DE
EN
ES
FR
Model RLS-7000 Model RLS-8000
Operating instructions
Betriebsanleitung
Mode d‘emploi
Manual de instrucciones
OEM oat switch, miniature design
Models RLS-7000, RLS-8000
OEM-Schwimmerschalter, Miniaturausführung
Typen RLS-7000, RLS-8000
Détecteur de niveau à otteur OEM, version miniature
Types RLS-7000, RLS-8000
Interruptor de otador OEM, versión en miniatura
Modelos RLS-7000, RLS-8000
2
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WIKA operating instructions models RLS-7000, RLS-8000
DE
EN
ES
FR
Operating instructions
models RLS-7000, RLS-8000 Page 3 - 20
Betriebsanleitung
Typen RLS-7000, RLS-8000 Seite 21 - 38
Mode d‘emploi
types RLS-7000, RLS-8000 Page 39 - 56
Manual de instrucciones
modelos RLS-7000, RLS-8000 Página 57 - 74
© 03/2019 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA
®
is a registered trademark in various countries.
WIKA
®
ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!
Lire le mode d‘emploi avant de commencer toute opération !
A conserver pour une utilisation ultérieure !
¡Leer el manual de instrucciones antes de comenzar cualquier trabajo!
¡Guardar el manual para una eventual consulta!
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WIKA operating instructions models RLS-7000, RLS-8000
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Declarations of conformity can be found online at www.wika.com.
Contents
Contents
1. General information 4
2. Design and function 5
3. Safety 6
4. Transport, packaging and storage 11
5. Commissioning, operation 11
6. Faults 16
7. Maintenance and cleaning 18
8. Dismounting, return and disposal 19
9. Specications 20
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1. General information
■
The oat switches described in the operating instructions have
been designed and manufactured using state-of-the-art technology.
All components are subject to stringent quality and environmental
criteria during production. Our management systems are certied to
ISO 9001 and ISO 14001.
■
These operating instructions contain important information on
handling the instrument. Working safely requires that all safety
instructions and work instructions are observed.
■
Observe the relevant local accident prevention regulations and
general safety regulations for the instrument's range of use.
■
The operating instructions are part of the product and must be kept
in the immediate vicinity of the instrument and readily accessible to
skilled personnel at any time. Pass the operating instructions on to
the next operator or owner of the instrument.
■
Skilled personnel must have carefully read and understood the
operating instructions prior to beginning any work.
■
The general terms and conditions contained in the sales
documentation shall apply.
■
Subject to technical modications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: LM 50.11 (model RLS-7000)
LM 50.12 (model RLS-8000)
- Application consultant: Tel.: +49 9372 132-0
Fax: +49 9372 132-406
1. General information
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2. Design and function
2.1 Functional description
The model RLS-7000 works according to the oat principle with
magnetic transmission and is suitable for vertical installation. A reed
contact integrated in the guide tube is actuated through the magnetic
eld of a permanent magnet, when a preset switch point is reached. The
permanent magnet is located within a oat, which changes its position
with the level of the medium it is monitoring. The switching status of the
reed contact can be evaluated and processed by a connected control
device. The switching function can be changed between normally closed
and normally open by turning the oat through 180°.
The RLS-8000 is suitable for horizontal installation. The normally open
and normally closed switching function, as it is marked at the process
connection, can be set through a half turn on the mounting thread of the
switch.
180°
180°
2. Design and function
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2.2 Scope of delivery
■
Float switch
■
Operating instructions
Cross-check scope of delivery with delivery note.
3. Safety
3.1 Explanation of symbols
DANGER!
... indicates a directly dangerous situation resulting in serious
injury or death, if not avoided.
WARNING!
... indicates a potentially dangerous situation that can result
in serious injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result
in light injuries or damage to property or the environment, if
not avoided.
Information
... points out useful tips, recommendations and information
for ecient and trouble-free operation.
3.2 Intended use
Float switches are used exclusively for monitoring the levels of liquid
media. The scope of application is dened by the technical performance
limits and materials.
3. Safety
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■
The liquids must not have any large contamination or coarse particles
and must not have a tendency to crystallise. Ensure that the wetted
materials of the oat switch are suciently resistant to the medium
being monitored. Not suitable for dispersions, abrasive liquids, highly
viscous media and colours.
