Vega VEGABAR 86 User manual

Operating Instructions
Submersible pressure transmitter with
ceramic measuring cell
VEGABAR 86
4 … 20 mA/HART
Document ID: 45039

2
Contents
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
Contents
1 About this document ............................................................................................................... 4
1.1 Function ........................................................................................................................... 4
1.2 Target group ..................................................................................................................... 4
1.3 Symbols used................................................................................................................... 4
2 For your safety ......................................................................................................................... 5
2.1 Authorised personnel ....................................................................................................... 5
2.2 Appropriate use................................................................................................................ 5
2.3 Warning about incorrect use............................................................................................. 5
2.4 General safety instructions............................................................................................... 5
2.5 EU conformity................................................................................................................... 6
2.6 Permissible process pressure .......................................................................................... 6
2.7 NAMUR recommendations .............................................................................................. 6
2.8 Installation and operation in the USA and Canada ........................................................... 6
2.9 Environmental instructions ............................................................................................... 6
3 Product description ................................................................................................................. 8
3.1 Conguration.................................................................................................................... 8
3.2 Principle of operation........................................................................................................ 9
3.3 Packaging, transport and storage................................................................................... 11
3.4 Accessories and replacement parts ............................................................................... 12
4 Mounting................................................................................................................................. 15
4.1 General instructions ....................................................................................................... 15
4.2 Ventilation and pressure compensation.......................................................................... 17
4.3 Level measurement........................................................................................................ 19
4.4 External housing ............................................................................................................ 20
5 Connecting to power supply................................................................................................. 21
5.1 Preparing the connection ............................................................................................... 21
5.2 Connecting..................................................................................................................... 22
5.3 Single chamber housing................................................................................................. 23
5.4 Double chamber housing ............................................................................................... 24
5.5 Ex-d-ia double chamber housing.................................................................................... 26
5.6 Double chamber housing with VEGADIS-Adapter.......................................................... 27
5.7 Housing IP 66/IP 68 (1 bar) ............................................................................................ 28
5.8 External housing ............................................................................................................ 28
5.9 Connection example ...................................................................................................... 30
5.10 Switch-on phase............................................................................................................. 30
6 Set up with the display and adjustment module ................................................................ 31
6.1 Insert display and adjustment module............................................................................ 31
6.2 Adjustment system......................................................................................................... 32
6.3 Measured value indication.............................................................................................. 33
6.4 Parameter adjustment - Quick setup .............................................................................. 34
6.5 Parameter adjustment - Extended adjustment................................................................ 34
6.6 Saving the parameterisation data................................................................................... 47
7 Setup with PACTware............................................................................................................. 48
7.1 Connect the PC.............................................................................................................. 48
7.2 Parameter adjustment .................................................................................................... 48
7.3 Saving the parameterisation data................................................................................... 50

3
Contents
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
8 Set up with other systems .................................................................................................... 51
8.1 DD adjustment programs ............................................................................................... 51
8.2 Field Communicator 375, 475 ........................................................................................ 51
9 Diagnosis, asset management and service ........................................................................ 52
9.1 Maintenance .................................................................................................................. 52
9.2 Diagnosis memory ......................................................................................................... 52
9.3 Asset Management function........................................................................................... 53
9.4 Rectify faults................................................................................................................... 56
9.5 Exchange process module on version IP 68 (25 bar) ..................................................... 57
9.6 Exchanging the electronics module................................................................................ 58
9.7 Software update ............................................................................................................. 58
9.8 How to proceed if a repair is necessary.......................................................................... 59
10 Dismount................................................................................................................................. 60
10.1 Dismounting steps.......................................................................................................... 60
10.2 Disposal ......................................................................................................................... 60
11 Supplement ............................................................................................................................ 61
11.1 Technical data ................................................................................................................ 61
11.2 Calculation of the total deviation..................................................................................... 73
11.3 Practical example........................................................................................................... 73
11.4 Dimensions .................................................................................................................... 76
11.5 Industrial property rights................................................................................................. 87
11.6 Trademark ...................................................................................................................... 87
Safety instructions for Ex areas
TakenoteoftheExspecicsafetyinstructionsforExapplications.
These instructions are attached as documents to each instrument
with Ex approval and are part of the operating instructions manual.
Editing status: 2018-05-22

