VEGA WELL51 User Manual

Ope

p

rating Instructions

VEGAWELL 51
4 … 20 mA

Articl

e no. 32465

Process pressure/

Hydrostatic

Content

tent

Con

1 About this document

1.1 Function .

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

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

2 For your safety

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

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

2.3 Warning about misuse . . . . . . . . . . . . . . . . . . .

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

2.5 Safety approval markings and safety tips . . . . .

2.6 CE conformity . . . . . . . . . . . . . . . . . . . . . . . . .

2.7 Fulfilling of NAMUR recommendations . . . . . . .

2.8 Safety instructions for Ex areas . . . . . . . . . . . .

2.9 Environmental instructions . . . . . . . . . . . . . . . .

3 Product description

3.1 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . .

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

3.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Packaging, transport and storage . . . . . . . . . . .

4 Mounting

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

4.2 Mounting steps with straining clamp . . . . . . . . .

4.3 Mounting steps with screwed connection . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

4
4
4

5
5
5
5
6
6
6
6
6

8
10
10
10

12
14
15

5 Connecting to power supply

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

5.2 Connection procedure . . . . . . . . . . . . . . . . . . .

5.3 Wiring plan . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Switch on phase . . . . . . . . . . . . . . . . . . . . . . .

6 Maintenance and fault rectification

6.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Remove interferences . . . . . . . . . . . . . . . . . . .

6.3 Shorten suspension cable . . . . . . . . . . . . . . . .

6.4 Instrument repair . . . . . . . . . . . . . . . . . . . . . . .

7 Dismounting

7.1 Dismounting steps . . . . . . . . . . . . . . . . . . . . . .

7.2 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 VEG

16
18
19
19

20
20
21
21

32465-EN-080604

23
23

AWELL 51 • 4 … 20 mA

Content

8 Supplemen

t

8.1 Technical data. . . . . . . . . . . . . . . . . . . . . . . . .

8.2 Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3 Industrial property rights. . . . . . . . . . . . . . . . . .

8.4 Trademark . . . . . . . . . . . . . . . . . . . . . . . . . . .

24
31
32
32

Supplementary documentation

Information:

Supplemen

tary documents appropriate to the ordered version

come with the delivery. You can find them listed in chapter

"Product description".

Instructions manuals for accessories and replacement
parts

Tip:

ensure reliable setup and operation of your VEGAWELL 51,

To

we offer accessories and replacement parts. The associated
documents are:

l 32798 - VEGABOX 02

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 3

t this document

Abou

1 Abo

ut 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 rectification.
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 should be made
available to these personnel and put into practice by them.

1.3 Symbolism used

Information, tip, no

This symbol indicates helpful additional information.

Caution: If
tions 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.

this warning is ignored, faults or malfunc-

te

applications

Ex

This symbol indicates special instructions for Ex applications.

l List

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

à Action

This arrow

1 Sequence

Numbers set in front indicate successive steps in a procedure.

4 VEG

indicates a single action.

32465-EN-080604

AWELL 51 • 4 … 20 mA

your safety

For

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
protection equipment must always be worn.

2.2 Appropriate use

VEGAWELL 51 is a suspension pressure transmitter for level
and gauge measurement.

You can find detailed information on the application range in
chapter "Product description".

Operational reliability is ensured only if the instrument is
properly used according to the specifications in the operating
instructions manual as well as possible supplementary
instructions.

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. Arbitrary conversions or modifications are
explicitly forbidden.

2.3 Warning about misuse

Inappropriate or incorrect use of the instrument can give rise to
application-specific hazards, e.g. vessel overfill or damage to
system components through incorrect mounting or adjustment.

2.4 General safety instructions

This is a high-tech instrument requiring the strict observance of
standard regulations and guidelines. The user must take note
of the safety instructions in this operating instructions manual,
the country-specific installation standards as well as all
prevailing safety regulations and accident prevention rules.

