VEGA VEGAMET 841 Operating Instructions

Operating Instructions

Controller in field housing for a continuously measuring analogue level sensor

VEGAMET 841

4 … 20 mA

Document ID: 58864

Contents

Contents

1 About this document................................................................................................................		4
1.1	Function............................................................................................................................	4
1.2	Target group......................................................................................................................	4
1.3	Symbols used...................................................................................................................	4

2 For your safety..........................................................................................................................		5
2.1	Authorised personnel........................................................................................................	5
2.2	Appropriate use................................................................................................................	5
2.3	Warning about incorrect use.............................................................................................	5
2.4	General safety instructions................................................................................................	5
2.5	Installation and operation in the USA and Canada............................................................	6
2.6	Safety instructions for Ex areas.........................................................................................	6

3 Product description..................................................................................................................		7
3.1	Configuration....................................................................................................................	7
3.2	Principle of operation........................................................................................................	9
3.3	Adjustment........................................................................................................................	9
3.4	Packaging, transport and storage...................................................................................	10
3.5	Accessories....................................................................................................................	11

4	Mounting..................................................................................................................................		12
	4.1	General instructions........................................................................................................	12
	4.2	Mounting instructions......................................................................................................	12
5	Connecting to power supply.................................................................................................		15
	5.1	Preparing the connection................................................................................................	15
	5.2	Sensor input mode active/passive..................................................................................	15
	5.3	Connecting.....................................................................................................................	16
	5.4	Wiring plan......................................................................................................................	17
	5.5	Switch-on phase.............................................................................................................	17
6	Access protection...................................................................................................................		19
	6.1	Bluetooth radio interface.................................................................................................	19
	6.2	Protection of the parameterization..................................................................................	19
	6.3	Storing the codes in myVEGA.........................................................................................	20
7	Set up with the integrated display and adjustment unit.....................................................		21
	7.1	Adjustment system..........................................................................................................	21
	7.2	Measured value and menu item display..........................................................................	22
	7.3	Menu overview................................................................................................................	23
	7.4	Setup steps.....................................................................................................................	24
8	Setup with smartphone/tablet (Bluetooth)..........................................................................		30
	8.1	Preparations...................................................................................................................	30
	8.2	Connecting.....................................................................................................................	30
	8.3	Parameter adjustment.....................................................................................................	31
9	Setup with PC/notebook (Bluetooth)....................................................................................		32
	9.1	Preparations...................................................................................................................	32
	9.2	Connecting.....................................................................................................................	32
	9.3	Parameter adjustment.....................................................................................................	33
10	Applications and functions...................................................................................................		34
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				Contents
	10.1	Level measurement in storage tanks with overfill protection/dry run protection...............		34
	10.2	Pump station with pump control function.........................................................................		37
	10.3	Flow measurement flume/weir........................................................................................		44
11	Diagnostics and servicing.....................................................................................................			48
	11.1	Maintenance...................................................................................................................		48
	11.2	Rectify faults...................................................................................................................		48
	11.3	Diagnosis, fault messages..............................................................................................		48
	11.4	Software update..............................................................................................................		50
	11.5	How to proceed if a repair is necessary..........................................................................		51
12 Dismount.................................................................................................................................				52
	12.1	Dismounting steps..........................................................................................................		52
	12.2	Disposal..........................................................................................................................		52
13	Certificates and approvals....................................................................................................			53
	13.1	Radio licenses................................................................................................................		53
	13.2	Approvals for Ex areas....................................................................................................		53
	13.3	Approvals as overfill protection.......................................................................................		53
	13.4	EU conformity.................................................................................................................		53
	13.5	Environment management system..................................................................................		53
14 Supplement.............................................................................................................................				54
	14.1	Technical data.................................................................................................................		54
	14.2	Overview applications/functionality.................................................................................		57
	14.3	Dimensions.....................................................................................................................		60
	14.4	Industrial property rights.................................................................................................		62
	14.5	Licensing information for open source software..............................................................		62
	14.6	Trademark.......................................................................................................................		62

	Editing status: 2021-02-25
VEGAMET 841 • 4 … 20 mA	3

1 About this document

1 About this document

1.1Function

This instruction provides all the information you need for mounting, connection and setup as well as important instructions for maintenance, fault rectification, the exchange of parts and the safety of the user. 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 personnel.

The contents of this manual must be made available to the qualified personnel and implemented.