4
1 About this document
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
1 About this document
1.1 Function
This operating instructions manual provides all the information
you need for mounting, connection and setup as well as important
instructionsformaintenance,faultrectication,theexchangeofparts
and the safety of the user. Please read this information before putting
the instrument into operation and keep this manual accessible in the
immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained personnel.
Thecontentsofthismanualmustbemadeavailabletothequalied
personnel and implemented.
1.3 Symbols used
Document ID
This symbol on the front page of this instruction refers to the Docu-
ment ID. By entering the Document ID on www.vega.com you will
reach the document download.
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.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

5
2 For your safety
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
2 For your safety
2.1 Authorised personnel
All operations described in this documentation must be carried out
only by trained specialist personnel authorised by the plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
Model VEGABAR 86 is a pressure transmitter for level and gauge
measurement.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
2.3 Warning about incorrect use
Inappropriate or incorrect use of this product can give rise to applica-
tion-specichazards,e.g.vesseloverllthroughincorrectmounting
or adjustment. Damage to property and persons or environmental
contamination can result. Also, the protective characteristics of the
instrument can be impaired.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and directives.The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsi-
ble for the trouble-free operation of the instrument. When measuring
aggressive or corrosive media that can cause a dangerous situation
if the instrument malfunctions, the operator has to implement suitable
measures to make sure the instrument is functioning properly.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.Forsafety
reasons,onlytheaccessoryspeciedbythemanufacturermustbe
used.
To avoid any danger, the safety approval markings and safety tips on
the device must also be observed and their meaning read in this oper-
ating instructions manual.

6
2 For your safety
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
2.5 EU conformity
ThedevicefullsthelegalrequirementsoftheapplicableEUdirec-
tives.ByaxingtheCEmarking,weconrmtheconformityofthe
instrument with these directives.
YoucanndtheEUconformitydeclarationonourwebsiteunder
www.vega.com/downloads.
2.6 Permissible process pressure
For safety reasons, the instrument must only be operated within the
permissibleprocessconditions.Youcannddetailedinformationon
the process conditions in chapter "Technical data" as well as on the
type label.
Thepermissibleprocesspressurerangeisspeciedonthetypelabel
with "Process pressure", see chapter "Conguration". This applies
even if a measuring cell with a measuring range (order-related) higher
thanthepermissiblepressurerangeoftheprocessttingisinstalled.
Atemperaturederating,e.g.withanges,canlimitthepermissible
process pressure range.
2.7 NAMUR recommendations
NAMUR is the automation technology user association in the process
industry in Germany.The published NAMUR recommendations are
acceptedasthestandardineldinstrumentation.
ThedevicefullstherequirementsofthefollowingNAMURrecom-
mendations:
• NE 21 – Electromagnetic compatibility of equipment
• NE 43 – Signal level for fault information from measuring transduc-
ers
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
• NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.8 Installation and operation in the USA and
Canada
This information is only valid for USA and Canada. Hence the follow-
ing text is only available in the English language.
Installations in the US shall comply with the relevant requirements of
the National Electrical Code (ANSI/NFPA 70).
Installations in Canada shall comply with the relevant requirements of
the Canadian Electrical Code
A Class 2 power supply unit has to be used for the installation in the
USA and Canada.
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

7
2 For your safety
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
with the goal of continuously improving company environmental pro-
tection.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfullthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter "Packaging, transport and storage"
• Chapter "Disposal"

8
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
3 Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
2
1
13
14
12
10
11
5
3
6
4
7
8
9
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Field for approvals
4 Power supply and signal output, electronics
5 Protection rating
6 Measuring range
7 Permissible process pressure
8 Material wetted parts
9 Order number
10 Serial number of the instrument
11 QR code
12 Symbol of the device protection class
13 ID number, instrument documentation
14 Reminder to observe the instrument documentation
The type label contains the serial number of the instrument. With it
youcanndthefollowinginstrumentdataonourhomepage:
• Product code (HTML)
• Delivery date (HTML)
• Order-specicinstrumentfeatures(HTML)
• Operating instructions and quick setup guide at the time of ship-
ment (PDF)
• Order-specicsensordataforanelectronicsexchange(XML)
• Testcerticate(PDF)-optional
Go to "www.vega.com", "Instrument search (serial number)". Enter
the serial number.
Alternatively, you can access the data via your smartphone:
• Download the VEGA Tools app from the "Apple App Store" or the
"Google Play Store"
• Scan the Data Matrix code on the type label of the instrument or
• Enter the serial number manually in the app
Type label
Serial number - Instru-
ment search