■
This instrument is not permitted to be used in hazardous areas!
■
The operating conditions specied in the operating instructions must
be observed.
■
Do not operate the instrument in the direct vicinity of ferromagnetic
environments (min. distance 100 mm).
■
Do not operate the instrument in the immediate vicinity of strong
electromagnetic elds or in the immediate vicinity of equipment that
can be aected by magnetic elds (min. clearance 1 m).
■
The oat switches must not be exposed to heavy mechanical strain
(impact, bending, vibration).
■
The technical specications contained in these operating instructions
must be observed. Improper handling or operation of the instrument
outside of its technical specications requires the instrument to be
taken out of service immediately and inspected by an authorised
WIKA service engineer.
The instrument has been designed and built solely for the intended use
described here, and may only be used accordingly.
The manufacturer shall not be liable for claims of any type based on
operation contrary to the intended use.
3. Safety
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DANGER!
Physical injuries
Work on containers involves the danger of intoxication and
suocation.
▶
No work is allowed to be carried out unless by taking
suitable personal protective measures (e.g. respiratory
protection apparatus, protective clothing etc.).
3.3 Improper use
Improper use is dened as any application that exceeds the technical
performance limits or is not compatible with the materials.
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous
situations and injuries.
▶
Refrain from unauthorised modifications to the instrument.
▶
Do not use the instrument within hazardous areas.
Any use beyond or dierent to the intended use is considered as
improper use.
Do not use this instrument in safety or emergency stop devices.
3.4 Responsibility of the operator
The instrument is used in the industrial sector. The operator is therefore
responsible for legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the
safety, accident prevention and environmental protection regulations for
the application area must be maintained.
3. Safety
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To ensure safe working on the instrument, the operating company must
ensure
■
that suitable rst-aid equipment is available and aid is provided
whenever required.
■
that the operating personnel are regularly instructed in all topics
regarding work safety, rst aid and environmental protection
and know the operating instructions and in particular, the safety
instructions contained therein.
■
that the instrument is suitable for the particular application in
accordance with its intended use.
■
that following testing, improper use of the instrument is excluded.
3.5 Personnel qualication
WARNING!
Risk of injury should qualication be insucient
Improper handling can result in considerable injury and
damage to equipment.
▶
The activities described in these operating instructions
may only be carried out by skilled personnel who have the
qualifications described below.
Skilled personnel
Skilled personnel, authorised by the operator, are understood to
be personnel who, based on their technical training, knowledge
of measurement and control technology and on their experience
and knowledge of country-specic regulations, current standards
and directives, are capable of carrying out the work described and
independently recognising potential hazards.
3. Safety
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3.6 Personal protective equipment
The personal protective equipment is designed to protect the skilled
personnel from hazards that could impair their safety or health during
work. When carrying out the various tasks on and with the instrument,
the skilled personnel must wear personal protective equipment.
Follow the instructions displayed in the work area regarding
personal protective equipment!
The requisite personal protective equipment must be provided by the
operating company.
3.7 Labelling, safety marks
Product label (example)
3. Safety
Model
P# product number
S# serial number
Electrical connection
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
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4. Transport, packaging and storage
4.1 Transport
Check the oat switch for any damage that may have been caused by
transport. Obvious damage must be reported immediately.
CAUTION!
Physical injuries and damage to equipment
With improper transport, a high level of damage to property
can occur.
▶
Observe the symbols on the packaging.
▶
Handle packed goods with care.
4.2 Packaging and storage
Do not remove packaging until just before commissioning.
Permissible conditions at the place of storage:
Storage temperature: -25 … +70 °C (-13 … +158 °F)
5. Commissioning, operation
■
Observe all instructions given on the shipment packaging for
removing the transportation safety devices.
■
Remove the oat switch carefully from the packaging!
■
When unpacking, check all components for any external damage.
5.1 Mounting preparation
Functional check
Before mounting, the oat switch can be connected as
described in chapter 5.3 and the switch points can be
operated manually.
4. Transport ... / 5. Commissioning, operation
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WARNING!
Physical injuries and damage to equipment
A fault with the electrical functional check can lead to a
malfunction in the plant and thus lead to injury to personnel
or damage to equipment.
