Vega VEGACAL 64 User manual

Operating Instructions
Capacitive rod electrode for continuous
level measurement of adhesive products
VEGACAL 64
Two-wire 4 … 20 mA/HART
Document ID: 30030

2
Contents
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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 Safety instructions for Ex areas ........................................................................................ 6
2.9 Environmental instructions ............................................................................................... 6
3 Product description ................................................................................................................. 7
3.1 Conguration.................................................................................................................... 7
3.2 Principle of operation........................................................................................................ 9
3.3 Adjustment ....................................................................................................................... 9
3.4 Packaging, transport and storage................................................................................... 10
3.5 Accessories.................................................................................................................... 10
4 Mounting................................................................................................................................. 13
4.1 General instructions ....................................................................................................... 13
4.2 Mounting instructions ..................................................................................................... 15
5 Connecting to power supply................................................................................................. 17
5.1 Preparing the connection ............................................................................................... 17
5.2 Connection procedure.................................................................................................... 18
5.3 Wiring plan, single chamber housing.............................................................................. 19
5.4 Wiring plan, double chamber housing ............................................................................ 20
5.5 Wiring plan, Ex-d double chamber housing.................................................................... 22
5.6 Wiring plan - version IP66/IP68, 1 bar ............................................................................ 23
6 Set up with the display and adjustment module PLICSCOM ............................................ 24
6.1 Short description ............................................................................................................ 24
6.2 Insert display and adjustment module............................................................................ 24
6.3 Adjustment system......................................................................................................... 25
6.4 Setup steps .................................................................................................................... 26
6.5 Menu schematic............................................................................................................. 35
6.6 Saving the parameterisation data................................................................................... 37
7 Set up with PACTware and other adjustment programs .................................................... 38
7.1 Connect the PC.............................................................................................................. 38
7.2 Parameter adjustment with PACTware............................................................................ 39
7.3 Parameter adjustment with AMS™ and PDM................................................................. 40
7.4 Saving the parameterisation data................................................................................... 41
8 Set up with smartphone/tablet/PC/notebook via Bluetooth.............................................. 42
8.1 Preparations................................................................................................................... 42
8.2 Connecting..................................................................................................................... 43

3
Contents
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
8.3 Sensor parameter adjustment........................................................................................ 44
9 Maintenanceandfaultrectication...................................................................................... 45
9.1 Maintenance .................................................................................................................. 45
9.2 Rectify faults................................................................................................................... 45
9.3 Exchanging the electronics module................................................................................ 47
9.4 How to proceed if a repair is necessary.......................................................................... 48
10 Dismount................................................................................................................................. 49
10.1 Dismounting steps.......................................................................................................... 49
10.2 Disposal ......................................................................................................................... 49
11 Supplement ............................................................................................................................ 50
11.1 Technical data ................................................................................................................ 50
11.2 Dimensions .................................................................................................................... 55
11.3 Industrial property rights................................................................................................. 57
11.4 Trademark ...................................................................................................................... 57
Editing status: 2020-09-24

4
1 About this document
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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
VEGACAL 64 is a sensor for continuous 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.
The EU conformity declaration can be found on our homepage.

6
2 For your safety
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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 43 – Signal level for fault information from measuring transduc-
ers
• NE53–Compatibilityofelddevicesanddisplay/adjustment
components
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 Safety instructions for Ex areas
For Ex applications, only devices with corresponding Ex approval may
beused.ObservetheEx-specicsafetyinstructions.Thesearean
integral part of the operating instructions and are enclosed with every
device with Ex approval.
2.9 Environmental instructions
Protection of the environment is one of our most important duties.
That is why we have introduced an environment management system
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
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• Level sensor VEGACAL 64
The further scope of delivery encompasses:
• Documentation
– Operating instructions VEGACAL 64
– Safety Manual (SIL)
– 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 from 1.3.0
• OnlyforinstrumentversionswithoutSILqualication
The VEGACAL 64 consists of the components:
• Processttingwithprobe
• Housing with electronics
• Housing lid
1
2
3
Fig. 1: VEGACAL 64, rod version with plastic housing
1 Housing lid
2 Housing with electronics
3 Processtting
Scope of delivery
Scope of this operating
instructions
Constituent parts