9
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software from 1.3.2
Note:
Youcanndthehardwareandsoftwareversionoftheinstrumentas
follows:
• On the type plate of the electronics module
• In the adjustment menu under "Info"
The scope of delivery encompasses:
• Pressure transmitter
• Documentation
– Quick setup guide VEGABAR 86
– Characteristicstestcerticate
– Instructions for optional instrument features
– Ex-specic"Safety instructions" (with Ex versions)
– Ifnecessary,furthercerticates
Note:
Optional instrument features are also described in this operating
instructions manual.The respective scope of delivery results from the
orderspecication.
3.2 Principle of operation
The VEGABAR 86 is suitable for the measurement of the following
process variables:
• Level
Fig. 2: Level measurement with VEGABAR 86
Scope of this operating
instructions manual
Scope of delivery
Measured variables

10
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
Depending on the version, the VEGABAR 86 is also suitable for
electronicdierentialpressuremeasurement.Forthis,theinstrument
is combined with a slave sensor.
Fig. 3: Electronic dierential pressure measurement through Master/Slave
combination
Youcannddetailedinformationintheoperatinginstructionsofthe
respective slave sensor.
The VEGABAR 86 is a submersible pressure transmitter for level
measurementinwells,basinsandopenvessels.Itsgreatexibility
throughdierentcableandtubeversionsallowstheinstrumenttobe
usedinmanydierentapplications.
Measured products are liquids.
Depending on the instrument version and measurement setup, meas-
ured products can also be viscous or contain abrasive substances.
The sensor element is the CERTEC®measuring cell with robust
ceramicdiaphragm.Theprocesspressuredeectstheceramic
diaphragm and causes a capacitance change in the measuring cell.
This capacitance change is converted into an electrical signal and
outputted as measured value via the output signal.
Themeasuringcellisavailableintwosizes:
• CERTEC®(ø 28 mm) with sensor 32 mm
• Mini-CERTEC®(ø 17.5 mm) with sensor 22 mm
A temperature sensor in the ceramic diaphragm of the CERTEC®or
on the ceramic base of the Mini-CERTEC®measuring cell detects the
actual process temperature.The temperature value is outputted via:
• The display and adjustment module
• The current output or the additional current output
Electronicdierential
pressure
Application area
Measured products
Measuring system pres-
sure
Measuring system tem-
perature

11
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
• The digital signal output
Extreme process temperature jumps are also immediately detected
by the CERTEC®measuring cell.The values are compared with that
of an additional temperature measurement on the ceramic base body.
Within only a few measuring cycles the intelligent sensor electronics
compensates unavoidable measurement deviations due to tempera-
ture shocks. Such shocks cause (depending on the set damping) only
slight, brief changes to the output signal.
The measuring cell design depends on the selected pressure type.
Relative pressure: the measuring cell is open to the atmosphere.
The ambient pressure is detected in the measuring cell and compen-
sated.Itthushasnoinuenceonthemeasuredvalue.
Absolute pressure: the measuring cell is evacuated and encapsu-
lated.The ambient pressure is not compensated and does hence
inuencethemeasuredvalue.
Relative pressure, climate-compensated: the measuring cell is
evacuated and encapsulated.The ambient pressure is detected
through a reference sensor in the electronics and compensated. It
thushasnoinuenceonthemeasuredvalue.
The following illustration shows the installation of the ceramic measur-
ing cell in the sensor as well as the sealing concept.
1
2
3
4
5
Fig. 4: Front-ush installation of the ceramic measuring cell with double seal
1 Housing, sensor
2 Measuring cell
3 Lateral seal for measuring cell
4 Additional, front seal for measuring cell
5 Diaphragm
3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Pressure types
Seal concept
Packaging

12
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
3.4 Accessories and replacement parts
The display and adjustment module PLICSCOM is used for measured
value indication, adjustment and diagnosis. It can be inserted into the
sensor or the external display and adjustment unit and removed at
any time.
The integrated Bluetooth module (optional) enables wireless adjust-
ment via standard adjustment devices:
• Smartphone/tablet (iOS or Android operating system)
• PC/notebook with Bluetooth USB adapter (Windows operating
system)
Youcanndfurtherinformationintheoperatinginstructions"Display
and adjustment module PLICSCOM" (Document-ID 36433).
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC. For
parameter adjustment of these instruments, the adjustment software
PACTware with VEGA-DTM is required.
Youcanndfurtherinformationintheoperatinginstructions"Interface
adapter VEGACONNECT" (Document-ID 32628).
Slave sensors of VEGABAR series 80 enable in conjunction with
VEGABAR86anelectronicdierentialpressuremeasurement.
Youcanndfurtherinformationintheoperatinginstructionsofthe
respective slave sensor.
Transport
Transport inspection
Storage
Storage and transport
temperature
Lifting and carrying
PLICSCOM
VEGACONNECT
Slave sensors

