Operating Instructions
VEGASWING 81A, 83A
Level and Pressure
Safety information
Safety information
The described module must only be installed
and operated as described in these operating
instructions. Please note that other action can
cause damage for which VEGA does not take
responsibility.
2 VEGASWING 81A and 83A
Note Ex-area
Please note the approval documents attached
(yellow binder), and especially the included
safety data sheet.
Contents
Contents
Safety information ........................................................................ 2
Note Ex-area ................................................................................ 2
1 Product description
1.1 Function and configuration .................................................. 4
1.2 Approvals ............................................................................. 5
1.3 Technical data ....................................................................... 7
1.4 Dimensions ......................................................................... 11
1.5 Type plate ........................................................................... 15
2 Mounting
2.1 VEGASWING ...................................................................... 16
3 Electrical connection .............................................................. 20
4 Set-up
4.1 Functions table ................................................................... 26
5 Diagnosis
5.1 Recurring test acc. to WHG .............................................. 27
5.2 Replacement of electronics ............................................... 28
5.3 Failure removal ................................................................... 29
VEGASWING 81A and 83A 3
1 Product description
Product description
1.1 Function and configuration
VEGASWING series 80 A vibrating level
switches detect the levels of liquids with a
viscosity between 0,2 mPa s and
10.000 mPa s and densities ³ 0,5 g/cm3.
Their modular design allows them to be used
in vessels, tanks and pipelines. T ypical applications involve overfill and dry run protection.
Thanks to its simple and rugged measuring
system, VEGASWING can be used in almost
any liquid regardless of its chemical and
physical properties. It also works well under
difficultconditions such as turbulence, air
pockets, foam formation, or changes in material, and is insensitive to external vibrations.
VEGASWING with their mechanical connection thread, cone, bolting and flange are also
suitable for level detection of liquids in the
food processing industr y. The tuning fork
and the extension tube are polished for such
applications.
For the use in very aggressive products,
Hastelloy C4 and coatings ECTFE (Halar)
and enamel are used for VEGASWING 81 A
and 83 A.
For product temperatures of more than
100°C up to 150°C, VEGASWING 81 A and
83 A can be equipped with a temperature
adapter.
Function
The tuning fork is piezoelectrically energised
and vibrates at a resonance frequency of
approx. 400 Hz. The resonance frequency
changes when the tuning fork is covered by
the material. This frequency change is detected by the integral oscillator and converted into a switching command.The
switching condition (overfill or dry run protection) can be selected using the mode switch.
The oscillator of VEGASWING continuously
monitors the instrument for the following
faults:
- tuning fork corrosion or damage,
- absence of vibration,
- piezo drive cable malfunction,
- vibrating frequency too low ,
- corrosive medium penetrating the sensor
from the vessel.
With a connected signal conditioning instrument (oscillator SWING E82 Z) in addition
more functions can be monitored. With oscillator SWING E82 Z and appropriate signal
conditioning instrument, the function of the
complete measuring chain can be monitored
at the touch of a button. This is valid according to the general type approval acc. to WHG
as recurring test. More information is provided with the particular signal conditioning
instrument.
Should one of the above-mentioned faults
occur, or the power supply fails, the electr onics react by switching to a defined switching
state, i.e. dependent on the electr onics version
- opening the non-contact switch,
- de-energising the r elay, or
- blocking the output transistor .
With the two-wire output version, the failure is
signalled via a defined current to the connected VEGATOR signal conditioning instrument.
4 VEGASWING 81A and 83A
Product description
Recurring test acc. to WHG
According to the type approval WHG
(Z-65.11-154) the recurring test acc. to WHG
can be carried out by pressing a key on the
VEGATOR 536 EX, 537 EX, 636 EX signal
conditioning instrument. The sensor must not
be removed, nor made to respond by filling
the vessel. This is valid for VEGASWING
81 A EX and 83 A EX with two-wire
SWING E82 Z EX oscillator .
VEGASWING 81 A EX and 83 A EX meet the
fail-safe requirements to class 3 (AK 1 … 3)
acc. of DIN 19 251 in mode A (overfill protection).
