Vega VEGABAR 66 User manual
Operating Instructions
Suspension pressure transmitter with
CERTEC®measuring cell
VEGABAR 66
4 … 20 mA/HART - climate compensated
Document ID: 36738
2
Contents
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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........................................................................................................ 9
3.3 Operation ....................................................................................................................... 10
3.4 Packaging, transport and storage................................................................................... 10
3.5 Accessories and replacement parts ............................................................................... 11
4 Mounting
4.1 General instructions ....................................................................................................... 12
4.2 Mounting preparations ................................................................................................... 13
4.3 Mounting steps with straining clamp............................................................................... 15
4.4 Mounting steps with screwed connection....................................................................... 15
4.5 Mountingstepswithlocktting....................................................................................... 16
4.6 Mounting steps with housing and thread........................................................................ 17
4.7 Mounting steps, external housing................................................................................... 18
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 19
5.2 Connection procedure.................................................................................................... 20
5.3 Wiring plan, single chamber housing.............................................................................. 22
5.4 Wiring plan, double chamber housing ............................................................................ 23
5.5 Wiring plan, double chamber housing Ex d.................................................................... 25
5.6 Wiring plan - version IP 66/IP 68, 1 bar........................................................................... 26
5.7 Wiring plan, external housing with version IP 68............................................................. 27
5.8 Switch-on phase............................................................................................................. 29
6 Set up with the display and adjustment module PLICSCOM
6.1 Short description ............................................................................................................ 31
6.2 Insert display and adjustment module............................................................................ 31
6.3 Adjustment system......................................................................................................... 32
6.4 Setup steps .................................................................................................................... 33
6.5 Menu schematic............................................................................................................. 42
6.10 Saving the parameter adjustment data........................................................................... 44
7 Set up with PACTware and other adjustment programs
3
Contents
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
7.1 Connect the PC via VEGACONNECT ............................................................................ 45
7.2 Parameter adjustment with PACTware............................................................................ 46
7.3 Parameter adjustment with AMS™ and PDM................................................................. 47
7.4 Saving the parameter adjustment data........................................................................... 47
8 Maintenanceandfaultrectication
8.1 Maintain ......................................................................................................................... 48
8.2 Rectify faults................................................................................................................... 48
8.3 Calculation of total deviation (according to DIN 16086).................................................. 49
8.4 Exchanging the electronics module................................................................................ 51
8.5 Software update............................................................................................................. 51
8.6 Instrument repair ............................................................................................................ 52
9 Dismounting
9.1 Dismounting steps.......................................................................................................... 53
9.2 Disposal ......................................................................................................................... 53
10 Supplement
10.1 Technical data ................................................................................................................ 54
10.2 Dimensions .................................................................................................................... 63
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 66 • 4 … 20 mA/HART - climate compensated
36738-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 66 • 4 … 20 mA/HART - climate compensated
36738-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 66 is a pressure transmitter for measurement of gauge
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 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
2.6 CE conformity
ThisdevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByattachingtheCEmark,VEGAprovidesaconrmationof
successfultesting.Yo u canndtheCEconformitydeclarationinthe
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
Withrespecttocompatibility,theNAMURrecommendationNE53is
fullled.Thisappliesalsotothecorrespondingdisplayandadjust-
ment components. VEGA instruments are generally upward and
downward compatible.
•Sensor software for DTM VEGABAR 66 HART, PA or FF
•DTM VEGABAR 66 for adjustment software PACTware
•Display and adjustment module for sensor software
The parameter adjustment of the basic sensor functions is independ-
ent of the software version. The range of available functions depends
on the respective software version of the individual components.
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 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
3 Product description
3.1 Conguration
The scope of delivery encompasses:
•VEGABAR 66 pressure transmitter with suspension cable
•Strainingclamp(optionallyavailablewithscrewedtting)
•External electronics
•or VEGABAR 66 pressure transmitter with connection tube
•Documentation
– this operating instructions manual
– Testcerticateforpressuretransmitters
– SafetyManual31637"VEGABAR series 50 and 60 -
4 … 20 mA/HART"
– 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
VEGABAR 66 with suspension cable consists of the following com-
ponents:
•Transmitter
•Suspension cable
•External housing with electronics, optionally available with plug
connector
VEGABAR 66 with connection tube consists of the following compo-
nents:
•Transmitter
•Connectiontube(optionallyavailablewithlocktting)
•Housing with integrated electronics
Thecomponentsareavailableindierentversions.