13
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
For sensors with double chamber housing the interface adapter
"VEGADIS adapter" is also required for VEGADIS 81.
Youcanndfurtherinformationintheoperatinginstructions
"VEGADIS 81" (Document-ID 43814).
The VEGADIS adapter is an accessory part for sensors with double
chamber housings. It enables the connection of VEGADIS 81 to the
sensor housing via an M12 x 1 plug.
Youcanndfurtherinformationinthesupplementaryinstructions
"VEGADIS adapter" (Document-ID 45250).
VEGADIS 82 is suitable for measured value indication and adjustment
of sensors with HART protocol. It is looped into the 4 … 20 mA/HART
signal cable.
Youcanndfurtherinformationintheoperatinginstructions
"VEGADIS 82 4 … 20 mA/HART" (Document-ID 45300).
PLICSMOBILE T81 is an external GSM/GPRS/UMTS radio unit for
transmission of measured values and for remote parameter adjust-
ment of HART sensors.The adjustment is carried out via a PC with
PACTware and the corresponding DTM or via smartphone/tablet with
the VEGA Tools app. The connection is made via the Bluetooth inter-
face integrated in PLICSMOBILE.
Youcanndfurtherinformationintheoperatinginstructions
"PLICSMOBILE T81/B81/S81" (Document-ID 55234).
PLICSMOBILE 81 is an internal GSM/GPRS/UMTS radio unit for
HART sensors for transmission of measured values and for remote
parameter adjustment.The adjustment is carried out via a PC with
PACTware and the corresponding DTM or via smartphone/tablet with
the VEGA Tools app. The connection is made via the Bluetooth inter-
face integrated in PLICSMOBILE.
Youcanndfurtherinformationinthesupplementaryinstructions
"PLICSMOBILE" (Document-ID 56160).
The overvoltage arrester B81-35 is used in the single or double
chamber housing instead of the connection terminals. It reduces any
voltage surges that may reach the signal cables to a harmless level.
Youcanndfurtherinformationinthesupplementaryinstructions
"Overvoltage arrester B81-35" (Document-ID 50708).
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
Youwillndadditionalinformationinthesupplementaryinstructions
manual "Protective cover" (Document-ID 34296).
VEGADIS 81
VEGADIS adapter
VEGADIS 82
PLICSMOBILE T81
PLICSMOBILE 81
Overvoltage protection
Protective cover

14
3 Product description
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
Screwedangesareavailableindierentversionsaccordingtothe
following standards: DIN 2501, EN 1092-1, BS 10, ASME B 16.5,
JIS B 2210-1984, GOST 12821-80.
Youcanndadditionalinformationinthesupplementaryinstructions
manual "Flanges according to DIN-EN-ASME-JIS".
Welded sockets are used to connect the sensors to the process.
Threaded adapters are used for adaptation of the sensor with
threadedttingG¾orG1½toexistingweldedsockets.
Youcanndfurtherinformationinthesupplementaryinstructions
"Welded socket and adapters" (Document-ID 48094).
The electronics module VEGABAR series 80 is a replacement part
forpressuretransmittersofVEGABARseries80.Thereisadierent
version available for each type of signal output.
Youcanndfurtherinformationintheoperatinginstructions"Elec-
tronics module VEGABAR series 80" (Document-ID 45054).
Flanges
Welded sockets and
adapters
Electronics module

15
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
4 Mounting
4.1 General instructions
Make sure before mounting that all parts of the instrument exposed to
the process are suitable for the existing process conditions.
These are mainly:
• Active measuring component
• Processtting
• Process seal
Process conditions in particular are:
• Process pressure
• Process temperature
• Chemical properties of the medium
• Abrasionandmechanicalinuences
Youcannddetailedinformationontheprocessconditionsinchapter
"Technical data" as well as on the type label.
The instrument is suitable for standard and extended ambient condi-
tions acc. to IEC/EN 61010-1.
Depending on the transmitter, the VEGABAR 86 is supplied with a
protective cap or a transport and mounting protection.
1
2
Fig. 5: VEGABAR 86, transport and mounting protection
1 Transmitter
2 Transport and mounting protection
Remove this protection after mounting and before setting up the
instrument.
In case of slightly contaminated measured media, the transport and
mounting protection can remain on the instrument as an impact pro-
tection during operation.
Protect your instrument against moisture ingress through the following
measures:
• Use a suitable connection cable (see chapter "Connecting to
power supply")
• Tighten the cable gland or plug connector
• Whenmountinghorizontally,turnthehousingsothatthecable
gland or plug connector point downward
• Lead the connection cable downward in front of the cable entry or
plug connector
Suitability for the process
conditions
Suitability for the ambient
conditions
Transport and mounting
protection
Protection against mois-
ture

