KROHNE OPTISOUND 3020 C Operating Manual
Operating Instructions
OPTISOUND 3020 C
4 ... 20 mA/HART - four-wire
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 General safety instructions ................
2.5 CE conformity .........................
2.6 Compatibility acc. to NAMUR NE 53 .........
2.7 Safety information for Ex areas.............
3 Product description
3.1 Configuration..........................
3.2 Principle of operation ....................
3.3 Adjustment ...........................
3.4 Storage and transport ...................
4 Mounting
4.1 General instructions.....................
4.2 Mounting information ....................
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6
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9
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13
5 Connecting to power supply
5.1 Preparing the connection .................
5.2 Connection procedure ...................
5.3 Wiring plans, double chamber housing .......
5.4 Switch on phase .......................
6 Setup with the indicating/adjustment module
6.1 Short description .......................
6.2 Installation of the indicating/adjustment module .
6.3 Adjustment system .....................
6.4 Setup procedure .......................
6.5 Menu schematic .......................
7 Maintenance and fault rectification
7.1 Maintenance ..........................
7.2 Fault rectification .......................
7.3 Exchanging the electronics................
7.4 Instrument repair .......................
2 OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire
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8 Dismounting
8.1 Dismounting procedure ..................
8.2 Disposal .............................
9 Supplement
9.1 Technical data.........................
9.2 Dimensions ...........................
9.3 Certificate ............................
Contents
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Supplementary operating instructions manuals
Information:
OPTISOUND 3020 C is available in different versions and is
supplied specifically acc. to the order. Depending on the
selected version, supplementary operating instructions manuals come with the shipment. The supplementary operating
instructions are stated in paragraph "3. Product description".
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OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire 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 of OPTISOUND 3020
C. Please read this manual before you start setup.
1.2 Target group
This operating instructions manual is directed to trained
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, warning, danger
This symbol informs you of a dangerous situation that could
occur. Ignoring this cautionary note can impair the person and/
or the instrument.
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, specialised 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
OPTISOUND 3020 C is a sensor for continuous level
measurement.
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
OPTISOUND 3020 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
OPTISOUND 3020 C is in CE conformity with EMC (89/336/
EWG), fulfils the NAMUR recommendation NE 21 and is in CE
conformity with LVD (73/23/EWG).
Conformity has been judged acc. to the following standards:
l EMC:
- Emission EN 61326: 1997 (class A)
- Susceptibility EN 61326: 1997/A1: 1998
l LVD: EN 61010-1: 2001
2.6 Compatibility acc. to NAMUR NE 53
OPTISOUND 3020 C meets NAMUR recommendation NE 53.
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OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire 5
For your safety
The parameter adjustment of the basic sensor functions is
independent of the software version. The range of available
functions depends on the respective software version of the
individual components.
The software version of OPTISOUND 3020 C can be
determined as follows:
l on the type label of the electronics
l via the indicating/adjustment module.
You can find all software histories on our website www.krohne.
com.
2.7 Safety information for Ex areas
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 OPTISOUND 3020 C ultrasonic sensor
l Documentation
- this operating instructions manual
- Ex-specific safety instructions (with Ex versions) and, if
necessary, further certificates
- Operating instructions manual "Indicating and adjust-
ment module" - optional
OPTISOUND 3020 C consists of the following components:
l Process fitting with transducer
l Housing with electronics
l Housing cover, optionally available with indicating/adjust-
ment module
The components are available in different versions.
1
2
3
Fig. 1: OPTISOUND 3020 C, version with plastic housing
1 Housing cover, optionally available with indicating/adjustment module
2 Housing with electronics
3 Process fitting with transducer
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OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire 7
Product description
3.2 Principle of operation
Area of application
Physical principle
Power supply
OPTISOUND 3020 C is an ultrasonic sensor for continuous
level measurement. It is suitable for liquids and solids in
virtually all industries, particularly in water and waste water
management.
The transducer of the ultrasonic sensor emits short ultrasonic
pulses to the measured product. These pulses are reflected by
the product surface and received by the transducer as echoes.
The running time of the ultrasonic pulses from emission to
reception is proportional to the distance and hence to the level.
The determined level is converted into an appropriate output
signal and outputted as measured value.
Four-wire electronics with separate power supply.
The power supply range can differ depending on the instru-
ment version. The exact range is stated in the "Technical data"
in the "Supplement".
Measured value transmission is carried out via the 4 ... 20 mA/
HART output, which is separated from the power supply.