▶
Ensure that the functional check does not start any
unintended processes.
▶
Do not carry out a functional check during operation or
when actively controlling.
Ensure that the sealing faces of the vessel or oat switch are clean and
do not show any mechanical damage.
5.2 Mounting
■
Observe the torque values of screws specied in pipetting work.
■
In the selection of the mounting material (sealings, screws, washers
and nuts), take the process conditions into account. The suitability
of the sealing must be specied with regard to the medium and its
vapours.
■
Install the oat switch using the mounting thread.
■
The model RLS-7000 is only suitable for
vertical installation, the model RLS-8000 only
for horizontal installation.
■
With the RLS-8000, ensure the correct
installation through the arrow direction on the
switch.
5. Commissioning, operation
Model RLS-7000
vertical installation
Model RLS-8000
horizontal installation
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5.3 Electrical connection
■
The electrical connection must only be made by qualied skilled
personnel.
■
Connection details and switching functions are given on the
connection diagram.
■
The mains connection lines to be provided must be dimensioned
for maximum instrument current supply and comply with IEC 227 or
IEC 245.
WARNING!
Physical injuries and damage to equipment
Electrical connection errors of the oat switches can destroy
the reed contacts. This can lead to a malfunction in the plant
and thus lead to injury to personnel or damage to equipment.
▶
No direct operation in circuits with inductive loads.
▶
No direct operation in circuits with capacitive loads, e.g.
PLC, PCS or cable lengths > 50 m.
▶
Do not exceed the permissible switching power.
DANGER!
Physical injuries
With oat switches with connection cable without protective
conductor connection, it is possible for the switch to become
live in the event of a malfunction. Any contact can result in
physical or even fatal injury.
▶
Only operate these switches at safety extra-low voltage
in accordance with IEC 60364 (VDE0100) or fit them
so that the float switch is electrically connected to the
equipotential bonding.
5. Commissioning, operation
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5. Commissioning, operation
Electrical protection class
Depending on the electrical connection, the instruments are designed
in protection class II. The appropriate protection class of the electrical
connection is given in the respective data sheet.
Protection class II:
Protective insulation, no protective conductor connection
Connection with inductive load
With inductive loads, the oat switches should be protected by
connection to an RC element or a free-wheeling diode.
Protective RC elements
Depending on the operating voltage, use RC elements exclusively in
accordance with the table below. RC elements other than those specied
here will lead to the destruction of the reed switch.
RC elements for reed contacts 10 VA
Voltage Resistance Capacitance Type of RC element
AC 24 V 100 Ω 0.33 μF A 3/24
AC 48 V 220 Ω 0.33 μF A 3/48
AC 115 V 470 Ω 0.33 μF A 3/115
AC 230 V 1,500 Ω 0.33 μF A 3/230
RC
element,
see table
S1
AC 24 ... 230 V
R
C
S1
DC 24 ... 230 V
+
–
AC voltage DC voltage
Free-
wheeling
diode, e.g.
1N4007
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Connection with capacitive load
To increase the service life of the contacts, we recommend
operation with a contact protection relay.
Connection diagrams, see product label
5.4 Commissioning
Switch on the voltage supply of the connected control device. Fill the
vessel and the check the switch points of the oat switch for function.
WARNING!
Physical injuries and damage to equipment
A fault with the electrical functional check can lead to a
malfunction in the plant and thus lead to injury to personnel
or damage to equipment.
▶
Ensure that the functional check does not start any
unintended processes.
▶
Do not carry out a functional check during operation or
when actively controlling.
Always observe the mounting and operating instructions of accessories
when commissioning them.
R
S
= 220 Ω (for AC 230 V)
C₁ = internal capacitance
S1 R
S
+
–
C
1
AC 230 V
AC voltage current limitation
e.g. for electronic time relay
Relay
5. Commissioning, operation
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6. Faults
The following table contains the most frequent causes of
faults and the necessary countermeasures.
