HBM PW37P User manual
Mounting Instructions | Montageanleitung |
Notice de montage
English Deutsch Français
PW37P
Hottinger Baldwin Messtechnik GmbH
Im Tiefen See 45
D-64239 Darmstadt
Tel. +49 6151 803-0
Fax +49 6151 803-9100
www.hbm.com
Mat.: 7-0201.0001-1
DVS: A04856_03_Y00_00 HBM: public
04.2019
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 durabilité.
Mounting Instructions | Montageanleitung |
Notice de montage
English Deutsch Français
PW37P
2A04856_03_Y00_00 HBM: public PW37P
English
1 Safety instructions 3........................................
2 Markings used 7............................................
2.1 The markings used in this document 7..........................
2.2 Symbols on the load cell 7....................................
3 Conditions at the mounting location 8.......................
3.1 Protection against corrosion 8.................................
3.2 Cleaning 8..................................................
3.3 Deposits 8..................................................
4 Mechanical installation 9....................................
4.1 Important precautions during installation 9......................
4.2 Mounting 9..................................................
5 Electrical connection 11......................................
5.1 Connection in a 6-wire configuration 11..........................
5.2 Connection in a 4-wire configuration 11..........................
5.3 Shortening the cable 12.......................................
5.4 Extension cables 12...........................................
5.5 Parallel connection 12.........................................
5.6 EMC protection 13............................................
6 Dimensions 14..............................................
7 Accessories 15..............................................
8 Specifications 16............................................
Safety instructions
PW37P A04856_03_Y00_00 HBM: public 3
1 Safety instructions
Intended use
Load cells of the PW37…type series are designed for technical weighing
applications within the load limits detailed in the specifications. Any other use is
not the intended use.
The load cells may only be installed by qualified personnel in compliance with
the specifications and with the safety requirements and regulations of these
mounting instructions. 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 "Additional safety precautions" section. Proper and safe operation of the
load cells requires proper transportation, correct storage, siting and mounting,
and careful operation.
Load carrying capacity limits
Comply with the data in the technical data sheets when using the load cells.
The respective specified maximum loads in particular must never be exceeded.
Do not exceed the values stated in the technical data sheets, forexample
SLimit load
SLimit load at max. eccentricity
SLimit lateral loading
SBreaking loads
STemperature limits
SLimits of electrical load-carrying capacity
Note that when several load cells are installed in a scale, there is not always an
even load distribution on the individual load cells.
Safety instructions
4A04856_03_Y00_00 HBM: public PW37P
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 to the
"Load-carrying capacities" section and to the specifications.
Accident prevention
The applicable accident prevention regulations must be taken into account,
even though the maximum capacity in the destructive range is well in excess of
the full scale value.
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 electronics conditioning the measurement signal should be designed so
that measurement signal failure cannot subsequently cause damage.
General dangers of failing to follow the safety instructions
Load cells 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. 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 manual, these safety instructions or any other
applicable safety regulations (safety and accident prevention regulations of the
Employers' Liability Insurance Association) when using the load cells. Load
cells can break, particularly in the case of overloading. The breakage of a load
Safety instructions
PW37P A04856_03_Y00_00 HBM: public 5
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 manual 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 gage
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. Comply with pertinent national
and local regulations.
Conversions and modifications
The design or safety engineering of the transducer must not be modified with
out our express permission. Any modification shall exclude all liability on our
part for any damage resulting therefrom.
Maintenance
The PW37…load cells are maintenance free.
Resale
If the load cell is resold, these mounting instructions must be included with the
load cell.
Safety instructions
6A04856_03_Y00_00 HBM: public PW37P
Environmental protection, disposal
In accordance with national and local environmental protection, 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 disposal, please contact your local
authorities or the dealer from whom you purchased the product.
Qualified personnel
Qualified personnel means persons entrusted with installing, 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 requirements:
1. Knowledge of the safety concepts of automation technology is a require
ment and as project personnel, you must be familiar with these concepts.
2. 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.
3. As commissioning engineers or service engineers, you have successfully
completed the training to repair the automation systems. You are also
authorized to operate, ground and mark circuits and equipment in
accordance with safety engineering standards.
Markings used
PW37P A04856_03_Y00_00 HBM: public 7
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 Meaning
WARNING This marking warns of a potentially dangerous situa
tion in which failure to comply with safety require
ments may result in death or serious physical injury.
