Vega VEGABAR 18 User manual

Operating Instructions
Pressure sensor with ceramic measuring
cell
VEGABAR 18
Two-wire 4 … 20 mA
Document ID: 55575

2
Contents
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
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 Installation and operation in the USA and Canada ........................................................... 5
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Adjustment ..................................................................................................................... 10
3.4 Packaging, transport and storage................................................................................... 10
3.5 Accessories.................................................................................................................... 11
4 Mounting................................................................................................................................. 12
4.1 General instructions ....................................................................................................... 12
4.2 Process pressure measurement..................................................................................... 14
5 Connecting to power supply................................................................................................. 16
5.1 Preparing the connection ............................................................................................... 16
5.2 Connection procedure.................................................................................................... 16
5.3 Wiring plan ..................................................................................................................... 18
5.4 Switch-on phase............................................................................................................. 18
6 Diagnostics and servicing .................................................................................................... 19
6.1 Maintenance .................................................................................................................. 19
6.2 Rectify faults................................................................................................................... 19
6.3 Diagnosis, fault messages ............................................................................................. 20
6.4 How to proceed if a repair is necessary.......................................................................... 20
7 Dismount................................................................................................................................. 21
7.1 Dismounting steps.......................................................................................................... 21
7.2 Disposal ......................................................................................................................... 21
8 Certicatesandapprovals.................................................................................................... 22
8.1 EU conformity................................................................................................................. 22
8.2 NAMUR recommendations ............................................................................................ 22
8.3 Environment management system ................................................................................. 22
9 Supplement ............................................................................................................................ 23
9.1 Technical data ................................................................................................................ 23
9.2 Dimensions .................................................................................................................... 27
9.3 Industrial property rights................................................................................................. 29
9.4 Trademark ...................................................................................................................... 29

3
Contents
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
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: 2020-03-25

4
1 About this document
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
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.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

5
2 For your safety
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
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 18 is a pressure transmitter for process pressure
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 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.

6
2 For your safety
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
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.

7
3 Product description
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• VEGABAR 18 pressure transmitter
• Information sheet "Documents and software" with:
– Instrument serial number
– QR code with link for direct scanning
Note:
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 version from 1.0.0
• Software version from 1.0.0
1
2
3
Fig. 1: Components of VEGABAR 18
1 Processtting
2 Electronics housing
3 Plug connector
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument.
Scope of delivery
Scope of this operating
instructions
Constituent parts
Type label

8
3 Product description
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
0044
4...20mA
12V...35V
+
-
2
4
1
3
3
2
1
4
5
6
VEGABAR 1.
s/n 12345678
IP66/67 TYPE 4X
MWP 10bar (1000kPa)
0...0,1bar (0...10kPa) rel
AL203, FKM, 316L
2019
www.vega.com
D-77761 SCHILTACH,
Made in Germany
123456
Fig. 2: Layout of the type label (example)
1 Sensor type and serial number
2 Field for approvals
3 Power supply and signal output, electronics
4 Technical data
5 Assignment
6 QR code for device documentation
Move to "www.vega.com"andenterinthesearcheldtheserial
number of your instrument.
Thereyoucanndthefollowinginformationabouttheinstrument:
• Order data
• Documentation
• Software
Alternatively,youcanndallviayoursmartphone:
• Scan the QR-code on the type label of the device or
• Enter serial number manually in the VEGA Tools app (available
free of charge in the respective stores)
3.2 Principle of operation
VEGABAR 18 is suitable for applications in virtually all industries. It is
used for the measurement of the following pressure types.
• Gauge pressure
Measured products are gases, vapours and liquids.
The VEGABAR 18 is suitable for the measurement of the following
process variables:
• Process pressure
Documents and software
Application area
Measured products
Measured variables

9
3 Product description
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
Fig. 3: Process pressure measurement VEGABAR 18
The sensor element is the Mini-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.
14 m
1
2
3
Fig.4:CongurationoftheMini-CERTEC®measuring cell
1 Process diaphragm
2 Glass joint
3 Base element
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.
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.
Measuring system pres-
sure
Pressure types
Recessed installation

10
3 Product description
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
1
3
2
Fig. 5: Recessed installation of the measuring cell (example: thread G½, EN 837
manometer connection)
1 Measuringcell
2 Seal for the measuring cell
3 Processtting
3.3 Adjustment
Theinstrumentoersnoadjustmentoptions.
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.
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 %
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature

11
3 Product description
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
3.5 Accessories
The instructions for the listed accessories can be found in the down-
load area on our homepage.
Welded sockets are used to connect the sensors to the process.
Threaded adapters enable simple adaptation of sensors with stand-
ardthreadedttings,e.g.toprocess-sidehygieneconnections.
The suitable mounting accessories for VEGABAR 18 includes si-
phons, blocking valves and measuring instrument holders.
Welded sockets and
adapters
Mounting accessories

12
4 Mounting
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
4 Mounting
4.1 General instructions
The instrument is suitable for standard and extended ambient condi-
tions acc. to DIN/EN/IEC/ANSI/ISA/UL/CSA 61010-1. It can be used
indoors as well as outdoors.
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
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, the 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.
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
Ambient conditions
Process conditions
Permissible process
pressure (MWP)
Protection against mois-
ture

13
4 Mounting
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
This applies mainly to outdoor installations, in areas where high
humidity is expected (e.g. through cleaning processes) and on cooled
or heated vessels.
Makesurethatthedegreeofcontaminationspeciedinchapter
"Technical data" meets the existing ambient conditions.
Ventilation and pressure compensation for VEGABAR 18 are provided
byanair-permeable,moisture-blockinglterelement.
1
Fig.6:Positionofthelterelement
1 Filter element
Foreectiveventilation,thelterelementmustalwaysbefreeof
buildup.
Caution:
Donotuseahigh-pressurecleaner.Thelterelementcouldbedam-
aged, which would allow moisture into the housing.
Ondeviceswithathreadedtting,thehexagonontheprocesstting
must be tightened with a suitable wrench.
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.
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.
Ventilation and pressure
compensation
Screwing in
Process pressure range -
Mounting accessory
Temperature limits

14
4 Mounting
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
1
2
Fig. 7: Temperature ranges
1 Process temperature
2 Ambient temperature
4.2 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.8:Measurementsetupforprocesspressuremeasurementofgasesin
pipelines
1 VEGABAR 18
2 Blocking valve
3 Pipeline
Keep the following in mind when setting up the measuring system:
• Connect via a siphon
In gases
In vapours

15
4 Mounting
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
1
4
3
2
1
2
3
4
Fig.9:Measurementsetupforprocesspressuremeasurementofgasesin
pipelines
1 VEGABAR 18
2 Blocking valve
3 Siphon in U or circular form
4 Pipeline
A protective accumulation of water is formed through condensation
in the pipe bends. Even in applications with hot steam, a medium
temperature < 100 °C on the transmitter is ensured.
Keep the following in mind when setting up the measuring system:
• Mount the instrument below the measuring point
Theeectivepressurelineisalwayslledwithliquidandgasbubbles
can bubble up to the process line.
3
1
2
Fig.10:Measurementsetupforprocesspressuremeasurementofliquidsin
pipelines
1 VEGABAR 18
2 Blocking valve
3 Pipeline
In liquids

16
5 Connecting to power supply
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
• Carryoutelectricalconnectionbytrained,qualiedpersonnel
authorised by the plant operator
• If overvoltage surges are expected, overvoltage arresters should
be installed
Warning:
Onlyconnectordisconnectinde-energizedstate.
Thedataforpowersupplyarespeciedinchapter"Technical data".
Note:
Power the instrument via an energy-limited circuit (power max. 100 W)
acc. to IEC 61010-1, e.g.
• Class 2 power supply unit (acc. to UL1310)
• SELV power supply unit (safety extra-low voltage) with suitable
internal or external limitation of the output current
Keepinmindthefollowingadditionalfactorsthatinuencetheoperat-
ing voltage:
• Lower output voltage of the power supply unit under nominal load
(e.g. with a sensor current of 20.5 mA or 22 mA in case of fault)
• Inuenceofadditionalinstrumentsinthecircuit(seeloadvaluesin
chapter "Technical data")
Use cable with round cross section. Depending on the plug connec-
tion, you have to select the outer diameter of the cable respectively so
thatthesealeectofthecableglandisensured.
Depending on the connection method or signal output, the device is
connected with standard two, three or four-wire cable without shield-
ing.
5.2 Connection procedure
Proceed as follows:
1. Loosen the screw on the rear of the plug connector
2. Remove the plug connector and seal from VEGABAR 18
3. Remove the plug insert from the plug housing
Safety instructions
Voltage supply
Connection cable
Plug according to
ISO 4400

17
5 Connecting to power supply
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
1
2
3
Fig. 11: Loosen the plug insert
1 Cable gland
2 Plug insert
3 Plug housing
4. Remove approx. 5 cm of the cable mantle, strip approx. 1 cm
insulation from the individual wires
5. Lead the cable through the cable gland into the plug housing
6. Connect the wire ends to the screw terminals according to the
wiring plan
2
3
1
4
Fig. 12: Connection to the screw terminals
1 Cable gland
2 Plug housing
3 Plug insert
4 Plug seal
7. Snap the plug insert into the plug housing and insert the sensor
seal
8. Plug the plug insert with seal to VEGABAR 18 and tighten the
screw
Theelectricalconnectionisnished.

