VEGA FLEX81 User Manual

Operating Instructions

TDR sensor for continuous level and interface measurement of liquids

VEGAFLEX 81

Profibus PA

Document ID: 44217

Quick start

Quick start

The quick start procedure enables a quick setup of the instrument with many applications.You can find further information in the respective chapters of the operating instructions manual.

Mounting	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.	In non-metallic vessels, place a metal sheet beneath the process
		fitting.

Electrical connection

Set parameters

2

1

2

Fig. 1: Installation in non-metallic vessel

1Flange

2Metal sheet

3. If necessary, fasten probe end.

For further information see chapter "Mounting".

1.Make sure that the power supply corresponds to the specifications on the type label.

2.Connect the instrument according to the following illustration

2

3

	0	1	9	012	9	012
	1		8	3	8		3	4
Bus	0		7		7	5
			5	4	6		4
			6

(+)1

2(-)

5 6 7 8

5

1

Fig. 2: Electronics and connection compartment, single chamber housing

1Voltage supply, signal output

2For display and adjustment module or interface adapter

3Selection switch for bus address

4For external display and adjustment unit

5Ground terminal for connection of the cable screen

For further information see chapter "Connecting to power supply".	44217
For standard applications we recommend selecting the "Quick setup"
in the display and adjustment module.	EN-
	130910-

VEGAFLEX 81 • Profibus PA

Quick start

1.In this menu item you can select the application.You can choose between level and interface measurement.

2.In the menu item "Medium - Dielectric constant" you can define the type of medium (medium).

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

4.A "Linearization" is recommended for all vessels in which the vessel volume 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.See also chapter "Parameter adjustment".

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1		1
4		4
2	2	3
3
		5
5

Fig. 3: Measuring ranges - VEGAFLEX 81

1Reference plane

2Probe length L

3Measuring range (default setting refers to the measuring range in water)

4Upper dead band (in this area no measurement is possible)

5Lower 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

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3

Quick start

point for these distance specifications is always the seal surface of the thread or flange.

Further steps	1.	In the menu "Additional settings", menu item "Damping" you can
		adjust the requested damping of the output signal.
	2.	Select the parameter of the current output and the output charac-
		teristics in the menu item "Current output".

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				Contents
Contents
1	About this document			7
	1.1	Function............................................................................................................................
	1.2	Target group......................................................................................................................		7
	1.3	Symbolism used...............................................................................................................		7
2	For your safety			8
	2.1	Authorised personnel........................................................................................................
	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			10
	3.1	Configuration..................................................................................................................
	3.2	Principle of operation......................................................................................................		11
	3.3	Packaging, transport and storage...................................................................................		14
	3.4	Accessories and replacement parts................................................................................		14
4	Mounting			17
	4.1	General instructions........................................................................................................
	4.2	Mounting instructions......................................................................................................		17
5 Connecting to power supply				24
	5.1	Preparing the connection................................................................................................
	5.2	Connecting.....................................................................................................................		24
	5.3	Wiring plan, single chamber housing..............................................................................		26
	5.4	Wiring plan, double chamber housing.............................................................................		26
	5.5	Wiring plan, Ex-d-ia double chamber housing................................................................		28
	5.6	Wiring plan - version IP 66/IP 68, 1 bar...........................................................................		29
	5.7	Supplementary electronics.............................................................................................		30
	5.8	Set instrument address...................................................................................................		30
	5.9	Switch-on phase.............................................................................................................		31
6 Set up with the display and adjustment module				32
	6.1	Insert display and adjustment module.............................................................................
	6.2	Adjustment system..........................................................................................................		33
	6.3	Parameter adjustment - Quick setup...............................................................................		34
	6.4	Parameter adjustment - Extended adjustment................................................................		37
	6.5	Saving the parameter adjustment data...........................................................................		55
7	Setup with PACTware			57
	7.1	Connect the PC...............................................................................................................
	7.2	Parameter adjustment with PACTware............................................................................		57
	7.3	Set up with the quick setup.............................................................................................		58
	7.4	Saving the parameter adjustment data...........................................................................		63
8 Set up with other systems				64
	8.1	DD adjustment programs................................................................................................
9	Diagnostics and service			65
	9.1	Maintenance...................................................................................................................
VEGAFLEX 81 • Profibus PA				5

