Vega VEGABAR 82 User manual

Operating Instructions
Pressure transmitter with ceramic
measuring cell
VEGABAR 82
Probus PA
Document ID: 45031

2
Contents
VEGABAR 82 • Probus PA
45031-EN-220624
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................................................................................................................... 5
2.6 NAMUR recommendations .............................................................................................. 6
2.7 Installation and operation in the USA and Canada ........................................................... 6
2.8 Environmental instructions ............................................................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Supplementary cleaning procedures.............................................................................. 13
3.4 Packaging, transport and storage................................................................................... 13
3.5 Accessories.................................................................................................................... 14
4 Mounting................................................................................................................................. 16
4.1 General instructions ....................................................................................................... 16
4.2 Instructions for oxygen applications ............................................................................... 17
4.3 Ventilation and pressure compensation.......................................................................... 18
4.4 Process pressure measurement..................................................................................... 20
4.5 Level measurement........................................................................................................ 22
4.6 External housing ............................................................................................................ 22
5 Connecting to the bus system.............................................................................................. 23
5.1 Preparing the connection ............................................................................................... 23
5.2 Connecting..................................................................................................................... 24
5.3 Single chamber housing................................................................................................. 25
5.4 Double chamber housing ............................................................................................... 25
5.5 Double chamber housing with VEGADIS-Adapter.......................................................... 27
5.6 Housing IP66/IP68 (1 bar) .............................................................................................. 28
5.7 External housing with version IP68 (25 bar) ................................................................... 28
5.8 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 Menu overview ............................................................................................................... 46
6.7 Save parameter adjustment data.................................................................................... 48
7 Setup with PACTware............................................................................................................. 49
7.1 Connect the PC.............................................................................................................. 49
7.2 Parameterization ............................................................................................................ 49

3
Contents
VEGABAR 82 • Probus PA
45031-EN-220624
7.3 Save parameter adjustment data.................................................................................... 50
8 Set up with other systems .................................................................................................... 51
8.1 DD adjustment programs ............................................................................................... 51
9 Diagnosis, asset management and service ........................................................................ 52
9.1 Maintenance .................................................................................................................. 52
9.2 Cleaning - hygienic connection with compression nut .................................................... 52
9.3 Diagnosis memory ......................................................................................................... 53
9.4 Asset Management function........................................................................................... 54
9.5 Rectify faults................................................................................................................... 57
9.6 Exchange process module on version IP68 (25 bar) ...................................................... 57
9.7 Exchanging the electronics module................................................................................ 58
9.8 Software update............................................................................................................. 58
9.9 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 Communication Probus PA........................................................................................... 74
11.3 Calculation of the total deviation..................................................................................... 77
11.4 Calculation of the total deviation - Practical example...................................................... 78
11.5 Dimensions .................................................................................................................... 80
11.6 Industrial property rights................................................................................................. 92
11.7 Trademark ...................................................................................................................... 92
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.
Editing status: 2022-04-20

4
1 About this document
VEGABAR 82 • Probus PA
45031-EN-220624
1 About this document
1.1 Function
This instruction provides all the information you need for mounting,
connection and setup as well as important instructions for mainte-
nance, 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, note, tip: This symbol indicates helpful additional infor-
mation and tips for successful work.
Note: This symbol indicates notes to prevent failures, malfunctions,
damage to devices or plants.
Caution: Non-observance of the information marked with this symbol
may result in personal injury.
Warning: Non-observance of the information marked with this symbol
may result in serious or fatal personal injury.
Danger: Non-observance of the information marked with this symbol
results in serious or fatal personal injury.
Ex applications
This symbol indicates special instructions for Ex applications.
• List
The dot set in front indicates a list with no implied sequence.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Disposal
This symbol indicates special instructions for disposal.

5
2 For your safety
VEGABAR 82 • Probus PA
45031-EN-220624
2 For your safety
2.1 Authorised personnel
All operations described in this documentation must be carried out
only by trained, qualied 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
The VEGABAR 82 is a pressure transmitter for process pressure and
hydrostatic level 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.
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.
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.

