Vega VEGAPULS 62 User manual

Operating Instructions
Radar sensor for continuous level
measurement of liquids
VEGAPULS 62
4 … 20 mA/HART - two-wire
Approval according to LPR radio standard
Document ID: 41718

2
Contents
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
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 CE conformity................................................................................................................... 6
2.6 NAMUR recommendations .............................................................................................. 6
2.7 Radio license for Europe .................................................................................................. 6
2.8 Radio license for USA/Canada......................................................................................... 7
2.9 Environmental instructions ............................................................................................... 7
3 Product description
3.1 Conguration.................................................................................................................... 8
3.2 Principle of operation........................................................................................................ 9
3.3 Packaging, transport and storage................................................................................... 10
3.4 Accessories and replacement parts ............................................................................... 10
4 Mounting
4.1 General instructions ....................................................................................................... 13
4.2 Mounting preparations - Horn antenna........................................................................... 13
4.3 Mounting instructions ..................................................................................................... 14
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 26
5.2 Connecting..................................................................................................................... 27
5.3 Wiring plan, single chamber housing.............................................................................. 28
5.4 Wiring plan, double chamber housing ............................................................................ 29
5.5 Wiring plan, double chamber housing Ex dia ................................................................ 31
5.6 Double chamber housing with DIS-ADAPT .................................................................... 32
5.7 Wiring plan - version IP 66/IP 68, 1 bar........................................................................... 33
5.8 Switch-on phase............................................................................................................. 33
6 Set up with the display and adjustment module
6.1 Insert display and adjustment module............................................................................ 34
6.2 Adjustment system......................................................................................................... 35
6.3 Parameter adjustment .................................................................................................... 36
6.4 Saving the parameter adjustment data........................................................................... 50
7 Setup with PACTware
7.1 Connect the PC.............................................................................................................. 51
7.2 Parameter adjustment .................................................................................................... 52
7.3 Saving the parameter adjustment data........................................................................... 53
8 Set up with other systems
8.1 DD adjustment programs ............................................................................................... 54
8.2 Field Communicator 375, 475 ........................................................................................ 54
9 Diagnosis, asset management and service

3
Contents
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
9.1 Maintenance .................................................................................................................. 55
9.2 Diagnosis memory ......................................................................................................... 55
9.3 Asset Management function........................................................................................... 56
9.4 Rectify faults................................................................................................................... 59
9.5 Exchanging the electronics module................................................................................ 63
9.6 Software update ............................................................................................................. 63
9.7 How to proceed if a repair is needed.............................................................................. 64
10 Dismounting
10.1 Dismounting steps.......................................................................................................... 65
10.2 Disposal ......................................................................................................................... 65
11 Supplement
11.1 Technical data ................................................................................................................ 66
11.2 Radio astronomy stations............................................................................................... 74
11.3 Dimensions .................................................................................................................... 75
Safety instructions for Ex areas
PleasenotetheEx-specicsafetyinformationforinstallationandop-
eration in Ex areas. These safety instructions are part of the operating
instructions manual and come with the Ex-approved instruments.
Editing status: 2014-01-28

4
1 About this document
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
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-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
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 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
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
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
VEGAPULS 62 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 the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and guidelines. The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsible
for the trouble-free operation 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.
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.
The safety approval markings and safety tips on the device must also
be observed.
Depending on the instrument version, the emitting frequencies are in
the C or K band range. The low emitting frequencies are far below the
internationally approved limit values. When used correctly, there is no
danger to health.

