Vega VEGABAR 52 User manual
Operating Instructions
Pressure transmitter with CERTEC®
measuring cell
VEGABAR 52
4 … 20 mA
Document ID: 36716
2
Contents
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
Contents
1 About this document
1.1 Function ........................................................................................................................... 4
1.2 Target group ..................................................................................................................... 4
1.3 Symbolism used............................................................................................................... 4
2 For your safety
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 Safety label on the instrument .......................................................................................... 5
2.6 CE conformity................................................................................................................... 6
2.7 Measuring range - permissible process pressure............................................................. 6
2.8 FulllmentofNAMURrecommendations ......................................................................... 6
2.9 Safety instructions for Ex areas ........................................................................................ 6
2.10 Environmental instructions ............................................................................................... 6
3 Product description
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 8
3.3 Operation ......................................................................................................................... 9
3.4 Packaging, transport and storage..................................................................................... 9
3.5 Accessories and replacement parts ............................................................................... 10
4 Mounting
4.1 General instructions ....................................................................................................... 11
4.2 Mounting steps............................................................................................................... 13
4.3 Mounting steps, external housing................................................................................... 13
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 15
5.2 Connection procedure.................................................................................................... 16
5.3 Wiring plan, single chamber housing.............................................................................. 17
5.4 Wiring plan - version IP 66/IP 68, 1 bar........................................................................... 18
5.5 Wiring plan, external housing with version IP 68............................................................. 19
5.6 Switch-on phase............................................................................................................. 20
6 Set up with the display and adjustment module PLICSCOM
6.1 Short description ............................................................................................................ 21
6.2 Insert display and adjustment module............................................................................ 21
6.3 Adjustment system......................................................................................................... 22
6.4 Setup steps .................................................................................................................... 23
6.5 Menu schematic............................................................................................................. 31
7 Set up with PACTware and other adjustment programs
7.1 Connect the PC via VEGACONNECT ............................................................................ 34
7.2 Parameter adjustment with PACTware............................................................................ 34
8 Maintenanceandfaultrectication
8.1 Maintain ......................................................................................................................... 35
8.2 Rectify faults................................................................................................................... 35
8.3 Calculation of total deviation (according to DIN 16086).................................................. 36
3
Contents
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
8.4 Exchanging the electronics module................................................................................ 38
8.5 Software update ............................................................................................................. 38
8.6 Instrument repair ............................................................................................................ 39
9 Dismounting
9.1 Dismounting steps.......................................................................................................... 40
9.2 Disposal ......................................................................................................................... 40
10 Supplement
10.1 Technical data ................................................................................................................ 41
10.2 Dimensions .................................................................................................................... 50
Supplementary documentation
Information:
Supplementary documents appropriate to the ordered version come
withthedelivery.Youcanndthemlistedinchapter"Product descrip-
tion".
Editing status: 2013-03-11
4
1 About this document
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
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 instruc-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
tion 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 specialist
personnel.The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbolism used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence
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 52 • 4 … 20 mA
36716-EN-130321
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist personnel authorised by the
plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
VEGABAR 52 is a pressure transmitter for measurement of gauge
pressure, absolute pressure and vacuum.
Youcannddetailedinformationontheapplicationrangeinchapter
"Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
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-
traryconversionsormodicationsareexplicitlyforbidden.
2.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a high-tech instrument requiring the strict observance of stand-
ard regulations and guidelines.The user must take note of the safety
instructionsinthisoperatinginstructionsmanual,thecountry-specic
installation standards as well as all prevailing safety regulations and
accident prevention rules.
Theinstrumentmustonlybeoperatedinatechnicallyawlessand
reliable condition.The operator is responsible for trouble-free opera-
tion of the instrument.
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.
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
6
2 For your safety
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
2.6 CE conformity
ThisdevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByattachingtheCEmark,VEGAprovidesaconrmationof
successfultesting.YoucanndtheCEconformitydeclarationinthe
downloadareaof"www.vega.com".
