VEGA FLEX82 User Manual

Operating Instructions

TDR sensor for continuous level
measurement of bulk solids

VEGAFLEX 82

4 … 20 mA/HART - four-wire

Document ID: 41830

Quick start

Mounting

Electrical connection

Quick start

The quick start procedure enables a quick setup with many applica-

tions. You can nd further information in the respective chapters of the

operating instructions manual.

1. Distance from the metallic vessel wall > 300 mm. Distance from
non-metallic vessel wall > 500 mm. The probe must not touch any
installations or the vessel wall.

2. Place a metal sheet beneath the process tting with non-metal
vessels.

1 2

Fig. 1: Installation in plastic silo

1 Flange
2 Metal sheet

3. If necessary, fasten probe end.

For further information see chapter "Mounting".

1. Make sure that the power supply corresponds to the specica­tions on the type label.

2. Connect the instrument according to the following illustration

Set parameters

2

4...20mA

power supply

( )

+

(-)

1

2

/L
/N

PE

5

active

67 8

passive

common

IS GND

Fig. 2: Connection compartment with double chamber housing with mains
voltage

For further information see chapter "Connecting to power supply".

For standard applications we recommend selecting the "Quick setup"
in the display and adjustment module.

1. In this menu item you can select the application.

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

41830-EN-130314

Quick start

2. In the menu item "Medium - Dielectric constant" you can dene
the medium type (medium).

3. Carry out the adjustment in the menu items "Min. adjustment" and
"Max. adjustment".

4. A "Linearization" is required for all vessels in which the vessel vol-

ume does not increase linearly with the level - e.g. in a horizontal
cylindrical or spherical tank. Activate the appropriate curve.

5. A "False signal suppression" detects, marks and saves the false
signals so that they are no longer taken into account for level

measurement. We generally recommend a false signal suppres­sion.

Parameterization example

The sensor measures the distance from the sensor (reference plane)
to the product surface.

Fig. 3: Measuring ranges - VEGAFLEX 82

1 Reference plane
2 Probe length L
3 Measuring range
4 Upper dead band (in this area no measurement is possible)
5 Lower dead band (in this area no measurement is possible)

For this adjustment, the distance is entered when the vessel is full
and nearly empty. If these values are not known, an adjustment with

other distances, for example, 10 % and 90 % is also possible. Starting

point for these distance specications is always the seal surface of
the thread or ange.

Further steps

1. In the menu "Additional settings", menu item "Damping" you can
adjust the requested damping of the output signal.

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

1

4

2

3

5

2

1

4

3

5

3

Quick start

2. Select the parameter of the current output and the output charac­teristics in the menu item "Current output".

You can nd additional information in chapter "Parameter adjustment".

41830-EN-130314

4

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

Contents

1 About this document

1.1 Function ............................................................................. 7

1.2 Target group ....................................................................... 7

1.3 Symbolism used ................................................................. 7

2 For your safety

2.1 Authorised personnel ......................................................... 8

2.2 Appropriate use .................................................................. 8

2.3 Warning about incorrect use ............................................... 8

2.4 General safety instructions ................................................. 8

2.5 CE conformity ..................................................................... 8

2.6 NAMUR recommendations ................................................ 9

2.7 Environmental instructions ................................................. 9

3 Product description

3.1 Conguration .................................................................... 10

3.2 Principle of operation ........................................................ 11

3.3 Packaging, transport and storage ..................................... 12

3.4 Accessories and replacement parts ................................. 12

4 Mounting

4.1 General instructions ......................................................... 15

4.2 Instructions for installation ................................................ 15

5 Connecting to power supply

5.1 Preparing the connection ................................................. 20

5.2 Connection ....................................................................... 21

5.3 Wiring plan, double chamber housing .............................. 23

5.4 Switch-on phase ............................................................... 24

6 Set up with the display and adjustment module

6.1 Insert display and adjustment module .............................. 25

6.2 Adjustment system ........................................................... 26

6.3 Parameter adjustment - Quick setup ................................ 27

6.4 Parameter adjustment - Extended adjustment .................. 30

6.5 Saving the parameter adjustment data ............................. 43

7 Setup with PACTware

7.1 Connect the PC ................................................................ 45

7.2 Parameter adjustment with PACTware .............................. 46

7.3 Set up with the quick setup ............................................... 47

7.4 Saving the parameter adjustment data ............................. 50

8 Set up with other systems

8.1 DD adjustment programs ................................................. 51

8.2 Communicator 375, 475 ................................................... 51

9 Diagnostics and service

9.1 Maintenance .................................................................... 52

9.2 Diagnosis memory ........................................................... 52

9.3 Status messages .............................................................. 53

9.4 Rectify faults ..................................................................... 56

9.5 Exchanging the electronics module .................................. 59

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VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