8
3 Product description
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
2
1
11
13
12
14
15
10
9
3
6
4
5
7
8
Fig. 2: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Process and ambient temperature, process pressure
5 Power supply and signal output, electronics
6 Protection rating
7 Probe length
8 Order number
9 Serial number of the instrument
10 Material wetted parts
11 Symbol of the device protection class
12 Reminder to observe the instrument documentation
13 ID numbers, instrument documentation
14 NotiedauthorityforCEmarking
15 Approval directives
With the serial number, you can access the delivery data of the instru-
ment via " www.vega.com", " Search".Youcanndtheserialnumber
on the inside of the instrument as well as on the type label on the
outside.
The type label contains the serial number of the instrument. With it
youcanndthefollowinginstrumentdataonourhomepage:
• Product code (HTML)
• Delivery date (HTML)
• Order-specicinstrumentfeatures(HTML)
• Operating instructions and quick setup guide at the time of ship-
ment (PDF)
• Order-specicsensordataforanelectronicsexchange(XML)
• Testcerticate(PDF)-optional
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 DataMatrix code on the type label of the instrument or
• Enter the serial number manually in the app
Type label
Serial number - Instru-
ment search

9
3 Product description
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
3.2 Principle of operation
The VEGACAL 64 is a level sensor for conductive and non-conductive
liquids.
The rod probe is fully insulated and suitable for all viscous and adhe-
sive products.
Probe, measured product and vessel wall form an electrical capacitor.
Thecapacitanceisinuencedbythreemainfactors.
1
2
3
Fig. 3: Functional principle - Plate capacitor
1 Distance between the electrode surfaces
2 Size of the electrode surfaces
3 Type of dielectric between the electrodes
The probe and the vessel wall are the capacitor plates.The measured
product and the insulation are the dielectric. Due to the higher dielec-
tric constant of the insulation and the conductive product compared to
air, the capacitance increases as the probe is gradually covered.
The capacitance as well as the resistance change are converted by
the electronics module into a level-proportional signal.
4 … 20 mA/HART two-wire electronics for voltage supply and meas-
ured value transmission on the same cable.
Thesupplyvoltagerangecandierdependingontheinstrument
version.
Thedataforpowersupplyarespeciedinchapter"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.
Theexactvoltagespecicationsarestatedinchapter"Technical
data".
Theoptionalheatingrequiresitsownvoltagesupply.Youcannd
further details in the supplementary instructions manual " Heating for
display and adjustment module".
This function is generally not available for approved instruments.
3.3 Adjustment
The instrument can be adjusted with the following adjustment media:
• With the display and adjustment module
Application area
Functional principle
Voltage supply

10
3 Product description
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
• with the suitable VEGA DTM in conjunction with an adjustment
software according to the FDT/DTM standard, e.g. PACTware and
PC
• Withmanufacturer-specicadjustmentprogramsAMS™orPDM
• 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 in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter " Supplement -
Technical data - Ambient conditions"
• Relative humidity 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and
approved equipment must be used for lifting and carrying.
3.5 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.
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
Lifting and carrying
PLICSCOM

11
3 Product description
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC.
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics®sensors.
VEGADIS 82 is suitable for measured value indication and adjustment
of sensors with HART protocol. It is looped into the 4 … 20 mA/HART
signal cable.
The PLICSMOBILE T81 is an external GSM/GPRS/UMTS radio unit
for transmission of measured values and for remote parameter adjust-
ment of HART sensors.
If the standard sensor housing is too big or in case of strong vibra-
tions, an external housing can be used.
Then the sensor housing is made of stainless steel. The electronics is
located in the external housing which can be mounted in a distance of
up to 10 m (32.8 ft) to the sensor by using a connection cable.
Threedierentexternalsensorhousingsareavailable.
3
A
1
2
Fig. 4: External housing
A Instrument housing
1 Sensor housing, stainless steel (316L), IP68 (10 bar)
2 Sensor housing, stainless steel (316L), IP67
3 Sensor housing, stainless steel (316L), BNC plug IP54
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.
Therearedierentreasonsfortheuseofascreeningtubeadapter.
VEGACONNECT
VEGADIS 81
VEGADIS 82
PLICSMOBILE T81
External housing
Protective cover
Flanges
Screening tube adapter