1.3Symbols used

Document ID

This symbol on the front page of this instruction refers to the Document ID. By entering the Document ID on www.vega.com you will reach the document download.

Information, note, tip: This symbol indicates helpful additional information and tips for successful work.

Note: This symbol indicates notes to prevent failures, malfunctions, damage to devices or plants.

Caution: Non-observance of the information marked with this symbol may result in personal injury.

Warning: Non-observance of the information marked with this symbol may result in serious or fatal personal injury.

Danger: Non-observance of the information marked with this symbol results in serious or fatal personal injury.

Ex applications

This symbol indicates special instructions for Ex applications.

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

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 documentation must be carried out only by trained, qualified 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

VEGAMET 841 is a universal controller for connection of a 4 … 20 mA sensor.

You can find detailed information about the area of application 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 this product can give rise to applica- tion-specific hazards, e.g.vessel overfill through incorrect mounting or adjustment. Damage to property and persons or environmental contamination can result. Also, the protective characteristics of the instrument can be impaired.

2.4General safety instructions

This is a state-of-the-art instrument complying with all prevailing regulations and directives. 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. When measuring aggressive or corrosive media that can cause a dangerous situation if the instrument malfunctions, the operator has to implement suitable measures to make sure the instrument is functioning properly.

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.For safety reasons, only the accessory specified by the manufacturer must be used.

To avoid any danger, the safety approval markings and safety tips on the device must also be observed.

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2 For your safety

2.5Installation and operation in the USA and Canada

This information is only valid for USA and Canada. Hence the following text is only available in the English language.

Installations in the US shall comply with the relevant requirements of the National Electrical Code (ANSI/NFPA 70).

Installations in Canada shall comply with the relevant requirements of the Canadian Electrical Code.

2.6Safety instructions for Ex areas

For Ex applications, only devices with corresponding Ex approval may be used.Observe the Ex-specific safety instructions.These are an integral part of the operating instructions and are enclosed with every device with Ex approval.

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3 Product description

	3	Product description
	3.1 Configuration
Scope of delivery	The scope of delivery encompasses:
	•	Controller VEGAMET 841
	•	Mounting plate
	•	Screws/plugs for mounting
	•	Cable glands/Blind plugs (optional)
	•	Information sheet " Documents and software" with:
		–– Instrument serial number
	•	–– QR code with link for direct scanning
		Information sheet " PINs and Codes" with:
	•	–– Bluetooth access code
		Information sheet " Access protection" with:
		–– Bluetooth access code

–– Emergency Bluetooth unlock code –– Emergency device code

The further scope of delivery encompasses:

•Documentation

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

––Radio licenses

––If necessary, further certificates

Note:

Optional instrument features are also described in this operating instructions manual. The respective scope of delivery results from the order specification.

Scope of this operating	This operating instructions manual applies to the following instrument
instructions	versions:
	•	Hardware version from 1.0.0
	•	Software version from 1.10.0

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3 Product description

Constituent parts

		1
		2
		3
		4
	Fig. 1: VEGAMET 841
	1	Display and adjustment unit
	2	Housing with cable glands and connection compartment
	3	Mounting plate
	4	Ventilation/pressure compensation
Type label	The type label contains the most important data for identification and
	use of the instrument:
	•	Instrument type
	•	Information about approvals
	•	Technical data
	•	Serial number of the instrument
	•	QR code for device documentation
	•	Number code for Bluetooth access
	•	Manufacturer information

Documents and software Move to " www.vega.com" and enter in the search field the serial number of your instrument.

There you can find the following information about the instrument:

• Order data

• Documentation

• Software

Alternatively, you can find all via your smartphone:

•Scan the QR-code on the type label of the device or

•Enter serial number manually in the VEGA Tools app (available free of charge in the respective stores)

Information:

If the serial number or the QR code on the type label cannot be read, they can be found additionally on the display cover inside the device.

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			3 Product description
		3.2	Principle of operation
Application area		The VEGAMET 841 controller feeds the connected 4 … 20 mA
		sensor, processes the measured values and displays them. A large
		display for data visualisation is integrated in the housing designed for
		rough field conditions.
		It enables simple implementation of pump controls, flow measure-
		ments on open channels and weirs and totalizers. With the VEGAMET
		841, limit values can be reliably monitored and relays can be
		switched, e.g.for an overfill protection according toWHG.
		Due to its various possibilities it is suitable for many industrial
		branches.
Functional principle		The VEGAMET 841 controller can power the connected sensor and
		process its measurement signals. The requested parameter is shown
		on the display and also output to the integrated current output for fur-
		ther processing. The measurement signal can thus be transferred to a
		remote display or a superordinate control system. Operating relays for
		control of pumps or other devices are also integrated.
		3.3	Adjustment
Local adjustment		On-site adjustment of the device is carried out via the integrated
		display and adjustment unit.