6
2 For your safety
VEGABAR 82 • Probus PA
45031-EN-220624
The EU conformity declaration can be found on our homepage.
Due to the design of its process ttings, the device does not subject
of EU pressure device directive if it is operated at process pressures
≤ 200 bar.
2.6 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 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.
2.7 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.
2.8 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 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"

7
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• VEGABAR 82 pressure transmitter
• Ventilation valves, closing screws – depending on version (see
chapter " Dimensions")
The further scope of delivery encompasses:
• Documentation
– Quick setup guide VEGABAR 82
– Test certicate for pressure transmitters
– Instructions for optional instrument features
– Ex-specic " Safety instructions" (with Ex versions)
– If necessary, further certicates
Information:
Optional instrument features are also described in this operating
instructions manual. The respective scope of delivery results from the
order specication.
This operating instructions manual applies to the following instrument
versions:
• Hardware from 1.0.0
• Software version from 1.2.3
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 type label contains the most important data for identication and
use of the instrument:
Scope of delivery
Scope of this operating
instructions
Type label

8
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
7
6
4
5
2
3
1
Fig. 1: Layout of the type label (example)
1 Product code
2 Field for approvals
3 Technical data
4 Serial number of the instrument
5 QR code
6 Symbol of the device protection class
7 ID numbers, 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)
• Test certicate (PDF) - optional
Move to " www.vega.com" and enter in the search eld the serial
number of your instrument.
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 QR-code on the type label of the device or
• Enter the serial number manually in the app
3.2 Principle of operation
VEGABAR 82 is suitable for applications in virtually all industries. It is
used for the measurement of the following pressure types.
• Gauge pressure
• Absolute pressure
• Vacuum
Measured products are gases, vapours and liquids.
Depending on the process tting and measurement setup, measured
products can be also viscous or contain abrasive substances.
The VEGABAR 82 is suitable for the measurement of the following
process variables:
• Process pressure
• Level
Serial number - Instru-
ment search
Application area
Measured products
Measured variables

9
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
Fig. 2: Process pressure measurement VEGABAR 82
Depending on the version, the VEGABAR 82 is also suitable for
electronic dierential pressure measurement. For this, the instrument
is combined with a Secondary sensor.
Fig. 3: Electronic dierential pressure measurement via a Primary/Secondary
sensor combination
You can nd detailed information in the operating instructions of the
respective Secondary sensor.
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.
Electronicdierential
pressure
Measuring system pres-
sure

10
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
16 µm
1
2
3
Fig. 4: Conguration of the CERTEC®measuring cell
1 Process diaphragm
2 Glass joint
3 Base element
The measuring cell is available in two sizes: CERTEC® (ø 28 mm) and
Mini-CERTEC® (ø 17.5 mm).
Temperature sensors in the ceramic diaphragm and on the ceramic
body of the CERTEC® measuring cell or on the electronics of the
Mini-CERTEC® measuring cell detect the current process tempera-
ture. The temperature value is output via:
• The display and adjustment module
• The current output or the additional current output
• The digital signal output
Even extreme jumps in process temperature are immediately de-
tected by the CERTEC® measuring cell. The values in the ceramic
diaphragm are compared with those on the ceramic base body. Within
a few measuring cycles, the intelligent sensor electronics compen-
sates for otherwise unavoidable measurement deviations caused by
temperature shocks in the range. Depending on the adjusted damp-
ing, these cause only slight and brief changes in 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 contains vacuum and is
encapsulated. 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 presentations show examples for the installation of the
ceramic measuring cell into the process tting and the dierent seal
concepts.
Measuring system tem-
perature
Pressure types
Seal concepts

11
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
The recessed installation is particularly suitable for applications with
gases, vapours and clear liquids. The measuring cell seal is posi-
tioned laterally as well as in addition in front.
1
2
5
6
3
4
Fig. 5: Recessed installation of the measuring cell (example: manometer con-
nection G½)
1 Measuring cell
2 Seal for the measuring cell
3 Additional, front seal for measuring cell
4 Diaphragm
5 Process tting
6 Seal for the process tting
The front-ush installation is particularly suitable for applications with
viscous and abrasive media and in case of buildup. The measuring
cell seal is positioned laterally.
2
3
4
1
5
Fig. 6: Front-ush installation of the measuring cell (example: thread G1½)
1 Seal for the process tting
2 Measuring cell
3 Seal for the measuring cell
4 Process tting
5 Diaphragm
The completely front-ush mounting is particularly suitable for ap-
plications in the paper industry. The diaphragm is in the pulp ow, is
hence cleaned and protected against buildup.
Recessed installation
Front-ushmountingwith
single seal
Completelyfront-ush
mounting with single seal

