.......................
3.2 Montage 24................................................
4 Elektrischer Anschluss 26.......................................
4.1 Anschluss in Sechsleiter‐Technik 26..........................
4.2 Anschluss in Vierleiter‐Technik 26............................
4.3 Kabelkürzung 27...........................................
4.4 Kabelverlängerung 27.......................................
4.5 Parallelschaltung (Option) 27.................................
4.6 Kabelschutz 27.............................................
4.7 EMV‐Schutz 28............................................
5 Technische Daten 29............................................
6 Abmessungen 30...............................................

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Sicherheitshinweise
Bestimmungsgemäße Verwendung
Die Wägezellen der Typenreihe PW290 sind für wägetechnische Anwendun-
gen im Rahmen der durch die technischen Daten spezifizierten Belastungs-
grenzen konzipiert. Jeder andere Gebrauch ist nicht bestimmungsgemäß.
Die Wägezellen dürfen nur von qualifiziertem Personal ausschließlich ent-
sprechend der technischen Daten unter Beachtung der Sicherheitsbestim-
mungen und Vorschriften dieser Montageanleitung eingesetzt werden. Zusätz-
lich sind die für den jeweiligen Anwendungsfall geltenden Rechts‐ und
Sicherheitsvorschriften zu beachten. Sinngemäß gilt dies auch bei Verwen-
dung von Zubehör.
Die Wägezellen sind nicht zum Einsatz als Sicherheitsbauteile bestimmt. Bitte
beachten Sie hierzu den Abschnitt „Zusätzliche Sicherheitsvorkehrungen“.
Der einwandfreie und sichere Betrieb der Wägezellen setzt sachgemäßen
Transport, fachgerechte Lagerung, Aufstellung und Montage sowie sorgfältige
Bedienung voraus.
Belastbarkeitsgrenzen
Beim Einsatz der Wägezellen sind die Angaben in den technischen Datenblät-
tern unbedingt zu beachten. Insbesondere dürfen die jeweils angegebenen
Maximalbelastungen keinesfalls überschritten werden. Nicht überschritten
werden dürfen z.B. die in den technischen Datenblättern angegebenen Werte
für
wGrenzlast
wGrenzlast bei max. Exzentrizität
wGrenzquerbelastung
wBruchlasten
wTemperaturgrenzen
wGrenzen der elektrischen Belastbarkeit
Beachten Sie, dass beim Einbau mehrerer Wägezellen in eine Waage die
Lastverteilung auf die einzelnen Wägezellen nicht immer gleichmäßig ist.
Einsatz als Maschinenelemente
Die Wägezellen können als Maschinenelemente eingesetzt werden. Bei
dieser Verwendung ist zu beachten, dass die Wägezellen zu Gunsten einer
hohen Messempfindlichkeit nicht mit den im Maschinenbau üblichen
Sicherheitsfaktoren konstruiert wurden. Beachten Sie hierzu den Abschnitt
„Belastbarkeitsgrenzen“ und die technischen Daten.