The instrument must only be operated in a technically flawless
and reliable condition. The operator is responsible for trouble­free operation of the instrument.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 5

your safety

For

the entire duration of use, the user is obliged to

During
determine the compliance of the required occupational safety
measures with the current valid rules and regulations and also
take note of new regulations.

2.5 Safety approval markings and safety tips

The safety approval markings and safety tips on the device
must be observed.

2.6 CE conformity

The protection goals of the EMC Directive 2004/108/EC (EMC)
and the Low Voltage Directive 2006/95/EC (LVD) are fulfilled.

Conformity has been judged according to the following
standards:

EMC: EN 61326: 2004

(electrical instruments for control technology and laboratory
use - EMC requirements)

l Emission: Class A
l Susceptibil

ity: Industrial

LVD: EN 61010-1: 2001

(safety regulations for electrical measurement, control and
laboratory instruments - part 1: Gerneral requirements)

areas

2.7 Fulfilling of NAMUR recommendations

In respect to interference resistance and emitted interference,
the NAMUR recommendation NE 21 is met.

2.8 Safety instructions for Ex areas

Please note the Ex-specific safety information for installation
and operation in Ex areas. These safety instructions are part of
the operating instructions manual and come with the Ex­approved instruments.

2.9 Environmental instructions

Protection of the environment is one of our most important
duties. That is why we have introduced an environment
management system with the goal of continuously improving
company environmental protection. The environment man­agement system is certified according to DIN EN ISO 14001.

6 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

your safety

For

Please help us fulfil

this obligation by observing the environ-

mental instructions in this manual:

l Chapter "Packaging, transport and
l Chapter "Disposal"

storage"

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 7

Produ

ct description

Scope of delivery

Components

3 Prod

3.1 Configurat

uct description

ion

The scope of delivery encompasses:

l VEGAWELL 51 pressure
l Straining clamp or threaded fitting (optionally available)
l Documentation

transmitter with suspension cable

- this operating instructions manual

- test certificate

- Ex-specific "Safety instructions" (with Ex-versions)

- if necessary, further certificates

VEGAWELL 51 consists of the following components:

l Transmitter
l Suspensi

The

components are available in different versions.

on cable

8 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

3

2

1

Produc

t description

of a VEGAWELL 51 with screwed connection

Type label

Fig. 1: Example

1 Transmitter
2 Suspension cable
3 Threaded fitting

The type label contains the most important data for identi-

fication and use of the instrument:

l Article
l Serial number
l Technical data
l Article numbers, document

number

ation

With the serial number, you can access the delivery data of the
instrument via "

www.vega.com", "VEGA

Tools" and "serial

number search". In addition to the type label outside, you can

also find the serial number on the inside of the instrument.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 9

Produ

ct description

Application range

Functional principle

Voltage supply

Packaging

3.2 Princi

ple of operation

VEGAWELL 51 is used for level measurement in vessels and
for gauge measurement in deep wells, e.g. in water/sewage
water applications.

actual sensor element is the CERTEC

The

1)

®

measuring cell
with rugged ceramic diaphragm. The hydrostatic pressure
causes a capacitance change in the measuring cell via the
ceramic diaphragm. This change is converted into an
appropriate output signal.

Two-wire electronics 4 … 20 mA for power supply and
measured value transmission on the same cable.

The supply voltage range can differ depending on the
instrument version.

Data for power supply are specified in chapter "Technical
data".

3.3 Operation

VEGAWELL 51 with 4 … 20 mA electronics has no adjustment
option.

3.4 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 according to DIN EN 24180.

The packaging of standard instruments consists of environ-

ment-friendly, recyclable cardboard. For special versions, PE
foam or PE foil is also used. Dispose of the packaging material
via specialised recycling companies.

Transport

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

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.

1)

For use in closed vessels under vacuum, VEGAWELL 51 is available with
absolute pressure measuring ranges.