Wireless adjustment The optionally integrated Bluetooth module enables in addition a wireless adjustment of VEGAMET 841 via standard adjustment tool:

•Smartphone/tablet (iOS or Android operating system)

•PC/notebook with Bluetooth LE or Bluetooth USB adapter (Windows operating system)

Information:

Certain setting options are not possible or only possible to a limited extent with the integrated display and adjustment unit, for example the settings for flow measurement or pump control.For these applications, the use of PACTware/DTM or the VEGA Tools app is recommended. An overview of the available applications and functions as well as their adjustment options can be found in the appendix.

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3 Product description

2

1

3

Fig. 2: Wireless connection to standard adjustment tools with integrated

Bluetooth LE or alternatively Bluetooth USB adapter.

1	VEGAMET 841
2	Smartphone/Tablet
3	PC/Notebook

	3.4 Packaging, transport and storage
Packaging	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 consists of environment-friendly, recyclable card-
	board. 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 in due 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 con-
	cealed defects must be appropriately dealt with.

Storage

Storage and transport temperature

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 %

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		3 Product description
		3.5 Accessories
Sun shade		The sun protection protects the device from direct sunlight and thus
		prevents overheating of the electronics. It also improves the readabil-
		ity of the display when exposed to sunlight. The sun protection can be
		used for wall and pipe mounting.
Pipe mounting set		The pipe mounting set is used for optimal and safe mounting of the
		devices in horizontal and vertical mounting on pipes.

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4 Mounting

	4	Mounting
	4.1	General instructions
Mounting options	The field housing of theVEGAMET 841 is equally suitable for outdoor
	or indoor installation due to its degree of protection IP66/IP67 and
	Type 4X. The standard version is designed for wall mounting. A
	mounting adapter for pipe mounting is available as an option.
Ambient conditions	The instrument is suitable for standard and extended ambient condi-
	tions acc. to DIN/EN/IEC/ANSI/ISA/UL/CSA 61010-1. It can be used
	indoors as well as outdoors.
	Avoid direct sunlight or use the optionally available sun shade.
	Make sure that the environmental and ambient conditions specified in
	chapter " Technical data" are maintained.

Protection against mois- Protect your instrument against moisture ingress through the following
ture	measures:
	•	Use the recommended connection cable (see chapter " Connect-
		ing to power supply")
	•	Tighten the cable gland
	•	Mount the instrument in such a way that the cable glands point
		downward
	•	Loop the connection cable downward in front of the cable gland
	This applies mainly to outdoor installations, in areas where high
	humidity is expected (e.g. through cleaning processes) and on cooled
	or heated vessels.
	The visible area of the front panel must be protected from knocks,
	otherwise water can penetrate through breaking of the front foil. In this
	case, protection against accidental contact can no longer be ensured.
	Caution:
	Make sure that during installation or maintenance no moisture or dirt
	can get inside the instrument.
	To maintain the housing protection, make sure that the housing lid is
	closed during operation and locked, if necessary.

Pressure compensation The pressure compensation for the housing is realized via a breather

	element.
	Note:
	Make sure that the pressure equalization element is always free of
	buildup during operation. A high-pressure cleaner may not be used
	for cleaning.
	4.2 Mounting instructions
Wall mounting	Fix the mounting plate to the wall using the screws and dowels sup-
	plied as shown in the figure below.Make sure that the arrows on the
	mounting plate point upwards.
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4 Mounting

Loosen the four screws in the housing cover and open it to the left. Fasten the device to the mounting plate using the screws (M5) supplied.

82 mm (3.23")

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	ø7 mm
	(0.28")
	ø13 mm
	(0.51")
	Fig. 3: Mounting plate for wall mounting VEGAMET 841
Tube mounting	The optionally available mounting accessories are required for tube
	mounting. The kit consists of two pairs of mounting brackets and four
	mounting screws M6 x 100.
	The mounting brackets are screwed to the mounting plate and the
	tube as shown in the following illustration.
	Loosen the four screws in the housing cover and open it to the left.
	Fasten the device to the mounting plate using the screws (M5) sup-
	plied.

