Vega VEGADIF 85 Operating instructions

Operating Instructions

Dierential pressure transmitter with

metallic measuring diaphragm

VEGADIF 85

4 … 20 mA

Document ID: 53566

2

Contents

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

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 NAMUR recommendations .............................................................................................. 6

2.6 Installation and operation in the USA and Canada ........................................................... 6

2.7 Environmental instructions ............................................................................................... 6

3 Product description ................................................................................................................. 7

3.1 Conguration

.................................................................................................................... 7

3.2 Principle of operation........................................................................................................ 8

3.3 Packaging, transport and storage ................................................................................... 11

3.4 Accessories.................................................................................................................... 11

4 Mounting ................................................................................................................................. 13

4.1 General instructions ....................................................................................................... 13

4.2 Instructions for oxygen applications ............................................................................... 15

4.3 Mounting and connection instructions ............................................................................ 15

4.4 Measurement setup level ............................................................................................... 19

4.5 Measurementsetup,ow ............................................................................................... 21

4.6 Measurementsetupdierentialpressure ....................................................................... 23

4.7 Measurement setup, density .......................................................................................... 25

4.8 Measurement setup, interface ........................................................................................ 26

4.9 External housing ............................................................................................................ 27

5 Connecting to power supply ................................................................................................. 28

5.1 Preparing the connection ............................................................................................... 28

5.2 Connecting ..................................................................................................................... 29

5.3 Single chamber housing ................................................................................................. 30

5.4 Housing IP 66/IP 68 (1 bar) ............................................................................................ 31

5.5 ExternalhousingwithversionIP68(25bar)................................................................... 32

5.6 Switch-onphase............................................................................................................. 33

6 Set up the sensor with the display and adjustment module ............................................. 34

6.1 Insert display and adjustment module ............................................................................ 34

6.2 Adjustment system ......................................................................................................... 35

6.3 Measured value indication .............................................................................................. 36

6.4 Parameter adjustment - Quick setup .............................................................................. 37

6.5 Parameter adjustment - Extended adjustment................................................................ 37

6.6 Saving the parameterisation data ................................................................................... 53

7 Set up measuring system ..................................................................................................... 54

7.1 Level measurement ........................................................................................................ 54

7.2 Flowmeasurement ......................................................................................................... 56

8 Diagnosis, asset management and service ........................................................................ 58

3

Contents

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

8.1 Maintenance .................................................................................................................. 58

8.2 Diagnosis memory ......................................................................................................... 58

8.3 Asset Management function ........................................................................................... 59

8.4 Rectify faults ................................................................................................................... 61

8.5 Exchange process module on version IP 68 (25 bar) ..................................................... 62

8.6 Exchanging the electronics module ................................................................................ 63

8.7 Softwareupdate ............................................................................................................. 64

8.8 Howtoproceedifarepairisnecessary .......................................................................... 64

9 Dismount................................................................................................................................. 65

9.1 Dismounting steps.......................................................................................................... 65

9.2 Disposal ......................................................................................................................... 65

10 Supplement ............................................................................................................................ 66

10.1 Technical data ................................................................................................................ 66

10.2 Calculation of the total deviation ..................................................................................... 76

10.3 Calculation of the total deviation - Practical example ...................................................... 77

10.4 Dimensions, versions process component ..................................................................... 78

10.5 Industrial property rights ................................................................................................. 83

10.6 Trademark ...................................................................................................................... 83

Safety instructions for Ex areas

TakenoteoftheExspecicsafetyinstructionsforExapplications.

These instructions are attached as documents to each instrument

withExapprovalandarepartoftheoperatinginstructions.

Editing status: 2019-08-09

4

1 About this document

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

1 About this document

1.1 Function

This operating instructions provides all the information you need for

mounting,connectionandsetupaswellasimportantinstructionsfor

maintenance,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.

→

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

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

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

VEGADIF85isaninstrumentformeasurementofow,level,dieren-

tial pressure, density and interface.

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.

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.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 and their meaning read in this oper-

ating instructions manual.

6

2 For your safety

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

2.5 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

•

NE107–Self-monitoringanddiagnosisofelddevices

For further information see www.namur.de.

2.6 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

AClass2powersupplyunithastobeusedfortheinstallationinthe

USA and Canada.