6
2 For your safety
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
2.5 CE conformity
ThedevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByaxingtheCEmarking,weconrmsuccessfultestingofthe
product.
YoucanndtheCECerticateofConformityinthedownloadsection
of our homepage.
Electromagnetic compatibility
Instruments in four-wire or Ex-d-ia version are designed for use in an
industrial environment. Nevertheless, electromagnetic interference
from electrical conductors and radiated emissions must be taken into
account, as is usual with class A instruments according to EN 61326-
1.Iftheinstrumentisusedinadierentenvironment,theelectromag-
netic compatibility to other instruments must be ensured by suitable
measures.
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llstherequirementsofthefollowingNAMURrecom-
mendations:
•NE 21 – Electromagnetic compatibility of equipment
•NE 43 – Signal level for malfunction information from measuring
transducers
•NE53–Compatibilityofelddevicesanddisplay/adjustment
components
•NE107–Self-monitoringanddiagnosisofelddevices
For further information see www.namur.de.
2.7 Radio license for Europe
The instrument meets the LPR (Level Probing Radar) radio standard
EN 302729-1/2.
It is approved for unrestricted use inside and outside of closed ves-
sels in countries of the EU and EFTA that have implemented this
standard:
Austria, Belgium, Bulgaria, Germany, Denmark, Estonia, France,
Greece, Great Britain, Ireland, Island, Italy, Liechtenstein, Lithuania,
Latvia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania,Sweden,Switzerland,Slovakia,Slovenia,Spain,Czech
Republik and Cyprus.
NotincludedintheCEconrmitydeclarationarethecountriesimple-
menting this radio standard at a later date:
Finland and Hungary.
For operation outside of closed vessels, the following conditions must
befullled:
•Theinstallationmustbecarriedoutbytrainedqualiedpersonnel

7
2 For your safety
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
•The instrument must be stationary mounted and the antenna
directed vertically downward
•The mounting location must be at least 4 km away from the radio
astronomy stations, unless special permission was granted by the
responsible national approval authority
•When installed within 4 to 40 km of a radio astronomy station,
the instrument must not be mounted higher than 15 m above the
ground.
Youcanndalistwiththerespectiveradioastronomystationsin
chapter "Supplement".
2.8 Radio license for USA/Canada
The instrument is in conformity with part 15 of the FCC regulations.
Take note of the following two regulations:
•The instrument must not cause any interfering emissions
•The device must be insensitive to interfering immissions, including
those that may cause undesirable operating conditions
Modicationsnotexpresslyapprovedbythemanufacturerwillleadto
expiry of the operating licence according to FCC/IC.
The instrument is in conformity with RSS-210 of the IC regulations.
The instrument may only be used in closed vessels made of metal,
concrete,orbre-reinforcedplastic.
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llthisobligationbyobservingtheenvironmental
instructions in this manual:
•Chapter "Packaging, transport and storage"
•Chapter "Disposal"

8
3 Product description
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
3 Product description
3.1 Conguration
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
2
1
14
15
16
17
13
12
11
5
3
6
4
7
8
9
10
Fig. 1: Layout of the type label (example)
1 Instrument type
2 Product code
3 Approvals
4 Power supply and signal output, 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 Data-Matrix-Code for Smartphone-App
13 Symbol of the device protection class
14 ID numbers, instrument documentation
15 Reminder to observe the instrument documentation
16 NotiedauthorityforCEmarking
17 Approval directive
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
Go to www.vega.com, "VEGATools" and "Instrument search". Enter
the serial number.
Alternatively, you can access the data via your smartphone:
Type label
Serial number - Instru-
ment search

9
3 Product description
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
•Download the smartphone app "VEGATools" from the "Apple App
Store" or the "GooglePlayStore"
•Scan the Data Matrix code on the type label of the instrument or
•Enter the serial number manually in the app
This operating instructions manual applies to the following instrument
versions:
•Hardware from 1.0.0
•Software from 4.4.0
The scope of delivery encompasses:
•Radar sensor
•Documentation
– Quick setup guide VEGAPULS 62
–Testcerticatemeasuringaccuracy(optional)
– Operating instructions manual "Display and adjustment mod-
ule" (optional)
– Supplementary instructions "GSM/GPRSradiomodule"
(optional)
– Supplementary instructions manual "Heating for display and
adjustment module" (optional)
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (optional)
–Ex-specic"Safety instructions" (with Ex versions)
–ifnecessary,furthercerticates
•DVD "Software & Documents", containing
– Operating instructions
– Safety instructions
– PACTware/DTM-Collection
– Driver software
3.2 Principle of operation
The VEGAPULS 62 radar sensor can be used in a wide variety of ap-
plications for continuous level measurement of liquids. It is suitable for
applications in storage vessels, reactors and process vessels, even
underextremelydicultprocessconditions.
The instrument is ideal also for all applications in the water and waste
water industry. It is particularly suitable for level measurement in water
treatment,inpumpstationsaswellasstormwateroverowtanks,for
owmeasurementinopenumesandforgaugemeasurement.
The antenna of the radar sensor emits short radar pulses with a
durationofapprox.1ns.Thesepulsesarereectedbytheproduct
and received by the antenna as echoes. The transit time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an appropri-
ate output signal and outputted as measured value.
Scope of this operating
instructions manual
Scope of delivery
Application area
Functional principle