Contents

5

Contents

9.6 Exchange or shorten cable/rod......................................... 60

9.7 Software update ............................................................... 61

9.8 How to proceed in case of repair ...................................... 62

10 Dismounting

10.1 Dismounting steps ............................................................ 63

10.2 Disposal ........................................................................... 63

11 Supplement

11.1 Technical data .................................................................. 64

11.2 Dimensions ...................................................................... 75

41830-EN-130314

Safety instructions for Ex areas

Please note the Ex-specic safety information for installation and op­eration in Ex areas. These safety instructions are part of the operating

instructions manual and come with the Ex-approved instruments.

Editing status: 2013-03-11

6

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

1 About this document

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 instruc­tions for maintenance and fault rectication. 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 specialist

personnel. The contents of this manual should be made available to

these personnel and put into practice by them.

1.3 Symbolism used

Information, tip, note

This symbol indicates helpful additional information.

Caution: If this warning is ignored, faults or malfunctions can result.

Warning: If this warning is ignored, injury to persons and/or serious

damage to the instrument can result.

Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.

Ex applications

This symbol indicates special instructions for Ex applications.

List

•

The dot set in front indicates a list with no implied sequence.

Action

→

This arrow indicates a single action.

1 Sequence

Numbers set in front indicate successive steps in a procedure.

Battery disposal

This symbol indicates special information about the disposal of bat­teries and accumulators.

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

7

2 For your safety

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

VEGAFLEX 82 is a sensor for continuous level measurement.
You can nd detailed information on the application range 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 regula­tions.

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.

2.5 CE conformity

The device fullls the legal requirements of the applicable EC guide­lines. By axing the CE marking, we conrm successful testing of the

product.

You can nd the conformity certicate in the download section of our

homepage.

8

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

41830-EN-130314

2 For your safety

Electromagnetic compatibility

Instruments with plastic housing as well as 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 a
class A instrument according to EN 61326-1. If the instrument is used

in a dierent environment, the electromagnetic 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 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 pro­tection. 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"

•

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

9

3 Product description

Type plate

3 Product description

3.1 Conguration

The nameplate contains the most important data for identication and

use of the instrument:

1

2

3
4

5
6

7
8
9

10

Fig. 4: 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 Probe length
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 Symbol of the device protection class
13 ID numbers, instrument documentation
14 Note to observe the instrument documentation

15 NotiedauthorityforCEmarking

16 Approval directive

16
15

14
13

12

11

Serial number

Scope of this operating
instructions manual

10

With the serial number of the instrument on the type label you have

access to the following data on our homepage:

Article number of the instrument (HTML)

•

Delivery date (HTML)

•

Order-specic instrument features (HTML)

•

Operating instructions at the time of shipment (PDF)

•

Order-specic sensor data for an electronics exchange (XML)

•

Test certicate "Measuring Accuracy" (PDF)

•

For this purpose, move to www.vega.com and "VEGA Tools".

This operating instructions manual applies to the following instrument

versions:

Hardware from 1.0.0

•

Software from 1.0.0

•

Only for instrument versions without SIL qualication

•

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

41830-EN-130314

3 Product description

Versions

Scope of deliv

Application ar

Functional principle ­level measurement

ery

ea

The instrument can be supplied in two dierent electronics versions.
Each electronics version can be identied via the product code on the

type label as well as on the electronics.

Standard electronics with operating voltage 90 … 253 V AC;

•

50/60 Hz: Typ FX80B.­Standard electronics with supply voltage 9.6 … 48 V DC;

•

20 … 42 V AC: Type FX80I.-

The scope of delivery encompasses:

Sensor

•

Documentation

•

– this operating instructions manual
– 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

3.2 Principle of operation

The VEGAFLEX 82 is a level sensor with cable or rod probe for con­tinuous level measurement, suitable for applications in bulk solids.