10 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Storage

Storage and transport

temperature

t description

Produc

to the time of installation, the packages must be left closed

Up
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:

l Not
l Dry and dust free
l Not exposed to corrosive media
l P
l Avoiding mechanical shock and vibration

l Storage and transport temperature see "Supplement -

l Relative humidity 20 … 85 %

in the open

rotected against solar radiation

Technical

data - Ambient conditions"

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 11

Moun

ting

Materials, wetted parts

Mounting position

Pressure compensation

4 Mou

nting

4.1 General instructions

Make

sure that the wetted parts of the instrument, especially
the seal and process fitting, are suitable for the existing
process conditions such as pressure, temperature etc. as well
as the chemical properties of the medium.

You can find the specifications in chapter "Technical data".

Note the following points when selecting the installation

location.

l Side

à Therefore, mount VEGAWELL 51 in a calm area or in a

Information:

We
VEGA line of accessory (article no. BARMONT.D) to fasten
VEGAWELL 51.

l The connection cable has a capillary for atmospheric

à Therefore lead the cable end into a dry space or directly

movements of the transmitter can cause measure-

ment

errors

suitable protective tube

recommend the measuring instrument holder from the

pressure

compensation

into a suitable terminal housing.

Information:

this purpose, VEGA recommends VEGABOX 02. It

For

contains terminals and a filter element for pressure compen­sation. A suitable protective cover is available for mounting
outdoors.

Mounting example

12 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Mounting

Fig. 2: Mounting
VEGABOX 02

example: VEGAWELL 51 in a pump shaft with breather housing

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 13

2

3

1

Moun

ting

4.2 Mount

Fig. 3: Straining

1 Suspension cable
2 Suspension opening
3 Clamping jaws

ing steps with straining clamp

clamp

Mount VEGAWELL 51 with straining clamp as follows:

1 Hang the straining clamp on a suitable wall hook
2 Lower VEGAWELL 51 to the requested height
3 Slide the clamping jaws upward and push the suspension

cable between them

4 Hold the suspension cable, push the clamping jaws

downward and fix them with a light blow

Removal is carried out in reverse order.

14 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

1

2

3

4

5

6

Mounting

4.3 Mount

Fig. 4: Threaded fitting

1 Suspension
2 Seal screw
3 Cone bushing
4 Seal cone
5 Threaded fitting
6 Seal

ing steps with screwed connection

cable

Mount VEGAWELL 51 with screwed connection as follows:

1 Weld the welded socket into the vessel top
2 Lower VEGAWELL 51 to the requested height by means

on the welded socket G1½ A or 1½ NPT on the vessel side

3 Insert the suspension cable from below into the open

screwed connection

4 Shift the seal cone and the cone sleeve to the suspension

cable, fasten manually with the seal screw

5 Screw the screwed connection into the socket, fasten with

SW 30 and then fasten seal screw with SW 19

How to correct the height:

1 Loosen seal screw with SW 19
2 Shift seal cone and cone sleeve to the requested position

on the cable

3 Fasten the seal screw
Removal is carried out in reverse order.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 15

ting to power supply

Connec

Note safety instructions

Take note of

safety instruc­tions for Ex ap­plications

Select power supply

Selecting connection

cable

5 Con

5.1 Preparin

necting to power supply

g the connection

Always keep in mind the following safety instructions:

l Connect only in the complete absence of line voltage
l VEGAWELL 51 contains an

integrated overvoltage pro­tection. If overvoltage is expected, overvoltage protection
instruments should be installed to protect connected
instruments

Tip:

We

recommend the following VEGA overvoltage arresters:

l ÜSB 62-36G.X (use in a separate housing)

In

hazardous areas you should take note of the appropriate
regulations, conformity and type approval certificates of the
sensors and power supply units.

Power supply and current signal are carried on the same two­wire cable. The voltage supply range can differ depending on
the instrument version.

Data for power supply are specified in chapter "Technical
data".

Provide a reliable separation between the supply circuit and
the mains circuits according to DIN VDE 0106 part 101.