10
3 Product description
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
3.3 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 %
3.4 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 or the external display and adjustment unit and removed at
any time.
Youcanndfurtherinformationintheoperatinginstructions"Display
and adjustment module PLICSCOM" (Document-ID 27835).
The interface adapter VEGACONNECT enables the connection of
communication-capable instruments to the USB interface of a PC. For
parameter adjustment of these instruments, the adjustment software
PACTware with VEGA-DTM is required.
Youcanndfurtherinformationintheoperatinginstructions"Interface
adapterVEGACONNECT" (Document-ID 32628).
The VEGADIS 81 is an external display and adjustment unit for VEGA
plics® sensors.
Packaging
Transport
Transport inspection
Storage
Storage and transport
temperature
PLICSCOM
VEGACONNECT
VEGADIS 81

11
3 Product description
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
For sensors with double chamber housing the interface adapter "DIS-
ADAPT" is also required for VEGADIS 81.
Youcanndfurtherinformationintheoperatinginstructions"VE-
GADIS81" (Document-ID 43814).
The adapter "DIS-ADAPT" is an accessory part for sensors with
double chamber housings. It enables the connection of VEGADIS 81
to the sensor housing via an M12 x1 plug.
Youcanndfurtherinformationinthesupplementaryinstructions
"AdapterDISADAPT" (Document-ID 45250).
VEGADIS 62 is suitable for measured value indication and adjustment
of sensors with HART protocol. It is looped into the 4 …20 mA/HART
signal cable.
Youcanndfurtherinformationintheoperatinginstructions"VE-
GADIS62" (Document-ID 36469).
The PLICSMOBILE T61 is an external GSM/GPRS radio unit for
transmission of measured values and for remote parameter adjust-
ment of plics® sensors. The adjustment is carried out via PACTware/
DTM by using the integrated USB connection.
Youcanndfurtherinformationinthesupplementaryinstructions
"PLICSMOBILET61" (Document-ID 37700).
The PLICSMOBILE is an internal GSM/GPRS radio unit for transmis-
sion of measured values and for remote parameter adjustment of
plics® sensors. The adjustment is carried out via PACTware/DTM by
using the integrated USB connection.
Youcanndfurtherinformationinthesupplementaryinstructions
"PLICSMOBILEGSM/GPRSradiomodule" (Document-ID 36849).
The protective cover protects the sensor housing against soiling and
intense heat from solar radiation.
Youwillndadditionalinformationinthesupplementaryinstructions
manual "Protective cover" (Document-ID 34296).
Screwedangesareavailableindierentversionsaccordingtothe
following standards: DIN 2501, EN 1092-1, BS 10, ANSI B16.5,
JIS B2210-1984, GOST 12821-80.
Youcanndadditionalinformationinthesupplementaryinstructions
manual "FlangesaccordingtoDIN-EN-ASME-JIS" (Document-ID
31088).
The electronics module VEGAPULS series 60 is a replacement part
forradarsensorsofVEGAPULSseries60.Thereisadierentversion
available for each type of signal output.
Youcanndfurtherinformationintheoperatinginstructions"Elec-
tronicsmoduleVEGAPULSseries60" (Document-ID 36801).
DIS-ADAPT
VEGADIS 62
PLICSMOBILE T61
PLICSMOBILE
Protective cap
Flanges
Electronics module

12
3 Product description
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
The supplementary electronics is a replacement part for sensors with
double chamber housing and 4 …20 mA/HART - two-wire.
Youcanndfurtherinformationintheoperatinginstructions"Supple-
mentaryelectronicsfor4…20mA/HART-two-wire" (Document-ID
42764).
The antenna impedance cone is a replacement part used for optimum
transmission of microwaves and for sealing against the process.
Youndfurtherinformationintheoperatinginstructions"Antenna
impedanceconeVEGAPULS62and68" (Document-ID 31381).
Supplementary electron-
ics for double chamber
housing
Antenna impedance cone