Contents
9.2	Diagnosis memory..........................................................................................................	65
9.3	Status messages............................................................................................................	66
9.4	Rectify faults...................................................................................................................	70
9.5	Exchanging the electronics module................................................................................	75
9.6	Exchanging the cable/rod...............................................................................................	75
9.7	Software update..............................................................................................................	77
9.8	How to proceed in case of repair.....................................................................................	78
10 Dismounting
10.1	Dismounting steps..........................................................................................................	79
10.2	Disposal..........................................................................................................................	79
11 Supplement
11.1	Technical data.................................................................................................................	80
11.2	Communication Profibus PA...........................................................................................	90
11.3	Dimensions.....................................................................................................................	95

	Safety instructions for Ex areas
	Please note the Ex-specific safety information for installation and op-
	eration in Ex areas.These safety instructions are part of the operating
	instructions manual and come with the Ex-approved instruments.
	Editing status:2013-07-24
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1 About this document

1 About this document

1.1Function

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.

1.2Target 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.

1.3Symbolism 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.

1Sequence of actions

Numbers set in front indicate successive steps in a procedure.

Battery disposal

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

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2 For your safety

2 For your safety

2.1Authorised 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.

2.2Appropriate use

VEGAFLEX 81 is a sensor for continuous level 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.

2.3Warning about incorrect use

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.

2.4General 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 flawless 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 national 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.Arbitrary conversions or modifications are explicitly forbidden.

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

2.5CE conformity

The device fulfills the legal requirements of the applicable EC guidelines.By affixing the CE marking, we confirm successful testing of the product.

You can find the CE Certificate of Conformity in the download section of our homepage.

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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 different environment, the electromagnetic compatibility to other instruments must be ensured by suitable measures.

2.6NAMUR recommendations

NAMUR is the automation technology user association in the process industry in Germany.The published NAMUR recommendations are accepted as the standard in field instrumentation.

The device fulfills the requirements of the following NAMUR recommendations:

•

•

•

•

NE 21 – Electromagnetic compatibility of equipment

NE 43 – Signal level for malfunction information from measuring transducers

NE 53 – Compatibility of field devices and display/adjustment components

NE 107 – Self-monitoring and diagnosis of field devices

For further information see www.namur.de.

2.7Environmental 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.

Please help us fulfill this obligation by observing the environmental instructions in this manual:

•Chapter "Packaging, transport and storage"

•Chapter "Disposal"

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3 Product description

3 Product description

3.1Configuration

Type plate	The nameplate contains the most important data for identification and
	use of the instrument:

1	16
2	15

3

14

4

5	13
6

	7	12
	8
	9	11
	10

Fig. 4: Layout of the type label (example)

1Instrument type

2Product code

3Approvals

4Power supply and signal output, electronics

5Protection rating

6Probe length

7Process and ambient temperature, process pressure

8Material, wetted parts

9Hardware and software version

10Order number

11Serial number of the instrument

12Symbol of the device protection class

13ID numbers, instrument documentation

14Reminder to observe the instrument documentation

15Notified authority for CE marking

16Approval directives

Serial number	The type label contains the serial number of the instruments.Hence
	you can find the following data on our homepage:

•Product code of the instrument (HTML)

•Delivery date (HTML)

•Order-specific instrument features (HTML)

•Operating instructions at the time of shipment (PDF)

•Order-specific sensor data for an electronics exchange (XML)

•Test certificate pressure transmitters (PDF)

Go to www.vega.com, "VEGA Tools" and "Serial number search".