12
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
1
2
3
4
5
Fig. 7: Front-ush installation of the measuring cell (example: M30 x 1.5)
1 Measuring cell
2 Seal for the measuring cell
3 Seal for the process tting
4 Process tting
5 Diaphragm
The front-ush installation is particularly suitable for applications with
viscous media. The additional, front sealing protects the glass joint
of the measuring cell against chemical attack and the measuring cell
electronics against diusion of aggressive gases from the process.
1
2
3
45
Fig. 8: Front-ush installation of the measuring cell with double seal (example:
ange connection with extension)
1 Measuring cell
2 Seal for the measuring cell
3 Process tting
4 Additional, front seal for measuring cell
5 Diaphragm
The front-ush, hygienic installation of the measuring cell is particu-
larly suitable for food applications. The sealings are installed gap-free.
The form seal of the measuring cell protects also the glass joint.
1
2
3
4
5
Fig. 9: Hygienic installation of the measuring cell (example: hygienic tting with
compression nut)
1 Measuring cell
2 Form seal for the measuring cell
3 Gap-free seal for process tting
4 Process tting
5 Diaphragm
Front-ushmountingwith
double seal
Installation in hygienic
tting

13
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
The front-ush, hygienic installation of the measuring cell acc. to 3A
is particularly suitable for food applications. The sealings are installed
gap-free. The additional front sealing for the measuring cell protects
also the glass joint. A hole in the process tting is used for leakage
detection.
1
62
3
4
5
Fig. 10: Hygienic installation of the measuring cell acc. to 3-A (example: Clamp
connection)
1 Measuring cell
2 Seal for the measuring cell
3 Process tting
4 Additional, front seal for measuring cell
5 Diaphragm
5 Hole for leakage detection
3.3 Supplementary cleaning procedures
The VEGABAR 82 is also available in the version " Oil, grease and
silicone-free" or cleaning for paint compatible version (LABS). These
instruments have passed through a special cleaning procedure to
remove oil, grease and paint-wetting impairment substances (PWIS).
The cleaning is carried out on all wetted parts as well as on surfaces
accessible from outside. To keep the purity level, the instruments are
immediately packed in plastic foil after the cleaning process. The
purity level remains as long as the instrument is kept in the closed
original packaging.
Caution:
The VEGABAR 82 in these versions must not be used in oxygen
applications. For this purpose, devices in the special version "
Resistance to Internal Ignition in oxygen operation according to BAM
certication" are available.
3.4 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 consists of environment-friendly, recyclable card-
board. For special versions, PE foam or PE foil is also used. Dispose
of the packaging material via specialised recycling companies.
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.
Installation in hygienic
ttingacc.to3-A
Packaging
Transport
Transport inspection

14
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
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 moisture 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
3.5 Accessories
The instructions for the listed accessories can be found in the down-
load area on our homepage.
The display and adjustment module is used for measured value indi-
cation, adjustment and diagnosis.
The integrated Bluetooth module (optional) enables wireless adjust-
ment via standard adjustment devices.
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC.
Secondary sensors of VEGABAR series 80 enable in conjunction with
VEGABAR 82 an electronic dierential pressure measurement.
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
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.
The overvoltage arrester B81-35 is used instead of the terminals in
the single or double chamber housing.
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
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.
Storage
Storage and transport
temperature
Lifting and carrying
Display and adjustment
module
VEGACONNECT
Secondary sensors
VEGADIS 81
VEGADIS adapter
Overvoltage protection
Protective cover
Flanges

15
3 Product description
VEGABAR 82 • Probus PA
45031-EN-220624
Welded sockets are used to connect the devices to the process.
Threaded and hygienic adapters enable simple adaptation of devices
with standard threaded ttings to process-side hygiene connections.
Welded socket, threaded
and hygienic adapter