13
4 Mounting
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
4 Mounting
4.1 General instructions
Oninstrumentswithprocessttingthread,thehexagonmustbetight-
enedwithasuitablescrewdriver.Wrenchsizeseechapter"Dimen-
sions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Protect your instrument against moisture penetration through the fol-
lowing measures:
•Use the recommended cable (see chapter "Connecting to power
supply")
•Tighten the cable gland
•Turn the housing in such a way that the cable gland points down-
ward
•Loop the connection cable downward in front of the cable gland
This applies particularly to:
•Outdoor mounting
•Installations in areas where high humidity is expected (e.g. through
cleaning processes)
•Installations on cooled or heated vessels
Make sure that all parts of the instrument exposed to the process are
suitable for the existing process conditions.
These are mainly:
•Active measuring component
•Processtting
•Process seal
Process conditions are particularly:
•Process pressure
•Process temperature
•Chemical properties of the medium
•Abrasionandmechanicalinuences
Youcanndthespecicationsoftheprocessconditionsinchapter
"Technicaldata" as well as on the type label.
4.2 Mounting preparations - Horn antenna
The instrument is also available in versions with an antenna whose
diameterislargerthantheprocesstting(thread,ange).Insuch
casestheantennamustbedisconnectedfromtheprocesstting
before mounting. Proceed as follows:
1. Loosen the hexagon socket screws (3) on the antenna socket
withanAllenwrench(size3)
2. Remove the antenna (4)
Screwing in
Protection against mois-
ture
Suitability for the process
conditions

14
4 Mounting
VEGAPULS 62 • 4 … 20 mA/HART - two-wire
41718-EN-140209
Note:
The plastic cone may not be pulled out of the antenna socket.
3. Insert the antenna from below into the vessel socket and secure it
againstfallingo
4. Retighten the antenna with hexagon screws to the antenna
socket; torque max. 2.5 Nm (1.8 lbf ft)
Note:
The radar sensor with rinsing air connection or antenna extension
is provided with a notch on the antenna socket. This notch must be
alignedwiththemarkingontheprocesstting(themarkingspecies
the position of the polarisation of the radar signal).
3
4
1
2
Fig. 2: Dismounting of the horn antenna
1 Marking for the polarisation
2 Marking at the antenna socket
3 Hexagon screws on the antenna socket
4 Antenna
4.3 Mounting instructions
The emitted radar impulses of the radar sensor are electromagnetic
waves. The polarisation is the direction of the electrical wave compo-
nent.Byturningtheinstrumentintheconnectionangeormounting
boss,thepolarisationcanbeusedtoreducetheeectsoffalse
echoes.
Thepositionofthepolarisationismarkedontheprocessttingofthe
instrument.
Polarisation

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41718-EN-140209
12
Fig. 3: Position of the polarisation
1 Marking with screwed version
2 Markingwithangeversion
When mounting the sensor, keep a distance of at least 200 mm
(7.874 in) from the vessel wall. If the sensor is installed in the center
of dished or round vessel tops, multiple echoes can arise. However,
these can be suppressed by an appropriate adjustment (see chapter
"Setup").
If you cannot maintain this distance, you should carry out a false
signal storage during setup. This applies particularly if buildup on the
vessel wall is expected. In such a case, it is recommended to repeat
the false signal storage at a later date with existing buildup.
> 200 mm
(7.87
")
Fig. 4: Mounting of the radar sensor on round vessel tops
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
down to the lowest point of the vessel bottom.
Installation position

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Fig. 5: Mounting of the radar sensor on vessels with conical bottom
Donotmounttheinstrumentsinorabovethellingstream.Makesure
thatyoudetecttheproductsurface,nottheinowingproduct.
Fig.6:Mountingoftheradarsensorwithinowingmedium
The socket piece should be dimensioned in such a way that the
antenna end protrudes slightly out of the socket.
ca. 10 mm
Fig. 7: Recommended socket mounting with horn antenna
Inowingmedium
Socket