VEGA power supply units VEGATRENN 149AEx, VEGASTAB
690, VEGADIS 371 as well as all VEGAMETs meet this

requirement. When using one of these instruments, protection
class III is ensured for VEGAWELL 51.

Bear in mind the following factors regarding supply voltage:

l Outpu

t voltage of the power supply unit can be lower under

nominal

load (with a sensor current of 20.5 mA or 22 mA in

case of fault message)

l Influence

of additional instruments in the circuit (see

load

values in chapter "Technical data")

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 for industrial areas,
screened cable should be used.

32465-EN-080604

16 VEG

AWELL 51 • 4 … 20 mA

1

2

ecting to power supply

Conn

cable with round cross-section. A cable outer diameter of

Use
5 … 9 mm (0.2 … 0.35 in) ensures the seal effect of the cable
gland. If you are using cable with other diameter or cross­section, you have to exchange the seal or use a suitable cable
gland.

power supply

Cable screening and
grounding

Fig. 5: Connect VEGAWELL 51 to

1 Direct connection
2 Connection via VEGABOX 02

If screened cable is necessary, connect the cable screen on
both ends to ground potential. In the plastic housing, in
VEGABOX 02 or in VEGADIS 12, the screen must be
connected directly to the internal ground terminal. The ground
terminal outside on the housing must be connected to the
potential equalisation.

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 suppressed, but the protective effect against
high frequency interference signals remains.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 17

ting to power supply

Connec

Select connec­tion cable for Ex
applications

Direct connection

Connection via
VEGABOX 02

note of the corresponding installation regulations for Ex

Take

applications.

5.2 Connection procedure

Proceed as follows:

1 Wire the connection cable up to the connection compart-

ment. The bending radius must be at least 25 mm.

the

2 Connect

wire ends to the screw terminals according to

the wiring plan

Proceed as follows:

1 Snap VEGABOX 02 onto the carrier rail or screw it to the

mounting plate

2 Loosen the cover screws and remove the cover
3 Shift cable through the cable gland into VEGABOX 01 B
4 Loosen the screws with a screwdriver
5 Insert the wire ends into the open terminals according to

the wiring plan

6 Tighten the screws with a screwdriver
7 Check the hold of the wires in the terminals by lightly

pulling on them

8 Tighten the compression nut of the cable entry. The seal

ring must completely encircle the cable

9 Connect the supply cable according to steps 3 to 8
10 Screw the housing cover on

The electrical connection is finished.

2)

2)

The connection cable is already preconfectioned. After shortening the ca­ble, fasten the type plate with support again to the cable.

18 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

4

1

223

1

2

–
+

1 2 3 4 5 6

1 2 3 4 5 6

ecting to power supply

Conn

Direct connection

Connection via
VEGABOX 02

5.3 Wir

Fig. 6: Wire

1 blue (-): to power supply or to the processing system
2 brown (+): to power supply or to the processing system
3 Shielding
4 Breather capillaries with filter element

Fig. 7: Terminal

1 To power supply or the processing system
2 Shielding

ing plan

assignment, suspension cable

assignment VEGABOX 02

3)

5.4 Switch on phase

After connecting VEGAWELL 51 to power supply or after a
voltage recurrence, the instrument carries out a self-check:

l Internal
l 4 … 20 mA output jumps

Then VEGAWELL 51 delivers a current of 4 … 20 mA to the
cable. The value corresponds to the actual level as well as to
settings already carried out, e.g. the factory setting.

3)

Connect screen to ground terminal. Connect ground terminal on the outside
of the housing as prescribed. The two terminals are galvanically connected.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 19

check of the electronics

to the failure signal

nance and fault rectification

Mainte

Reaction when malfunc­tions occur

Causes of malfunction

Fault rectification

24 hour service hotline

6 Main

tenance and fault rectification

6.1 Maintenance

When

used in the correct way, no special maintenance is

required in normal operation.

6.2 Remove interferences

The operator of the system is responsible for taken suitable
measures to remove interferences.