2.7 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

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

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

7

5

6

3

4

Fig. 1: Layout of the type label (example)

1 Instrument type

2 Product code

3 Field for approvals

4 Technical data

5 Serial number of the instrument

6 Data matrix code for VEGA Tools app

7 Reminder to observe the instrument documentation

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 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1.3.4

Type label

Serial number - Instru-

ment search

Scope of this operating

instructions

8

3 Product description

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

Note:

Youcanndthehardwareandsoftwareversionoftheinstrumentas

follows:

•

On the type plate of the electronics module

•

In the adjustment menu under "Info"

The scope of delivery encompasses:

•

Pressure transmitter

•

Documentation

– Quick setup guide VEGADIF 85

– Characteristicstestcerticate

– Instructions for optional instrument features

– Ex-specic"Safety instructions"(withExversions)

– Ifnecessary,furthercerticates

Note:

Optional instrument features are also described in this operating

instructions manual. The respective scope of delivery results from the

orderspecication.

3.2 Principle of operation

The VEGADIF 85 is an instrument used universally for measurement

of liquids, gases and vapours. Typical applications are level meas-

urementsinpressurizedvesselsaswellasowmeasurementsin

combinationwithDPowelements.Furtherapplicationsarepressure

monitoringonltersaswellasdensityandinterfacemeasurements.

The VEGADIF 85 is suitable for level measurement in closed, pressur-

izedvessels.Thestaticpressureiscompensatedviathedierential

pressure measurement.

Fig. 2: Level measurement with VEGADIF 85 in a pressurized vessel

TheowmeasurementiscarriedoutviaaDPowelement,suchas

anoriceorpitottube.TheVEGADIF85detectsthepressuredier-

enceandconvertsthemeasuredvalueintotheowvalue.

Scope of delivery

Application area

Level measurement

Flow measurement

9

3 Product description

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

Q

p

1

p

2

+

–

Fig. 3: Flow measurement with VEGADIF 85 and orice, Q = ow, dierential

pressure Δp = p

1

- p

2

Thepressuresintwodierentpipelinesareacquiredviaeective

pressurelines.VEGADIF85determinesthedierentialpressure.

+

p

12

p

Fig. 4: Measurement of the dierential pressure in pipelines with VEGADIF 85,

dierential pressure Δp = p

1

- p

2

Withthehelpoftheinstrument,densitymeasurementinavesselwith

changing level and homogeneous density distribution can be easily

realized.Theinstrumentisconnectedtothevesselviaachemical

sealattwodierentmeasuringpoints.

+

–

Fig. 5: Density measurement with VEGADIF 85

Dierentialpressure

measurement

Density measurement

10

3 Product description

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

The instrument can also be used for interface measurement in a ves-

selwithchanginglevel.Theinstrumentisconnectedtothevesselvia

achemicalsealattwodierentmeasuringpoints.

+

–

Fig. 6: Interface measurement with VEGADIF 85

A metallic measuring cell is used as sensor element. The process

pressuresaretransmittedviatheseparatingdiaphragmsandlling

oilstoapiezoresistivesensorelement(resistancemeasuringbridge

using semiconductor technology).

Thedierencebetweentheactingpressureschangesthebridgevolt-

age. This change is measured, further processed and converted into

a corresponding output signal.

When measurement limits are exceeded, an overload system protects

the sensor element against damage.

In addition, the measuring cell temperature and the static pressure

aremeasuredonthelowpressureside.Themeasuringsignalsare

further processed and are available as additional output signals.

P P

5

4

66

3

2

1

Fig. 7: Conguration metallic measuring cell

1 Filling uid

2 Temperature sensor

3 Absolute pressure sensor, static pressure

4 Overload system

5 Dierential pressure sensor

6 Separating diaphragm

Interface measurement

Functional principle

11

3 Product description

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

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 consists of environment-friendly, recyclable card-

board. For special versions, PE foam or PE foil is also used. Dispose

of the packaging material via specialised recycling companies.

Caution:

Instruments for oxygen applications are sealed in PE foil and provided

withalabel"Oxygen!UsenoOil".Removethisfoiljustbeforemount-

ingtheinstrument!Seeinstructionunder"Mounting".

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.

3.4 Accessories

Theinstructionsforthelistedaccessoriescanbefoundinthedown-

load area under www.vega.com.

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.

The interface adapter VEGACONNECT enables the connection of

communication-capable instruments to the USB interface of a PC.

Packaging

Transport

Transport inspection

Storage

Storage and transport

temperature

Lifting and carrying

PLICSCOM

VEGACONNECT

12

3 Product description

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

The VEGADIS 82 is suitable for measured value indication of

4 … 20 mA and 4 … 20 mA/HART sensors. It is looped into the signal

cable.

The overvoltage arrester B81-35 is used instead of the terminals in

the single or double chamber housing.

The protective cover protects the sensor housing against soiling and

intense heat from solar radiation.

The suitable mounting accessories for VEGADIF 85 include oval

angeadapters,valveblocksaswellasmountingbrackets.

Through the use of chemical seals, VEGADIF 85 can also be used for

corrosive, highly viscous or hot media.

