Vega VEGABAR 81 Manuale utente

Process pressure

Pressure transmitter

VEGABAR 81,82,83

Product Information

Contents

2Process pressure –Pressure transmitter

Contents

1Measuring principle .......................................................................................3

2Type overview ...........................................................................................4

3Instrument selection .......................................................................................5

4Selection criteria .........................................................................................6

5Housing overview.........................................................................................7

6Mounting ...............................................................................................8

7Electronics -4…20 mA-two-wire ............................................................................9

8Electronics -4…20 mA/HART -two-wire ......................................................................10

9Electronics -Proﬁbus PA ..................................................................................11

10 Electronics -Foundation Fieldbus ............................................................................12

11 Electronics -Slave sensor for electronic diﬀerential pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

12 Operation .............................................................................................14

13 Dimensions ............................................................................................15

Take note of safety instructions for Ex applications

Please note the Ex speciﬁc safety information which you can ﬁnd on our homepage www.vega.com/downloads under "Approvals"and which

comes with every instrument.In hazardous areas you should take note of the corresponding regulations,conformity and type approval

certiﬁcates of the sensors and power supply units.The sensors must only be operated on intrinsically safe circuits.The permissible electrical

values are stated in the certiﬁcate.

45078-EN-140625

1Measuring principle

1.1Overview

The VEGABAR 81,82 and 83 can be used universally for the measure-

ment of gases,vapours and liquids.The instrument series is designed for

all applications in industrial measurement engineering.The pressure

transmitters are the ideal solution for special as well as standard applica-

tions.Setup and commissioning is always the same.The VEGABAR 81,

82 and 83 oﬀer maximum reliability and operational safety.

1.2Measuring cell technology

VEGABAR 81

The VEGABAR 81 is equipped with a chemical seal system.It consists of

a process diaphragm as well as an isolating liquid.The process dia-

phragm is available in diﬀerent materials.

The process pressure acts on the sensor element via the chemical seal

system and an internal stainless steel diaphragm.The process pressure

causes a resistance change which is converted into a corresponding

output signal and outputted as measured value.

3 4

Fig.1:Conﬁguration of the piezoresistive measuring cell in VEGABAR 81

1Sensor element

2Base element

3Silicone oil ﬁlling

4Process diaphragm

For measuring ranges up to 40 bar,a piezoresistive sensor element with

internal transmission liquid is used,and for measuring ranges 100 bar and

higher,a strain gauge (DMS)sensor element on the back side of the

stainless steel diaphragm (dry)is used.

VEGABAR 82

The sensor element is the CERTEC

measuring cell with front-ﬂush,

abrasion resistant ceramic diaphragm.The hydrostatic pressure of the

medium or the process pressure causes a capacitance change in the

measuring cell via the diaphragm.This change is converted into an ap-

propriate output signal.

16 µm

Fig.2:Conﬁguration of the CERTEC

measuring cell in VEGABAR 82

1Diaphragm

2Soldered glass bond

3Base element

The CERTEC

measuring cell is also equipped with a temperature sen-

sor.The temperature value can be displayed via the display and adjust-

ment module or processed via the signal output.

VEGABAR 83

The process pressure acts via the process diaphragm to the sensor ele-

ment.The process pressure causes a resistance change which is con-

verted into a corresponding output signal and outputted as measured

value.The process diaphragm is available in diﬀerent materials.

For measuring ranges up to 40 bar,a piezoresistive sensor element with

internal transmission liquid is used,and for measuring ranges 100 bar and

higher,a strain gauge (DMS)sensor element on the back side of the

stainless steel diaphragm (dry)is used.

With small measuring ranges or higher temperatures,the METEC

measuring cell is used.It consists of the ceramic-capacitive CERTEC

measuring cell and a special,temperature-compensated chemical seal

system.

4321

Fig.3:Conﬁguration of the METEC

measuring cell in VEGABAR 83

1Process diaphragm

2Isolating liquid

3FeNi adapter

4CERTEC

measuring cell

Measuring principle

Process pressure –Pressure transmitter 3

45078-EN-140625

2Type overview

VEGABAR 81 VEGABAR 82 VEGABAR 83

Measuring cell Piezoresistive/DMS CERTEC

Piezoresistive/strain gauge,METEC

Diaphragm Metal Ceramic Metal

Media gases,vapours and liquids,also

aggressive ones,at high temper-

atures

gases,vapours and liquids,also with

abrasive substances

gas,vapours and liquids,also vis-

cous

Process ﬁtting Thread from ½" or ½NPT

Flanges from DN 20

Boltings,tube isolating diaphragm

each from DN 25

Thread from 1"or ½NPT

Flanges from DN 25

Extension ﬁttings from 1"