12
3 Product description
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Condensation
In case of strong condensation, the draining of condensed water
can change the measurement accuracy. The suitable version is the
Shielding against condensation.Thecondensationcandraino
outside on the shielding tube adapter.
Typical applications of the screening tube adapters are e.g. for
condensationornozzles.Apartfromthestandardversion,thereis
a second version for vacuum with a sepcial seal. When the screen-
ing tube adapter is submerged in liquid, we recommend the use of a
vacuum-tight version.
Nozzle
Incaseoflongnozzles,theshieldingtubecanincreasethesensitivity
oftheprobebycompensatingtheinuencesofthenozzle.Thesuit-
able version is Capacitive shielding, vacuum-tight.
When the probe is mounted laterally, buildup can accumulate in the
nozzle.Ascreeningtubemakesthecoveredpartoftheprobeinactive
andhenceinsensitivetoinuencefrombuildupandnozzle.Hence,
thescreeningtubeadapterexcludeschanginginuencescausedby
the medium and ensures stable measurement conditions. The suit-
able version is Capacitive screening, vacuum-tight.

13
4 Mounting
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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
Select an installation position you can easily reach for mounting and
connectingaswellaslaterretrottingofadisplayandadjustment
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
dierentpositions(eachdisplacedby90°).
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.
Before beginning the welding work, remove the electronics module
from the sensor. By doing this, you avoid damage to the electronics
through inductive coupling.
Ground the probe before welding directly on the rod or cable.
With threaded versions, the housing must not be used to screw in the
instrument! Applying tightening forces on the housing can damage its
internal parts.
Use the hexagon for screwing in.
Use the recommended cables (see chapter " Connecting to power
supply") and tighten the cable gland.
Process conditions
Installation position
Screwing in
Welding work
Handling
Protection against mois-
ture

14
4 Mounting
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cablegland.Rainandcondensationwatercanthusdraino.This
applies 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.
To maintain the housing protection, make sure that the housing lid is
closed during operation and locked, if necessary.
Fig. 5: Measures against moisture ingress
Theprocessttingmustbesealedifthereisgaugeorlowpressure
in the vessel. Before use, check if the sealing material is resistant
against the measured product and the process temperature.
Themax.permissiblepressureisspeciedinchapter"Technical
data" or on the type label of the sensor.
Insulatingmeasures,suchase.g.coveringthethreadwithteontape,
can interrupt the necessary electrical connection with metal vessels.
For this reason, ground the probe on the vessel or use a conductive
seal material.
Metal vessel
Make sure that the mechanical connection of the probe to the vessel
iselectricallyconductivetoensuresucientgrounding.
Use conductive seals, such as those made of copper or lead, etc.
Insulatingmeasures,suchascoveringthethreadwithTeontape,
can interrupt the necessary electrical connection with metal vessels.
For this reason, ground the probe on the vessel or use a conductive
seal material.
Non-conductive vessels
In non-conductive vessels, e.g. plastic tanks, the second pole of the
capacitor must be provided separately.
If possible, the capacitive probe should be mounted vertically or par-
allel to the counter electrode.This applies particularly to applications
in non-conductive products.
In cylindrical tanks, spherical tanks or other asymmetrical tank forms,
nonlinear level values are generated due to the varying distance to
the vessel wall.
Pressure/Vacuum
Vessel material
Vessel shapes

15
4 Mounting
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Useaconcentrictubeinnon-conductiveproductsorlinearizethe
meas. signal.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory.They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory.The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
4.2 Mounting instructions
During operation, the probe must not touch any installations or the
vessel wall. The measured value can also change if the distance to
the vessel wall changes considerably. If necessary, secure the end of
the probe (insulated).
1
2
1
2
Fig. 6: Fasten the probe
1 Measuring probe
2 Plastic socket
In vessels with conical bottom it can be advantageous to mount the
sensor in the centre of the vessel, as measurement is then possible
down to the bottom.
Iftheinstrumentismountedinthellingstream,unwantedfalse
measurement signals can be generated. For this reason, mount the
instrument at a position in the vessel where no disturbances, e.g. from
llingopenings,agitators,etc.,canoccur.
This applies particularly to instrument versions with a longer probe.
Cable entries - NPT
thread
Cable glands
Installation position
Inowingmedium