Configuration
A measuring system consists of:
- a VEGASWING with SWING E82 C,
SWING E82 R or SWING E82 T oscillator
- external instruments, switched by VEGASWING
or
- a VEGASWING with SWING E82 Z or
SWING E82 Z EX oscillator
- VEGATOR 536 EX, 537 EX or 636 EX signal
conditioning instrument or an already
mounted instrument, e.g. VEGA TOR
425 EX, 534 EX, 825 EX
- external instruments switched by VEGATOR.
1.2 Approvals
Explosion protection
Only certified VEGASWING 81A EX0, 83A
EX0 vibrating level switches should be used
in hazardous areas caused by combustible
gases, vapours or fog, . VEGASWING
81A EX0, 83A EX0 are suitable for use in
hazardous areas zone 1 and zone 0.
The EU-type approval issued by the approval authority is attached to the instruments
as proof of explosion protection. Ex-mounting
regulations should be noted when VEGASWING 81A EX0, 83A EX0 vibrating level
switches are mounted and operated in hazardous areas. The information and conditions
of the supplied certificates (EU-type approval, conformity certificate) for VEGASWING 81A EX0, 83A EX0 as well as the
appropriate electrical equipment (VEGA TOR
signal conditioning instrument, separator ,
safety barrier) must be taken into account.
• The mounting of Ex-systems must always
be carried out by skilled staff.
• VEGASWING 81A EX0, 83A EX0 must be
powered by an intrinsically safe circuit; the
permissible electrical values are stated in
the appropriate Ex-type approval certificate.
• VEGASWING 81A EX0, 83A EX0 with
enamelled tuning fork or plastic parts acquiring static electricity have a warning
label stating the measures to be taken to
avoid dangers due to electrostatic discharges. The contents of the warning label
should be noted.
• The explosion protection of the electrical
equipment used is only ensured when the
limit temperatures stated in the certificate
are not exceeded.
• In the case of dangers due to oscillation
and vibrations, the appropriate parts of
VEGASWING 83A EX0 should be secured
effectively against these dangers.
VEGASWING 81A and 83A 5
Product description
Overfill protection
The information and conditions of the supplied general type approvals must be noted
when a VEGASWING is used as part of an
overfill protection for vessels storing water endangered liquids. The general type approval should be available at the place of
installation place.
VEGASWING should only be used in liquids
against which the materials of the wetted
parts of VEGASWING are sufficiently chemically resistant.
Overfill protection according to WHG
Level detection with fault monitoring
Instrument Oscillator VEGATOR Test certificate no.
VEGASWING SWING E82Z EX 536 EX, Z-65.11-154
81A EX, 83A EX 537 EX
VEGASWING SWING E82 C Compact instrument Z-65.11-163
81A and 83A SWING E82 R
(C, R, T) SWING E82 T
DruckbehV (pressure vessel regulations)
VEGASWING was tested acc. to TRB 801 no.
45 on its suitability for use in pressurized
vessels (DruckbehV).
level switch
636 EX
Level measuring instruments for use in hazardous areas
Level detection with fault monitoring
Instrument EU-type approval VEGATOR Conformity
VEGASWING TÜV 98 ATEX 1320 X 536 EX PTB no. Ex 95.D.2065 X
81A EX, 83A EX 537 EX PTB no. Ex 95.D.2073 X
with 636 EX PTB no. Ex 96.D.2068
oscillator
SWING E82Z EX
VEGATOR 425 EX, 534 EX and 825 EX signal conditioning instruments meet the r equired
connection values and can also be used.
