HBM RTN/M2 Series User manual
RTN/M2LBR / RTN/M2LB
RTN/M2LAR / RTN/M2LA
A1867-2.0 en/de/fr/es
Weighing modules
Wägemodule
Modules de pesage
Módulos de pesaje
RTN/M2...
Mounting Instructions
Montageanleitung
Notice de montage
Instrucciones de montaje
English Page 3 - 24.................................................
Deutsch Seite 25 - 46...............................................
Français Page 47 - 68...............................................
Español Página 69 - 89.............................................
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RTN/M2
A1867-2.0 en/de/fr/es HBM
Contents Page
English
Safety Notes 4....................................................
1 General 7.....................................................
2 Mounting preparation 9........................................
3 Mounting 12....................................................
4 Dimensions (in mm; 1mm = 0.03937 inches) 15....................
5 Specifications of the RTN/M2L... weighing modules 21.............
RTN/M2
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Safety Notes
In cases where a breakage would cause injury to persons or damage to
equipment, the user must take appropriate safety measures (such as fall
protection, overload protection, etc.).
It is essential to comply with the relevant accident prevention regulations. In
particular you should take into account the limit loads quoted in the specifica-
tions.
Use in accordance with the regulations
The weighing modules have beend designed for weighing applications. Use
for any additional purpose shall be deemed to be not in accordance with the
regulations.
In the interests of safety, the weighing modules should only be operated as
described in the Mounting Instructions. It is also essential to observe the
appropriate legal and safety regulations for the application concerned during
use. The same applies to the use of accessories.
The weighing modules are not safety elements within the meaning of its use
as intended. Proper and safe operation of this weighing module requires
proper transportation, correct storage, assembly and mounting and careful
operation and maintenance.
General dangers due to non‐observance of the safety instructions
The weighing modules correspond to the state of the art and are fail‐safe. The
weighing modules can give rise to residual dangers if they are inappropriately
installed and operated by untrained personnel.
Everyone involved with the installation, commissioning, maintenance or repair
of a weighing module must have read and understood the Mounting
Instructions and in particular the technical safety instructions.
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RTN/M2
A1867-2.0 en/de/fr/es HBM
Residual dangers
The scope of supply and performance of the weighing modules covers only a
small area of weighing technology. In addition, equipment planners, installers
and operators should plan, implement and respond to the safety engineering
considerations of weighing technology in such a way as to minimise residual
dangers. Prevailing regulations must be complied with at all times. There must
be reference to the residual dangers connected with weighing technology.
In these mounting instructions residual dangers are pointed out using the
following symbols:
Symbol: CAUTION
Meaning: Possibly dangerous situation
Warns of a potentially dangerous situation in which failure to comply with
safety requirements could lead to damage to property and physical injury.
Symbol: NOTE
Refers to the fact that important information is being given about the product
or its use.
Symbol:
Meaning: CE mark
The CE mark signals a guarantee by the manufacturer that his product meets
the requirements of the relevant EC directives.
RTN/M2
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Environmental conditions
CAUTION
In the context of your application, please note that all materials which release
chlorine ions will attack all grades of stainless steel and their welding seams.
In such cases the operator must take appropriate safety measures.
With environmental conditions that cannot be clearly defined, HBM recom-
mends to provide the load cells and weighing modules with a protective
coating which matches these conditions (after mounting) in order to prevent
the influence of aggressive media. Please take into account the resistance of
the cable material and the mounting parts.
Prohibition of own conversions and modifications
The weighing modules 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.
Qualified personnel
These weighing modules are only to be installed by qualified personnel strictly
in accordance with the specifications and with the safety rules and regulations
which follow. It is also essential to observe the appropriate legal and safety
regulations for the application concerned. The same applies to the use of
accessories.
Qualified personnel means persons entrusted with the installation, fitting,
commissioning and operation of the product who possess the appropriate
qualifications for their function.
Accident prevention
Although the specified brealing load is several times the full scale value, the
relevant accident prevention regulations from the trade associations must be
taken into consideration.
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1 General
HBM offers the RTN/M2(L)... weighing module for RTN load cells with max.
capacities of 1 t ... 33 t. The ”L” in the type designation signifies that the mod-
ule has been fitted with a stay rod. “A” signifies rubber‐metal bearing, “B”
stands for pendulum bearing.
Product types RTN/M2LA...