2.7 Measuring range - permissible process
pressure
Due to the application, a measuring cell with a measuring range
higherthanthepermissiblepressurerangeoftheprocessttingmay
have been integrated.The permissible process pressure is stated with
"Processpressure"onthetypelabel,seechapter3.1"Conguration".
For safety reasons, this range must not be exceeded.
2.8 FulllmentofNAMURrecommendations
ThedevicefulllstherequirementsoftheapplicableNAMURrecom-
mendations.
2.9 Safety instructions for Ex areas
PleasenotetheEx-specicsafetyinformationforinstallationandop-
eration in Ex areas.These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.
2.10 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.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfulllthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter"Packaging, transport and storage"
• Chapter"Disposal"
7
3 Product description
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• VEGABAR 52 process pressure transmitter
• Documentation
– this operating instructions manual
– Testcerticateforpressuretransmitters
– SafetyManual31637"VEGABAR series 50 and 60 -
4 … 20 mA/HART"(optional)
– Operatinginstructionsmanual27835"Display and adjustment
module PLICSCOM"(optional)
– Supplementaryinstructionsmanual31708"Heating for display
and adjustment module"(optional)
– Supplementaryinstructionsmanual"Plug connector for con-
tinuously measuring sensors"(optional)
– Ex-specic"Safety instructions"(withExversions)
– ifnecessary,furthercerticates
The VEGABAR 52 consists of the components:
• Processttingwithmeasuringcell
• Housing with electronics, optionally available with plug connector
• Housing cover, optionally available with display and adjustment
module
Thecomponentsareavailableindierentversions.
1
2
3
Fig. 1: Example of a VEGABAR 52 with manometer connection G½ A according
to EN 837 and plastic housing
1 Housing cover with integrated display and adjustment module (optional)
2 Housing with electronics
3 Process tting with measuring cell
Thenameplatecontainsthemostimportantdataforidenticationand
use of the instrument:
Scope of delivery
Constituent parts
Type plate
8
3 Product description
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
2
1
13
10
5
4
3
6
7
8
9
11
12
14
Fig. 2: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Measuring range
5 Process pressure
6 Process temperature
7 Electronics, voltage supply
8 Protection rating
9 Order number
10 Serial number
11 Data-Matrix-Code for Smartphone-App
12 Material process seal
13 ID numbers, instrument documentation
14 Notied authority for CE marking
With the serial number, you can access the delivery data of the instru-
ment via www.vega.com,"VEGA Tools"and"serial number search".
Inadditiontothetypelabeloutside,youcanalsondtheserialnum-
ber on the inside of the instrument.
This operating instructions manual applies to the following instrument
versions:
• Software from 3.82
3.2 Principle of operation
VEGABAR 52 is a pressure transmitter for use in the paper, food
processing and pharmaceutical industries as well as in water/sewage
water plants. Depending on the version, it is used for level, gauge,
absolute pressure or vacuum measurement. Measured products are
gases, vapours and liquids, also those containing abrasive sub-
stances.
Sensor element is the CERTEC®measuring cell with robust, depend-
entontheprocessttingalsofront-ush,abrasion-resistantceramic
diaphragm.The process pressure causes a capacitance change in
the measuring cell via the ceramic diaphragm.This change is con-
verted into an appropriate output signal and outputted as measured
value.
Scope of this operating
instructions manual
Application area
Functional principle
9
3 Product description
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
The CERTEC®measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the display and
adjustment module as well as processed via the signal output (with
digital versions).
As a standard feature, the CERTEC®measuring cell is equipped with
a lateral, recessed seal.
Instruments with double seal have an additional front seal.
Instrumentswithhygienicttingareequippedwithagap-freeform
seal.
4 … 20 mA two-wire electronics for voltage supply and measured
value transmission on the same cable.
Thesupplyvoltagerangecandierdependingontheinstrumentver-
sion.Theexactrangeisstatedinchapter"Technical data".
The backlight of the display and adjustment module is powered by
the sensor. The prerequisite for this is a supply voltage at a certain
level.Theexactvoltagespecicationsarestatedinchapter"Technical
data".
Theoptionalheatingrequiresitsownoperatingvoltage.Youcannd
detailsinthesupplementaryinstructionsmanual"Heating for display
and adjustment module".