A maximum of reliability is ensured. Nevertheless, faults can
occur during operation. These may be caused by the following,
e.g.:

l Sensor
l Process
l Voltage supply
l Signal processing

The first
many cases, the causes can be determined this way and the
faults rectified.

However, should these measures not be successful, call the
VEGA service hotline in urgent cases under the phone no. +49

1805 858550.

The hotline is available to you 7 days a week round-the-clock.
Since we offer this service world-wide, the support is only

available in the English language. The service is free of
charge, only the standard telephone costs will be charged.

measure to be taken is to check the output signal. In

Checking the 4 … 20 mA
signal

Connect a handheld multimeter in the suitable measuring
range according to the wiring plan.

? 4 … 20 mA signal not stable

l no atmospheric pressure compensation

the

à Check

capillaries and cut them clean

à Check pressure compensation in VEGABOX 02, if

necessary clean filter element

20 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Maintenance and fault rectificati

on

Reaction after fault rec­tification

? 4 … 20 mA signal

l Wrong connection to power supply

à Check

connection according to chapter "Connection

missing

steps" and if necessary, correct according to chapter
"Wiring plan"

voltage supply

l No

à Check

l supply voltage too low or load resistance too high

cables for breaks; repair if necessary

à Check, adapt if necessary

In Ex

applications, the regulations for the wiring of intrinsically

safe circuits must be observed.

Depending on the failure reason and measures taken, the
steps described in chapter "Set up" must be carried out again,
if necessary.

6.3 Shorten suspension cable

Shorten the suspension cable individually. Proceed as follows:

1 Remove the filter adapter from the transparent capillary line
2 Cut the suspension cable with an edge cutter to the

requested length

Caution:

not squeeze the capillary cable, this will influence the

Do
pressure compensation. If necessary, rework with a sharp
knife.

3 Remove approx. 10 cm of the cable mantle, strip off

approx. 1 cm of the wire ends

Insert the filter adapter

The work steps are finished.

6.4 Instrument repair

If a repair is necessary, please proceed as follows:

You can download a return form (23 KB) from our Internet

homepage

certificates - Repair form".

By doing this you help us carry out the repair quickly and
without having to call back for needed information.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 21

www.vega.com

under: "Downloads - Forms and

nance and fault rectification

Mainte

rint and fill out one form per instrument

l P
l Clean the instrument and pack it damage-proof
l Attach the completed form and probably the safety data

sheet

outside on the packaging

l Please ask the agency serving you for the address of your

return shipment. You can find the respective agency on our
website www.vega.com

under: "Company - VEGA world-

wide"

22 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Dismoun

ting

7 Dism

ounting

7.1 Dismounting steps

Warning:

Before dismounting, be aware of dangerous process con­ditions such as e.g. pressure in the vessel, high temperatures,
corrosive or toxic products etc.

Take note of chapters "Mounting" and "Connecting to power
supply" and carry out the listed steps in reverse order.

7.2 Disposal

The instrument consists of materials which can be recycled by
specialised recycling companies. We use recyclable materials
and have designed the electronics to be easily separable.

WEEE directive 2002/96/EG

This instrument is not subject to the WEEE directive 2002/96/
EG and the respective national laws. Pass the instrument

directly on to a specialised recycling company and do not use
the municipal collecting points. These may be used only for
privately used products according to the WEEE directive.

Correct disposal avoids negative effects to persons and
environment and ensures recycling of useful raw materials.

Materials: see chapter "Technical data"

If you cannot dispose of the instrument properly, please

contact us about disposal methods or return.

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 23

Suppl

ement

8 Sup

8.1 Technical

plement

data

General data

Measured value Level
Measuring principle Ceramic-capacitive, dry measuring cell
Communication interface None

Materials and weights

Materials, wetted parts

- Transmitter 316L, Titanium

- Protective cap PA, PE

- Diaphragm sapphire ceramic

®

(99.9 % oxide ceramic)

- Measuring cell seal FKM (FDA and KTW approved, Viton), FFKM
(Kalrez 6375), EPDM

- Suspension cable PE (FDA and KTW-approved), FEP, PUR

- Straining clamp 1.4301

- Threaded fitting 316L

- Process fitting/cable outlet 316L

Materials, non-wetted parts

- type label support on cable PE hard

- transport protection net PE

Weight approx.