Thread from 1"or ½NPT

Flanges from DN 20

Boltings,tube isolating diaphragm

each from DN 25

Material

Process ﬁtting

316L316L,PVDF,Alloy C22,Alloy C276 316L

Diaphragm material 316L,Alloy C276,Tantalum,gold on

316L

ceramic 316Ti,Elgiloy 2.4711,

Alloy C276,gold-coated,gold/rhodi-

um-coated

Measuring cell seal -FKM,EPDM,FFKM -

Isolating liquid Silicone oil,high temperature oil,

halocarbon oil,med.white oil

Dry measuring system Silicone oil,Halocarbon oil

Med.white oil

Measuring range -1…+1000 bar/-100 …+100 MPa

(-14.5…+14500 psig)

-1…+100 bar/-100 …+10 MPa(-

-14.5…+1450 psig)

-1…+1000 bar/-100 …+100 MPa

(-14.5…+14500 psig)

Smallest measuring

range

0.4bar/40 kPa(5.802 psig)0.025 bar/2.5kPa(1.45 psig)0.1bar/10 kPa(1.45 psig)

Process temperature -40 …+400 °C(-40 …+752 °F) -40 …+150 °C(-40 …+302 °F) -40 …+200 °C(-40 …+392 °F)

Smallest deviation <0.2% < 0.05 % < 0.075 %

Signal output 4…20 mA,4…20 mA/HART,Proﬁbus PA,Foundation Fieldbus,Modbus

Interface Digital interface for Slave-Master combination

Indication/Adjustment PLICSCOM,PACTware,VEGADIS 81,VEGADIS 62

Approvals SIL,shipbuilding,ATEX,IEC,overﬁll protection,FM,CSA,GOST

Type overview

4Process pressure –Pressure transmitter

45078-EN-140625

3Instrument selection

Application area

VEGABAR 81

The VEGABAR 81 is a pressure transmitter with chemical seal for pres-

sure and level measurement.The process-adapted chemical seal system

of VEGABAR 81 ensures reliable measurement even in highly corrosive

and hot media.

VEGABAR 82

The VEGABAR 82 pressure transmitter can be used universally for meas-

urement of gases,vapours and liquids.Even materials like sand are no

problem for the abrasion-resistant ceramic measuring cell.The VEGA-

BAR 82 is an economical solution for a multitude of applications in all

areas of industry.

VEGABAR 83

The VEGABAR 83 is a pressure transmitter for pressure measurement of

gases,vapours and liquids in all industries.VEGABAR 83 oﬀers special

advantages for applications with high pressures.

Conﬁguration and housing protection classes

Fig.4:Example of a VEGABAR 82 with connection G1½and plastic housing with

protection IP 66/IP 67

1Housing cover with integrated display and adjustment module (optional)

2Housing with electronics

3Process ﬁtting with measuring cell

Fig.6:Example of a VEGABAR 82 with ﬂange and aluminium housing in protection

IP 66/IP 68,1bar

1Housing cover with integrated display and adjustment module (optional)

2Housing with electronics

3Process ﬁtting with measuring cell

4Cable gland

5Connection cable

Fig.8:Example of a VEGABAR 82 with ﬂange and stainless steel housing with

protection rating IP 68 and external electronics

1Housing cover with integrated display and adjustment module (optional)

2Housing with electronics

3Housing base

4Connection cable

5Process ﬁtting with measuring cell

Measured variables

The pressure transmitters VEGABAR 81,82 and 83 are suitable for meas-

urement of the following process variables:

lProcess pressure

lLevel

Fig.10:Process pressure measurement

In conjunction with a Slave sensor for electronic diﬀerential pressure

measurement,the instruments are also suitable for the measurement of

the following process variables:

lDiﬀerential pressure

lLevel

lFlow

lDensity

lInterface

Fig.11:Diﬀerential pressure measurement via Master-Slave combination

Instrument selection

Process pressure –Pressure transmitter 5

45078-EN-140625

4Selection criteria

VEGABAR

Wear through process Aggressive products ●–●

Abrasive products –●–

Process temperature up to 150 °C(302 °F)● ● ●

200 °C(302 °F)● ● ●

400 °C(752 °F)●– –

Measuring system Dry –●–

Oil-ﬁlled ●–●

Version process ﬁttings Front-ﬂush ● ● ●

Hygienic ● ● ●

Largest measuring range 100 bar (10 MPa)● ● ●

400 bar (40 MPa)●–●

1000 bar (100 MPa)●–●

Smallest measuring range 400 mbar (40 kPa)● ● ●

100 mbar (10 kPa) – ● ●

25 mbar (2,5kPa) – ●–

Vacuum applications up to 1mbar

abs

(100 Pa) – ●–

Suitability for industry-speciﬁc ap-

plications

Aggregates and min-

ing industry

–● ●

Chemical ● ● –

Power generation ● ● –

Foodstuﬀs● ● ●

Metal production –● ●

Oﬀshore ● ● –

Paper ● ● ●

Petrochemical ● ● –

Pharmaceutical ● ● –

Shipbuilding –● ●

Environment and recy-

cling industry

–●–

Water,waste water –●–

Cement industry –● ●

Selection criteria

6Process pressure –Pressure transmitter

45078-EN-140625

5Housing overview

Plastic PBT

Protection rating IP 66/IP 67 IP 66/IP 67

Version Single chamber Double chamber

Application area Industrial environment Industrial environment

Aluminium

Protection rating IP 66/IP 67,IP 66/IP 68 (1bar)IP 66/IP 67,IP 66/IP 68 (1bar)

Version Single chamber Double chamber

Application area Industrial environment with increased

mechanical stress

Industrial environment with increased

mechanical stress

Stainless steel 316L

Protection rating IP 66/IP 67

IP 69K

IP 66/IP 67

IP 66/IP 68 (1bar)

Version Single chamber,electropolished Single chamber,precision casting Double chamber,precision casting

Application area Aggressive environment,food pro-

cessing,pharmaceutical

Aggressive environment,extreme mechanical stress

Separate version

Material Stainless steel 316Lplastic PBT

Stainless steel 316L

Protection rating IP 68 (25 bar)IP 65

IP 66/IP 67

Function Transmitter External electronics

Application area Extremely moist environment Industrial environment

Housing overview

Process pressure –Pressure transmitter 7

45078-EN-140625

6Mounting

Installation position

The instruments function in any installation position.But the installation

position can inﬂuence the measurement,depending on the measuring

system.This can be compensated by a position correction.

It is useful to select an installation position you can easily reach for mount-

ing and connecting as well as later retroﬁtting of an display and adjustment

module.For this purpose,the housing can be rotated by 330°without the

use of any tools.You can also install the indicating and adjustment module

in four diﬀerent positions (each displaced by 90°).

Mounting examples and measurement setups

The following illustrations show mounting examples and measurement

setups.

Process pressure measurement

The VEGABAR measures the pressure in a pipeline.

Fig.12:Process pressure measurement on a pipeline with VEGABAR

Level measurement

The VEGABAR measures the level in a vessel.

Fig.14:Level measurement in a vessel with VEGABAR

Diﬀerential pressure measurement

The VEGABAR measures the pressure diﬀerence between input and

output of a ﬁlter.

Fig.16:Diﬀerential pressure measurement on a ﬁlter with VEGABAR and Slave

sensor

Flow measurement

The VEGABAR measures the ﬂow via the pressure diﬀerence between

the front and back sides of an oriﬁce plate.

Fig.18:Flow measurement through an oriﬁce with VEGABAR and a Slave sensor

Density measurement

VEGABAR measures the density of the medium in a vessel.

Fig.20:Density measurement on a vessel with VEGABAR and Slave sensor

Interface measurement

VEGABAR measures the interface of two liquids in a vessel.

Fig.22:Interface measurement on a vessel with VEGABAR and Slave sensor

Mounting

8Process pressure –Pressure transmitter

45078-EN-140625

7Electronics -4…20 mA-two-wire

Conﬁguration of the electronics

The pluggable electronics is mounted in the electronics compartment of

the instrument and can be exchanged by the user when servicing is re-

quired.The electronics is completely encapsulated to protect against

vibration and moisture.

The terminals for voltage supply as well as the contact pins with I²Cinter-

face for parameter adjustment are located on the upper side of the elec-

tronics.In the double-chamber housing,the terminals are located in the

separate terminal compartment.

Voltage supply

Power supply and current signal are carried on the same two-wire cable.

The operating voltage can diﬀer depending on the instrument version.

You can ﬁnd the data of the voltage supply in chapter "Technical data"in

the operating instructions manual of the respective instrument.