16
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Makesurethatthedegreeofcontaminationspeciedinchapter
"Technical data" meets the existing ambient conditions.
Oninstrumentswiththreadedtting,thehexagonmustbetightened
withasuitablewrench.Fortheproperwrenchsizeseechapter
"Dimensions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
If there is strong vibration at the mounting location, the instrument
version with external housing should be used. See chapter "External
housing".
The permissible process pressure range is stated on the type label.
The instrument should only be operated with these pressures if the
mountingaccessoryusedalsofullsthesevalues.Thisshouldbeen-
suredbysuitableanges,weldedsockets,tensionringswithClamp
connections, sealings, etc.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter "Technical data" for the environment of the electronics hous-
ing and connection cable are not exceeded.
2
1
Fig. 6: Temperature ranges
1 Process temperature
2 Ambient temperature
Screwing in
Vibrations
Process pressure range -
Mounting accessory
Temperature limits

17
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
4.2 Ventilation and pressure compensation
Thelterelementintheelectronicshousinghasthefollowingfunc-
tions:
• Ventilation of the electronics housing
• Atmospheric pressure compensation (with relative pressure meas-
uring ranges)
Caution:
Thelterelementcausesatime-delayedpressurecompensation.
When quickly opening/closing the housing cover, the measured value
can change for approx. 5 s by up to 15 mbar.
Foraneectiveventilation,thelterelementmustbealwaysfreefrom
buildup.Incaseofhorizontalmounting,turnthehousingsothatthe
lterelementpointsdownwardaftertheinstrumentisinstalled.This
provides better protection against buildup.
Caution:
Donotuseahigh-pressurecleaner.Thelterelementcouldbedam-
aged, which would allow moisture into the housing.
Thefollowingparagraphsdescribehowthelterelementisarranged
inthedierentinstrumentversions.
1 2 3
6
6
6 6
6
5
4
Fig. 7: Position of the lter element
1 Plastic, stainless steel single chamber (precision casting)
2 Aluminium - single chamber
3 Stainless steel single chamber (electropolished)
4 Plastic double chamber
5 Aluminium, stainless steel double chamber housing (precision casting)
6 Filter element
With the following instruments a blind plug is installed instead of the
lterelement:
Filter element - Function
Filter element - Position

18
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
• Instruments in protection IP 66/IP 68 (1 bar) - ventilation via capil-
laries in non-detachable cable
• Instruments with absolute pressure
→ Turnthemetalringinsuchawaythatthelterelementpoints
downward after installation of the instrument. This provides better
protection against buildup.
1
2
Fig. 8: Position of the lter element - Ex-d version
1 Rotatable metal ring
2 Filter element
With absolute pressure measuring ranges, a blind plug is used
insteadofthelterelement.
The Second Line of Defense (SLOD) is a second level of the process
separation in form of a gas-tight leadthrough in the housing neck,
preventing products from penetrating into the housing.
With these instruments, the process assembly is completely en-
capsulated. An absolute pressure measuring cell is used so that no
ventilation is required.
With relative pressure measuring ranges, the ambient pressure is
detected and compensated by a reference sensor in the electronics.
Filter element - Position
Ex-d version
Filter element - Position
Second Line of Defense

19
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
1
2
1
2
Fig. 9: Position of the lter element - gastight leadthrough
1 Filter element
2 Gas-tight leadthrough
1
Fig. 10: Position of the lter element - IP 69K version
1 Filter element
Instruments with absolute pressure have a blind plug mounted
insteadofthelterelement.
4.3 Level measurement
Keep the following in mind when setting up the measuring system:
• Donotmounttheinstrumentclosetothellingstreamoremptying
area
• Mount the instrument so that it is protected against pressure
shocks from the stirrer
Filter element - Position
IP 69K version
Measurement setup

20
4 Mounting
VEGABAR 86 • 4 … 20 mA/HART
45039-EN-180523
4.4 External housing
1
2
3
4
Fig. 11: Arrangement measurement loop, external housing
1 Sensor
2 Connection cable sensor, external housing
3 External housing
4 Signal cable
Conguration