KROHNE OPTISWITCH 4000 C Operating Manual
Operating Instructions
OPTISWITCH 4000 C
with transistor output
Contents
Contents
1 About this document
1.1 Function .............................
1.2 Target group ..........................
1.3 Symbolism used .......................
2 For your safety
2.1 Authorised personnel....................
2.2 Appropriate use........................
2.3 Warning about misuse ...................
2.4 CE conformity .........................
3 Product description
3.1 Configuration..........................
3.2 Principle of operation ....................
3.3 Operation ............................
3.4 Storage and transport ...................
4 Mounting
4.1 General instructions.....................
4.2 Mounting instructions....................
5 Connecting to voltage supply
5.1 Preparing the connection .................
5.2 Wiring plan ...........................
3
3
3
4
4
4
4
5
5
6
6
8
10
13
14
6 Set up
6.1 Indication of the switching status ...........
6.2 Function test ..........................
6.3 Function chart .........................
7 Maintenance and fault rectification
7.1 Maintenance ..........................
7.2 Rectify faults ..........................
7.3 Exchange the electronics .................
7.4 Instrument repair .......................
8 Dismounting
8.1 Dismounting procedure ..................
8.2 Disposal .............................
9 Supplement
9.1 Technical data.........................
9.2 Dimensions ...........................
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About this document
1 About this document
1.1 Function
This operating instructions manual has all the information you
need for quick setup and safe operation. Please read this
manual before you start setup.
1.2 Target group
This operating instructions manual is directed to trained,
qualified personnel. The contents of this manual should be
made available to these personnel and put into practice by
them.
1.3 Symbolism used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or
malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or
serious damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons
and/or destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
l List
The dot set in front indicates a list with no implied sequence.
à Action
This arrow indicates a single action.
1 Sequence
Numbers set in front indicate successive steps in a procedure.
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OPTISWITCH 4000 C - with transistor output 3
For your safety
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual
must be carried out only by trained specialist personnel
authorised by the operator. For safety and warranty reasons,
any internal work on the instruments must be carried out only
by personnel authorised by the manufacturer.
2.2 Appropriate use
OPTISWITCH 4000 C is a sensor for level detection.
Detailed information on the application range of OPTISWITCH
4000 C is available in chapter "Product description".
2.3 Warning about misuse
Inappropriate or incorrect use of the instrument can give rise to
application-specific hazards, e.g. vessel overfill or damage to
system components through incorrect mounting or adjustment.
2.4 General safety instructions
OPTISWITCH 4000 C is a high-tech instrument requiring the
strict observance of standard regulations and guidelines. The
user must take note of the safety instructions in this operating
instructions manual, the country-specific installation standards
(e.g. the VDE regulations in Germany) as well as all prevailing
safety regulations and accident prevention rules.
2.5 CE conformity
OPTISWITCH 4000 C is in CE conformity with EMC (89/336/
EWG), fulfils Namur recommendation NE 21 and NE 23 and is
in CE conformity with NSR (73/23/EWG).
Conformity has been judged according to the following
standards:
l EMC:
- Emission EN 61326: 1997 (class B)
- Susceptibility EN 61326: 1997/A1:1998
l LVD: EN 61010-1: 2001
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3 Product description
3.1 Configuration
Product description
Scope of delivery
Components
The scope of delivery encompasses:
l OPTISWITCH 4000 C level sensor
l Test magnet
l Documentation
- this operating instructions manual
- if necessary, certificates
OPTISWITCH 4000 C consists of the following components:
l Housing with electronics
l process fitting with tuning fork
Fig. 1: OPTISWITCH 4000 C
3.2 Principle of operation
Area of application
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OPTISWITCH 4000 C - with transistor output 5
OPTISWITCH 4000 C is a level sensor with tuning fork for level
detection.
It is designed for industrial use in all areas of process
technology and can be used in liquids.
Typical applications are overfill and dry run protection. With a
tuning fork of only 40 mm length, OPTISWITCH 4000 C can be
also mounted, e.g. in pipelines from DN 25. The small tuning
Product description
fork allows use in vessels, tanks and pipes. Thanks to its
simple and robust measuring system, OPTISWITCH 4000 C is
virtually unaffected by the chemical and physical properties of
the liquid.
It functions even under difficult conditions such as turbulence,
air bubbles, foam generation, buildup, strong external vibration
or changing products.
