WIKA RLT-1000 User manual

DE
EN
Operating instructions
Betriebsanleitung
Mode d‘emploi
Manual de instrucciones
ES
FR
Level sensor with reed measuring chain
Models RLT-1000, RLT-2000, RLT-3000
Niveau-Messwertgeber mit Reed-Messkette
Typen RLT-1000, RLT-2000, RLT-3000
Capteur de niveau avec chaîne de mesure Reed
Types RLT-1000, RLT-2000, RLT-3000
Transmisores de nivel con cadena de medición Reed
Modelos RLT-1000, RLT-2000, RLT-3000
Model RLT-1000 Model RLT-2000

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WIKA operating instructions models RLT
DE
EN
ES
FR
Operating instructions models RLT-1000,
RLT-2000, RLT-3000 Page 3 - 22
Betriebsanleitung Typen RLT-1000, RLT-2000,
RLT-3000 Seite 23 - 42
Mode d‘emploi types RLT-1000, RLT-2000,
RLT-3000 Page 43 - 62
Manual de instrucciones modelos RLT-1000,
RLT-2000, RLT-3000 Página 63 - 81
© 07/2018 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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Contents
Contents
Declarations of conformity can be found online at www.wika.com.
1. General information 4
2. Design and function 5
3. Safety 6
4. Transport, packaging and storage 11
5. Commissioning, operation 11
6. Faults 15
7. Maintenance and cleaning 16
8. Dismounting, return and disposal 17
9. Specications 18

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WIKA operating instructions models RLT
1. General information
■
The level sensors 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 certied 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 onto the
next user 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 modications.
■
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: LM 50.01 (model RLT-2000)
LM 50.02 (model RLT-1000)
LM 50.05 (model RLT-3000)
- Application consultant: Tel.: [phone]
Fax: [phone]
inf[email protected]
1. General information

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2.2 Scope of delivery
■
Level sensor
■
Operating instructions
Cross-check scope of delivery with delivery note.
2. Design and function
2.1 Functional description
Level sensors work on the oat principle with magnetic transmission.
A permanent magnet built into the oat triggers, with its magnetic
eld, the resistance measuring chain built into the guide tube .
The entire assembly corresponds to a 3-wire potentiometer circuit.
The oat changes its height with the level of the medium it is
monitoring.The measured resistance signal is proportional to the level.
The measurement voltage is very nely stepped due to the contact
separation of the resistance measuring chain and is thus virtually
continuous.






≤ 30°

Connection housing
Cable gland
Spanner ats for screwing in
Sealing
Guide tube
Float
Float stop
2. Design and function

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WIKA operating instructions models RLT
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 ecient and trouble-free operation.
3.2 Intended use
Level sensors are used exclusively for monitoring the levels of liquid
media. The scope of application is dened by the technical performance
limits and materials.
■
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 level sensor are suciently resistant to the medium
being monitored. Not suitable for dispersions, abrasive liquids, highly
viscous media and colours.
3. Safety

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■
This instrument is not permitted to be used in hazardous areas!
■
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 aected by magnetic elds (min. clearance 1 m).
■
The level sensors must not be exposed to heavy mechanical strain
(impact, bending, vibration).
■
The technical specications contained in these operating instructions
must be observed. Improper handling or operation of the instrument
outside of its technical specications 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.
DANGER!
Work on containers involves the danger of intoxication and
suocation. No work is allowed to be carried out unless by
taking suitable personal protective measures (e.g. respiratory
protection apparatus, protective outt etc.).
3. Safety

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WIKA operating instructions models RLT
3.3 Improper use
Improper use is dened 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 dierent 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.
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. Safety

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3.5 Personnelqualication
WARNING!
Riskofinjuryshouldqualicationbeinsucient
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-specic regulations, current standards
and directives, are capable of carrying out the work described and
independently recognising potential hazards.
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. Safety

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WIKA operating instructions models RLT
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 level sensor for any damage that may have been caused by
transport. Obvious damage must be reported immediately.
CAUTION!
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: -30 … +80 °C (-22 … +176 °F)
5. Commissioning, operation
■
Observe all instructions given on the shipment packaging for
removing the transportation safety devices.
■
Remove the level sensor carefully from the packaging!
■
When unpacking, check all components for any external damage.
5.1 Functional check
Prior to installation, a functional check of the level sensor can be
carried out with a resistance measuring instrument or a multimeter (for
instruments with 4 ... 20 mA output signal) and manual movement of the
oat.
4. Transport ... / 5. Commissioning, operation

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WIKA operating instructions models RLT
The following table describes the 3-wire resistance measurement and
the expected measured values for the movement of the oat, starting
from the oat stop in the direction of the tank opening.
Resistance measurement
of the wire colours
Measured value
BN―GN(R1)
Brown ― green
Resistance value rises proportionally with the
position of the oat.
WH―BN(R2)
White ― brown
Resistance value drops in inverse proportion
to the position of the oat.
GN―WH(Ri)
Green ― white
Overall resistance of the measuring chain
remains almost constant, irrespective of the
position of the oat
WARNING!
Ensure that the functional check does not start any
unintended processes.
5.2 Mounting preparation
Ensure that the sealing faces of the vessel or level sensor are clean and
do not show any mechanical damage.
5.3 Mounting
■
Observe the torque values of screws specied in pipetting 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 specied with regard to the medium and
its vapours. In addition, ensure it has corresponding corrosion
resistance.
■
The guide tube should not be inclined more than a maximum of
30° to the vertical.
■
Mount the level sensor correctly for the design of the process
connection.
5. Commissioning, operation







