WIKA RLT-1000 User manual

DE
EN
Operating instructions
Betriebsanleitung
Mode d‘emploi
Manual de instrucciones
ES
FR
Reed-chain level sensor
Models RLT-1000, RLT-2000, RLT-3000
Reed-Ketten-Füllstandssensor
Typen RLT-1000, RLT-2000, RLT-3000
Mesure de niveau avec chaîne de mesure reed
Types RLT-1000, RLT-2000, RLT-3000
Sensor de nivel de cadena de Reeds
Modelos RLT-1000, RLT-2000, RLT-3000
Model RLT-1000 Model RLT-2000 Model RLT-3000

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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!
1. General information

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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 14
7. Maintenance and cleaning 15
8. Dismounting, return and disposal 17
9. Specications 18
Declarations of conformity can be found online at www.wika.com.

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4WIKA 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 crite-
ria 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 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 documenta-
tion 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]
[email protected]
1. General information

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2. Design and function
■
Bullet
▶
Instruction
1. ... x. Follow the instruction step by step
⇒
Result of an instruction
→See ... cross-references
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 measure-
ment 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 limitation

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6WIKA operating instructions models RLT
2.2 Scope of delivery
■
Level sensor
■
Operating instructions
Cross-check scope of delivery with delivery note.
2. Design and function / 3. Safety
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.

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3. Safety
■
This instrument is not permitted to be used in hazardous areas!
■
Do not operate the instrument in the direct vicinity of ferromagnetic
environments (min. clearance 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. protective
breathing apparatus, protective clothing etc.).

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8WIKA operating instructions models RLT
3. Safety
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 situa-
tions and injuries.
▶
Refrain from unauthorised modifications to the instru-
ment.
▶
Do not use the instrument within hazardous areas.
Any use beyond or dierent to the intended use is considered as impro-
per use.
Do not use this instrument in safety or emergency shutdown 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 instruc-
tions 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.

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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 property.
▶
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 measu-
rement 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 recognis-
ing 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.
3. Safety

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10 WIKA operating instructions models RLT
Follow the instructions displayed in the work area regarding
personal protective equipment!
3. Safety
The requisite personal protective equipment must be provided by the
operating company.
3.7 Labelling, safety marks
Product label (example)
Model
P# product number
S# serial number
Electrical connection
Medium temperature limit / Ingress protection
Do not dispose of with household waste. Ensure a proper
disposal in accordance with national regulations.
Before mounting and commissioning the instrument, ensure
you read the operating instructions!
WIKA Alexander Wiegand SE & Co. KG, 63911 Klingenberg/Germany





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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.
1.1 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 instru-
ments with current or voltage output signal) and manual movement of the
oat.
The following table describes the 3-wire resistance measurement and
the expected measured values for the movement of the oat, starting
from the oat limitation in the direction of the tank opening.
4. Transport ... / 5. Commissioning, operation

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12 WIKA operating instructions models RLT
Resistance measu-
rement 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 uninten-
ded 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 resis-
tance.
■
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.
■
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 limitation with a
waterproof pen
- Mark the mounting position of the oat (e.g. “Up”)
5. Commissioning, operation

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- After the level sensor has been mounted, the oat should be
reattached within the inside of the tank (pay attention to the
mounting position!).
- Secure the oat limitation again at the marked point.
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
Current output signal
R
I
A
4 ... 20 mA
+
–
DC 12 ... 32 V
Voltage output signal
■
Seal the cable bushing at the connection housing  (see gure in
chapter 5.3 „Mounting“).
GN
BN
WH
U -U
R
+12…32 V DC
S
0…10 V
0…5 V
5. Commissioning, operation

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14 WIKA operating instructions models RLT
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 property.
▶
Use shielded connection leads.
▶
Ground connection leads at one end.
Always observe the mounting and operating instructions of accessories
when commissioning them.
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 con-
nection 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 evalua-
tion electronics defective
Return to the manufac-
turer
PLC evaluation defective Functional check of the le-
vel sensor with resistance
measuring instrument/
multimeter
5. Commissioning, operation / 6. Faults