This function is generally not available for approved instruments.
3.3 Operation
The instrument can be adjusted with the following adjustment media:
• With the display and adjustment module
• with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
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 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.
Transport must be carried out under 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.
Seal concept
Voltage supply
Packaging
Transport
Transport inspection
10
3 Product description
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
Uptothetimeofinstallation,thepackagesmustbeleftclosedand
stored according to the orientation and storage markings on the
outside.
Unlessotherwiseindicated,thepackagesmustbestoredonlyunder
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
• Storageandtransporttemperatureseechapter"Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
3.5 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 and removed at any time.
Youcanndfurtherinformationintheoperatinginstructions"Display
and adjustment module PLICSCOM"(Document-ID27835).
Flangesareavailableindierentversionsaccordingtothefollowing
standards: DIN 2501, EN 1092-1, ANSI B 16.5, JIS B 2210-1984,
GOST 12821-80.
Youcanndadditionalinformationinthesupplementaryinstructions
manual"Flanges according to DIN-EN-ASME-JIS"(Document-ID
31088).
The measuring instrument holder is used for wall/tube mounting of
VEGABAR series 50 pressure transmitters and VEGAWELL 52 sus-
pension pressure transmitters. Supplied reducers enable the adapta-
tiontodierentinstrumentdiameters.Thematerialusedis316L.
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
Youwillndadditionalinformationinthesupplementaryinstructions
manual"Protective cover"(Document-ID34296).
The electronics module is a replacement part for pressure transmitter
VEGABAR. One version is available for each type of signal output.
Youndfurtherinformationintheoperatinginstructions"Electronics
module VEGABAR series 50 and 60 "(Document-ID30175).
Storage
Storage and transport
temperature
Display and adjustment
module
Flanges
Measuring instrument
holder
Protective cover
Electronics module
11
4 Mounting
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
4 Mounting
4.1 General instructions
Make sure that all parts of the instrument coming in direct contact
with the process, especially the sensor element, process seal and
processtting,aresuitablefortheexistingprocessconditions,such
as process pressure, process temperature as well as the chemical
properties of the medium.
Youcanndthespecicationsinchapter"Technical data"andonthe
nameplate.
Select an installation position you can easily reach for mounting and
connectingaswellaslaterretrottingofadisplayandadjustment
module.The housing can be rotated by 330° without the use of any
tools.You can also install the display and adjustment module in four
dierentpositions(eachdisplacedby90°).
Usetherecommendedcables(seechapter"Connecting to power
supply")andtightenthecablegland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cableentry.Rainandcondensationwatercanthusdraino.Thisap-
plies mainly to outdoor mounting as well as installation in areas where
high humidity is expected (e.g. through cleaning processes) or on
cooled or heated vessels.
Fig. 3: Measures against moisture penetration
The ventilation of the electronics housing as well as the atmospheric
pressurecompensationforthemeasuringcellarerealisedviaalter
element in the area of the cable gland.
Suitability for the process
conditions
Installation position
Moisture
Ventilation and pressure
compensation
12
4 Mounting
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
2
1
2
1
2
1
1
2
Fig. 4: Position of the lter element
1 Filter element
2 Blind plug
Caution:
Duetotheltereect,thepressurecompensationistimedelayed.
When opening/closing the housing cover quickly, the measured value
can change for a period of approx. 5 s by up to 15 mbar.
Information:
Makesurethatthelterelementisalwaysfreeofbuildupduring
operation. A high-pressure cleaner may not be used for cleaning.
With instrument versions in protection IP 66/IP 68, 1 bar, the ventila-
tion is realised via the capillaries in the permanently connected cable.
Thelterelementisreplacedbyablindplug.
Higher process temperatures often mean also higher ambient
temperatures. Make sure that the upper temperature limits stated in
chapter"Technical data"fortheenvironmentoftheelectronicshous-
ing and connection cable are not exceeded.
