Operating Instructions
VEGAVIB 65
with two-wire 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 information for Ex areas.............
2.7 Manufacturer declaration .................
2.8 Environmental instructions ................
3 Product description
3.1 Configuration..........................
3.2 Principle of operation ....................
3.3 Adjustment ...........................
3.4 Storage and transport ...................
4 Mounting
4.1 General..............................
4.2 Mounting information ....................
4
4
4
5
5
5
5
6
6
6
7
8
8
9
10
11
12
5 Connecting to power supply
5.1 Preparing the connection .................
5.2 Connection steps.......................
5.3 Wiring plans, single chamber housing ........
5.4 Wiring plans, version IP 66/IP 68, 1 bar ......
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 Fault rectification .......................
7.3 Exchange of the electronics ...............
7.4 Instrument repair .......................
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8 Dismounting
8.1 Dismounting procedure ..................
8.2 Disposal .............................
9 Supplement
9.1 Technical data.........................
9.2 Dimensions ...........................
9.3 Industrial property rights..................
Contents
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39
Supplementary operating instructions manuals
Information:
VEGAVIB 65 is available in different versions. Depending on
the selected version, supplementary operating instructions
manuals will also be included in the delivery. 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 VEGAVIB 65,
VEGA offers accessories and replacement parts. The asso-
ciated documents are:
l Operating instructions manual "Remote housing - VEGA-
VIB"
l Operating instructions manual "Oscillator VEGAVIB series
60"
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VEGAVIB 65 - with two-wire 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.
4 VEGAVIB 65 - with two-wire output
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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
VEGAVIB 65 is a sensor for level detection.
Detailed information on the application range of VEGAVIB 65
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
VEGAVIB 65 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
VEGAVIB 65 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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VEGAVIB 65 - with two-wire output 5
For your safety
2.6 SIL conformity
VEGAVIB 65 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) VEGAVIB series 60".
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.
2.8 Manufacturer declaration
In conformity with DIN EN 60079-14/2004, para. 5.2.3, point
c1, the VEGAVIB 65 level sensor is suitable for use in zone 2.
The operator must use the instrument as it was intended to be
used and follow the specifications of the following documents:
l this operating instructions manual
l this manufacturer declaration (24648)
l the corresponding installation regulations
Max. increase of the surface temperature during operation:
40 K (individual components in the instrument)
With an ambient temperature of 70 °C (158 °F) on the housing
and a process temperature of 70 °C (158 °F), the max. ambient
temperature during operation is 110 °C (230 °F).
Measures for maintaining explosion protection during operation:
l Operate the instrument in the range of the specified
electrical limit values. Permissible supply voltage: see
"Technical data"
l Mount and operate the instrument in such a way that no
ignition danger is expected by electrostatic charges. The
process fitting, the plastic-coated/covered probe part or the
housing are made of electrically non-conductive plastic
(depending on the version).
l Make sure that the seal is mounted correctly between the
lower part of the housing and the cover. Screw the cover
on tightly.
l Make sure there is no explosive atmosphere present if you
want to operate the instrument with opened cover
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6 VEGAVIB 65 - with two-wire output
For your safety
l Make sure that the cable gland is tight and strain-relieved.
The outer diameter of the connection cable must be
adapted to the cable gland. Tighten the pressure screw of
the cable gland carefully.
l Cover unused openings for cable glands tightly
l Mount the instrument in such a way that the sensor cannot
touch the vessel wall or vessel installations. Keep in mind
the influence of product movement in the vessel.
l The surface temperature of the housing must not exceed
the ignition temperature of the surrounding explosive
atmosphere
This instrument was assessed by a person who fulfils the DIN
EN 60079-14 requirements.
2.9 Environmental instructions
Protection of the environment is one of our most important
duties. That is why we have introduced an environment
management system with the goal of continuously improving
company environmental protection. The environment management system is certified according to DIN EN ISO 14001.
Please help us fulfil this obligation by observing the environmental instructions in this manual:
l Chapter "Storage and transport"
l Chapter "Disposal"
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Product description
3 Product description
3.1 Configuration
Scope of delivery
Components
The scope of delivery encompasses:
l VEGAVIB 65 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
VEGAVIB 65 consists of the following components:
l Housing cover
l Housing with electronics
l process fitting with tuning fork
1
2
3
Fig. 1: VEGAVIB 65 with plastic housing
1 Housing cover
2 Housing with electronics
3 Process fitting
3.2 Principle of operation
Area of application
8 VEGAVIB 65 - with two-wire output
VEGAVIB 65 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, VEGAVIB 65 is
virtually unaffected by the chemical and physical properties of
the solid.
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Product description
It functions even when exposed to strong external vibration or
changing products.
Solid detection in water
If VEGAVIB 65 was ordered for solid detection in water, the
tuning fork is to the density of water. In air or if covered by
water (density: 1 g/cm³/0.036 lbs/in) VEGAVIB 65 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 VEGAVIB 65 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.
Depending on your requirements, VEGAVIB 65 with two-wire
electronics can be connected to different signal conditioning
instruments. Compatible signal conditioning instruments are
listed under "Technical data".
The exact range of the supply voltage is also specified in the
"Technical data" in the "Supplement".
3.3 Adjustment
With the factory setting, products with a density of >0.02 g/cm³
(>0.0008 lbs/in³) can be measured. It is possible to adapt the
instrument for 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 (green/
red)
l potentiometer for adaptation to the product density
l mode switch for selection of the output current
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Product description
3.4 Storage and transport
Packaging
Storage and transport tem-
perature
Your instrument was protected by packaging during transport.
Its capacity to handle normals loads during transport is
assured by a test acc. 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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4 Mounting
4.1 General
Mounting
Switching point
Moisture
Transport
In general, VEGAVIB 65 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 VEGAVIB 65 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
Do not hold VEGAVIB 65 on the vibrating element. E specially
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.
Handling
The vibrating level switch is a measuring instrument and must
be treated accordingly. Bending the vibrating element will
destroy the instrument.
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Mounting
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 information
Socket
Filling opening
Horizontal installation
The vibrating element should protrude into the vessel to avoid
buildup. For that reason, avoid using mounting bosses for
flanges and screwed fittings. This is mainly applicable for
adhesive products.
Install the instrument in such a way that the tuning fork does
not protrude directly into the filling stream. Should such an
installation location be necessary, mount a suitable baffle
above or in front of the tuning fork.
If such an installation location should be necessary, mount a
suitable protective sheet above or in front of the vibrating
element - see illustration a.).
In abrasive solids, mounting according to illustration b. has
proven. A spout forms in the concave protective sheet
preventing wear of the protective sheet.
To achieve a very precise switching point, you can install
VEGAVIB 65 horizontally. However, if the switching point can
have a tolerance of a few centimeters, we recommend
mounting VEGAVIB 65 approx. 20° inclined to the vessel
bottom to avoid buildup.
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