18
5 Connecting to power supply
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
5.3 Wiring plan
+
-
1
2
4
1
3
Fig.13:Wiringplan-two-wire4…20mA-M12x1plug
1 Voltage supply and signal output
Contact, plug connector Function/Polarity
1 Voltage supply, signal output/+
2Free
3 Voltage supply, signal output/-
4Free
12
3
+
-
1
Fig.14:Wiringplan-two-wire4…20mA-plugaccordingtoISO4400
1 Voltage supply and signal output
Contact, plug connector Function/Polarity
1 Voltage supply, signal output/+
2 Voltage supply, signal output/-
3Free
Electrically connected with metal housing
5.4 Switch-on phase
Afterswitchingon,thedevicerstcarriesoutaself-check:
• Internal check of the electronics
• The output signal jumps to the set fault current
The current measured value is then output on the signal cable.
M12 x 1 plug
Plug according to
ISO 4400

19
6 Diagnostics and servicing
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
6 Diagnostics and servicing
6.1 Maintenance
If the device is used properly, no special maintenance is required in
normal operation.
Insomeapplications,productbuilduponthediaphragmcaninuence
the measuring result. Depending on the sensor and application, take
precautions to ensure that heavy buildup, and especially a hardening
thereof, is avoided.
The cleaning helps that the type label and markings on the instrument
are visible.
Take note of the following:
• Use only cleaning agents which do not corrode the housings, type
label and seals
• Use only cleaning methods corresponding to the housing protec-
tion rating
6.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
Thedeviceoersmaximumreliability.Nevertheless,faultscanoccur
during operation.These may be caused by the following, e.g.:
• Sensor
• Process
• Voltage supply
• Signal processing
Therstmeasuresare:
• Evaluation of fault messages
• Checking the output signal
• Treatment of measurement errors
A smartphone/tablet with the adjustment app or a PC/notebook with
thesoftwarePACTwareandthesuitableDTMoeryoufurthercom-
prehensive diagnostic possibilities. In many cases, the causes can be
determined in this way and the faults eliminated.
Depending on the reason for the fault and the measures taken, the
steps described in chapter "Setup" must be carried out again or must
be checked for plausibility and completeness.
Should these measures not be successful, please call in urgent cases
the VEGA service hotline under the phone no. [phone].
The hotline is also available outside normal working hours, seven
days a week around the clock.
Maintenance
Precaution measures
against buildup
Cleaning
Reaction when malfunc-
tion occurs
Causes of malfunction
Faultrectication
Reaction after fault recti-
cation
24 hour service hotline

20
6 Diagnostics and servicing
VEGABAR 18 • Two-wire 4 … 20 mA
55575-EN-200327
Sinceweoerthisserviceworldwide,thesupportisprovidedin
English.The service itself is free of charge, the only costs involved are
the normal call charges.
6.3 Diagnosis, fault messages
Connect a multimeter in the suitable measuring range according to
the wiring plan.The following table describes possible errors in the
current signal and helps to eliminate them:
Error Cause Rectication
4 … 20 mA signal missing Electrical connection faulty Check connection, correct, if necessary
Voltage supply missing Check cables for breaks; repair if nec-
essary
Operating voltage too low, load resist-
ance too high
Check, adapt if necessary
Current signal greater than
22 mA, less than 3.6 mA
Sensor electronics defective Replace device or send in for repair de-
pending on device version
6.4 How to proceed if a repair is necessary
Youcanndaninstrumentreturnformaswellasdetailedinformation
about the procedure in the download area of our homepage. By doing
this you help us carry out the repair quickly and without having to call
back for needed information.
In case of repair, proceed as follows:
• Printandlloutoneformperinstrument
• Clean the instrument and pack it damage-proof
• Attach the completed form and, if need be, also a safety data
sheet outside on the packaging
• Ask the agency serving you to get the address for the return ship-
ment.Youcanndtheagencyonourhomepage.
4 … 20 mA signal