Provide a reliable separation between the supply circuit and the mains

circuits according to DIN EN 61140 VDE 0140-1.

Data of the voltage supply:

lOperating voltage

-9.6…35 V DC

lPermissible residual ripple -Non-Ex,Ex-ia instrument

-for U

12 V DC:≤0.7V

eﬀ

(16 …400 Hz)

-for U

24 V DC:≤1.0V

eﬀ

(16 …400 Hz)

lPermissible residual ripple -Ex-d-ia instrument

-for U

24 V DC:≤1.0V

eﬀ

(16 …400 Hz)

Keep in mind the following additional factors that inﬂuence the operating

voltage:

lLower output voltage of the power supply unit under nominal load (e.g.

with a sensor current of 20.5mAor 22 mAin case of fault)

lInﬂuence of additional instruments in the circuit (see load values in

chapter "Technical data"of the operating instructions of the respective

instrument)

Connection cable

The instrument is connected with standard two-wire cable without screen.

If electromagnetic interference is expected which is above the test values

of EN 61326-1for industrial areas,screened cable should be used.

In the product conﬁgurator of VEGABAR,diﬀerent cable glands are avail-

able.This selection covers all cable diameters in the range of 4…12 mm

(0.16 …0.47 in).

Cable screening and grounding

If screened cable is required,we recommend connecting 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 ground potential

(low impedance).

Connection

Single chamber housing

( ) (-)

6 7 8

4...20mA

Fig.24:Electronics and terminal compartment,single chamber housing

1Voltage supply/Signal output

2For display and adjustment module or interface adapter

3For external display and adjustment unit

4Ground terminal for connection of the cable screen

Electronics -4…20 mA-two-wire

Process pressure –Pressure transmitter 9

45078-EN-140625

8Electronics -4…20 mA/HART -two-wire

Conﬁguration of the electronics

The pluggable electronics is mounted in the electronics compartment of

the instrument and can be exchanged by the user when servicing is re-

quired.The electronics is completely encapsulated to protect against

vibration and moisture.

The terminals for voltage supply as well as the contact pins with I²Cinter-

face for parameter adjustment are located on the upper side of the elec-

tronics.In the double-chamber housing,the terminals are located in the

separate terminal compartment.

Voltage supply

Power supply and current signal are carried on the same two-wire cable.

The operating voltage can diﬀer depending on the instrument version.

You can ﬁnd the data of the voltage supply in chapter "Technical data"in

the operating instructions manual of the respective instrument.

Provide a reliable separation between the supply circuit and the mains

circuits according to DIN EN 61140 VDE 0140-1.

Data of the voltage supply:

lOperating voltage

-9.6…35 V DC

lPermissible residual ripple -Non-Ex,Ex-ia instrument

-for U

12 V DC:≤0.7V

eﬀ

(16 …400 Hz)

-for U

24 V DC:≤1.0V

eﬀ

(16 …400 Hz)

lPermissible residual ripple -Ex-d-ia instrument

-for U

24 V DC:≤1.0V

eﬀ

(16 …400 Hz)

Keep in mind the following additional factors that inﬂuence the operating

voltage:

lLower output voltage of the power supply unit under nominal load (e.g.

with a sensor current of 20.5mAor 22 mAin case of fault)

lInﬂuence of additional instruments in the circuit (see load values in

chapter "Technical data"of the operating instructions of the respective

instrument)

Connection cable

The instrument is connected with standard two-wire cable without screen.

If electromagnetic interference is expected which is above the test values

of EN 61326-1for industrial areas,screened cable should be used.

In the product conﬁgurator of VEGABAR,diﬀerent cable glands are avail-

able.This selection covers all cable diameters in the range of 4…12 mm

(0.16 …0.47 in).

We generally recommend the use of screened cable for HART multidrop

mode.

Cable screening and grounding

If screened cable is required,we recommend connecting 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 ground potential

(low impedance).

Connection

Single chamber housing

( ) (-)

6 7 8

4...20mA

Fig.25:Electronics and terminal compartment,single chamber housing

1Voltage supply/Signal output

2For display and adjustment module or interface adapter

3For external display and adjustment unit

4Ground terminal for connection of the cable screen

Double chamber housing

4...20mA

( ) (-)

Fig.26:Terminal compartment,double chamber housing

1Voltage supply/Signal output

2For display and adjustment module or interface adapter

3Ground terminal for connection of the cable screen

Electronics -4…20 mA/HART -two-wire

10 Process pressure –Pressure transmitter

45078-EN-140625

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