Fault monitoring
The electronics module of OPTISWITCH 4000 C continuously
monitors via frequency evaluation the following criteria:
l Strong corrosion or damage on the tuning fork
l loss of vibration
l Line break to the piezo drive
If a malfunction is detected or in case of power failure, the
electronics takes on a defined switching condition, i.e. the
output transistor blocks (safe condition).
Physical principle
Power supply
Packaging
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 1200 Hz. The
piezos are fixed mechanically and are hence not subject to
temperature shock limitations. The frequency changes when
the tuning fork is covered by the medium. This change is
detected by the integrated oscillator and converted into a
switching command.
OPTISWITCH 4000 C is a compact instrument, i.e. it can be
operated without external evaluation system. The integrated
electronics evaluates the level signal and outputs a switching
signal. With this switching signal, a connected device can be
directly activated (e.g. a warning system, a PLC, a pump etc.).
The exact range of the power supply is stated in the "Technical
data" in the "Supplement".
3.3 Operation
The switching status of OPTISWITCH 4000 C can be checked
with closed housing (signal lamp). Products with a density
>0.7 g/cm³ (>0.025 lbs/in³) can be detected.
3.4 Storage and transport
Your instrument was protected by packaging during transport.
Its capacity to handle normal loads during transport is assured
by a test according to DIN 55439.
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6 OPTISWITCH 4000 C - with transistor output
Product description
The packaging of standard instruments consists of environ-
ment-friendly, recyclable cardboard. For special versions, PE
foam or PE foil is also used. Dispose of the packaging material
via specialised recycling companies.
Storage and transport temperature
l Storage and transport temperature see "Supplement -
Technical data - Ambient conditions"
l Relative humidity 20 … 85 %
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Mounting
4 Mounting
4.1 General instructions
Switching point
In general, OPTISWITCH 4000 C can be mounted in any
position. The instrument must be mounted in such a way that
the tuning fork is at the height of the requested switching point.
The tuning fork has lateral marking (notches), marking the
switching point with vertical mounting. The switching point
refers to water (1 g/cm³ or 0.036 lbs/in³). When mounting
OPTISWITCH 4000 C, make sure that this marking is at the
height of the requested switching point. Keep in mind that the
switching point of the instrument is shifted if the medium has a
density other than water.
2
")
")
64
/
33
13mm
(
64
/
33
13mm
(
1
3
Fig. 2: Vertical mounting
1 Switching point approx. 13 mm (0.51 in)
2 Switching point with lower density
3 Switching point with higher density
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Mounting
1
2
Fig. 3: Horizontal mounting
1 Switching point
2 Switching point (recommended mounting position - particularly for adhesive
products)
Moisture
Use the recommended cables (see chapter "Connecting to
power supply") and tighten the cable gland.
You can give your OPTISWITCH 4000 C additional protection
against moisture penetration by leading the connection cable
downward in front of the cable entry. Rain and condensation
water can thus drain off. This applies mainly to mounting
outdoors, in areas where moisture is expected (e.g. by
cleaning processes) or on cooled or heated vessels.
Fig. 4: Measures against moisture penetration
Transport
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OPTISWITCH 4000 C - with transistor output 9
Do not hold OPTISWITCH 4000 C on the tuning fork.
Mounting
Pressure/Vacuum
Handling
Welded socket
The process fitting must be sealed if there is gauge or low
pressure in the vessel. Before use, check if the seal material is
resistant against the measured product and the process
temperature.
The max. permissible pressure is stated in the "Technical
data" in the "Supplement" or on the type label of the sensor.
The vibrating level switch is a measuring instrument and must
be treated accordingly. Bending the vibrating element will
destroy the instrument.
Warning:
The housing must not be used to screw in the instrument!
Applying tightening force on the housing can damage its
internal mechanical parts.
To screw in, use the hexagon above the thread.
4.2 Mounting instructions
For welded socket with O-ring in front and welding marking.
OPTISWITCH 4000 C has a defined thread runout point. This
means that every OPTISWITCH 4000 C is in the same position
after being screwed in. Remove therefore the supplied flat seal
from the thread of OPTISWITCH 4000 C. This flat seal is not
required when using a welded socket with front-flush O-ring.
Before welding, unscrew OPTISWITCH 4000 C and remove
the rubber ring from the welded socket.
The welded socket has a marking (notch). For horizontal
mounting, weld the socket with the notch facing upward or
downward; in pipelines aligned with the direction of flow.
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