High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reected. The running time is evaluated by the instrument and output­ted as level.

Probe end tracking

To increase sensitivity, the probe is equipped with probe end tracking.
In products with a low dielectric constant, this function is very helpful.

This is the case, for example, in plastic granules, packing chips or in

uidized vessels.
Between a dielectric constant of 1.5 and 3, the function switches on, if

required. As soon as the level echo can no longer be detected, probe
end tracking is automatically activated. The measurement is contin-

ued with the last calculated dielectric constant.

The accuracy thus depends on the stability of the dielectric constant.

If you measure a medium with a dielectric constant below 1.5, probe
end tracking is always active. In this case, you have to enter the
dielectric constant of the medium. A stable dielectric constant is very

important here.

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

11

3 Product description

Packaging

T

ranspor

t

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 environment­friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised

recycling companies.

Transport must be carried out under consideration of the notes on the

transport packaging. Nonobservance of these instructions can cause
damage to the device.

Transport inspection

Storage

Storage and transport
temperature

Display and adjustment
module

Interface adapter

The delivery must be checked for completeness and possible transit

damage immediately at receipt. Ascertained transit damage or con­cealed 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, an adjustment software
such as PACTware with VEGA-DTM is required.

You can nd further information in the operating instructions "Interface
adapter VEGACONNECT" (Document-ID 32628).

41830-EN-130314

External display and
adjustment unit

12

VEGADIS 61 is an external display and adjustment unit for sensors

with single chamber housing and Ex-d double chamber housing.

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

3 Product description

It is suitable for measured value indication and adjustment of plics®

sensors and is connected to the sensor with a four-wire standard

cable up to 50 m (164 ft) long.
You can nd further information in the operating instructions "VE-

GADIS 61" (Document-ID 27720).

External display and ad­justment unit with HART
protocol

External r

adio unit

Protective cover

Flanges

Electronics module

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 "VE­GADIS 62" (Document-ID 36469).

The PLICSMOBILE T61 is an external GSM/GPRS radio unit for

transmission 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 T61" (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, ANSI B 16.5, JIS B 2210-

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 VEGAFLEX series 80 is a replacement part

for TDR sensors of VEGAFLEX series 80. There is a dierent version
available for each type of signal output.

You can nd further information in the operating instructions manual

"Electronics module VEGAFLEX series 80".

Display and adjustment
module with heating

The display and adjustment module can be optionally replaced by a

display and adjustment module with heating function.

You can hence use the display and adjustment module in an ambient
temperature range of -40 … 70 °C.

You can nd further information in the operating instructions "Display
and adjustment module with heating" (Document-ID 31708).

Rod extension

If you are using an instrument with rod version, you can extend the
rod probe individually with curved segments and rod extensions of
dierent lengths.

All extensions used must not exceed a total length of 6 m (19.7 ft).

The extensions are available in the following lengths:

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

13

3 Product description

Rod: ø 16 mm (0.63 in)

Basic segments: 20 … 5900 mm (0.79 … 232 in)

•

Rod segments: 20 … 5900 mm (0.79 … 232 in)

•

Curved segments: 100 x 100 mm (3.94 … 3.94 in)

•

You can nd further information in the operating instructions manual

"Rod extension VEGAFLEX series 80".

Spacer

If you mount the VEGAFLEX 82 in a bypass tube or standpipe, you

have to avoid contact to the bypass tube by using a spacer at the

probe end.

You can nd further information in the operating instructions manual

"Bypass tube VEGAPASS 81".

14

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

Screwing in

4 Mounting

4 Mounting

4.1 General instructions

With instruments with threaded process tting, suitable tools must be

applied for tightening the hexagon.

Warning:

The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.

Moisture

Protective caps

Suitability for the process
conditions

Installation position

Use the recommended cables (see chapter "Connecting to power
supply") and tighten the cable gland.