Scope of delivery
Constituent parts
8
3 Product description
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
1
2
3
4
4
5
6
Fig. 1: Example of a VEGABAR 66 with suspension cable (left) and connection
tube (right)
1 Housing with integrated electronics
2 Suspension cable
3 Connection tube
4 Threaded tting
5 Transmitter
6 Protective cap
Thenameplatecontainsthemostimportantdataforidenticationand
use of the instrument:
Type plate
9
3 Product description
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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 Electronics
5 Protection rating
6 Measuring range
7 Process and ambient temperature, process pressure
8 Material, wetted parts
9 Hardware and software version
10 Order number
11 Serial number of the instrument
12 ID numbers, instrument documentation
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.
3.2 Principle of operation
VEGABAR 66 4 …20 mA/HART - climate compensated is a suspen-
sion pressure transmitter for level measurement in wells, basins and
atmosphericallyopenvesselsunderdicultconditions(coldmedium
and warm humid environment).
The sensor element is an encapsulated CERTEC® absolute pressure
measuringcellwithrobust,front-ush(dependingontheprocess
tting),abrasionresistantceramicdiaphragm.Theprocesspressure
causes a capacitance change in the measuring cell via the ceramic
diaphragm. This capacitance change is converted into an electrical
signal, compared with an integrated reference pressure measurement
and outputted as measured value via the output signal.
The CERTEC® measuring cell is also equipped with a temperature
sensor. The temperature value can be displayed via the display and
adjustment module or processed via the signal output.
As a standard feature, the CERTEC® measuring cell is equipped with
a lateral, recessed seal.
Instruments with double seal have an additional front seal.
Application area
Functional principle
Seal concept
10
3 Product description
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
Instrumentswithhygienicttingareequippedwithagap-freeform
seal.
4…20 mA/HART two-wire electronics for voltage supply and meas-
ured value transmission on the same cable.
Thesupplyvoltagerangecandierdependingontheinstrument
version.
Thedataforpowersupplyarespeciedinchapter"Technical data".
The optional background lighting of the display and adjustment
module is powered by the sensor. A certain level of operating voltage
isrequiredforthis.Youcanndtheexactvoltagespecicationsin
chapter"Technical data".
Theoptionalheatingrequiresitsownoperatingvoltage.Yo u cannd
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
•withmanufacturer-specicadjustmentprogramsAMS™orPDM
•With a HART handheld
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.
Uptothetimeofinstallation,thepackagesmustbeleftclosedand
stored according to the orientation and storage markings on the
outside.
Unlessotherwiseindicated,thepackagesmustbestoredonlyunder
the following conditions:
•Not in the open
Voltage supply
Packaging
Transport
Transport inspection
Storage
11
3 Product description
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
•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).
The interface adapter VEGACONNECT 4 enables the connection of
communication-capableinstrumentstotheUSBinterfaceofaPC.For
parameter adjustment of these instruments, an adjustment software
such as PACTware with VEGA-DTM is required.
Youcanndfurtherinformationintheoperatinginstructions"Interface
adapter VEGACONNECT"(Document-ID32628).
VEGADIS 61 is suitable for external measured value indication and
adjustment of plics® sensors. It is connected to the sensor with an up
to 25 m long, four-wire, screened standard cable.
Youcanndfurtherinformationintheoperatinginstructions"VE-
GADIS 61"(Document-ID27720).
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 and transport
temperature
Display and adjustment
module
Interface adapter
External display and
adjustment unit
Flanges
Measuring instrument
holder
Protective cover
Electronics module
12
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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
13
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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.
4.2 Mounting preparations
For the suspension cable version note the following points when
selecting the mounting position:
•Sideways movements of the transmitter can cause measurement
errors
1. Therefore, mount VEGABAR 66 in a calm area or in a suitable
protective tube
•The suspension cable has a capillary for atmospheric pressure
compensation
2. Therefore lead the cable end into a dry space or directly to the
external electronics
Theexternalelectronicsisprovidedwithterminalsandalterelement
for pressure compensation. Keep in mind for all versions:
•The protective cover prevents mechanical damage to the measur-
ing cell. It should only be removed when the sensor is deployed in
extremely polluted water.
14
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
Fig. 5: Mounting example: Version with connection tube in an open vessel
Fig. 6: Mounting example: Version with suspension cable in a pump shaft
15
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
4.3 Mounting steps with straining clamp
2
3
1
Fig. 7: Straining clamp
1 Suspension cable
2 Suspension opening
3 Clamping jaws
Mount VEGABAR 66 with straining clamp as follows:
1. Hang the straining clamp on a suitable wall hook
2. Lower VEGABAR 66 to the requested height
3. Slide the clamping jaws upward and push the suspension cable
between them
4. Hold the suspension cable, push the clamping jaws downward
andxthemwithalightblow
Removal is carried out in reverse order.