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41718-EN-140209
When using a swivelling holder, keep in mind that the distance
between antenna and socket gets smaller as the inclination of the
sensorincreases.Additionalfalsereectionsmaybegeneratedwhich
caninuencethemeasuringresultatcloserange.
Fig. 8: Distance between antenna and socket with horn antenna
Ifthemediumhasgoodreectiveproperties,VEGAPULS62with
horn antenna can also be mounted on a longer socket piece. Rec-
ommendedvaluesforsocketheightsarespeciedinthefollowing
illustration. You must carry out a false echo storage afterwards.
d
hmax.
Fig. 9: Deviating socket dimensions
Socket diameter d Socket length h Recommended anten-
na diameter
80 mm ≤300mm 75 mm
100 mm ≤400mm 95 mm
150 mm ≤500mm 95 mm
Socket diameter d Socket length h Recommended anten-
na diameter
3" ≤11.8in 75 mm
4" ≤15.8in 95 mm
6" ≤19.7in 95 mm
Tip:
The instrument is also optionally available with an antenna extension.
The antenna length can be selected (either ex works or later) to allow
the antenna to protrude slightly out of the end of the mounting socket.

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Duetotheantennaextensioninthecloserange,falsereections
can be caused. This can lead to an increase in the required minimum
distance,especiallywithpoorlyreectingmediasuchasplasticpow-
der. In practice, a cleanly constructed mounting socket, if necessary
withroundededges,introducesfewerdisturbinginuencesthanan
antenna extension.
In liquids, direct the sensor as perpendicular as possible to the prod-
uct surface to achieve optimum measurement results.
Fig. 10: Alignment in liquids
The mounting location of the radar sensor should be a place where no
otherequipmentorxturescrossthepathofthemicrowavesignals.
Vessel installations, such as e.g. ladders, limit switches, heating spi-
rals, struts, etc., can cause false echoes and impair the useful echo.
Make sure when planning your measuring site that the radar sensor
has a "clear view" to the measured product.
In case of existing vessel installations, a false echo storage should be
carried out during setup.
If large vessel installations such as struts or supports cause false
echoes, these can be attenuated through supplementary measures.
Small,inclinedsheetmetalbaesabovetheinstallationsscatterthe
radarsignalsandpreventdirectinterferingreections.
Fig.11:Coversmoothproleswithdeectors
If there are agitators in the vessel, a false signal suppression should
be carried out with the agitators in motion. This ensures that the
interferingreectionsfromtheagitatorsaresavedwiththebladesin
dierentpositions.
Sensor orientation
Vessel installations
Agitators

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Fig. 12: Agitators
Throughtheactionoflling,stirringandotherprocessesinthevessel,
compact foams that considerably damp the emitted signals may form
on the product surface.
If foams are causing measurement errors, the biggest possible radar
antennas, the electronics with increased sensitivity or low frequency
radar sensors (C band) should be used.
As an alternative, sensors with guided microwave can be used. These
areunaectedbyfoamgenerationandarebestsuitedforsuchap-
plications.
Whenusingasurgepipeinavessel,inuencesfromvesselinstalla-
tions and turbulences can be excluded. Under these prerequisites,
themeasurementofproductswithlowdielectricvalues(εr value
≥1.6)ispossible.Inveryadhesiveproducts,measurementinasurge
pipe is not recommended.
Foam generation
Measurement in a surge
pipe

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41718-EN-140209
0%
100%
1
2
3
1
2
3
4
5
8
6
7
9
Fig.13:Congurationsurgepipe
1 Radar sensor
2 Marking for the polarisation
3 Threadorangeontheinstrument
4 Vent hole
5 Holes
6 Weld joint
7 Weldingneckange
8 Ball valve with complete opening
9 Fastening of the surge pipe
Instructions for orientation:
•Note marking of the polarisation on the sensor
•Withthreadedtting,themarkingisonthehexagon,withange
connectionbetweenthetwoangeholes
•The marking must show to the direction of the holes in the surge
pipe
Instructions for the measurement:
•The 100 % point must be below the upper vent hole and the
antenna edge
•The 0 % point is the end of the surge pipe
•For the parameter adjustment, select "Application standpipe" and
enter the tube diameter to compensate errors due to running time
shift
•A false signal suppression with integrated sensor is recommended
but not mandatory