VEGADIS 82

Overvoltage pr

otection

Protective cover

Mounting accessories

Chemical seal

13

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

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.

Make sure before mounting 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 in particular are:

•

Process pressure

•

Process temperature

•

Chemical properties of the medium

•

Abrasionandmechanicalinuences

Thepermissibleprocesspressurerangeisspeciedonthetypelabel

with"MWP"(MaximumWorkingPressure),seechapter"Congura-

tion".Thisspecicationreferstoareferencetemperatureof+25°C

(+76°F).TheMWPmayalsobepermanentlyappliedononeside.

In order to prevent damage to the device, a test pressure acting on

bothsidesmayonlyexceedthespeciedMWPbrieyby1.5times

atreferencetemperature.Thepressurestageoftheprocessttingas

wellastheoverloadresistanceofthemeasuringcellaretakeninto

consideration here (see chapter "Technical Data").

Inaddition,atemperaturederatingoftheprocesstting,e.g.with

angeisolatingdiaphragms,canlimitthepermissibleprocesspres-

sure range according to the respective standard.

Protectyourinstrumentagainstmoistureingressthroughthefollowing

measures:

•

Use a suitable connection cable (see chapter "Connecting to

power supply")

•

Tighten the cable gland or plug connector

•

Leadtheconnectioncabledownwardinfrontofthecableentryor

plug connector

Thisappliesmainlytooutdoorinstallations,inareaswherehigh

humidity is expected (e.g. through cleaning processes) and on cooled

or heated vessels.

Note:

Makesurethatthedegreeofcontaminationspeciedinchapter

"Technical data" meets the existing ambient conditions.

Process conditions

Permissible process

pressure (MWP)

Protection against mois-

ture

14

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

Note:

Make sure that during installation or maintenance no moisture or dirt

can get inside the instrument.

To maintain the housing protection, make sure that the housing lid is

closed during operation and locked, if necessary.

Theventilationfortheelectronicshousingisrealisedviaalterele-

ment in the vicinity of the cable glands.

1 2 3

6

6 6

6

5

4

Fig. 8: Position of the lter element - non-Ex, Ex-ia and Ex-d-ia version

1 Plastic, stainless steel single chamber (precision casting)

2 Aluminium - single chamber

3 Stainless steel single chamber (electropolished)

4 Plastic double chamber

5 Aluminium, stainless steel double chamber housing (precision casting)

6 Filter element

Information:

Makesurethatthelterelementisalwaysfreeofbuildupduringop-

eration. A high-pressure cleaner may not be used for cleaning.

Forbetterreadabilityofthedisplayoraccesstothewiring,theelec-

tronicshousingcanberotatedby330°.Astoppreventsthehousing

from being turned too far.

Dependingontheversionandhousingmaterial,thelockingscrewon

the neck of the housing must be slightly loosened. The housing can

then be turned to the correct position. As soon as the requested posi-

tionisreached,tightenthelockingscrew.

DPowelementsarecalculatedforcertainpipelineandoperating

data. Therefore, check the pipeline data before installation at the

measuring point and compare the measurement loop number.

Ventilation

Turning the housing

DPowelement

15

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

DetailedinstructionsformountingtheDPowelementsarestatedin

theappropriatestandardsaswellasintheinstrumentdocumentation

from the respective manufacturer.

Whenwiringtheeectivepressurelinesoutdoors,makesurethat

youuseasuitableantifreeze,e.g.byusingaheattracing.Wirethe

eectivepressurelineswithamonotonousgradientofatleast10%.

Eectivepressurelinesforgasesmustremaindry,condensatemust

beavoided.Eectivepressurelinesforliquidsmustbecompletely

lledandventilated.

Generalrecommendationsforwiringofeectivepressurelinesare

stated in the corresponding national and international standards.

Valvesareusedasshut-odevicewhenconnectingtotheprocessas

wellasforpressureequalisationofthemeasuringchambersduring

setup.

3-foldand5-foldvalveblocksaswellasvalveblocksforang-

ing on one or both sides are available "Mounting and connection

instructions").

If there is strong vibration at the mounting location, the instrument

versionwithexternalhousingshouldbeused.Seechapter"External

housing".

Higher process temperatures often mean also higher ambient

temperatures. Make sure that the upper temperature limits stated in

chapter "Technical data" for the environment of the electronics hous-

ing and connection cable are not exceeded.

4.2 Instructions for oxygen applications

Oxygenandothergasescanbeexplosivewhenbroughtintocontact

withoils,greaseandplastics,sothefollowingmeasuresmustalsobe

taken:

•

All components of the system, e.g. measuring instruments, must

becleanedinaccordancewiththerequirementsofrecognized

regulations or standards

•

Depending on the seal material, certain temperatures and pres-

sures must not be exceeded in oxygen applications, see chapter

"Technical data"

Danger:

Instruments for oxygen applications must be unpacked just before

mounting.Afterremovingtheprotectivecoveroftheprocesstting,

the label "O

2

"willbevisibleontheprocesstting.Penetrationofoil,

greaseanddirtshouldbeavoided.Dangerofexplosion!