16
4 Mounting
VEGABAR 82 • Probus PA
45031-EN-220624
4 Mounting
4.1 General instructions
Note:
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" of the operating
instructions or on the type label.
Hence make sure before mounting that all parts of the instrument ex-
posed 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
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
• Lead the connection cable downward in front of the cable entry or
plug connector
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Note:
Make sure that during installation or maintenance no moisture or dirt
can get inside the instrument.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Devices with threaded tting are screwed into the process tting with
a suitable wrench via the hexagon.
See chapter " Dimensions" for wrench size.
Warning:
The housing or the electrical connection may not be used for screw-
ing in! Depending on the device version, tightening can cause dam-
age, e. g. to the rotation mechanism of the housing.
Avoid damages on the device by lateral forces, for example by vibra-
tions. It is thus recommended to x the devices with process tting
Process conditions
Protection against mois-
ture
Screwing in
Vibrations

17
4 Mounting
VEGABAR 82 • Probus PA
45031-EN-220624
thread G½ of plastic at the installation site via a suitable measuring
instrument holder.
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 specied by "MWP" (Maxi-
mum Working Pressure) on the type label, see chapter " Structure".
The MWP takes the element of the measuring cell and processing
tting combination with the weakest pressure into consideration and
may applied permanently. The specication refers to a reference
temperature of +20 °C (+68 °F). It also applies when a measuring cell
with a higher measuring range than the permissible pressure range of
the process tting is installed order-related.
In order to prevent damage to the device, a test pressure may only
exceed the specied MWP briey by 1.5 times at reference tempera-
ture. The pressure stage of the process tting as well as the overload
resistance of the measuring cell are taken into consideration here
(see chapter " Technical Data").
In addition, a temperature derating of the process tting, e. g. with
anges, can limit the permissible process pressure range according
to the respective standard.
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.
1
2
Fig. 11: Temperature ranges
1 Process temperature
2 Ambient temperature
4.2 Instructions for oxygen applications
Oxygen and other gases can be explosive when brought into contact
with oils, grease and plastics, so the following measures must also be
taken:
Permissible process
pressure (MWP) - Device
Permissible process
pressure (MWP) - Mount-
ing accessory
Temperature limits
Oxygen applications

18
4 Mounting
VEGABAR 82 • Probus PA
45031-EN-220624
• All components of the system, e.g. measuring instruments, must
be cleaned in accordance with the requirements of recognized
regulations or standards
• Depending on the seal material, certain temperatures and pres-
sures must not be exceeded in oxygen applications, see chapter "
Technical data"
Danger:
Instruments for oxygen applications must be unpacked just before
mounting. After removing the protective cover of the process tting,
the label "O2" will be visible on the process tting. Penetration of oil,
grease and dirt should be avoided. Danger of explosion!
4.3 Ventilation and pressure compensation
1 2 3
6
6
6 6
6
5
4
Fig. 12: 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:
• Instruments in protection IP66/IP68 (1 bar) - ventilation via capillar-
ies 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.
Filter element - Position
Filter element - Position
Ex-d version

19
4 Mounting
VEGABAR 82 • Probus PA
45031-EN-220624
1
2
Fig. 13: Position of the lter element - Ex-d version
1 Rotatable metal ring
2 Filter element
Instruments with absolute pressure have a blind plug mounted
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.
1
2
1
2
Fig. 14: Position of the lter element - gastight leadthrough
1 Filter element
2 Gas-tight leadthrough
Filter element - Position
Second Line of Defense

20
4 Mounting
VEGABAR 82 • Probus PA
45031-EN-220624
1
Fig. 15: Position of the lter element - IP69K version
1 Filter element
Instruments with absolute pressure have a blind plug mounted
instead of the lter element.
4.4 Process pressure measurement
Keep the following in mind when setting up the measuring system:
• Mount the instrument above the measuring point
Possible condensation can then drain o into the process line.
1
2
3
Fig. 16: Measurement setup for process pressure measurement of gases in
pipelines
1 VEGABAR 82
2 Blocking valve
3 Pipeline
Keep the following in mind when setting up the measuring system:
• Connect via a siphon
• Do not insulate the siphon
• Fill the siphon with water before setup
Filter element - Position
IP69K version
Measurement setup in
gases
Measurement setup in
vapours