You can give your instrument additional protection against moisture

penetration by leading the connection cable downward in front of the
cable entry. Rain and condensation water can thus drain o. This ap­plies mainly to:

outdoor mounting

•

installations in areas where high humidity is expected (e.g. through

•

cleaning processes)

installations on cooled or heated vessels

•

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
openings for the cable glands are therefore covered with red protec­tive caps as transport protection.

Prior to setup you have to replace these protective caps with ap­proved cable glands or close the openings with suitable blind plugs.

The suitable cable glands and blind plugs come with the instrument.

Make sure that all parts of the instrument exposed to the process, in

particular the active measuring component, process seal and process
tting, are suitable for the existing process conditions. These include
above all the process pressure, process temperature as well as the

chemical properties of the medium.
You can nd the specications in chapter "Technical data" and on the

nameplate.

4.2 Instructions for installation

Mount VEGAFLEX 82 in such a way that the distance to vessel instal­lations or to the vessel wall is at least 300 mm (12 in). In non-metallic
vessels, the distance to the vessel wall should be at least 500 mm

(19.7 in).

During operation, the probe must not touch any installations or the

vessel wall. If necessary, fasten the probe end.
In vessels with conical bottom it can be advantageous to mount the

sensor in the center of the vessel, as measurement is then possible

nearly down to the lowest point of the bottom. Keep in mind that
measurement all the way down to the tip of the probe may not be pos-

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

15

4 Mounting

sible. The exact value of the min. distance (lower dead band) is stated

in chapter "Technical data".

Fig. 5: Vessel with conical bottom

Type of vessel

Plastic vessel/Glass vessel

The guided microwave principle requires a metal surface on the pro­cess tting. Therefore use in plastic vessels etc. an instrument version
with ange (from DN 50) or place a metal sheet (ø > 200 mm/8 in)
beneath the process tting when screwing it in.

Make sure that the plate has direct contact with the process tting.
When installing rod or cable probes without metal vessel wall, e.g.

in plastic vessels, the measured value can be inuenced by strong
electromagnetic elds (emitted interference according to EN 61326:

class A).

Use a probe in coax version for applications in liquids.

1 2

Fig. 6: Installation in non-metal vessel

1 Flange
2 Metal sheet

41830-EN-130314

16

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

4 Mounting

dh

Concrete vessel

When installed in thick concrete ceilings, VEGAFLEX 82 should be

mounted front ush to the lower edge. In concrete silos, the distance
to the wall should be at least 500 mm (20 in).

ø >160mm

(ø >6.3")

Fig. 7: Installation in concrete silo

Socket

If possible, avoid sockets. Mount the sensor ush with the vessel top.

If this is not possible, use short sockets with small diameter.

Higher sockets or sockets with a bigger diameter can generally be
used. They simply increase the upper blocking distance. Check if this

is relevant for your measurement.

In such cases, always carry out a false signal suppression after instal-

lation. You can nd further information under "Setup procedure".

Fig. 8: Mounting socket

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

_

DN40 ... DN150

> DN150 ... DN200

d

h

<

150

_

<

100

17

4 Mounting

When welding the socket, make sure that the socket is ush to the
vessel top.

1 2

Fig.9:Socketmustbeinstalledush

1 Unfavourable installation

2 Socketush-optimuminstallation

Welding work

Inowingmedium

Measuring range

Before beginning the welding work, remove the electronics module
from the sensor. By doing this, you avoid damage to the electronics
through inductive coupling.

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.10:Mountingofthesensorwithinowingmedium

The reference plane for the measuring range of the sensors is the

sealing surface of the thread or ange.

Keep in mind that a min. distance must be maintained below the refer­ence plane and possibly also at the end of the probe - measurement
in these areas is not possible (dead band). The length of the cable

can be used all the way to the end only when measuring conductive

41830-EN-130314

18

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

4 Mounting

products. These blocking distances for dierent mediums are listed

in chapter "Technical data". Keep in mind for the adjustment that the
default setting for the measuring range refers to water.

Pressure

Fixing

R

od extensions

The process tting must be sealed if there is gauge or low pressure in

the vessel. Before use, check if the seal 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.

If there is a danger of the cable probe touching the vessel wall during
operation due to product movements or agitators etc., the measuring
probe should be securely xed.