1
2
Fig. 5: Temperature ranges
1 Process temperature
2 Ambient temperature
Temperature limits
13
4 Mounting
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
4.2 Mounting steps
FormountingVEGABAR52,aweldedsocketisrequired.Youcannd
thesecomponentsinthesupplementaryinstructionsmanual"Welded
socket and seals".
Usethesealttingbelongingtotheinstrument,orincaseofNPT
connections, a high-resistance sealing material.
→ Screw VEGABAR 52 into the welded socket. Tighten the hexagon
ontheprocessttingwithasuitablewrench.Wrenchsize,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.
SealtheangeconnectionsaccordingtoDIN/ANSIwithasuitable,
resistant seal and mount VEGABAR 52 with suitable screws.
Usethesealsuitablefortherespectiveprocesstting.Youcannd
thecomponentsinthesupplementaryinstructionsmanual"Welded
socket and seals".
4.3 Mounting steps, external housing
1. Mark the holes according to the following drilling template
2. Depending on the mounting surface, fasten the wall mounting
plate with 4 screws
90 mm (3.54")
R 3,5 mm
(0.14")
3mm
(0.12")
70 mm (2.76") 8 mm
(0.32")
93 mm (3.66")
110 mm (4.33")
Fig. 6: Drilling template - wall mounting plate
Welding the socket
Sealing/Screwing in
threaded versions
Sealing/Screwing in
angeversions
Sealing/Screwing in
hygienicttings
Wall mounting
14
4 Mounting
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
Tip:
Mount the wall mounting plate so that the cable entry of the socket
housing points downward.The socket housing can be displaced by
180° to the wall mounting plate.
Warning:
The four screws of the socket housing must only be hand screwed. A
torque > 5 Nm (3.688 lbf ft) can damage the wall mounting plate.
15
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
• Connect only in the complete absence of line voltage
• If overvoltage surges are expected, overvoltage arresters should
be installed
Tip:
We recommend using VEGA overvoltage arresters B63-48 and
ÜSB 62-36G.X.
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcerticatesofthesensorsandpower
supply units.
Power supply and current signal are carried on the same two-wire
cable.Thevoltagesupplyrangecandierdependingontheinstru-
ment version.
Thedataforpowersupplyarespeciedinchapter"Technical data".
Provide a reliable separation between the supply circuit and the
mains circuits according to DIN EN 61140 VDE 0140-1.The VEGA
power supply units VEGATRENN 149A Ex, VEGASTAB 690 as well
as all VEGAMETs and VEGASCANs meet this requirement.
Keepinmindthefollowingadditionalfactorsthatinuencetheoperat-
ing voltage:
• Output voltage of the power supply unit can be lower under nomi-
nal load (with a sensor current of 20.5 mA or 22 mA in case of fault
message)
• Inuenceofadditionalinstrumentsinthecircuit(seeloadvaluesin
chapter"Technical data")
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should
be used.
Usecablewithroundcross-section.Acableouterdiameterof
5…9mm(0.2…0.35in)ensuresthesealeectofthecablegland.
Ifyouareusingcablewithadierentdiameterorcross-section,
exchange the seal or use a suitable cable gland.
We generally recommend the use of screened cable for HART multi-
drop mode.
On the instrument with cable entry ½ NPT and plastic housing there is
ametallic½"threadedinsertmouldedintotheplastichousing.
Caution:
No grease should be used when screwing the NPT cable gland or
steel tube into the threaded insert. Standard grease can contain
additives that corrode the connection between threaded insert and
Safety instructions
Voltage supply
Connection cable
Cablegland½NPT
16
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
housing.Thiswouldinuencethestabilityoftheconnectionandthe
tightness of the housing.
If screened cable is necessary, connect the cable screen on both
ends to ground potential. In the sensor, the screen must be connected
directly to the internal ground terminal.The ground terminal on the
outside of the housing must be connected to the potential equalisa-
tion (low impedance).
If potential equalisation currents are expected, the connection on the
processing side must be made via a ceramic capacitor (e. g. 1 nF,
1500 V). The low-frequency potential equalisation currents are thus
suppressed,buttheprotectiveeectagainsthighfrequencyinterfer-
ence signals remains.