≤ 30°

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■
If the opening of the process connection is too small for the oat, the
oat must be removed before mounting.
- Before removal, mark the position of the oat stop with a
waterproof pen
- Mark the mounting position of the oat (e.g. “Up”)
- After the level sensor has been mounted, the oat should be
re-attached within the inside of the tank (pay attention to the
mounting position!).
- Secure the oat stop again at the marked point.
5. Commissioning, operation

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WIKA operating instructions models RLT
5.4 Electrical connection
■
The electrical connection must only be made by qualied skilled
personnel.
■
Wire the level sensor in accordance with the connection diagram of
the electrical output (see product label).The connection terminals are
appropriately marked.
Electrical output Connection diagram
3-wire potentiometer
circuit
4 ... 20 mA
R
I
A
4 ... 20 mA
+
–
DC 12 ... 32 V
■
Seal the cable bushing at the connection housing (see
illustration in chapter 5.3 “Mounting”).
WARNING!
Malfunctions through voltage spikes due to running cables
together with mains connection leads or due to large cable
lengths.
This can lead to a malfunction in the plant and thus lead to
injury to personnel or damage to equipment.
▶
Use shielded connection leads.
▶
Ground connection leads at one end.
Always observe the mounting and operating instructions of accessories
when commissioning them.
GN
BN
WH
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
Level sensor cannot
be mounted at the
planned place on the
vessel
Process connection of
the level sensor does
not match the process
connection of the vessel
Modication of the vessel
Process connection at
the vessel defective
Rework the thread or replace
the screwed coupling
No signal, non-linear
orundenedsignals
Electrical connection
incorrect
See chapter 5.4 “Electrical
connection”. Check
assignment with the aid of the
connection diagram.
Measuring chain or
4 ... 20 mA evaluation
electronics defective
Return to the manufacturer
PLC evaluation
defective
Functional check of the
level sensor with resistance
measuring instrument/
multimeter
Analogue transmitter
shows signal < 4 mA
or > 25 mA
Cable break or
measuring chain
damaged
Functional check of the level
sensor, replacement as
required
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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WIKA operating instructions models RLT
7. Maintenance and cleaning
7.1 Maintenance
When used properly, the level sensors 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!
Work on containers involves the danger of intoxication and
suocation. No work is allowed to be carried out unless by
taking suitable personal protective measures (e.g. respiratory
protection apparatus, protective outt etc.).
Repairs must only be carried out by the manufacturer.
Perfect functioning of the level sensors can only be
guaranteed when original accessories and spare parts are
used.
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 level sensor 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-
specic waste disposal regulations.
8. Dismounting, return and disposal

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WIKA operating instructions models RLT
9. Specications
■
Model RLT-1000
Specications
Output signal
■
Variable resistance
The overall resistance of the reed chain is
approx. 1 ... 10 kΩ, depending on the measuring
range
Max. voltage < DC 40 V
■
Current output, 4 ... 20 mA, 2-wire
Power supply: DC 12 ... 32 V
Load in Ω: ≤ (power supply - 12 V) / 0.02 A
Accuracy, resolution
■
12 mm
■
10 mm
■
6 mm
■
3 mm
Permissible temperatures
■
Medium
■
Ambient
■
Storage
-30 … +80 °C (-22 … +176 °F)
Option: -30 … +120 °C (-22 … +248 °F) 1)
-30 … +80 °C (-22 … +176 °F)
-30 … +80 °C (-22 … +176 °F)
1) Not with cable material: PVC, PUR; not with oat outer diameter ∅ D = 30 mm; not with connection housing
58 x 64 x 36 mm
9.Specications

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9.Specications
■
Model RLT-2000
Specications
Output signal
■
Variable resistance
The overall resistance of the reed chain is
approx. 1 ... 10 kΩ, depending on the measuring
range
Max. voltage < DC 40 V
■
Current output, 4 ... 20 mA, 2-wire
Power supply: DC 12 ... 32 V
Load in Ω: ≤ (power supply - 12 V) / 0.02 A
Accuracy, resolution
■
12 mm
■
10 mm
■
6 mm
■
3 mm
Permissible temperatures
■
Medium
■
Ambient
■
Storage
PP: -10 … +80 °C (14 … 176 °F)
PVDF (option): -10 … +80 °C (14 … 176 °F)
Option: -30 … +120 °C (-22 … +248 °F)
PP: -10 … +80 °C (14 … 176 °F)
PVDF (option): -30 … +80 °C (-22 … +176 °F)
PP: -10 … +80 °C (14 … 176 °F)
PVDF (option): -30 … +80 °C (-22 … +176 °F)

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WIKA operating instructions models RLT
■
Model RLT-3000
Specications Level Temperature
Output signal
■
Current output,
4 ... 20 mA, 2-wire
Power supply:
DC 12 ... 32 V
Load in Ω:
≤ (power supply
- 12 V) / 0.02 A
■
Pt100, 2-wire
■
Pt1000, 2-wire
■
Current output,
4 ... 20 mA, 2-wire
Power supply:
DC 12 ... 32 V
Load in Ω:
≤ (power supply - 12 V)
/ 0.02 A
Accuracy
■
12 mm
■
10 mm
■
6 mm
■
3 mm
For reed-chain
technology, the
accuracy corresponds
to the resolution.
Class B per
DIN EN 60751,
for Pt100 / Pt1000
0.5 %, for current output
4 ... 20 mA
Permissible temperatures
■
Medium
■
Ambient
■
Storage
-30 … +100 °C (-22 … +212 °F)
-30 … +80 °C (-22 … +176 °F)
-30 … +80 °C (-22 … +176 °F)
9.Specications