Notice This marking draws your attention to a situation in
which failure to comply with safety requirements may
result in 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 tips for use 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 Symbols on the load cell
CE mark
The CE mark enables the manufacturer to guarantee that the
product complies with the requirements of the relevant EC
directives (the Declaration of Conformity can be found on the
HBM website (www.hbm.com) under HBMdoc).
Conditions at the mounting location
8A04856_03_Y00_00 HBM: public PW37P
3 Conditions at the mounting location
Series PW37 load cells are hermetically encapsulated and are therefore very
insensitive to the effects of moisture and humidity. The transducers achieve
protection class IP68 (test conditions: 100 hours under 1m water column) and
IP69K (water at high pressure, steam cleaning), as per DIN EN60529.
Nevertheless, the load cells should be protected against constant humidity and
moisture.
3.1 Protection against corrosion
The load cells must be protected against chemicals that could attack the
transducer body steel or the cable.
Notice
Acids and all substances that release ions also attack stainless steels and their
weld seams.
The resultant corrosion can cause the transducer to fail. If this is the case, you
must provide appropriate means of protection.
3.2 Cleaning
The load cell has been designed according to the EHEDG design guidelines to
allow for easy, mild cleaning. When mounting the load cell, make certain it can
be reached from all sides for cleaning. Cleaning can be performed without
dismounting the load cell and should be done regularly. The surface of the load
cell must not be damaged with sharp-edged brushes during cleaning.
3.3 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
distorting the measured value (force shunt).
Mechanical installation
PW37P A04856_03_Y00_00 HBM: public 9
4 Mechanical installation
4.1 Important precautions during installation
SHandle the transducer with care.
SWelding currents must not be allowed to flow through 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 provides the highly
flexible EEK ground cable for this purpose, for example. It 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 the 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, including 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 scope of supply includes 2 seals for sealing the gap surfaces against
Mechanical installation
10 A04856_03_Y00_00 HBM: public PW37P
microbiological contamination. The screws and tightening torques to be used
are given in the table below:
Version Thread Max. thread
reach
Min. property
class
Tightening
torque1)
Standard M6/M8 (200 kg) 12 mm 10.9 14 N⋅m/25 N⋅m
Rustless M6/M8 (200 kg) 12 mm A2-80 or A4-80 14 N⋅m/25 N⋅m
1) Recommendedvalue for the specified property class. Please comply with the screw
manufacturer's instructions with regard to screw dimensions.
Dimensions in mm
Platform center
Load application
Run the cable
in a straight
line from the
connector
Mounting holes
Mounting base
Seal (in
scope of
supply)
Mounting
holes
Seal (in scope of supply)
Mount plug with
tightening torque of
4 Nm
min. 6 *
min. 6 *
min. 6 *
Mounting plates, connect
ing parts and screw con
nections have to be con
structed by the customer
in accordance with the
EHEDG design guidelines.
Product contact area
* According to the EHEDG design guidelines a minimum
distance of 6 mm is recommended for easy cleanability.
min. 6 *
Fig. 4.1 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.
The intermediate plates should be flush against the load cell on all sides (see
connection dimensions in section 6 „Dimensions“, page 14).
Electrical connection
PW37P A04856_03_Y00_00 HBM: public 11
5 Electrical connection
The following can be connected for measurement signal conditioning:
SCarrier-frequency amplifiers
SDC voltage amplifiers
designed for strain gage measurement systems.
5.1 Connection in a 6-wire configuration
Plug-in contact 1 = measurement signal (+)
Plug-in contact 6 = excitation voltage (-)
Plug-in contact 5 = sense lead (-)
Plug-in contact 7 = excitation voltage (+)
Plug-in contact 3 = sense lead (+)
Plug-in contact 8 = measurement signal (-)
2
3
4
5
6
7
1
8
Plug-in contact 2 = not in use
Plug-in contact 4 = not in use
Fig. 5.1 Connector pin assignment
With this connector pin assignment, the output voltage on the measuring
amplifier is positive when the transducer is loaded (see Fig. 4.1). The pin
assignment for the cables available as accessories can be found in section 7
on page 15.
5.2 Connection in a 4-wire configuration
When transducers in a 6-wire configuration are connected to amplifiers in a
4-wire configuration, the sense leads of the transducers must be connected to
the corresponding excitation voltage leads: marking (+) with (+) and marking (-)
with (-), see Fig. 5.1. This measure also reduces the cable resistance of the
Electrical connection
12 A04856_03_Y00_00 HBM: public PW37P
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 compensated for
by the 6-wire configuration. A large part of this loss can be eliminated by a
calibration, however, the temperature-dependent part remains.