As an alternative, you can find the data via your Smartphone:

•Download the smartphone app "VEGA Tools" from the "Apple App Store" or the "Google Play Store"

•Scan the Data Matrix code on the type label of the instrument or

•Enter the serial number manually in the app

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				3 Product description
Scope of this operating		This operating instructions manual applies to the following instrument
instructions manual		versions:
		•	Hardware from 1.0.0
		•	Software from 1.0.0
		•	Only for instrument versions without SIL qualification
Versions		This electronics version can be determined via the product code on
		the type label as well as on the electronics.
		•	Standard electronics:Type FX80PA.-
Scope of delivery		The scope of delivery encompasses:
		•	Sensor
		•	Documentation
			––	this operating instructions manual
			––	Test certificate 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-specific "Safety instructions" (with Ex versions)
			––	if necessary, further certificates
		3.2		Principle of operation
Application area		TheVEGAFLEX 81 is a level sensor with cable or rod probe for
		continuous level or interface measurement, suitable for applications
		in liquids.
Functional principle -		High frequency microwave pulses are guided along a steel cable or
level measurement		a rod.Upon reaching the product surface, the microwave pulses are

reflected.The running time is evaluated by the instrument and outputted as level.

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3 Product description

1

d

h

Functional principle - interface measurement

12

Fig. 5: Level measurement

1 Sensor reference plane (seal surface of the process fitting) d Distance to the interface

h Height - 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 vessels with fluidized products.

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 continued 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.

High frequency microwave impulses are guided along a steel cable or rod.Upon reaching the product surface, a part of the microwave impulses is reflected.The other part passes through the upper product and is reflected by the interface.The running times to the two product layers are processed by the instrument.

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3 Product description

1

	L3	d2
		d1

L2 TS

h2	L1
	h1

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Prerequisites for interface measurement

Fig. 6: Interface measurement

1 Sensor reference plane (seal surface of the process fitting) d1 Distance to the interface

d2 Distance to the level

TS Thickness of the upper medium (d1 - d2) h1 Height - Interface

h2 Height - Level

L1 Lower medium

L2 Upper medium

L3 Gas phase

Upper medium (L2)

•The upper medium must not be conductive

•The dielectric constant of the upper medium or the actual distance to the interface must be known (input required).Min.dielectric constant:1.6.You can find a list of dielectric constants on our home page:www.vega.com.

•The composition of the upper medium must be stable, no varying products or mixtures

•The upper medium must be homogeneous, no stratifications within the medium

•Min.thickness of the upper medium 50 mm (1.97 in)

•Clear separation from the lower medium, emulsion phase or detritus layer max.50 mm (1.97 in)

•If possible, no foam on the surface

Lower medium (L1)

•The dielectric constant must be 10 higher than the dielectric constant of the upper medium, preferably electrically conductive. Example:upper medium dielectric constant 2, lower medium at least dielectric constant 12.

Gas phase (L3)

•Air or gas mixture

•Gas phase - dependent on the application, gas pahse does not always exist (d2 = 0)

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13

3 Product description

Output signal

Packaging

Transport

Transport inspection

Storage

Storage and transport temperature

PLICSCOM

VEGACONNECT

14

The instrument is always preset to the application "Level measurement".

For the interface measurement, you can select the requested output signal with the setup.

3.3Packaging, 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 in due consideration of the notes on the transport packaging.Nonobservance of these instructions can cause damage to the device.

The delivery must be checked for completeness and possible transit damage immediately at receipt.Ascertained transit damage or 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 %

3.4Accessories 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 find further information in the operating instructions "Display and adjustment module PLICSCOM" (Document-ID 27835).

The interface adapterVEGACONNECT enables the connection of communication-capable instruments to the USB interface of a PC.For parameter adjustment of these instruments, the adjustment software PACTware withVEGA-DTM is required.