3.3 Adjustment
OPTISOUND 3020 C can be adjusted with two different
adjustment media:
l the indicating/adjustment module
l a HART handheld
The entered parameters are generally saved in OPTISOUND
3020 C, optionally also in the indicating/adjustment module.
3.4 Storage and transport
Packaging
Storage and transport tem-
perature
8 OPTISOUND 3020 C - 4 ... 20 mA/HART - four-wire
Your instrument was protected by packaging during transport.
Its capacity to handle normal loads during transport is assured
by a test acc. to DIN EN 24180.
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.
l Storage and transport temperature see "Supplement –
Technical data – Ambient conditions"
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l Relative humidity 20 … 85 %
Product description
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Mounting
4 Mounting
4.1 General instructions
Installation position
Moisture
Select an installation position you can easily reach for
mounting and connecting as well as later retrofitting of an
indicating and adjustment module. The housing can be rotated
by 330° without the use of any tools. You can also install the
indicating and adjustment module in four different positions
(each displaced by 90°).
Use the recommended cable (see chapter "Connecting to
power supply") and thighten the cable gland.
You can give your OPTISOUND 3020 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
Measuring range
The reference plane for the measuring range is the lower edge
of the transducer.
Make sure that the min. distance, corresponding to the so
called dead band, is maintained below the reference plane measurement is not possible in this areas. The exact value of
the dead band is stated in chapter "Technical data" in the
Supplement.
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Mounting
2
1
Fig. 3: Min. distance to the max. level
1 Dead zone
2 Reference plane
Information:
If the product reaches the transducer, buildup can form on it
over a period of time and later cause measurement errors.
132
100%
0%
Fig. 4: Measuring range (operating range) and max. measuring distance
1 full
2 empty (max. measuring distance)
3 Measuring range
Pressure/Vacuum
Gauge pressure in the vessel does not influence OPTISOUND
3020 C. Low pressure or vacuum, however, damp the
ultrasonic pulses. This influences the measuring result,
particularly if the level is very low. With pressures under -
0.2 bar (-20 kPa) you should use a different measuring
principle, e.g. radar or guided microwave.
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Mounting
4.2 Mounting information
Screwing in
Installation position
Screw OPTISOUND 3020 C into the mounting socket with an
appropriate spanner applied to the hexagon of the process
fitting. Max. torque see chapter "Technical data".
Warning:
The housing must not be used to screw the instrument in!
Applying tightening force to the housing can damage its
internal mechanical components.
When mounting OPTISOUND 3020 C, keep a distance of at
least 200 mm (7.9 in) to the vessel wall. If the sensor is
installed in the center of dished or rounded vessel tops,
multiple echoes can arise. These can, however, be faded out
by an appropriate adjustment (see chapter "Setup").
If this distance cannot be maintained, a false echo storage
should be carried out during setup. This applies particularly if
buildup on the vessel wall is expected. In this case, we
recommend repeating the false echo storage later on with
existing buildup.
2
1
> 200 mm
Fig. 5: Mounting on dished vessel tops
1 Reference plane
2 Vessel center or symmetry axis
In vessels with conical bottom it can be advantageous to
mount the sensor in the center of the vessel, as measurement
is then possible down to the lowest point of the vessel bottom.
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Fig. 6: Vessel with conical bottom
Mounting
Socket
The mounting socket should preferably be dimensioned to
allow the lower edge of the transducer to protrude at least 10
mm out of the socket.
ca. 10 mm
Fig. 7: Recommended socket mounting
If the reflective properties of the medium are good, you can
mount OPTISOUND 3020 C on sockets higher than the
transducer length. You will find recommended values for
socket heights in the following illustration. The socket end
should be smooth and burr-free, if possible also rounded.
Carry out a false echo storage.
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Mounting
Sensor orientation
d
100 mm/4"
h
> 10 mm
150 mm/6"
h
300 mm/12"
400 mm/16"
d
Fig. 8: Deviating socket dimensions
In liquids, direct the sensor as perpendicular as possible to the
product surface to achieve optimum measurement results.
Fig. 9: Orientation in liquids
To reduce the min. distance to the medium, you can also
mount OPTISOUND 3020 C with a beam deflector. By doing
this, it is possible to fill the vessel nearly to maximum. This
arrangement is particularly suitable for open vessels such as e.
g. overflow basins.
~400x400
°
45
~200
Fig. 10: Beam deflector
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