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4 Mounting

Mounting sun shade

14

1

2

3

4

5

Fig. 4: Tube mounting

1VEGAMET 841

2Mounting plate

34 screws M6 x 100

4Mounting brackets

5Pipe for diameter 29 … 60 mm (1.14" to 2.36")

The optional sun protection can be used to protect against direct sunlight. The sunshade is simply mounted between the mounting plate and the controller, this is possible for both wall and pipe mounting.

1	2	3	4	5	6

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	2	Sun shade
	1	VEGAMET 841
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	6	Pipe for diameter 29 … 60 mm (1.14" to 2.36")

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Safety instructions

Voltage supply

Connection cable

Cable glands

5 Connecting to power supply

5 Connecting to power supply

5.1Preparing the connection

Always keep in mind the following safety instructions:

•The electrical connection must only be carried out by trained, qualified personnel authorised by the plant operator.

•If overvoltage surges are expected, overvoltage arresters should be installed.

Warning:

Only connect or disconnect in de-energized state.

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

The instrument belongs to protection class I, hence connection of an earth conductor is required.

Use cable with round cross section. The cable diameter must be suitable for the cable gland used to ensure the seal effect of the cable gland (IP protection).

The voltage supply is connected with standard cable according to the national installation standards.

Standard two-wire cable can be used to connect the sensors.

Note:

If the temperatures are too high, the cable insulation can be damaged. Hence keep apart from the ambient temperature also the selfheating of the instrument for the temperature resistance of the cable in the connection compartment in mind. 1)

When used in the USA/Canada, only cables with copper conductors may be used.

Warning:

In delivery status, all openings are fitted with dust protection caps.

These caps are only for protection during transport and are not suitable for protection during operation! Instead, all openings must be closed with cable glands/blind plugs.

Cable glands, NPT adapters or blind plugs that are not included in the scope of delivery must meet the applicable requirements in order to ensure the environmental compatibility of the housing. For outdoor applications, the weather resistance of the accessories to be used must be taken into account. The cable glands, NPT adapters and blind plugs must have a metric thread M20 to be compatible with the threaded openings of the metal plate in the housing.

5.2Sensor input mode active/passive

Through the selection of the terminals, you can choose between active and passive operation of the sensor input.

1)With an ambient temperature ≥ 50 °C (122 °F) the connection cable should be suitable for an ambient temperature which is at least 20 °C (36 °F) higher.

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5 Connecting to power supply

•In active mode, the controller provides the power for the connected sensors. Power and measurement data are transmitted over the same two-wire cable. This mode is provided for connection of measuring transducers without separate power supply (sensors in two-wire version).

•In passive mode the sensors are not powered, only the measured value is transmitted. This input is for connection of transmitters with their own separate voltage supply (sensors in four-wire version). The VEGAMET 841 can also be looped into the existing circuit like a normal ammeter.

Note:

With a VEGAMET 841 in Ex version, the passive input is not available.

5.3Connecting

Connection technology The voltage supply and inputs and outputs are connected via the spring-loaded terminals.

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, a small screwdriver must be pressed into the rectangular opening so that the terminal opening is then free. When the screwdriver is pulled out, the terminals are closed again.

You can find further information on the max.wire cross-section in the technical data.

Connecting

Connect the device as described in the following wiring plan.

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5 Connecting to power supply

5.4Wiring plan

		Relay Output			Current
Power		1	2	3	Output	Sensor
91 92		61 62 63 64 65 66 67 68 69			41 42	1	2	3
+	-				+ -
L	N
	1		2		3		4
	5

Fig. 6: Wiring plan VEGAMET 841

1Voltage supply of the controller

2Relay outputs 1 … 3

3Current output

4Sensor input (active/passive) with HART communication sockets

5Ground terminal for protective conductor

Detail sensor connection 1

	1	2	3	6	1	2	3
	1							2
3	+		-			+	-	4
								5

Fig. 7: Sensor input 1 for two-wire/four-wire sensor (active/passive)

1Active input with sensor supply for two-wire sensor

2Passive input without sensor supply for four-wire sensor 2)

3Two-wire sensor

4Four-wire sensor

5Voltage supply for four-wire sensor

6HART communication sockets for connection of a VEGACONNECT

5.5Switch-on phase

After switching on, the device first carries out a short self-check.

•Internal check of the electronics

•Output signals are set to failure, background lighting of the display lights red

2) Passive input not available for Ex version

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5 Connecting to power supply

The current measured values are then displayed and transmitted to the outputs. The background lighting of the display changes to white.