6 VEGASWING 81A and 83A
certificate level certificate
switch
Product description
1.3 T echnical data
VEGASWING 81A and 83A
Housing
Housing material plastic PBT (Polyester) or
Protection
- plastic housing IP 66
- aluminium housing IP 66 and IP 67 (meets both categories)
Cable entry 1 M20x1,5 unit
Terminals max. 1 x 1,5 mm2 cable cross-section
Mechanical connection
Thread G 1 A or 1“ NPT
- material 1.4571 (stst) or Hastelloy C4
Flanges DIN and ANSI from DN 32
- material 1.4571, 1.4571 plated with Hastelloy C4
Hygienic fittings
Material 1.4571
- cone DN 25
- bolting DN 40, DN 50
- Tri-Clamp 11/2“, 2“
- Tuchenhagen Varivent DN 50 PN 10
- hyg. connection with compression nut F40 PN 25, 14571, 14581
- hyg. connection with tension flange DN 32 PN 25, 1.4571, 1.4581
aluminium (plastic-coated)
(SWING E82 R: 2 M20x1,5 units)
DN 50 PN 40 enamelled steel
or 1.4571 ECTFE-coated
Tuning fork
Material 1.4581, Hastelloy C4, Hastelloy C4 enamelled
Extension tube (VEGASWING 83 A)
Material 1.4571, Hastelloy C4, Hastelloy C4 enamelled
Length
- 1.4571, Hastelloy C4 140 mm … 4000 mm
- Hastelloy C4 enamelled 140 mm … 1200 mm
- 1.4571, ECTFE (Halar) 140 mm … 1600 mm
Weight
Plastic housing approx. 1,5 kg
Tube extension (VEGASWING 83A) approx. 0,11 kg/m
VEGASWING 81A and 83A 7
1.4581 with ECTFE coating
1.4571 with ECTFE coating
Product description
Ambient conditions
1)
Ambient temperature on housing -40°C … +70°C
Storage and transport temperature -40°C … +70°C
Product temperature -40°C … +100°C
short-term (30 min.) also over 100°C
(max. 150°C) only valid for instrum ents without
approval.
Product temperature with 1.4571
temperature adapter (optional) -40°C … +150°C
'
'
'
Permissible ambient
temperature
Operating pressure
'
1)
Operating pressure -1 bar to 40 bar
(with locking ARV2EX0.C…
up to 25 bar , other lockings un pressurised)
With flange versions note nominal pressure
of the flange.
Product
Viscosity
- dynamic 0,2 … 10.000 mNs/m² (or cSt)
- cineatic 0,2 … 10.000 mNs/m² (or cP) relating to
Density 0,5 … 2,5 g/cm
density 1
3
0,5 … 0,7 g/cm3 must be readjusted
(factory setting 1,0)
Product temperature
with temperature
adapter
Function
Mode A/B-modes in oscillator or definition via the
signal conditioning instrument (SWING E82Z)
A: max. detection, overfill protection
B: min. dete ction, dry run protection
Integration time approx. 0,5 s
Meas. frequency approx. 400 Hz
Hysteresis approx. 4 mm with vertical installation
Signal lamp
- SWING E82 C, R, T LED for indication of switching condition
- SWING E82Z, SWING E82Z EX LED lights when tuning fork covered
CE-conformity
VEGASWING 81 A and 83 A vibrating level switches meet the protective regulations of
EMC (89/336/EWG) and NSR (73/23/EWG). Conformity has been judged acc. to the following standards:
EMC Emission EN 50 081 -1: 1992
Susceptibility EN 50 082 -2: 1995
NSR EN 61 010 -1: 1993
1)
Note the information of the conformity certificate or the EU-type approval certificate.
8 VEGASWING 81A and 83A
Product description
Approvals VEGASWING 80 A
WHG
Approval as overfill protection acc. to WHG
Ambient temperature on the housing -40°C … +70°C
Product temperature -40°C … +100°C
- test report Z-65.11-154 VEGASWING 81A EX/83A EX with oscillator
- test report Z-65.11-163 VEGASWING 81A EX / 83A EX with oscillator
- with temperature adapter up to 150°C
Operating pressure max. 40 bar
Recurring test acc. to WHG
According to the type approval to WHG (Z-65.11-154) the recurring test acc. to WHG can
be carried out by pr essing the test key on the VEGA TOR 536 EX, 537 EX, 636 EX signal
conditioning instrument. The sensor must not be removed, nor can a response be triggered by filling the vessel. This is valid for VEGASWING 81 A EX and 83 A EX with two-wire
oscillator SWING E82 Z EX.
