Vega VEGABAR 81 User manual

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.
1
3 4
2
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
1
2
3
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
Al
2
O
3
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
1
2
3
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
1
2
3
4
5
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
1
2
3
5
4
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
81
VEGABAR
82
VEGABAR
83
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.
h
Fig.20:Density measurement on a vessel with VEGABAR and Slave sensor
Interface measurement
VEGABAR measures the interface of two liquids in a vessel.
h
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
N
12 V DC:≤0.7V
eff
(16 …400 Hz)
-for U
N
24 V DC:≤1.0V
eff
(16 …400 Hz)
lPermissible residual ripple -Ex-d-ia instrument
-for U
N
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
5
12
+
( ) (-)
6 7 8
4...20mA
2
3
4
1
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
N
12 V DC:≤0.7V
eff
(16 …400 Hz)
-for U
N
24 V DC:≤1.0V
eff
(16 …400 Hz)
lPermissible residual ripple -Ex-d-ia instrument
-for U
N
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
5
12
+
( ) (-)
6 7 8
4...20mA
2
3
4
1
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
2
3
12
+
( ) (-)
1
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