KROHNE OPTISWITCH-3100C User Manual
Operating Instructions
OPTISWITCH 3100 C
with NAMUR 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 .........................
2.5 SIL conformity .........................
2.6 Safety instructions for Ex areas ............
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....................
4
4
4
5
5
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6
6
7
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8
9
10
11
5 Connecting to voltage supply
5.1 Preparing the connection .................
5.2 Connection steps.......................
5.3 Wiring plan, single chamber housing.........
6 Set up
6.1 General..............................
6.2 Adjustment elements ....................
6.3 Function chart .........................
6.4 Recurring function test ...................
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 .............................
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9 Supplement
9.1 Technical data.........................
9.2 Dimensions ...........................
Contents
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33
Supplementary operating instructions manuals
Information:
OPTISWITCH 3100 C is available in different versions.
Depending on the selected version, supplementary operating
instructions manuals may also come with the shipment. The
supplementary operating instructions manuals are listed in
section "Product description.
Operating instructions manuals for accessories and
replacement parts
Tip:
To ensure reliable setup and operation of your OPTISWITCH
3100 C, we offer accessories and replacement parts. The
associated documents are:
l Operating instructions manual "Oscillator"
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OPTISWITCH 3100 C - with NAMUR output 3
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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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 3100 C is a sensor for level detection.
Detailed information on the application range of OPTISWITCH
3100 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 3100 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 3100 C is in CE conformity with EMC (89/336/
EWG), fulfils NAMUR recommendation NE 21 and is in CE
conformity with LVD (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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For your safety
2.6 SIL conformity
OPTISWITCH 3100 C fulfills the requirements of functional
safety according to IEC 61508/IEC 61511. You can find further
information in the supplementary instructions manual "Safety
Manual - Functional safety (SIL) OPTISWITCH 3XXX".
2.7 Safety instructions for Exareas
Please note the Ex-specific safety information for installation
and operation in Ex areas. These safety instructions are part of
the operating instructions manual and come with the Exapproved instruments.
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3 Product description
3.1 Configuration
Product description
Scope of delivery
Components
The scope of delivery encompasses:
l OPTISWITCH 3100 C level sensor
l Documentation
- this operating instructions manual
- Supplementary instructions manual "Plug connector for
level sensors" (optional)
- Ex specific safety instructions (with Ex versions), if
necessary further certificates
OPTISWITCH 3100 C consists of the following components:
l Housing cover
l Housing with electronics
l process fitting with tuning fork
1
2
3
Fig. 1: OPTISWITCH 3100 C with plastic housing
1 Housing cover
2 Housing with electronics
3 Process fitting
3.2 Principle of operation
Area of application
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OPTISWITCH 3100 C is a level sensor with tuning fork for level
detection.
It is designed for industrial use in all areas of process
technology and is preferably used for bulk solids.
Typical applications are overfill and dry run protection. Thanks
to its simple and robust measuring system, OPTISWITCH
3100 C is virtually unaffected by the chemical and physical
properties of the bulk solid.
Product description
It functions even when exposed to strong external vibration or
changing products.
Solid detection in water
If OPTISWITCH 3100 C was ordered for detection of solids in
water, the tuning fork is adjusted to the density of water. In the
air or when covered by water (density: 1 g/cm³/0.036 lbs/in)
OPTISWITCH 3100 C signals "uncovered". Only if the
vibrating element is also covered with solids (e.g. sand,
sludge, gravel etc.) will the sensor signal "covered".
Fault monitoring
The electronics of OPTISWITCH 3100 C continuously monitors the following criteria:
l Correct vibrating frequency
l Line break to the piezo drive
If one of these faults is detected, the electronics signals this via
adefined current to the signal conditioning instrument. The
connection cable to the vibrating element is also monitored.
Physical principle
Power supply
The tuning fork is piezoelectrically energised and vibrates at its
mechanical resonance frequency of approx. 150 Hz. When the
tuning fork is submerged in the product, the vibration
amplitude changes. This change is detected by the integrated
oscillator and converted into a switching command.
OPTISWITCH 3100 C with NAMUR electronics can be
connected to different NAMUR amplifiers depending on your
requirements. The specifications for NAMUR amplifiers are
available in the "Technical data".
The exact range of the power supply is stated in the "Technical
data" in the "Supplement".
3.3 Operation
With the factory setting, products with a density of >0.02 g/cm³
(>0.0008 lbs/in³) can be measured. The instrument can also
be adapted to products with lower density >0.008 g/cm³
(>0.0003 lbs/in³).
On the electronics module you will find the following indicating
and adjustment elements:
l signal lamp for indication of the switching condition (yellow)
l potentiometer for adaptation to the product density
l Mode switch to select the switching condition (reverse
characteristics)
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l Simulation key
3.4 Storage and transport
Product description
Packaging
Storage and transport tem-
perature
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.
The packaging of standard instruments consists of environ-
ment-friendly, recyclable cardboard. In addition, the sensor is
provided with a protective cover of cardboard. For special
versions PE foam or PE foil is also used. Dispose of the
packaging material via specialised recycling companies.
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
Moisture
In general, OPTISWITCH 3100 C can be mounted in any
position. The instrument must be mounted in such a way that
the vibrating element is at the height of the requested switching
point.
Use the recommended cables (see chapter "Connecting to
power supply") and tighten the cable gland.
You can give your OPTISWITCH 3100 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. 2: Measures against moisture penetration
Transport
Do not hold OPTISWITCH 3100 C on the vibrating element.
Especially with flange and tube versions, the sensor can be
damaged by the weight of the instrument.
Remove the protective cover just before mounting.
Pressure/Vacuum
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.
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Mounting
Handling
Socket
Filling opening
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
The vibrating element should protrude into the vessel to avoid
buildup. For that reason, avoid using mounting bosses for
flanges and screwed fittings. This applies particularly to use
with adhesive products.
Mount the instrument in such a way that the tuning fork does
not protrude directly into the filling stream.
a.
b.
20°
Fig. 3: Horizontal mounting
a Convex mounting
b Concave mounting
If such an installation location should be necessary, mount a
suitable protective sheet above or in front of the vibrating
element - see illustration a.).
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