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		3 Product description
		You can find further information in the operating instructions "Interface
		adapter VEGACONNECT" (Document-ID 32628).
VEGADIS 81		TheVEGADIS 81 is an external display and adjustment unit forVEGA
		plics® sensors.
		For sensors with double chamber housing the interface adapter
		"DISADAPT" is also required forVEGADIS 81.
		You can find further information in the operating instructions "VE-
		GADIS 81" (Document-ID 43814).
PLICSMOBILE T61		The PLICSMOBILET61 is an external GSM/GPRS radio unit for
		transmission of measured values and for remote parameter adjust-
		ment of plics® sensors.The adjustment is carried out via PACTware/
		DTM by using the integrated USB connection.
		You can find further information in the supplementary instructions
		"PLICSMOBILE T61" (Document-ID 37700).
Protective cap		The protective cover protects the sensor housing against soiling and
		intense heat from solar radiation.
		You will find additional information in the supplementary instructions
		manual "Protective cover" (Document-ID 34296).
Flanges		Screwed flanges are available in different versions according to the
		following standards:DIN 2501, EN 1092-1, BS 10, ANSI B 16.5,
		JIS B 2210-1984, GOST 12821-80.
		You can find additional information in the supplementary instructions
		manual "Flanges according to DIN-EN-ASME-JIS" (Document-ID
		31088).
Electronics module		The electronics moduleVEGAFLEX series 80 is a replacement part
		forTDR sensors ofVEGAFLEX series 80.There is a different version
		available for each type of signal output.
		You can find further information in the operating instructions manual
		"Electronics module VEGAFLEX series 80".
Display and adjustment		The display and adjustment module can be optionally replaced by a
module with heating		display and adjustment module with heating function.
		You can use this display and adjustment module in an ambient tem-
		perature range of -40 … +70 °C.
		You can find 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
		different lengths.
		All extensions used must not exceed a total length of 6 m (19.7 ft).
		The extensions are available in the following lengths:
		Rod: ø 12 mm (0.472 in)
		• Basic segments:20 … 5900 mm (0.79 … 232 in)
VEGAFLEX 81 • Profibus PA		15

3 Product description

	•	Rod segments:20 … 5900 mm (0.79 … 232 in)
	•	Curved segments:100 x 100 mm (3.94 … 3.94 in)
	You can find further information in the operating instructions manual
	"Rod extension VEGAFLEX series 80".
Bypass tube	The combination of a bypass tube and aVEGAFLEX 81 enables con-
	tinuous level measurement outside the vessel.The bypass consists
	of a standpipe which is mounted as a communicating container on
	the side of the vessel via two process fittings.This kind of mounting
	ensures that the level in the standpipe and the level in the vessel are
	the same.
	The length and the process fittings can be configured individually.No
	different connection versions available.
	You can find further information in the operating instructions manual
	"Bypass tube VEGAPASS 81".
Spacer	If you mount theVEGAFLEX 81 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 find additional information in the operating instructions manual "Centering".

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			4 Mounting
		4	Mounting
		4.1 General instructions
Screwing in		On instruments with process fitting thread, the hexagon must be tight-
		ened with a suitable screwdriver.Wrench size see chapter "Dimen-
		sions".
		Warning:
		The housing must not be used to screw the instrument in! Applying
		tightening force can damage internal parts of the housing.
Protection against mois-		Protect your instrument further through the following measures
ture		against moisture penetration:
		•	Use the recommended cable (see chapter "Connecting to power
			supply")
		•	Tighten the cable gland
		•	Loop the connection cable downward in front of the cable gland
		This applies particularly to:
		•	Outdoor mounting
		•	Installations in areas where high humidity is expected (e.g.through
			cleaning processes)
		•	Installations on cooled or heated vessels
Protective caps		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 protec-
		tive caps as transport protection.
		Prior to setup you have to replace these protective caps with ap-
		proved cable glands or close the openings with suitable blind plugs.
		The suitable cable glands and blind plugs come with the instrument.
Suitability for the process		Make sure that all parts of the instrument exposed to the process are
conditions		suitable for the existing process conditions.

These are mainly:

•Active measuring component

•Process fitting

•Process seal

Process conditions are particularly:

•Process pressure

•Process temperature

•Chemical properties of the medium

•Abrasion and mechanical influences

You can find the specifications of the process conditions in chapter "Technical data" as well as on the nameplate.