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6 Access protection

			6		Access protection
			6.1		Bluetooth radio interface
				Devices with a Bluetooth radio interface are protected against un-
				wanted access from outside. This means that only authorized persons
				can receive measured and status values and change device settings
				via this interface.
				Information:
				If no Bluetooth connection to the device should be possible, Bluetooth
				communication can be deactivated. Access via app or DTM is thus no
				longer possible. The Bluetooth function can be deactivated/activated
				in the menu item " Extended functions" under " Access protection -
				Bluetooth communication".
Bluetooth access code				A Bluetooth access code is required to establish Bluetooth com-
				munication via the adjustment tool (smartphone/tablet/notebook).
				This code must be entered once when Bluetooth communication is
				established for the first time in the adjustment tool.It is then stored in
				the adjustment tool and does not have to be entered again.
				The Bluetooth access code is individual for each device. It is printed
				on the device housing and is also supplied with the device in the
				information sheet " PINs and Codes". The Bluetooth access code can
				also be read out via the display and adjustment unit.
				The Bluetooth access code can be changed by the user after the first
				connection is established. If the Bluetooth access code is entered
				incorrectly, the new entry is only possible after a waiting period has
				elapsed. The waiting time increases with each further incorrect entry.
Emergency Bluetooth				The emergency Bluetooth access code enables Bluetooth communi-
unlock code				cation to be established in the event that the Bluetooth access code
				is no longer known. It can't be changed. The emergency Bluetooth
				access code can be found in information sheet " Access protection".
				If this document is lost, the emergency Bluetooth access code can
				be retrieved from your personal contact person after legitimation.
				The storage and transmission of Bluetooth access codes is always
				encrypted (SHA 256 algorithm).
				6.2 Protection of the parameterization
				The settings (parameters) of the device can be protected against un-
				wanted changes. The parameter protection is deactivated on delivery,
				all settings can be made.
Device code				To protect the parameterization, the device can be locked by the user
				with the aid of a freely selectable device code. The settings (param-
				eters) can then only be read out, but not changed. The device code
				is also stored in the adjustment tool. However, unlike the Bluetooth
				access code, it must be re-entered for each unlock. When using the
				adjustment app or DTM, the stored device code is then suggested to
				the user for unlocking.
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6 Access protection

Emergency device code The emergency device code allows unlocking the device in case the device code is no longer known. It can't be changed. The emergency device code can also be found on the supplied information sheet " Access protection". If this document is lost, the emergency device code can be retrieved from your personal contact person after legitimation. The storage and transmission of the device codes is always encrypted (SHA 256 algorithm).

6.3Storing the codes in myVEGA

If the user has a " myVEGA" account, then the Bluetooth access code as well as the device code are additionally stored in his account under " PINs and Codes".This greatly simplifies the use of additional adjustment tools, as all Bluetooth access and device codes are automatically synchronized when connected to the " myVEGA" account

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	7 Set up with the integrated display and adjustment unit
	7 Set up with the integrated display and
	adjustment unit
	7.1 Adjustment system
Function	The integrated display and adjustment unit is used for measured val-
	ue display, adjustment and diagnosis of the VEGAMET 841. Display
	and adjustment are carried out via four keys and a graphic-capable
	display with background lighting.
	Certain setting options are not possible or only possible to a limited
	extent with the integrated display and adjustment unit, for example the
	settings for flow measurement or pump control.For these applica-
	tions, the use of PACTware/DTM or the VEGA Tools app is recom-
	mended. A tabular overview of the corresponding applications and
Display and adjustment	functions can be found in the appendix.
elements
	1	3
		4
	2	5

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HART communication sockets

Key functions

Fig. 8: Display and adjustment elements

1LC display

2Adjustment keys

3Status indication relay

4Status indication fault signal

5Status indication operation

Via the HART communication sockets integrated in the terminals, a parameter adjustment of the connected HART sensors can be carried out without interrupting the measuring circuit. The resistor required for this purpose (230 Ω) is already integrated inVEGAMET 841.The sockets have an inner diameter of 2 mm for direct connection of a VEGACONNECT or other HART modems. The adjustment of the connected sensor is carried out via the VEGA Tools app or via PACTware and appropriate DTM.

Key	Function
[OK]	Entry to the menu level
	Jump to selected menu item
	Edit parameter
	Save value

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