In the gravity weight there is an internal thread (M12), e.g. for an eye-

bolt (optional) - (article no. 2.27423).

Make sure that the probe cable is not completely taut. Avoid tensile

loads on the cable.

Avoid undened vessel connections, i.e. the connection must be
either grounded reliably or isolated reliably. Any undened change of

this requirement can lead to measurement errors.

In case of dicult installation conditions, for example in a socket, the
probe can be adapted respectively with a rod extension.

Let the probe length determine automatically by the instrument to
compensate the resulting running time changes.

You can nd further information in the supplementary instructions of

the rod extension.

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VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

19

5 Connecting to power supply

Safety instructions

5 Connecting to power supply

5.1 Preparing the connection

Always keep in mind the following safety instructions:

Connect only in the complete absence of line voltage

•

If overvoltage surges are expected, overvoltage arresters should

•

be installed

Voltage supply via mains
voltage

Voltage supply via low
voltage

Connection cable

In this case, the instrument is designed in protection class II. To main­tain this protection class, it is absolutely necessary that the ground
conductor be connected to the internal ground terminal. Take note of
the general installation regulations.

Supply voltage and current signal are carried on separate connection
cables if reliable separation is required. The supply voltage range can
dier depending on the instrument version.

The data for power supply are specied in chapter "Technical data".

In this case, the instrument is designed in protection class II. Gener-

ally connect the instrument to vessel ground (potential equalization)
or with plastic vessels to the next ground potential. For this purpose, a

ground terminal is located laterally on the instrument housing.

An approved, three-wire installation cable with PE conductor is
required for voltage supply with mains voltage.

The 4 … 20 mA current output is connected with standard two-wire
cable without screen. If electromagnetic interference is expected

which is above the test values of EN 61326-1 for industrial areas,

screened cable should be used.

For instruments with housing and cable gland, use cable with round

cross-section. To ensure the seal eect of the cable gland (IP protec­tion rating), you have to check for which cable outer diameter the

cable gland is suitable.

5 … 9 mm (0.20 … 0.35 in)

•

6 … 12 mm (0.24 … 0.47 in)

•

10 … 14 mm (0.40 … 0.55 in)

•

Use a cable gland tting the cable diameter.

Cable gland ½ NPT

Cable screening and
grounding

20

With plastic housing, the NPT cable gland or the Conduit steel tube

must be screwed without grease into the threaded insert.

Max. torque for all housings see chapter "Technical data".

If screened cable is necessary, connect the cable screen on both
ends to ground potential. In the sensor, the screen must be connected
directly to the internal ground terminal. The ground terminal on the
outside of the housing must be connected to the potential equalisa­tion (low impedance).

If potential equalisation currents are expected, the connection on the

processing side must be made via a ceramic capacitor (e. g. 1 nF,
1500 V). The low-frequency potential equalisation currents are thus

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

41830-EN-130314

Connection technology

5 Connecting to power supply

suppressed, but the protective eect against high frequency interfer-

ence signals remains.

Warning:

Signicant potential dierences exist inside galvanization plants as
well as on vessels with cathodic corrosion protection. Considerable
equalisation currents can ow over the cable screen if the screen is

grounded on both ends.
To avoid this in such applications, the cable screen must be connect-

ed to ground potential only at one end (in the switching cabinet). The
cable screen must not be connected to the internal ground terminal in
the sensor and the outer ground terminal on the housing must not be
connected to the potential equalisation!

Information:

The metallic parts of the instrument (process tting, transmitter, con­centric tube, etc.) are conductively connected with the inner and outer

ground terminal on the housing. This connection exists either directly

via connecting 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

The voltage supply and signal output are connected via the spring-

loaded terminals in the housing.

The connection to the display and adjustment module or to the inter-

face adapter is carried out via contact pins in the housing.

Information:

The terminal block is pluggable and can be removed from the elec­tronics. To do this, lift the terminal block with a small screwdriver and

pull it out. When inserting the terminal block again, you should hear it
snap in.

Connection procedure

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

Proceed as follows:

1. Unscrew the housing cover

2. If a display and adjustment module is installed, remove it by turn-

ing it slightly to the left.