Explosion protection VEGASWING 81A EX0, 83A EX0
Certificate EU-type approval certificate acc. to ATEX 100 a
Classification mark II 1 G EEx ia IIC T6
Permissible application range Ex Zone 1, Ex Zone 0
Ambient temperature dependent on temperature class and Ex-Zone:
see EU-type approval certificate
Electrical safety characteristics:
see EU-type approval certificate
SWING E82Z EX and suitable signal
conditioning instrument
SWING E82 C, R, T
TÜV 98 ATEX 1320 X
Oscillators
C - Non-contact switch (SWING E82 C)
Supply voltage 20 … 250 V AC, 50/60 Hz or 20 … 250 V DC
Output non-contact switch
Current consumption approx. 3 mA (via the load circuit)
Load current min. 10 mA
Protection class I
Overvoltage category III
Modes A: max. level detection, overfill protection
VEGASWING 81A and 83A 9
max. 400 mA (at I > 300 mA the ambient
temperature can be max. 60°C)
max. 4 A to 40 ms (not WHG specified)
B: min. level detection, dry run protection
Product description
R - Relay output (SWING E82 R)
Supply voltage 20 … 250 V AC, 50/60 Hz or 20 … 72 V DC
(at U > 60 V DC the ambient temperature can
be max. 50°C)
Power consumption 1 … 9 VA AC, max. 1,5 W DC
Output relay output (DPDT), 2 floating spdt
Relay data
- potential separation min. 500 V DC
- contact material AgCdO and Au-plated
- turn-on voltage min. 10 mV
max. 250 V AC, 250 V DC
- switching current min. 10 µA
max. 5 A AC, 1 A DC
- breaking capacity max. 750 VA AC, 54 W DC‘
Protection class I
Overvoltage category II
Modes A: max. level detection, overflow protection,
overfill protection
B: min. level detection, dry run protection
T - Transistor output (SWING E82 T)
Supply voltage 10 … 55 V DC
Power consumption max. 0,5 W
Output floating transistor output
overload and permanently short-circuit proof
Load current max. 400 mA
Voltage loss max. 1 V
Turn-on voltage max. 55 V DC
Blocking current < 10 µA
Protection class II
Overvoltage category III
Modes A: max. detection, overflow protection,
overfill protection
B: min. detection, dry run protection
Z - Two-wire output (SWING E82Z)
Supply voltage 12 … 36 V DC (via VEGA-signal conditioning
instrument)
Output two-wire output
Required signal conditioning instrument VEGATOR 536 EX, 537 EX, 636 EX,
VEGALOG 571
Current consumption
- tuning fork free approx. 8 mA
- tuning fork covered approx. 16 mA
- fault signal > 22 mA
Protection class II
Overvoltage category III
Modes definition via signal conditioning instrument
10 VEGASWING 81A and 83A
VEGASWING 81A and 83A 11
75
85
VEGASWING 81A EX
Product description
1.4 Dimensions
Thread
G 1 A or 1" NPT
20
129
100
30,5
Ø 60
Ø 29
25
SW 41
Cone DN 25
116 55
25
Ø 55
Ø 80
Ø 29
90
Ø 44
Ø 35,1
Ø 38,1
Ø 29
1
/2"
TRI-Clamp 1
119 30
21,5
Temperature adapter made of
1.4571 (optional)
Ø 41
TRI-Clamp 2"
Ø 29
119 30
21,5
Ø 47,8
Ø 50,8
50
Bolting
DN 40/50, DIN 11 851
31
Ø 29
117
1
/
Rd 65x
6
33
Ø 38
Ø 43
1
/
Rd 78x
6
35
Ø 50
Ø 55
Switching point
12 VEGASWING 81A and 83A
75
85
90
Temperature adapter made of
1.4571 (optional)
Ø 44
50
VEGASWING 81A EX
Tuchenhagen
Varivent
58
117
100
40
Rd 65x
Ø 79,6
Compression nut
F40 PN 25
Tension flange
F32 PN 25
Ø 41
Enamelled flange
DN 50
Flange DN 50
40
Ø 29
120
Ø 90
Ø 72/6xM6
Ø 29
Ø 29
120 29
120 40
Ø 29
117 58
25
1
/
6
Ø 31
Switching point
Product description
40
Ø 79,6
VEGASWING 81A and 83A 13
75
85
VEGASWING 83A EX
Product description
Thread G 1 A or