	4.2 Mounting instructions
Installation position	MountVEGAFLEX 81 in such a way that the distance to vessel instal-
	lations or to the vessel wall is at least 300 mm (12 in).In non-metallic
VEGAFLEX 81 • Profibus PA	17

4 Mounting

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 possible.The exact value of the min.distance (lower dead band) is stated in chapter "Technical data".

	Fig. 7: Vessel with conical bottom
Type of vessel	Plastic vessel/Glass vessel
	The guided microwave principle requires a metal surface on the pro-
	cess fitting.Therefore use in plastic vessels etc.an instrument version
	with flange (from DN 50) or place a metal sheet (ø > 200 mm/8 in)
	beneath the process fitting when screwing it in.
	Make sure that the plate has direct contact with the process fitting.
	When installing rod or cable probes in vessels without metal walls,
	e.g.in plastic vessels, the measured value can be influenced by
	strong electromagnetic fields (emitted interference according to
	EN 61326:class A).In this case, use a probe with coaxial version.

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4 Mounting

1

2

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Fig. 8: Installation in non-metallic vessel

1Flange

2Metal sheet

Socket	If possible, avoid sockets.Mount the sensor flush 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 can, however, increase the upper blocking distance (dead band).Check if this is relevant for your measurement.

In such cases, always carry out a false signal suppression after installation.You can find further information under "Setup procedure".

	d	h
	DN40 ... DN150	< 150
	> DN150 ... DN200	< 100
d	h

Fig. 9: Mounting socket

When welding the socket, make sure that the socket is flush with the vessel top.

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19

4 Mounting

Welding work

Inflowing medium

Measuring range

20

1

2

Fig.10:Socket must be installed flush

1 Unfavourable installation

2Socket flush - optimum installation

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 filling stream.Make sure that you detect the product surface, not the inflowing product.

	Fig.11:Mounting of the sensor with inflowing medium
	The reference plane for the measuring range of the sensors is the	44217
	sealing surface of the thread or flange.
	Keep in mind that a min.distance must be maintained below the refer-	EN-
	ence 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	130910
	VEGAFLEX 81 • Profibus PA

		4 Mounting
		products.These blocking distances for different 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		The process fitting 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 specified in chapter "Technical
		data" or on the type label of the sensor.
Standpipes or bypass		Standpipes or bypass tubes are normally metal tubes with a diameter
tubes		of 30 … 200 mm (1.18 … 7.87 in).In measurement technology, such
		a tube corresponds to a coax probe.It does not matter if the stand-
		pipe is perforated or slotted for better mixing.Lateral inlets in bypass
		tubes also do not influence the measurement.
		For bypass tubes, select the probe length such that the blocking
		distance (dead band) of the probe is above or below the lateral filling
		openings.You can thus measure the complete range of the medium in
		the bypass tube.When designing the bypass tube, keep the blocking
		distance of the probe in mind and select the length above the upper
		lateral filling opening accordingly.
		Microwaves can penetrate many plastics.For process technical rea-
		sons, plastic standpipes are problematic.If durability is no problem,
		then we recommend the use of metal standpipes.
		When theVEGAFLEX 81 is used in standpipes or bypass tubes,
		contact with the tube wall must be avoided.We recommend for this
		purpose a cable probe with centering weight.
		With rod probes, a spacer is generally not required.However, if there
		is a risk of the rod probe being pressed against the tube wall by in-
		flowing medium, you should mount a spacer at the probe end to avoid
		contact with the tube wall.In the case of cable probes, the cable can
		be strained.
		Keep in mind that buildup can form on the spacers.Strong buildup
		can influence the measurement.

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4 Mounting

1

2

3

Fig. 12: Position of the spacer or centering weight

1Rod probe with spacer (PEEK)

2Cable probe with centering weight

3Spacer (PEEK) on the gravity weight of a cable probe

Note:

Measurement in a standpipe is not recommended for extremely adhesive products.

Instructions for the measurement:

•The 100 % point should not be above the upper tube connection to the vessel

•The 0 % point should not be below the lower tube connection to the vessel

•A false signal suppression with installed sensor is generally recommended to achieve maximum possible accuracy.