4.3 Mounting and connection instructions

Thefollowingillustrationshowstheconnectionofa3-foldvalveblock.

Eectivepressurelines

Valve blocks

Vibrations

Temperature limits

Oxygen applications

3-fold valve block

16

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

A:

A

2 2

1

3 45

Fig. 9: Connection of a 3-fold valve block

1 Process tting

2 Process tting

3 Inlet valve

4 Inlet valve

5 Breather valve

Thefollowingillustrationshowstheconnectionofthe3-foldvalve

block,angingonbothsides.

Note:

Nomountingbracketisrequiredforvalveblocksthatcanbeange-

mounted on both sides. The process side of the valve block is

mounteddirectlytoaDPowelement,e.g.anoriceplate.

3-foldvalveblock-ang-

ing on both sides

17

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

A:

A

2 2

13 45

Fig. 10: Connection of a 3-fold valve block, anging on both sides

1 Process tting

2 Process tting

3 Inlet valve

4 Inlet valve

5 Breather valve

Thefollowingillustrationshowstheconnectionofthe5-foldvalve

block.

5-fold valve block

18

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

A:

A

2 2

1

4

7

3 5

6

Fig. 11: Connection of a 5-fold valve block

1 Process tting

2 Process tting

3 Inlet valve

4 Breather valve

5 Inlet valve

6 Valve for checking/ventilating

7 Valve for checking/ventilating

When connecting VEGADIF 85 to the measuring point, take note of

thehigh/lowpressuresideoftheprocesscomponent.

1)

.

The "H

"identiesthehighpressureside,thelowpressuresidedueto

an "L"ontheprocesscomponentnexttotheovalanges.

2

1

H L

Fig. 12: Marking for high/low pressure side on the process component

H High pressure side

L Low pressure side

Connection high/low

pressure side

1)

 Thepressureeectiveon"H"isconsideredaspositive,thepressureeec-

tiveon"L"asnegativeinthecalculationofthepressuredierence.

19

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

4.4 Measurement setup level

•

MountVEGADIF85belowthelowermeasurementconnectionso

thattheeectivepressurelinesarealwayslledwithliquid

•

Alwaysconnectthelowpressuresideabovethemax.levelinthe

vessel

•

Formeasurementinproductswithsolidcontent,suchase.g.dirty

liquids, the installation of separators and drain valves is recom-

mended. Debris and sediment can thus be collected and removed.

+

–

min.

max.

1

3

4

3

4

5

1

2

Fig. 13: Measurement setup, level measurement in closed vessel

1 Blocking valves

2 VEGADIF 85

3 Precipitator

4 Drain valves

5 3-fold valve block

•

Mount VEGADIF 85 directly to the vessel

•

Alwaysconnectthelowpressuresideabovethemax.levelinthe

vessel

•

Formeasurementinproductswithsolidcontent,suchase.g.dirty

liquids, the installation of separators and drain valves is recom-

mended. Debris and sediment can thus be collected and removed.

In closed vessels with ef-

fective pressur

e lines

In closed vessels with

single chemical seal

20

4 Mounting

VEGADIF 85 • 4 … 20 mA

53566-EN-190819

+

–

max.

min.

1

2

3

4

Fig. 14: Measurement setup, level measurement in closed vessel

1 Blocking valve

2 Precipitator

3 Drain valve

4 VEGADIF 85

•

MountVEGADIF85belowthelowerchemicalseal

•

The ambient temperature should be the same for both capillaries

Information:

Levelmeasurementisonlycarriedoutbetweentheupperedgeofthe

lowerandtheloweredgeoftheupperchemicalseal.

+

–

min.

max.

1

Fig. 15: Measurement setup, level measurement in closed vessel

1 VEGADIF 85

•

MountVEGADIF85belowthelowermeasurementconnectionso

thattheeectivepressurelinesarealwayslledwithliquid

•

Alwaysconnectthelowpressuresideabovethemax.levelinthe

vessel

•

Thecondensatevesselensuresaconstantpressureonthelow

pressure side

•

Formeasurementinproductswithsolidcontent,suchase.g.dirty

liquids, the installation of separators and drain valves is recom-

mended. Debris and sediment can thus be collected and removed.

In closed vessels with

double chemical seal

In closed vessels with

steamlayeringwitheec-

tive pressure line

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Vega VEGADIF 85 Operating instructions

Vega VEGADIF 85 Operating instructions

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