Warning:
Considerablepotentialdierencesexistinsidegalvanicplantsaswell
as vessels with cathodic corrosion protection.Very large equalisa-
tioncurrentscanowthroughthecablescreenwhenthescreen
is grounded on both ends. To avoid this, the cable screen must be
connected to ground potential only on one end (inside the switch-
ing cabinet) in such applications.The cable screen must not be
connected to the internal ground terminal in the sensor and the outer
ground terminal on the housing not to potential equalisation!
Information:
Themetallicpartsoftheinstrument(transmitter,processtting,etc.)
are conductively connected with the inner and outer ground terminal
on the housing.This connection exists either as a direct metallic
contact or via the shielding of the special connection cable on instru-
mentswithexternalelectronics.Youcanndspecicationsonthepo-
tentialconnectionswithintheinstrumentinchapter"Technical data".
Take note of the corresponding installation regulations for Ex applica-
tions. In particular, make sure that no potential equalisation currents
owoverthecablescreen.Incaseofgroundingonbothsidesthis
can be achieved by the use of a capacitor or a separate potential
equalisation.
5.2 Connection procedure
Proceed as follows:
1. Unscrewthehousingcover
2. If a display and adjustment module is installed, remove it by turn-
ing it to the left.
3. Loosen compression nut of the cable entry
4. Remove approx. 10 cm of the cable mantle, strip approx. 1 cm
insulation from the individual wires
5. Insert the cable into the sensor through the cable entry
6. Lift the opening levers of the terminals with a screwdriver (see
following illustration)
7. Insert the wire ends into the open terminals according to the wir-
ing plan
Cable screening and
grounding
Single/Double chamber
housing
17
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
8. Press down the opening levers of the terminals, you will hear the
terminal spring closing
9. Check the hold of the wires in the terminals by lightly pulling on
them
10. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation
11. Tighten the compression nut of the cable entry. The seal ring must
completely encircle the cable
12. Screw the housing cover back on
Theelectricalconnectionishencenished.
Fig. 7: Connection steps 6 and 7
5.3 Wiring plan, single chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
18
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
2
1
Display
4...20mA
12
Fig. 8: Electronics and connection compartment, single chamber housing
1 Spring-loaded terminals for voltage supply
2 Ground terminal for connection of the cable screen
1
12
4...20mA Display
Fig. 9: Wiring plan, single chamber housing
1 Voltage supply/Signal output
5.4 Wiring plan - version IP 66/IP 68, 1 bar
1
2
Fig. 10: Wire assignment, connection cable
1 brown (+) and blue (-) to power supply or to the processing system
2 Shielding
Electronics and connec-
tion compartment
Wiring plan
Wire assignment, con-
nection cable
19
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
5.5 Wiring plan, external housing with version
IP 68
Fig. 11: VEGABAR 52 in IP 68 version 25 bar and axial cable outlet, external
housing
1234
6
34
12
5
Fig. 12: Connection of the sensor in the housing socket
1 Brown
2 Blue
3 Yellow
4 White
5 Shielding
6 Breather capillaries
Overview
Terminal compartment,
housing socket
20
5 Connecting to power supply
VEGABAR 52 • 4 … 20 mA
36716-EN-130321
2
3
Display
4...20mA
12
1
Fig. 13: Electronics and connection compartment
1 Spring-loaded terminals for voltage supply
2 Ground terminal for connection of the cable screen
3 Cable gland to the sensor
1
12
4...20mA Display
Fig. 14: Wiring plan external electronics
1 Voltage supply/Signal output
5.6 Switch-on phase
After connecting VEGABAR 52 to power supply or after a voltage
recurrence, the instrument carries out a self-check for approx. 30
seconds:
• Internal check of the electronics
• Indicationoftheinstrumenttype,thermwareaswellasthesen-
sor TAGs (sensor designation)
• Outputsignaljumpsbriey(approx.10seconds)tothesetfault
current
Then the corresponding current is outputted to the cable (the value
corresponds to the actual level as well as the settings already carried
out, e.g. factory setting).
Electronics and connec-
tion compartment for
power supply
Wiring plan external
electronics
Switch-on phase
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2
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