Fasten	If there is a risk of the cable probe touching the vessel wall during
	operation due to product movements or agitators, etc., the measuring
	probe should be securely fixed.
	In the gravity weight there is an internal thread (M8), e.g.for an eye-
	bolt (optional) - (article no.2.1512).
	Make sure that the probe cable is not completely taut.Avoid tensile
	loads on the cable.
	Avoid undefined vessel connections, i.e.the connection must be
	either grounded reliably or isolated reliably.Any undefined change of
	this requirement can lead to measurement errors.

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4 Mounting

1	1
	2
2

Fig. 13: Fasten the probe

1Probe

2Retaining sleeve

Lateral installation	In case of difficult installation conditions, the probe can be also
	mounted laterally.For this purpose, adapt the rod with rod extensions
	or bow-shaped segments.
	Let the probe length determine automatically by the instrument to
	compensate the resulting running time changes.
	The determine probe length can deviate from the actual probe length
	when using bow-shaped segments.
	If installations such as struts, ladders, etc.exist on the vessel wall,
	then the probe should have a distance to the vessel wall of at least
	300 mm (11.81 in).
	You can find further information in the supplementary instructions of
	the rod extension.
Rod extension	In case of difficult 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 find further information in the supplementary instructions of
	the rod extension.

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5 Connecting to power supply

5 Connecting to power supply

	5.1		Preparing the connection
Safety instructions	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	The voltage supply is provided by a Profibus DP /PA segment coupler.
	The voltage supply range can differ depending on the instrument
	version.You can find the data for voltage supply in chapter "Technical
	data".
Connection cable	Connection is made with screened cable according to the Profibus
	specification.Power supply and digital bus signal are carried over the
	same two-wire connection cable.
	Use cable with round cross-section.A cable outer diameter of
	5 … 9 mm (0.2 … 0.35 in) ensures the seal effect of the cable gland.
	If you are using cable with a different diameter or cross-section,
	exchange the seal or use a suitable cable gland.
	Please make sure that your installation is carried out according to the
	Profibus specification.In particular, make sure that the termination of
	the bus is done with appropriate terminating resistors.
	You can find detailed information of the cable specification, installa-
	tion and topology in the "Profibus PA - User and Installation Guide-
	line" on www.profibus.com.
Cable gland ½ NPT	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".
Cable screening and	Make sure that the cable screen and grounding are carried out ac-
grounding	cording to Fieldbus specification.We recommend to connect the
	cable screen to ground potential on both ends.
	With systems with potential equalisation, connect the cable screen
	directly to ground potential at the power supply unit, in the connection
	box and at the sensor.The screen in the sensor must be connected
	directly to the internal ground terminal.The ground terminal outside
	on the housing must be connected to the potential equalisation (low
	impedance).
	5.2		Connecting
Connection technology	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.
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5 Connecting to power supply

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 reinserting the terminal block, you should hear it snap in.

Connection procedure	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

Fig. 14: Connection steps 5 and 6 - Single chamber housing

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Fig. 15: Connection steps 5 and 6 - Double chamber housing

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5 Connecting to power supply

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

Information:

Solid cores as well as flexible cores with wire end sleeves are inserted directly into the terminal openings.In case of flexible cores without end sleeves, press the terminal from above with a small screwdriver; the terminal opening is freed.When the screwdriver is released, the terminal closes again.

You can find 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.Reinsert the display and adjustment module, if one was installed

11.Screw the housing cover back on

The electrical connection is hence finished.

Electronics and connection compartment

5.3Wiring plan, single chamber housing

The following illustration applies to the non-Ex, Ex-ia and Ex-d version.

2

3

	0		9	0	2	9	0	2
	1	1	8		1	8		1
					3			3	4
			7			7
Bus	0		6	5	4	6	5	4

(+)	2	(-)	5	6	7	8	5
1

1

Fig. 16: Electronics and connection compartment, single chamber housing

1Voltage supply, signal output

2For display and adjustment module or interface adapter

3Selection switch for bus address

4For external display and adjustment unit

5Ground terminal for connection of the cable screen

5.4Wiring plan, double chamber housing

The following illustrations apply to the non-Ex as well as to the Ex-ia version.