Faults Causes Measures
No signal / incorrect
switching function
Vessel wall too thick Check the mounting situation
Float jammed Check the suitability of
the medium, clean the
contamination o the switch
Float is not oating Density of the medium is
too low, check material and
product selection
Switch is switching
without the oat moving
Shield from external magnetic
eld
Electrical connection
incorrect
see 5.3 “Electrical connection”
Check assignment with the
aid of the connection diagram
Moisture in the
electronics
Check the resistance of the
material
Cable damaged Instrument replacement
Reed contact defective Instrument replacement
Incorrect NO/NC
switching function
Model RLS-7000 Incorrectly mounted oat Turn the oat through 180°
Model RLS-8000 Incorrect direction of the
oat switch
Turn the instrument half way
around (180°), as per the
marking on the switch
Float switch cannot
be mounted at the
planned place on
the vessel
Process connection of
the oat switch does
not match the process
connection of the vessel.
Modication of the vessel;
Rework the thread or replace
the screwed coupling
Process connection at
the vessel defective
Rework the thread or replace
the screwed coupling
6. Faults
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CAUTION!
Physical injuries and damage to property and the
environment
If faults cannot be eliminated by means of the listed
measures, the instrument must be taken out of operation
immediately.
▶
Ensure that there is no longer any pressure present and
protect against being put into operation accidentally.
▶
Contact the manufacturer.
▶
If a return is needed, please follow the instructions given
in chapter 8.2 “Return”.
6. Faults
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7. Maintenance and cleaning
7.1 Maintenance
When used properly, the oat switches work maintenance-free. They
must be subjected to visual inspection within the context of regular
maintenance, however, and included in the vessel pressure test.
DANGER!
Physical injuries
Work on containers involves the danger of intoxication and
suocation.
▶
No work is allowed to be carried out unless by taking
suitable personal protective measures (e.g. respiratory
protection apparatus, protective clothing etc.).
Repairs must only be carried out by the manufacturer.
7.2 Cleaning
CAUTION!
Physical injuries and damage to property and the
environment
Improper cleaning may lead to physical injuries, damage
to property and the environment and to damage to the
instrument. Residual media in the dismounted instrument can
result in a risk to persons, the environment and equipment.
▶
Rinse or clean the dismounted instrument.
▶
Sufficient precautionary measures must be taken.
▶
Do not use any aggressive cleaning agents.
▶
Do not use any hard or pointed objects for cleaning.
1. Prior to cleaning, properly disconnect the instrument from the process
and the power supply.
2. Clean the instrument carefully with a moist cloth.
3. Electrical connections must not come into contact with moisture!
7. Maintenance and cleaning
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8. Dismounting, return and disposal
WARNING!
Physical injuries and damage to property and the
environment through residual media
Residual media in the dismounted instrument can result in a
risk to persons, the environment and equipment.
▶
Wash or clean the dismounted instrument, in order to
protect persons and the environment from exposure to
residual media.
8.1 Dismounting
Only disconnect the measuring instrument once the system has been
depressurised and the power disconnected!
8.2 Return
Wash or clean the dismounted oat switch before returning it, in order to
protect personnel and the environment from exposure to residual media.
Information on returns can be found under the heading
“Service” on our local website.
8.3 Disposal
Incorrect disposal can put the environment at risk.
Dispose of instrument components and packaging materials in an
environmentally compatible way and in accordance with the country-
specic waste disposal regulations.
Do not dispose of with household waste. Ensure a proper
disposal in accordance with national regulations.
8. Dismounting, return and disposal
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9. Specications
Specications
Switching
power
AC 230 V; 100 VA; 1 A; max. 100 Hz
DC 230 V; 50 W; 0.5 A
Accuracy ≤ 3 mm switch point accuracy incl. hysteresis, non-repeatability
Permissible
temperatures
■
Medium
■
Ambient
■
Storage
Polypropylene (PP):
-25 … +80 °C [-13 … +176 °F]
-25 … +80 °C [-13 … +176 °F]
-25 … +80 °C [-13 … +158 °F]
Polyamide PA6.6:
-25 … +100 °C [-13 … +212 °F]
-25 … +100 °C [-13 … +212 °F]
-25 … +80 °C [-13 … +158 °F]
Operating
pressure
≤ 4 bar [≤ 58.0 psi]
Density Polypropylene (PP):
≥ 700 kg/m³ [43.7 lbs/ft³]
Polyamide PA6.6:
≥ 750 kg/m³ [46.8 lbs/ft³]
For further specications see WIKA data sheets LM 50.11, LM 50.12 and
the order documentation.
9. Specications
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