1“ NPT
20
L (min. 180, max. 4.000 mm)
100
30,5
Ø 60
Ø 29
25
SW 41
90
Ø 44
Cone PN 25
55
Ø 29
L (min. 180, max. 4.000 mm)
25
Ø 55
Ø 80
Ø 35,1
Ø 38,1
Ø 29
1
/2“
Tri-Clamp 1
30
L (min. 180, max. 4.000 mm)
21,5
Temperature adapter made
of 1.4571 (optional)
50
Ø 41
Tri-Clamp 2“
30
Ø 29
L (min. 180, max. 4.000 mm)
21,5
Ø 47,8
Ø 50,8
Bolting DN40/50 DIN
11851
31
Ø 29
L (min. 180, max. 4.000 mm)
Switching
point
Rd 65 x 1/6
33
Ø 38
Ø 43
35
Rd 78 x 1/6
Ø 50
Ø 55
Locking for height adjust-
ment up to 25 bar
½
½
Temperature adapter made
of 1.4571 (optional)
Ø
VEGASWING 83A EX
Compression nut
Locking for height
adjustment
½
½
F40 PN 25
Ø
Ø
Tension flange
F32 PN 25
Ø
Ø
Ø
Ø
Tuchenhagen
Varivent
Ø
Ø
Flange DN 50
Ø
Enamelled flange
DN 50
Ø
Product description
1.5 T ype plate
Please check that the correct instrument is
being used before mounting and electrical
connection. Note the type plate which is located as follows:
Type plate
The type plate contains important data required for mounting and connection. The
layout and the parts of the type plate are
explained in the following example.
Layout of the type plate (example)
®
1
2
3
4
SWING 8. AEX
type: SWING8.AEX0...
electronic: SWING E82Z EX
TÜV 98ATEX .... II 1G EEx ia IIC T6
techn. data see document./certificates
PN: see flange, max. 40bar
IP66/67 length: ... mm
Ord. no. 123456/000
®
D-77757 Schiltach
Z-65.13.XXX
ser.no.
6
XXXXXXXX
0032
1998
1 Order no. master data
2 Ex-certification number
Explosion protected version - note the
information and conditions in the certificate
3 Electronics data / Approvals
4 No. of the order confirmation/Pos. no.
5 Serial number
6 Test mark when used as par t of an over fill
protection for vessels storing water -endan-
gering liquids - note the information and
conditions of the general type approval
7 Year of manufactur e
8 CE test authority no.
8
7
5
Order code
Detailed information on the order code is
provided in the "Product Information Vibration“ or in the "VEGA pricelist “.
VEGASWING 81A and 83A 15
2 Mounting
Mounting
2.1 VEGASWING
In principle, VEGASWING can be mounted in
any position. The instrument must be
mounted such that the tuning fork is at the
height of the required switching point. Note
the following installation instructions:
Transport
Do not hold VEGASWING by the tuning fork
as particularly with flange or tube versions,
the tuning fork can be damaged by the instrument’s weight. Transport enamelled and
ECTFE-coated instruments very carefully and
avoid touching the tuning fork.
Switching point
The tuning fork is provided with lateral markings (notches) marking the switching point
with vertical installation for the medium water.
When installing VEGASWING note that the
marking is at the required height. Note that
the switching point of the instrument shifts
when the medium has a density differing from
water (water = 1,0 g/cm3). The switching
point can be adapted using a potentiometer
to set it to the marking (notch). With the adjustment 1,0 g/cm3 a switching point from a
density of > 0,7 g/cm3 is ensured. For products with a density < 0,7 g/cm3 the potentiometer must be readjusted on the SWING
E82 C, R, T oscillator as follows: 0,5 … 1,5 g/
cm3, oscillator SWING E82 Z: 0,5 … 1,0 g/cm
(see fig. 2.1).
Vertical installation
from top, from bottom
Switching point
with low density
Switching
point
approx.