3. Loosen compression nut of the cable entry

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

21

5 Connecting to power supply

Fig. 11: Connection steps 5 and 6

6. Insert the wire ends into the terminals according to the wiring plan

Information:

Solid cores as well as exible cores with wire end sleeves are
inserted directly into the terminal openings. In case of exible cores
without end sleeves, press the terminal head with a small screwdriver;
the terminal opening is freed. When the screwdriver is released, the

terminal closes again.

You can nd further information on the max. wire cross-section under

"Technical data/Electromechanical data"

7. Check the hold of the wires in the terminals by lightly pulling on
them

8. Connect the screen to the internal ground terminal, connect the
outer ground terminal to potential equalisation

9. Tighten the compression nut of the cable entry. The seal ring must
completely encircle the cable

10. Place probably existing display and adjustment module back on

11. Screw the housing cover back on

The electrical connection is hence nished.

22

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

2

Electronics compartment

Connection compartment
with mains voltage

5 Connecting to power supply

5.3 Wiring plan, double chamber housing

The following illustrations apply to the non-Ex as well as to the Ex-d

version.

4...20mA

( )

+

(-)

1

2

1

Fig. 12: Electronics compartment, double chamber housing

1 Internal connection to the connection compartment
2 For display and adjustment module or interface adapter

Information:

The connection of an external display and adjustment unit is not pos­sible with this double chamber housing.

567

4...20mA

8

Fig. 13: Connection compartment with double chamber housing with mains
voltage

Terminal Function Polarity

1 Voltage supply +/L

2 Voltage supply -/N

5

6

7 Mass - output -

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

power supply

( )

+

(-)

1

2

/L
/N

PE

5

4 … 20 mA output (active) +

4 … 20 mA output (passive) +

active

passive

67 8

common

IS GND

23

5 Connecting to power supply

Connection compartment

w v

with lo

oltage

Terminal Function Polarity

8 Function ground with installa-

tion according to CSA

4...20mA

power supply

( )

+

(-)

1

2

/L

/N

Fig. 14: Connection compartment with double chamber housing with low volt­age

Terminal Function Polarity

1 Voltage supply +/L

2 Voltage supply -/N

5

6

7 Mass - output -

8 Function ground with installa-

4 … 20 mA output (active) +

4 … 20 mA output (passive) +

tion according to CSA

active

5

common

passive

67 8

IS GND

5.4 Switch-on phase

After connecting the instrument to power supply or after a voltage

recurrence, the instrument carries out a self-check for approx. 30 s:

Internal check of the electronics

•

Indication of the instrument type, hardware and software version,

•

measurement loop name on the display or PC
Indication of the status message "F 105 Determine measured

•

value" on the display or PC
The output signal jumps to the set error current

•

As soon as a plausible measured value is found, the corresponding
current is outputted to the signal cable. The value corresponds to the
actual level as well as the settings already carried out, e.g. factory

setting.

24

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

6 Set up with the display and adjustment module

6 Set up with the display and adjustment

module

6.1 Insert display and adjustment module

The display and adjustment module can be inserted into the sensor
and removed any time. Four positions displaced by 90° can be se­lected. It is not necessary to interrupt the power supply.

Proceed as follows:

1. Unscrew the housing cover

2. Place the display and adjustment module in the requested posi­tion onto the electronics and turn to the right until it snaps in

3. Screw housing cover with inspection window tightly back on

Removal is carried out in reverse order.

The display and adjustment module is powered by the sensor, an ad­ditional connection is not necessary.

Fig. 15: Insertion of the display and adjustment module with single chamber
housing into the electronics compartment

41830-EN-130314

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

25

6 Set up with the display and adjustment module

Fig. 16: Insertion of the display and adjustment module with double chamber
housing

1 In the electronics compartment
2 In the connection compartment (with Ex-d-ia version not possible)

Note:

If you intend to retrot the instrument with a display and adjustment
module for continuous measured value indication, a higher cover with

an inspection glass is required.

6.2 Adjustment system

1 2

Key functions

26

Fig. 17: Display and adjustment elements

1 LC display
2 Adjustment keys

[OK] key:

•

– Move to the menu overview
– Conrm selected menu
– Edit parameter

VEGAFLEX 82 • 4 … 20 mA/HART - four-wire

1

2

41830-EN-130314