- Basic weight 0.8 kg (1.764 lbs)

- Suspension cable 0.1 kg/m (0.07 lbs/ft)

- Straining clamp 0.2 kg (0.441 lbs)

- Threaded fitting 0.4 kg (0.882 lbs)

Input variable

Factory setting or adjustment via HART

percentage value -10 … +110 % of the nominal measuring

range

pressure value -20 … +120 % of the nominal measuring

range

Recommended max. turn down 10 : 1 (no limitation)

Nominal measuring ranges and overload capability in bar/kPa

24 VEG

AWELL 51 • 4 … 20 mA

32465-EN-080604

plement

Sup

range Overload, max. pressure Overload, min. pressure

Nominal

Gauge pressure

0 … 0.1 bar/0 … 10 kPa 15 bar/1500 kPa -0.2 bar/-20 kPa
0 … 0.2 bar/0 … 20 kPa 20 bar/2000 kPa -0.4 bar/-40 kPa
0 … 0.4 bar/0 … 40 kPa 30 bar/3000 kPa -0.8 bar/-80 kPa
0 … 1 bar/0 … 100 kPa 35 bar/3500 kPa -1 bar/-100 kPa
0 … 2.5 bar/0 … 250 kPa 50 bar/5000 kPa -1 bar/-100 kPa
0 … 5 bar/0 … 500 kPa 65 bar/6500 kPa -1 bar/-100 kPa
0 … 10 bar/0 … 1000 kPa 90 bar/9000 kPa -1 bar/-100 kPa
0 … 25 bar/0 … 2500 kPa 130 bar/13000 kPa -1 bar/-100 kPa

Absolute pressure

0 … 1 bar/0 … 100 kPa 35 bar/3500 kPa

0 … 2.5 bar/0 … 250 kPa 50 bar/5000 kPa

0 … 5 bar/0 … 500 kPa 65 bar/6500 kPa

0 … 10 bar/0 … 1000 kPa 90 bar/9000 kPa

0 … 25 bar/0 … 2500 kPa 130 bar/13000 kPa

0 bar abs.

0 bar abs.

0 bar abs.

0 bar abs.

0 bar abs.

Nominal measuring ranges and overload capability in psig

Nominal range Overload, max. pressure Overload, min. pressure

Gauge pressure

0 … 1.5 psig 200 psig -3 psig
0 … 3 psig 290 psig -6 psig
0 … 6 psig 430 psig -12 psig
0 … 15 psig 500 psig -15 psig
0 … 35 psig 700 psig -15 psig
0 … 70 psig 950 psig -15 psig
0 … 150 psig 1300 psig -15 psig
0 … 350 psig 1900 psig -15 psig
0 … 900 psig 2900 psig -15 psig

Absolute pressure

0 … 15 psi 500 psi

0 … 35 psi 700 psi

0 … 70 psi 900 psi

0 … 150 psi 1300 psi

0 … 350 psi 1900 psi

0 psi

0 psi

0 psi

0 psi

0 psi

Output variable

Output signal 4 … 20 mA

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 25

ement

Suppl

l resolution 2 µA

Signa
Failure signal 22 mA
Max. output current 22 mA
Run-up time 2 s
Step response time 100 ms (ti: 0 s, 0 … 63 %)
Fulfilled NAMUR recommenda-

NE 43

tions

Reference conditions and actuating variables (similar to DIN EN 60770-1)

Reference conditions according to DIN EN 61298-1

- Temperature +15 … +25 °C (+59 … +77 °F)

- Relative humidity 45 … 75 %

- Air pressure 860 … 1060 mbar/86 … 106 kPa

(12.5 … 15.4 psig)