25 mm
Switching point
higher density
Horizontal installation
Switching point
Recommended installation position for adhesive products:
Top marking
Switching
point
approx.
15 mm
3
Adhesive products
In the case of horizontal mounting in adhesive
and viscous products, the surfaces of the
tuning fork should be vertical to reduce buildup on the tuning fork (see fig. 2.2). The position of the tuning fork is marked by a notch
on the hexagon of VEGASWING. Therefore
you can check the position of the tuning fork
when screwing in. When the hexagon is on
the seal, the thread can be still turned by
approx. half a turn. This is sufficient to reach
the recommended installation position.
Switching
point
75 mm
Fig. 2.1
Fig. 2.2
16 VEGASWING 81A and 83A
Mounting
In the case of adhesive and viscous products, the tuning fork should protrude into the
vessel to avoid build-up. Sockets for flanges
and mounting bosses should not exceed a
certain length. For flange versions, the socket
should have a length of max. 40 mm, for
threads max. 30 mm, see also Mounting
boss.
Pressure
In the case of gauge or low pressure in the
vessel, the mounting boss must be sealed on
the thread. Cover the thr ead with Teflon tape,
hemp or something similar , or use a suf ficiently resistant seal ring.
Vibrations
Extreme vibrations and shocks, e.g. by stir rers and turbulence in the vessel, can cause
resonance vibrations in the extension tube of
VEGASWING 83 A. This causes increased
wear on the upper weld joint.
Provide an appropriate fixing or fastening
directly above the tuning fork to fasten the
extension tube (see fig. 2.3).
This is mainly valid for applications in
Ex-area category 1G or WHG. Note
that the tube will not be bent by this
measure.
Stirrers
The level switch can be subjected to strong
lateral forces by stirrers etc. Therefore do not
choose too long an extension tube for
VEGASWING 83 A, but check whether it is
possible to mount a VEGASWING 81 A level
switch laterally in a horizontal position.
Cable entries
Use cable with a circular conductor crosssection and tighten the cable entr y. The cable
entry is suitable for cable diameters of 4 mm
to 12 mm.
Two seal rings ar e attached to the instrument:
- for cable diameters of 4 … 9 mm
- for cable diameters of 5 … 12 mm.
Careful sealing of the cable entry is very
important when mounting outdoors, in humid
areas (e.g. for cleaning processes) or on
cooled or heated vessels (see fig. 2.4).
Humidity
Turn the cable entr y of horizontally mounted
instruments to the bottom to avoid humidity
ingress. The plastic housing can be rotated
by approx. 330 °. On vertically installed instruments loop the connection cable to the
instrument housing to the bottom, so that rain
or condensation can drain off. This is mainly
important when mounting outdoors, in humid
areas (e.g. for cleaning processes) or on
cooled or heated vessels (see fig. 2.4). When
lowering the housing cover checkthat the
transparent light guide (inspection glass) is
above the LED. When the housing cover is
lowered in the wr ong way, the switching point
of the sensor is no longer visible from outside
and the housing will not be perfectly sealed.
Fig. 2.3
VEGASWING 81A and 83A 17
Fig. 2.4
Mounting
Lockings
A locking is available for height adjustment on
the VEGASWING 83 A with screw connection.
This locking allows adjustment and modification of the switching point after installation.
Bring the switching point of the tuning fork to
the requireded height. Lock the tube in this
position by tightening the pr essure scr ew.
Secure the pressure screw against loosening
with the fixing screw.
You can use VEGASWING 83 A in vessels
with up to 25 bar pressure. Use the locking
(G 11/2 A, 11/2“ NPT) up to 25 bar
(ARV2EX0.C…). Follow the operating instructions for the locking.
Lateral load
Ensure that the vibrating element is not subjected to lateral forces. Mount the instrument
at a location in the vessels wher e no interfering influences such as those caused by
stirrers, filling openings etc. can occur . This is
particularly important for instrument types
with cables or extension tubes (see fig. 2.5).
The surfaces of the tuning fork should be
parallel to the product movement, so that the
tuning fork of VEGASWING offers only little
resistance.
Fig. 2.5
VEGASWING with enamel or ECTFE
Treat instruments with enamel or ECTFEcoating very carefully and avoid shocks.