16
4 Mounting
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Fig.7:Inowingmedium

17
5 Connecting to power supply
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
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.
Power supply and current signal are carried on the same two-wire
cable.Theoperatingvoltagecandierdependingontheinstrument
version.
Thedataforpowersupplyarespeciedinchapter"Technical data".
Provide a reliable separation between the supply circuit and the
mains circuits according to DIN EN 61140 VDE 0140-1.
Power the instrument via an energy-limited circuit acc. to IEC 61010-
1, e.g. via Class 2 power supply unit.
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")
The instrument is connected with standard two-wire cable without
shielding. If electromagnetic interference is expected which is above
the test values of EN 61326-1 for industrial areas, shielded cable
should be used.
Use cable with round cross section for instruments with housing and
cable gland. Use a cable gland suitable for the cable diameter to
ensurethesealeectofthecablegland(IPprotectionrating).
We generally recommend the use of shielded cable for HART
multidrop mode.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory.They are sealed with plastic
plugs as transport protection.
Note:
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory.The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Safety instructions
Voltage supply
Connection cable
Cable glands

18
5 Connecting to power supply
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Note:
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
On plastic housings, the NPT cable gland or the Conduit steel tube
must be screwed into the threaded insert without grease.
Max. torque for all housings, see chapter " Technical data".
If shielded cable is required, we recommend connecting the cable
screening on both ends to ground potential. In the sensor, the cable
screening must be connected directly to the internal ground terminal.
The ground terminal on the outside of the housing must be connected
to the ground potential (low impedance).
In Ex systems, the grounding is carried out according to the installa-
tion regulations.
In electroplating plants as well as plants for cathodic corrosion protec-
tionitmustbetakenintoaccountthatsignicantpotentialdierences
exist.This can lead to unacceptably high currents in the cable screen
if it is grounded at both ends.
Note:
Themetallicpartsoftheinstrument(processtting,sensor,concen-
tric tube, etc.) are connected with the internal and external ground
terminal on the housing.This connection exists either directly via
the conductive metallic parts or, in case of instruments with external
electronics, via the screen of the special connection cable.
Youcanndspecicationsonthepotentialconnectionsinsidethe
instrument in chapter "Technical data".
5.2 Connection procedure
Proceed as follows:
1. Unscrew the housing lid
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 gland and remove blind
plug
4. Remove approx. 10 cm (4 in) of the cable mantle, strip approx.
1 cm (0.4 in) of insulation from the ends of 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

19
5 Connecting to power supply
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
Fig. 8: Connection steps 6 and 7
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 shielding to the internal ground terminal, connect the
external ground terminal to potential equalisation
11. Tighten the compression nut of the cable entry gland. The seal
ring must completely encircle the cable
12. Screw the housing lid back on
Theelectricalconnectionisnished.
5.3 Wiring plan, single chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
1 2
4
3
5
5
55
Fig. 9: Material versions, single chamber housing
1 Plastic
2 Aluminium
3 Stainless steel (precision casting)
4 Stainless steel (electro-polished)
5 Filter element for air pressure compensation of all material versions. Blind
plug with version IP66/IP68, 1 bar for Aluminium and stainless steel
Housing overview

20
5 Connecting to power supply
VEGACAL 64 • Two-wire 4 … 20 mA/HART
30030-EN-200929
I²C
Display
12 5678
3
4
1
2
Fig. 10: Electronics and connection compartment - single chamber housing
1 Plug connector for VEGACONNECT (I²C interface)
2 Spring-loaded terminals for connection of the external indication VEGADIS
81
3 Ground terminal for connection of the cable screening
4 Spring-loaded terminals for voltage supply
I2C
Display
1
12 5678
Fig. 11: Wiring plan - single chamber housing
1 Voltage supply, signal output
5.4 Wiring plan, double chamber housing
The following illustrations apply to the non-Ex as well as to the Ex-ia
version.
Electronics and connec-
tion compartment
Wiring plan