4.4 Mounting steps with screwed connection
1
2
3
4
5
6
Fig. 8: Threaded tting
1 Suspension cable
2 Seal screw
3 Cone bushing
4 Seal cone
5 Threaded tting
6 Seal
16
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
Mount VEGABAR 66 with screwed connection as follows:
1. Weld the welded socket into the vessel top
2. Lower VEGABAR 66 to the requested height by means on the
welded socket G1½ or 1½ NPT on the vessel side
3. Insert the suspension cable from below into the open screwed
connection
4. Slide the seal cone and the cone sleeve over the suspension
cable, fasten manually with the seal screw
5. Screw the screwed connection into the socket, tighten with
SW 30 and then tighten seal screw with SW 19
How to correct the height:
1. Loosen seal screw with SW 19
2. Slide seal cone and cone sleeve to the requested position on the
cable
3. Fasten the seal screw
Removal is carried out in reverse order.
4.5 Mountingstepswithlocktting
1
3
2
4
5
Fig. 9: Lock tting
1 Upper hexagon
2 Fixing screw
3 Washer disk
4 Lower hexagon
5 Fixing screw
MountVEGABAR66withlockttingasfollows:
1. Weld the welded socket G1½ or 1½ NPT to the vessel top
2. Lower VEGABAR 66 through the welded socket.
17
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
3. Turnthelockttingonthelowerhexagonintotheweldedsocket.
Usearesistantseal.SpannerwidthSW41,torquemax.80Nm.
4. Adjust the connection tube of VEGABAR 66 to the requested
height and hold it
5. Turn the upper hexagon into the lower hexagon. Spanner width
SW 41, torque max. 80 Nm. VEGABAR 66 is now temporarily hold
by the washer disc.
6. Tightenxingscrews(2)and(5)withanAllenwrenchsize2.5.
Torque max. 7 Nm.
Thexingscrewspresslightlyintotheconnectiontubeandfasten
VEGABAR 66 in this position
4.6 Mounting steps with housing and thread
Fig. 10: Housing and thread
1 Housing
2 Seal
3 Thread
Mount VEGABAR 66 with housing and thread in the following way:
1. Weld the welded socket G1½ or 1½ NPT to the vessel top
2. Insert the transmitter with connection tube or suspension cable
into the opening
3. Turn the thread with seal into the socket and tighten with SW 461)
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Mount VEGABAR 66 with housing and thread in the following way:
1. Fasten the mounting bracket at the suitable height on the basin
wall
Information:
We recommend articles from the line of VEGA accessories:
•Mounting bracket of stainless steel, article no. 2.21615
•Counter nut of PP, article no. 2.10371
Mount into the vessel
Mounting into the basin
1) Seal with resistant material with thread 1½ NPT.
18
4 Mounting
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-EN-130321
2. Insert the transmitter with connection tube or suspension cable
into the opening of the mounting bracket and counter nut
3. Fasten counter nut with SW 46 on the thread
Removal is carried out in reverse order.
4.7 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. 11: Drilling template - wall mounting plate
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.
Wall mounting
19
5 Connecting to power supply
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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
20
5 Connecting to power supply
VEGABAR 66 • 4 … 20 mA/HART - climate compensated
36738-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.Yo u canndspecicationsonthepo-
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
Other manuals for VEGABAR 66
3
Table of contents
Other Vega Transmitter manuals
Vega
Vega VEGABAR 82 User manual
Vega
Vega T-677 Series User manual
Vega
Vega VEGABAR 80 Series Wiring diagram
Vega
Vega VEGABAR 82 User manual
Vega
Vega VEGABAR 86 User manual
Vega
Vega VEGABAR 82 User manual
Vega
Vega VEGABAR 86 User manual
Vega
Vega VEGABAR 86 User manual
Vega
Vega VEGADIF 65 User manual
Vega
Vega VEGADIF 65 User manual
Vega
Vega VEGABAR 83 User manual
Vega
Vega VEGABAR 81 User manual
Vega
Vega VEGABAR 54 User manual
Vega
Vega VEGABAR 54 User manual
Vega
Vega VEGABAR 82 User manual
Vega
Vega VEGABAR 82 User manual
Vega
Vega VEGABAR 82 User manual
Vega
Vega VEGAPULS 62 User manual
Vega
Vega VEGABAR 81 User manual
Vega
Vega VEGABAR 81 User manual