Order number Max. capacity
for load cell Material Version
1-RTN/M2LAR2.2T 1 t ... 2.2 t stainless steel WITH stay rod
1-RTN/M2AR2.2T WITHOUT stay rod
1-RTN/M2LAR4.7T 4.7 t stainless steel WITH stay rod
1-RTN/M2AR4.7T WITHOUT stay rod
1-RTN/M2LAR22T 10 t ... 22 t stainless steel WITH stay rod
1-RTN/M2AR22T WITHOUT stay rod
1-RTN/M2LA33T 33 t galvanized WITH stay rod
1-RTN/M2A33T WITHOUT stay rod
Product types RTN/M2LB...
Order number Max. capacity
for load cell Material Version
1-RTN/M2LBR4.7T/2 1 t ... 4.7 t stainless steel WITH stay rod
1-RTN/M2BR4.7T/2 WITHOUT stay rod
1-RTN/M2LBR22T 10 t ... 22 t stainless steel WITH stay rod
1-RTN/M2BR22T WITHOUT stay rod
1-RTN/M2LB33T 33 t galvanized WITH stay rod
1-RTN/M2B33T WITHOUT stay rod
RTN/M2
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The weighing modules have been primarily designed for use in tank weighing.
As a rule, the weighing modules are equipped with adjustable limit stops that
limit horizontal movements, for example by wind forces or in mixer operation.
In addition, the modules are provided with a anti‐liftoff device which prevents
the tank from lifting off. However, ensure that the specified data (see chapter
5) are not exceeded.
The modules comprise a lower module plate for mounting on the basic
construction (foundations), a load cell dummy with load introduction elements
and the upper module plate for tank mounting. For load introduction into the
load cell, a rubber‐metal bearing (with RTN/M2LA) or a pendulum bearing
(with RTN/M2LB) is used which allows for horizontal shifting of the load ap-
plied. The weighing modules are completely fitted with a load cell dummy that
can be loaded, with a ground cable, and a securing device for transport.
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RTN/M2
A1867-2.0 en/de/fr/es HBM
2 Mounting preparation
Caution:
The weighing modules are delivered completely assembled , however,
without a load cell. Instead of the load cell, a dummy has been assembled
into the weighing module, which is capable of taking up the specified loads.
Before the weighing module is mounted underneath the tank, vessel or silo,
check whether dummy replacement through the load cell will still be possible
even if the tank is placed on the weighing module. In order to effect the re-
placement, a suitable lifting device is necessary that is capable of lifting the
tank by at least 10 mm. Pipe connections mounted on the tank or the feed‐in
or discharge systems have to be vertically movable or separable.
NOTE
If this is not the case, the dummy must be replaced by an appropriate
RTN load cell already before the weighing module is mounted.
General mounting preparations
Ensure that the assembly/siting areas provided are clean, level and hori-
zontally aligned. Any askew positions can be compensated for, depending
on the assembly situation, for example by appropriate wedges and com-
pensation plates (weld in position) or by grinding down the assembly area.
However, module plates must not be ground down under any circum-
stances.
The foundations / basic construction and the connection of the
superstructure must be sufficiently rigid in order to avoid deformations (e.g.
deflections) under load.
In order to provide for fitting and assembly free from any constraining
forces, the mounting bores on the basic construction and the tank connec-
tion must be sufficiently aligned.
An even loading on the bearing points is to be sought. To this end, in par-
ticular for statically indefinite bearings, ensure that the height level setting
at the bearing points is correct (provide spacer plates, 5 x 1 mm included
in scope of delivery).
Undo transport protection device and stops, fit height adjustment plates
(dependent on maximum capacity, see Dimensions).
RTN/M2
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A1867-2.0 en/de/fr/esHBM
How to use the enclosed grease tube
NOTE
Before fitting the load cell, the enclosed grease must be applied to the
upper thrust piece and to the underside of the pendulum bearing (with
RTN...B) in order to minimize friction between the inside surface of the
thrust piece and the load introduction element of the RTN load cell or
pendulum bearing.
Use of the spacer plates provided
The scope of delivery of the module includes 2 x 5 spacer plates. They are
used for the vertical adjustment of the module. Five plates max. are to be
fitted underneath the upper module plate, and five plates max. between the
base and the cross bracket of the anti‐liftoff device
Ensure that all screws are fitted with U‐washers.
5 plates max. for
height adjustment
5 plates max. for height adjustment
Upper module plate
Centering disc (only up
to 4.7 t max. capacity)
Lateral stops
Cross‐bracket
(Anti‐liftoff device)
Air gap: 1 mm
Mounting base (only up
to 4.7 t max. capacity)
Bearing
Dummy
Fig. 7.1: Fitting of the spacer plates with 4.7 t version
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