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5 Connecting to power supply

Electronics compartment

2 3

Bus

0

1

0

1

9 8

7 6

0

5

1

2

3 4

9 8

7 6

0

5

1

2

3 4

(+)	2	(-)	5	6	7	8
1

1 1

Fig. 17: Electronics compartment, double chamber housing

1Internal connection to the connection compartment

2Contact pins for the display and adjustment module or interface adapter

3Selection switch for bus address

Information:

The connection of an external display and adjustment unit is not pos-

sible with this double chamber housing.

Connection compartment

2

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Bus
(+)1	2(-)	3

1

Connection compartment - Radio module PLICSMOBILE

Fig. 18: Connection compartment, double chamber housing

1Voltage supply, signal output

2For display and adjustment module or interface adapter

3Ground terminal for connection of the cable screen

Status

SIM-Card

Test

USB

(+)1

2(-)

1

Fig. 19: Connection compartment radio module PLICSMOBILE 1 Voltage supply

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5 Connecting to power supply

You can find detailed information on connection in the supplementary instructions "PLICSMOBILE GSM/GPRS radio module".

5.5Wiring plan, Ex-d-ia double chamber housing

Electronics compartment

2 3

Bus

0

1

0

1

9 8

7 6

0

5

1

2

3 4

9 8

7 6

0

5

1

2

3 4

(+)	2	(-)	5	6	7	8
1

1 4

Fig. 20: Electronics compartment, double chamber housing

1Internal connection to the connection compartment

2Contact pins for the display and adjustment module or interface adapter

3Selection switch for bus address

4Internal connection to the plug connector for external display and adjustment unit (optional)

Connection compartment

Bus
(+)1	2(-)	2
1

Fig. 21: Connection compartment, double chamber housing Ex d

1Voltage supply, signal output

2Ground terminal for connection of the cable screen

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5 Connecting to power supply

Electronics compartment

1

2

3

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Assignment of the plug connector

Wire assignment, connection cable

Fig. 22: View to the electronics compartment

1DIS-ADAPT

2Internal plug connection

3Plug connector M12 x 1

4

3

1

2

Fig. 23: Top view of the plug connector

1Pin 1

2Pin 2

3Pin 3

4Pin 4

Contact pin	Colour connection ca-	Terminal, electronics
	ble in the sensor	module
Pin 1	Brown	5
Pin 2	White	6
Pin 3	Blue	7
Pin 4	Black	8

5.6Wiring plan - version IP 66/IP 68, 1 bar

1

2

Fig.24:Wire assignment fix-connected connection cable

1brown (+) and blue (-) to power supply or to the processing system

2Shielding

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5 Connecting to power supply

Supplementary electronics - Radio module PLICSMOBILE

5.7Supplementary electronics

The radio module PLICSMOBILE is an external GSM/GPRS radio unit for transmission of measured values and for remote parameter adjustment.

Status

SIM-Card

Test

USB

(+)1

2(-)

1

Fig. 25: Radio module PLICSMOBILE integrated in the connection compartment

1 Voltage supply

You can find detailed information on connection in the supplementary instructions "PLICSMOBILE GSM/GPRS radio module".

5.8Set instrument address

Instrument address	An address must be assigned to each Profibus PA instrument.The
	approved addresses are between 0 and 126.Each address must
	only be assigned once in the Profibus PA network.The sensor is only
	recognized by the control system if the address is set correctly.

When the instrument is shipped, address 126 is adjusted.This address can be used for function test of the instrument and for connection to a Profibus PA network.Then address must be changed to integrate additional instruments.

The address setting is carried out either via:

•The address selection switch in the electronics compartment of the instrument (address setting via hardware)

•The display and adjustment module (address setting via software)

•PACTware/DTM (address setting via software)

Hardware addressing The hardware addressing is effective if an address <126 is adjusted with the address selection switches on the instrument.Hence the software addressing is no longer effective, the adjusted hardware address is valid.

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30	VEGAFLEX 81 • Profibus PA