Unpack VEGASWING just before mounting.
Insert VEGASWING carefully into the vessel
opening provided and avoid contact with
sharp-edged vessel parts.
Flow
(e.g. in pipes)
When mounting in pipes or in vessels with
certain flow direction, you should mount
VEGASWING such that the surfaces of the
tuning fork follow the flow direction, see also
"Welded socket“.
18 VEGASWING 81A and 83A
Mounting
VEGASWING’s thread start is defined. This
means that each VEGASWING is in the same
position after screwing in. Therefore remove
the supplied seal from the thread of VEGASWING. This seal is not required when using a
welded socket. Screw VEGASWING into the
welded socket.
You can deter mine the subsequent position
of VEGASWING before welding (see fig. 2.2).
Mark the appropriate position of the welded
socket. Before welding unscrew VEGASWING and remove the rubber ring from the
welded socket.
An optional welded socket is available which
is already provided with a marking. Weld this
welded socket with the marking facing upwards (see fig. 2.6).
Marking
Fig. 2.6
Installation examplesWelded socket
Mounting not
suitable for
adhesive products
Fig. 2.7
VEGASWING 81A and 83A 19
3 Electrical connection
Danger
Note
Note
Overvoltage protection
•
• °
“
•
•
•
Non-contact switch (SWING E82 C)
–
–
…
…
Floating relay output (SWING E82 R)
… …
T wo-wire output (SWING E82 Z)
…
Floating transistor output
(SWING E82 T)
Connection examples
…
Control of alternating current loads
…
Note
4 Set-up
Indicating and adjustment elements
“
“
Note
Switching point adaptation
“
Set-up
Fault monitoring
VEGASWING’s oscillator continuously monitors the instrument for the following faults:
- tuning fork corrosion or damage
- absence of vibration
- line break for vibration actuation
- vibrating frequency too low
- corrosive medium penetrating the sensor
from the vessel side.
More functions can be monitored. The correct
functioning of the complete measurement
chain canbe monitored at the touch of a button when the SWING E82 Z oscillator is used
in conjunction with an appropriate signal
conditioning instrument.
VEGASWING 81A and 83A 25
4.1 Functions table
Mode A
Mode B
Level Switching condition Control Current Control Control
SWING SWING SWING lamp consump. lamp lamp
E82 C
1)
E82 R
1)
E82 T VEGA- SWING VEGA- VEGA-
SWING E82 Z SWING TOR
Failure of
the voltage
supply(mode
A/B)
Failure
Note:
Diagnosis
5 Diagnosis
5.1 Recurring test acc. to WHG
The implementation of the recurring test acc.
to WHG is stated in the general type approval no. Z-65.11-154 or Z-65.11-163, see
paragraph 8 of the certificate.
Note these approvals when VEGASWING
81A and 83A are used as part of an overfill
protection acc. to WHG.
VEGASWING 81A EX and 83A EX with VEGATOR 536 EX, 537 EX, 636 EX signal conditioning instruments meet the requirements
acc. to AK 3 in mode A (overfill protection).
Recurring test acc. to WHG
According to the type approval to acc. WHG
(no. Z-65.11-154) the recurring test can be
carried out by pushing the test key on the
VEGATOR 536 EX, 537 EX, 636 EX signal
conditioning instrument. The sensor must not
be removed, nor made to respond by filling
the vessel. This is valid for VEGASWING
81A EX and 83A EX with two-wire SWING
E82 Z EX oscillator.
With the current values provided you can
carry out the function test also directly via a
PLC or a processing system.
The implementation and the switching sequence of the function test are stated under
"Test key“ and the following table in the oper ating instructions of the appropriate VEGATOR signal conditioning instrument.
Test key
For setting-up meassuring instruments in
conjunction with the two-wire oscillator
(SWING E82Z EX) a function test can be
carried out. The VEGA TOR signal conditioning instrument has an integral test
keylowered into the front plate. Push the test
key with a suitable object (scr ewdriver, pen
etc.). When pushing the key , the system is
checked according to the following criteria:
- switching function of the switching outputs
- switching function of the failure outputs
- potential separation of the outputs
- signal processing of the signal conditioning
instrument.