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Faults Causes Measures
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“.
7. Maintenance and cleaning
7.1 Maintenance
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. protective
breathing apparatus, protective clothing etc.).
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.
Repairs must only be carried out by the manufacturer.
Perfect functioning of the level sensors can only be guaran-
teed when original accessories and spare parts are used.
6. Faults / 7. Maintenance and cleaning

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16 WIKA operating instructions models RLT
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 instru-
ment. 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.
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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18 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, 2-wire
Auxiliary power: DC 12 ... 32 V
Load in Ω: ≤ (auxiliary power - 12 V) / 0.02 A
■
Voltage output, 3-wire
Auxiliary power: DC 12 ... 32 V
Load: > maximum output signal / 1 mA
Accuracy, resolution
■
24 mm [0.94 in]
■
20 mm [0.79 in]
■
12 mm [0.47 in]
■
10 mm [0.39 in]
■
6 mm [0.24 in]
■
3 mm [0.12 in]
Operating conditions
Medium temperature
limit
-30 … +80 °C [-22 … +176 °F]
Option: -30 … +120 °C [-22 … +248 °F] 1)
Ambient temperature
limit
-30 … +80 °C [-22 … +176 °F]
Storage temperature
limit
-30 … +80 °C [-22 … +176 °F]
1) Not with cable material: PVC, PUR; not with oat outer diameter ∅ D = 30 mm [1.18 in]; not with connection
housing 58 x 64 x 36 mm [2.28 x 2.52 x 1.42 in]
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, 2-wire
Auxiliary power: DC 12 ... 32 V
Load in Ω: ≤ (auxiliary power - 12 V) / 0.02 A
■
Voltage output, 3-wire
Auxiliary power: DC 12 ... 32 V
Load: > maximum output signal / 1 mA
Accuracy, resolution
■
24 mm [0.94 in]
■
20 mm [0.79 in]
■
12 mm [0.47 in]
■
10 mm [0.39 in]
■
6 mm [0.24 in]
■
3 mm [0.12 in]
Operating conditions
Medium temperature
limit
■
PP: -10 … +80 °C [14 … 176 °F]
■
PVDF (option): -10 … +80 °C [14 … 176 °F]
■
Option: -30 … +120 °C [-22 … +248 °F]
Ambient temperature
limit
■
PP: -10 … +80 °C [14 … 176 °F]
■
PVDF (option): -30 … +80 °C [-22 … +176 °F]
Storage temperature
limit
■
PP: -10 … +80 °C [14 … 176 °F]
■
PVDF (option): -30 … +80 °C [-22 … +176 °F]

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20 WIKA operating instructions models RLT
■
Model RLT-3000
Specications Level Temperature
Output signal
■
Current output, 2-wire
Auxiliary power:
DC 12 ... 32 V
Load in Ω:
≤ (auxiliary power -
12 V) / 0.02 A
■
Voltage output, 3-wire
Auxiliary power: DC 12
... 32 V
Load: > maximum
output signal / 1 mA
■
Pt100, 2-wire
■
Pt1000, 2-wire
Accuracy
■
24 mm [0.94 in]
■
20 mm [0.79 in]
■
12 mm [0.47 in]
■
10 mm [0.39 in]
■
6 mm [0.24 in]
■
3 mm [0.12 in]
For reed-chain technology,
the accuracy corresponds
to the resolution.
Class B per
DIN EN 60751, for
Pt100 / Pt1000
Operating conditions
Medium temperature
limit
-30 … +100 °C [-22 … +212 °F]
Ambient temperature
limit
-30 … +80 °C [-22 … +176 °F]
Storage temperature
limit
-30 … +80 °C [-22 … +176 °F]
9.Specications