Important
The TCsvalue given for the transducer in the specifications therefore does not
apply for the cable and transducer combination when connection is in a 4-wire
configuration, where the cable percentage must be added.
5.3 Shortening the cable
If the transducer is connected to an amplifier with a 6-wire configuration, the
transducer cable can be shortened as required without adversely affecting the
measurement accuracy.
5.4 Extension cables
Only use shielded, low-capacitance measurement cables for extension. Ensure
that the connection is perfect, with a low contact resistance.
The cable of a 6-wire transducer can be extended with a cable of the same
type.
5.5 Parallel connection
Only load cells with an aligned output (nominal (rated) sensitivity and output
resistance) are suitable for parallel connection. This option is not available with
type PW37 load cells.
Electrical connection
PW37P A04856_03_Y00_00 HBM: public 13
5.6 EMC protection
Important
The load cells with shielded, round cables are EMC-tested in accordance with
EC directives and identified by CE certification. However, you must connect the
shield of the connection cable to the shielding electronics enclosure in order to
achieve EMC protection for the measuring chain.
Electrical and magnetic fields often induce interference voltages in the
measuring circuit. Therefore:
SUse shielded, low-capacitance measurement cables only (HBM cables fulfill
both conditions).
SDo not route the measurement cables parallel to power lines and control
circuits. If this is not possible, protect the measurement cable witha steel
conduit, for example.
SAvoid stray fields from transformers, motors and contact switches.
SDo not ground the transducer, amplifier and indicator more than once.
SConnect all the devices in the measuring chain to the same protective
conductor.
To ensure the best EMC protection, the load cell, together with the connection
cable and the subsequent electronics, should be placed in a shielded housing.
High-energy pulse-shaped disturbance variables while interference is active
may lead briefly to deviations up to ten times the specified tolerances, which
will disappear again when interference is no longer active.
Dimensions
14 A04856_03_Y00_00 HBM: public PW37P
6 Dimensions
Dimensions in mm
Connector plug
Maximum capacity 50 kg, 100 kg: M6
Maximum capacity 200 kg: M8
Accessories
PW37P A04856_03_Y00_00 HBM: public 15
7 Accessories
Connection cable
Connection cable with M12 F male connector, 8-pin,
stainless steel IP68/IP69K, hygiene design, 3 m long
1-KAB175-3-1
Connection cable with M12 F male connector, 8-pin,
stainless steel IP68/IP69K, hygiene design, 6 m long
1-KAB175-6-1
Connection cable with M12 F male connector, 8-pin,
stainless steel IP68/IP69K, hygiene design, 12 m long
1-KAB175-12-1
For connection cable specifications, see separate data sheet B3643.
Pin assignment 1-KAB175
Color code Connection
White Measurement signal (+)
Red Measurement signal (-)
Blue Excitation voltage (+)
Black Excitation voltage (-)
Green Sense lead (+)
Gray Sense lead (-)
Spare part
1 set of replacement seals, consisting of 2 seals (EPDM), order
no. E-9278.0014
Mounting Instructions | Montageanleitung |
Notice de montage
English Deutsch Français
PW37P
2A04856_03_Y00_00 HBM: public PW37P
Deutsch
1 Sicherheitshinweise 3......................................
2 Verwendete Kennzeichnungen 7.............................
2.1 In dieser Anleitung verwendete Kennzeichnungen 7..............
2.2 Auf der Wägezelle angebrachte Symbole 7......................
3 Bedingungen am Einbauort 8...............................
3.1 Korrosionsschutz 8..........................................
3.2 Reinigung 8.................................................
3.3 Ablagerungen 8.............................................
4 Mechanischer Einbau 9.....................................
4.1 Wichtige Vorkehrungen beim Einbau 9.........................
4.2 Montage 9..................................................
5 Elektrischer Anschluss 11....................................
5.1 Anschluss in Sechsleiter‐Technik 11.............................
5.2 Anschluss in Vierleiter‐Technik 11...............................
5.3 Kabelkürzung 12..............................................
5.4 Kabelverlängerung 12.........................................
5.5 Parallelschaltung 12...........................................
5.6 EMV‐Schutz 13...............................................
6 Abmessungen 14............................................
7 Zubehör 15..................................................
8 Technische Daten 16.........................................
Table of contents
Languages:
Other HBM Industrial Equipment manuals