After pushing the test key , the complete
measuring system will be checked for cor rect function. During the test the following
operating conditions are simulated:
- fault signal
- empty signal
- full signal.
Check that all three switching conditions
occur in the correct sequence and for the
stated duration. If this is not the case, there is
a failure in the measuring system (see "5.2
Failure removal“ in the operating instructions
of the signal conditioning instrument). Note
that the connected instruments are activated
during the function test. Thus you can check
the correct function of the measuring system.
Thanks to this fault monitoring, the combination of the following instruments corresponds
to classes 1 to 3 (AK 3) acc. to DIN 19 251.
AK 3 means that the system is fail safe.
- VEGASWING 81A EX, 83A EX
- SWING E82Z EX oscillator
- VEGATOR 536 EX, 537 EX and 636 EX
signal conditioning instrument
VEGASWING 81A and 83A 27
Diagnosis
Test procedure A-mode B-mode
1 Simulation of a fault signal ( approx. 3 s after release of key )
Level relay deenergized > 22 mA
Failure relay deenergized < 2,2 mA
1)
2)
2)
2 Simulation of an empty signal (approx. 1,5 s)
Level relay energized 8 mA
2)
Failure relay energized
3 Simulation of a full signal (approx. 1,5 s)
Level relay deenergized 16 mA
2)
Failure relay energized
4 Return to the actual operating condition (covered/uncovered)
1)
as long as the key is pushed, the instrument signals failure.
2)
VEGASWING state
With the provided current values, you can also carry out the function test directly via a PLC or
a processing system.
5.2 Replacement of electronics
• Connect the connection cables again and
switch on the voltage supply .
• Interrupt the voltage supply and disconnect the connection cables and the switching current circuit on the switching cabinet.
• Make sure that there is no Ex-atmosphere.
• Loosen the four screws of the housing
cover with a screwdriver and remove the
cover.
• Disconnect the connection cables on the
oscillator.
• Remove the old oscillator and insert the
new one.
The sensor is immediately ready for operation.
• Replace the housing cover and tighten the
screws.
Note when replacing the housing cover
that the transparent light guide (inspection
glass) is above the LED. When the housing
cover is not r eplaced correctly, the switching condition of the sensor is no longer
visible and the housing is not sealed
optimally.
• Set the A/B-switch to the same position as
on the old oscillator (not with SWING
E82 Z).
• Set the potentiometer for the density adjustment of the new electronics to the same
value as on the old oscillator.
28 VEGASWING 81A and 83A
5.3 Failure removal
Failure Measure, failure removal
W
…
Diagnosis
b.Current value > 22 mA
- Check all connections and the connection cable to the sensor .
- Should the red failure lamp still light, separate the sensor from the
connection line and connect a resistor of 1 kW instead.
If the failure lamp goes out, the sensor is defective. Check the connected sensor.
- Should the failur e lamp still light, r econnect the sensor. Separate the
signal conditioning instrument from the connection cable and connect
a resistor of 1 kW to the sensor input.
- If the failure lamp still lights, the signal conditioning instrument is defective. In this case r eturn the instrument to VEGA for r epair.
- If the failure lamp goes out, there is probably a short-circuit in the
connection cable. Check the connection cable to the sensor .
Malfunction during After pushing the test key , the switching conditions do not occur in the
function test correct sequence or for the correct period, e.g. there is no full signal
provided.
- Measure cable resistance
When the line is high-resistance, you must take appropriate measures to reach a standard resistance. E.g. check the terminals and
cable connections for corrosion.
30 VEGASWING 81A and 83A
Notes
VEGASWING 81A and 83A 31
VEGA Grieshaber KG
Am Hohenstein 113
D-77761 Schiltach
Phone (0 78 36) 50 - 0
Fax (0 78 36) 50 - 201
e-mail: info@vega-g.de
ISO 9001
The statements on types, application, use and operating conditions
of the sensors and processing systems correspond to the actual
knowledge at the date of printing.
Technical data subject to alteration.
2.13 719 / July ’99
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