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Unfallverhütung
Obwohl die angegebene Nennlast im Zerstörungsbereich ein Mehrfaches vom
Messbereichsendwert beträgt, müssen die einschlägigen Unfallverhütungs-
vorschriften der Berufsgenossenschaften berücksichtigt werden.
Zusätzliche Sicherheitsvorkehrungen
Die Wägezellen können (als passive Aufnehmer) keine (sicherheitsrele-
vanten) Abschaltungen vornehmen. Dafür bedarf es weiterer Komponenten
und konstruktiver Vorkehrungen, für die der Errichter und Betreiber der Anlage
Sorge zu tragen hat.
Wo bei Bruch oder Fehlfunktion der Wägezellen Menschen oder Sachen zu
Schaden kommen können, müssen vom Anwender geeignete zusätzliche
Sicherheitsvorkehrungen getroffen werden, die zumindest den Anforderungen
der einschlägigen Unfallverhütungsvorschriften genügen (z.B. automatische
Notabschaltungen, Überlastsicherungen, Fanglaschen oder ‐ketten oder
andere Absturzsicherungen).
Die das Messsignal verarbeitende Elektronik ist so zu gestalten, dass bei
Ausfall des Messsignals keine Folgeschäden auftreten können.
Option Explosionsschutzausführung
Bei Wägezellen, die mit dieser Option ausgeliefert werden und in explosions-
gefährdeten Bereichen eingesetzt werden sollen, gilt zusätzlich:
wBei der Installation sind die einschlägigen Errichtungsbestimmungen zu
beachten.
wDas Anschlusskabel der Plattformwägezellen in Explosionsschutzausfüh-
rung hat freie Enden (Kabeladerbelegung siehe Abschnitt 4.1).
wDie Installationsbedingungen, die in der Konformitätsbescheinigung und/
oder Baumusterprüfbescheinigung aufgeführt sind, müssen eingehalten
werden.
Allgemeine Gefahren bei Nichtbeachten der Sicherheitshinweise
Die Wägezellen entsprechen dem Stand der Technik und sind betriebssicher.
Von den Aufnehmern können Gefahren ausgehen, wenn sie von unge-
schultem Personal oder unsachgemäß montiert, aufgestellt, eingesetzt und
bedient werden. Jede Person, die mit Aufstellung, Inbetriebnahme, Betrieb
oder Reparatur einer Wägezelle beauftragt ist, muss die Montageanleitung
und insbesondere die sicherheitstechnischen Hinweise gelesen und
verstanden haben. Bei nicht bestimmungsgemäßem Gebrauch der Wäge-
zellen, bei Nichtbeachtung der Montage‐ und Bedienungsanleitung, dieser
Sicherheitshinweise oder sonstiger einschlägiger Sicherheitsvorschriften
(Unfallverhütungsvorschriften der BG) beim Umgang mit den Wägezellen,
können die Wägezellen beschädigt oder zerstört werden. Insbesondere bei

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Überlastungen kann es zum Bruch von Wägezellen kommen. Durch den
Bruch einer Wägezelle können darüber hinaus Sachen oder Personen in der
Umgebung der Wägezelle zu Schaden kommen.
Werden Wägezellen nicht ihrer Bestimmung gemäß eingesetzt oder werden
die Sicherheitshinweise oder die Vorgaben der Montage‐ oder Bedienungs-
anleitung außer Acht gelassen, kann es ferner zum Ausfall oder zu Fehl-
funktionen der Wägezellen kommen, mit der Folge, dass (durch auf die Wä-
gezellen einwirkende oder durch diese überwachte Lasten) Menschen oder
Sachen zu Schaden kommen können.
Der Leistungs‐ und Lieferumfang des Aufnehmers deckt nur einen Teilbereich
der Wägetechnik ab, da Messungen mit (resistiven) DMS‐Sensoren eine
elektronische Signalverarbeitung voraussetzen. Sicherheitstechnische
Belange der Wägetechnik sind zusätzlich vom Anlagenplaner/Ausrüster/
Betreiber so zu planen, zu realisieren und zu verantworten, dass Rest-
gefahren minimiert werden. Die jeweils existierenden nationalen und örtlichen
Vorschriften sind zu beachten.
Umbauten und Veränderungen
Der Aufnehmer darf ohne unsere ausdrückliche Zustimmung weder kon-
struktiv noch sicherheitstechnisch verändert werden. Jede Veränderung
schließt eine Haftung unsererseits für daraus resultierende Schäden aus.
Wartung
Die Wägezellen PW290 sind wartungsfrei.
Veräußerung
Bei einer Veräußerung der Wägezelle ist diese Montageanleitung der Wäge-
zelle beizulegen.
Umweltschutz, Entsorgung
Nicht mehr gebrauchsfähige Aufnehmer sind gemäß den nationalen und örtli-
chen Vorschriften für Umweltschutz und Rohstoffrückgewinnung getrennt von
regulärem Hausmüll zu entsorgen.
Falls Sie weitere Informationen zur Entsorgung benötigen, wenden Sie sich
bitte an die örtlichen Behörden oder an den Händler, bei dem Sie das Produkt
erworben haben.
Qualifiziertes Personal
Qualifiziertes Personal sind Personen, die mit Aufstellung, Montage, Inbe-
triebsetzung und Betrieb des Produktes vertraut sind und die über die ihrer
Tätigkeit entsprechende Qualifikationen verfügen.