Determination of characteristics Limit point adjustment according to

IEC 61298-2

Characteristics curve linear
Reference installation position upright, diaphragm points downward
Influence of the installation position < 0.2 mbar/20 Pa (0.003 psi)

Deviation determined according to the limit point method according to IEC 60770

Specifications

to the set span. Turn down (TD) = nominal measuring range/set

refer

span.
Deviation

- Turn down 1 : 1 up to 5 : 1 < 0.2 %

- Turn down up to 10 : 1 < 0.04 % x TD

Influence of the product or ambient temperature

Specifications refer to the set span. Turn down (TD) = nominal measuring range/set
span.

Average temperature coefficient of the zero signal

In the compensated temperature range of 0 … +80 °C (+32 … +176 °F), reference
temperature 20 °C (68 °F).

4)

Incl. non-linearity, hysteresis and non-repeatability.

26 VEG

AWELL 51 • 4 … 20 mA

4)

32465-EN-080604

Sup

plement

Average

temperature coefficient of the zero signal

- Turn down 1 : 1 < 0.15 %/10 K

- Turn down up to 5 : 1 < 0.2 %/10 K

- Turn down up to 10 : 1 < 0.25 %/10 K

Outside the compensated temperature range:
Average temperature coefficient of the zero signal

- Turn down 1 : 1 typ. < 0.15 %/10 K

Thermal change, current output

Thermal change, current output < 0.15 % at -40 … +80 °C (-40 … +176 °F)

Long-term stability (similar to DIN 16086, DINV 19259-1 and IEC 60770-1)

Specifications refer to the set span. Turn down (TD) = nominal measuring range/set
span.

Long-term drift of the zero signal < (0.1 % x TD)/year

Total deviation (similar to DIN 16086)

The total deviation F

, also called practical deviation, is the sum of the basic accuracy F

t

p

and long-term stability:

Ft= Fp+ F

F

perf

s

= √((FT)2+ (FKl)2)

With

- Ft: F

- Fp: F

- F

, total deviation

total

, basic accuracy

perf

: F

, long-term drift

s

stab

- FT: Temperature coefficient

(influence of medium or ambi­ent temperature)

- F

: Deviation

Kl

Ambient conditions

Ambient temperature

- Connection cable PE -40 … +60 °C (-40 … +140 °F)

- Connection cable PUR, FEP -40 … +80 °C (-40 … +176 °F)

Storage and transport temperature -40 … +80 °C (-40 … +176 °F)

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 27

Suppl

ement

Process

conditions

Max. process pressure, transmitter

- Measuring range 0.1 bar

15 bar (218 psig)

5)

(1.45 psig)

- Measuring range 0.2 bar

20 bar (290 psig)

6)

(2.9 psig)

- Measuring range ≤ 0.4 bar

25 bar (363 psig)

7)

(5.8 psig)

P

ressure stage, process fitting

- Threaded fitting 316L PN 3

Product temperature depending on suspension cable and measuring cell seal

Suspension cable Measuring cell seal Product temperature

PE FKM -20 … +60 °C (-4 … +140 °F)

PE EPDM -40 … +60 °C (-40 … +140 °F)

PUR FKM -20 … +80 °C (-4 … +176 °F)

PUR EPDM -40 … +80 °C (-40 … +176 °F)

FEP FFKM -10 … +80 °C (+14 … +176 °F)

Vibration resistance mechanical vibrations with 4 g and

5 … 100 Hz

8)

Electromechanical data

Suspensi

on cable

- Configuration six wires, one suspension cable, one breather
capillary, screen braiding, foil, mantle

- Wire cross-section 0.5 mm²

- Wire resistance ≤ 0.036 Ω/m

- Tensile strength ≥ 1200 N (270 pound force)

- Max. length 1000 m (3280 ft)

- Min. bending radius 25 mm (with 25 °C/77 °F)

- Diameter approx. 8 mm (0.315 in)

- colour (non-Ex/Ex) - PE black/blue

- colour (non-Ex/Ex) - PUR, FEP blue/blue

5)

Limited by the gauge pressure resistance of the measuring cell.

6)

Limited by the gauge pressure resistance of the measuring cell.

7)

Limitation by the pressure-tightness of the cable connection.

8)

Tested according to the regulations of German Lloyd, GL directive 2.

28 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

1200

880

600

380

12 18

16

9,6

14 20 22 24 26 28 29 30 32 34 36

Ω

V

1

4

2

3

Sup

plement

Voltage

supply

Supply voltage

- Non-Ex instrument 9.6 … 36 V DC

- EEx-ia instrument 9.6 … 29 V DC

Permissible residual ripple

- < 100 Hz U

ss

< 1 V

- 100 Hz … 10 kHz Uss< 10 mV

Load see diagram

Fig. 8: Voltage
1 meaningless

2 Voltage limit Ex instrument
3 Voltage limit non-Ex instrument
3 Supply voltage

diagram

Integrated overvoltage protection

Nominal leakage current (8/20 µs) 5 kA
Min. response time < 25 ns

Electrical protective measures

Protection

- Transmitter IP 68 (25 bar)
Overvoltage category III
Protection class III

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 29

Suppl

ement

Existing

approvals or approvals applied for

9)

Approvals

- ATEX ATEX

II 2G EEx ia IIC T6

- IEC IEC Ex ia IIC T6

- PTB Ex-Zone 2

- Ship approvals GL, LRS, ABS, CCS, RINA, DNV

9)

Deviating data in Ex applications: see separate safety instructions.

30 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

imensions

1 2

L

175 mm (6

57

/

64

")

228 mm (8

31

/

32

")

ø 22 mm

(

55

/

64

")

52 mm

(2

3

/

64

")

38,5 mm

(1

33

/

64

")

14 mm

(

35

/

64

")

48 mm

(1

57

/

64

")

22 mm

(

55

/

64

")

ø 8 mm

(

5

/

16

")

G1 ½A/
NPT1 ½

SW30

8.2 D

VEGAWELL 51

plement

Sup

Fig. 9: VEGAWELL 51

straining clamp

1 with
2 With threaded fitting, unassembled G1½ A (1½ NPT)

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 31

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ement

8.3 Indus

trial property rights

8.4 Trademark

VEGA product lines are global protected by industrial property
rights. Further information see http://www.vega.com.

Only in U.S.A.: Further information see patent label at the
sensor housing.

VEGA Produktfamilien sind weltweit geschützt durch
gewerbliche Schutzrechte.

Nähere Informationen unter http://www.vega.com.

Les lignes de produits VEGA sont globalement protégées par
des droits de propriété intellectuelle. Pour plus d'informations,
on pourra se référer au site http://www.vega.com.

VEGA lineas de productos están protegidas por los derechos
en el campo de la propiedad industrial. Para mayor
información revise la pagina web http://www.vega.com.

Линии продукции фирмы ВЕГА защищаются по всему
миру правами на интеллектуальную собственность.
Дальнейшую информацию смотрите на сайте http://www.

vega.com.

VEGA系列产品在全球享有知识产权保护。
进一步信息请参见网站<http://www.vega.com>。

All brands used as well as trade and company names are
property of their lawful proprietor/originator.

32 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Sup

plement

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 33

Suppl

ement

34 VEG

32465-EN-080604

AWELL 51 • 4 … 20 mA

Sup

plement

32465-EN-080604

VEGAWELL 51 • 4 … 20 mA 35

VEGA G rieshaber KG

ISO 9001

Am Hohenstein 113
77761 Schiltach

Germany
Phone [phone]
Fax [phone]
E-mail: [e-mail]

www.vega.com

Printing date:

statements concerning scope of delivery, application,

All

practical use and operating conditions of the sensors and

processing systems correspond to the information avail-

able at the time of printing.

© VEGA Grieshaber KG, Schiltach/Germany 2008

Subject to change without prior notice 32465-EN-080604