Vega VEGAPULS Air 41 Operating instructions

Operating Instructions

Radar sensor for continuous level

measurement

VEGAPULS Air 41

Autarkic device with measured value trans-

mission via radio technology

Document ID: 64808

Contents

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

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 Lithium cells ..................................................................................................................... 6

2.6 Country of use .................................................................................................................. 6

3 Product description ................................................................................................................. 7

3.1 Conguration .................................................................................................................... 7

3.2 Principle of operation........................................................................................................ 8

3.3 Adjustment ....................................................................................................................... 9

3.4 Packaging, transport and storage ................................................................................... 10

4 Mounting ................................................................................................................................. 11

4.1 General instructions ....................................................................................................... 11

4.2 Mounting instructions ..................................................................................................... 11

5 Access protection .................................................................................................................. 16

5.1 Bluetooth radio interface ................................................................................................ 16

5.2 Protection of the parameterization .................................................................................. 16

5.3 Storing the codes in myVEGA ........................................................................................ 17

6 Operating modes, activate device ........................................................................................ 18

7 Setup with smartphone/tablet (Bluetooth) .......................................................................... 21

7.1 Preparations ................................................................................................................... 21

7.2 Connecting ..................................................................................................................... 21

7.3 Parameter adjustment .................................................................................................... 22

8 Setup with PC/notebook (Bluetooth) ................................................................................... 23

8.1 Preparations ................................................................................................................... 23

8.2 Connecting ..................................................................................................................... 23

8.3 Parameter adjustment .................................................................................................... 24

9 Menu overview ....................................................................................................................... 26

10 Diagnostics and servicing .................................................................................................... 29

10.1 Maintenance .................................................................................................................. 29

10.2 Rectify faults ................................................................................................................... 29

10.3 Status messages according to NE 107 .......................................................................... 30

10.4 Treatment of measurement errors .................................................................................. 32

10.5 Replacing lithium cells .................................................................................................... 36

10.6 Software update ............................................................................................................. 37

10.7 How to proceed if a repair is necessary .......................................................................... 37

11 Dismount................................................................................................................................. 38

11.1 Dismounting steps.......................................................................................................... 38

Contents

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

11.2 Disposal ......................................................................................................................... 38

12 Certicatesandapprovals .................................................................................................... 39

12.1 Radio licenses ................................................................................................................ 39

12.2 EU conformity ................................................................................................................. 39

12.3 Environment management system ................................................................................. 39

13 Supplement ............................................................................................................................ 40

13.1 Technical data ................................................................................................................ 40

13.2 Radio networks LTE-M and NB-IoT ................................................................................ 43

13.3 Radio networks LoRaWAN - Data transmission ............................................................. 44

13.4 Dimensions .................................................................................................................... 46

13.5 Industrial property rights ................................................................................................. 47

13.6 Licensing information for open source software ............................................................. 47

13.7 Trademark ...................................................................................................................... 47

Safety instructions for Ex areas

TakenoteoftheExspecicsafetyinstructionsforExapplications.

These instructions are attached as documents to each instrument

with Ex approval and are part of the operating instructions.

Editing status: 2021-02-10

1 About this document

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

1 About this document

1.1 Function

This instruction provides all the information you need for mounting,

connection and setup as well as important instructions for mainte-

nance,faultrectication,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.

1.2 Target group

This operating instructions manual is directed to trained personnel.

Thecontentsofthismanualmustbemadeavailabletothequalied

personnel and implemented.

1.3 Symbols used

Document ID

This symbol on the front page of this instruction refers to the Docu-

ment ID. By entering the Document ID on www.vega.com you will

reach the document download.

Information, note, tip: This symbol indicates helpful additional infor-

mation 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.

•

List

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

1 Sequence of actions

Numbers set in front indicate successive steps in a procedure.

Battery disposal

This symbol indicates special information about the disposal of bat-

teries and accumulators.

2 For your safety

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

2 For your safety

2.1 Authorised personnel

All operations described in this documentation must be carried out

onlybytrained,qualiedpersonnelauthorisedbytheplantoperator.

During work on and with the device, the required personal protective

equipment must always be worn.

2.2 Appropriate use

The VEGAPULS Air 41 is an autarkic sensor for continuous level

measurement.

Youcannd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specicationsintheoperatinginstructions

manual as well as possible supplementary instructions.

2.3 Warning about incorrect use

Inappropriate or incorrect use of this product can give rise to applica-

tion-specichazards,e.g.vesseloverll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.

2.4 General 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awlessandreliablecondition.Theoperatorisresponsi-

ble 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.

The safety instructions in this operating instructions manual, the na-

tional 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. Arbi-

traryconversionsormodicationsareexplicitlyforbidden.Forsafety

reasons,onlytheaccessoryspeciedbythemanufacturermustbe

used.

To avoid any danger, the safety approval markings and safety tips on

the device must also be observed.

The low transmitting power of the radar sensor as well as the inte-

grated LTE-NB1, LTE-CAT-M1 or LoRa radio module is far below

the internationally approved limits. No health impairments are to be

expected with intended use. The band range of the transmission

frequency can be found in chapter " Technical data".

2 For your safety

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

2.5 Lithium cells

The power supply of the device is provided by integrated lithium cells

in the housing. If the device is used as intended with the lid closed

withinthetemperaturesandpressuresspeciedinthetechnicaldata,

it is thus adequately protected.

Note:

Pleaseobservethespecicsafetyinstructionsinthescopeofdeliv-

ery of the device.

2.6 Country of use

Selectionofthecountryofusedenescountry-specicsettingsfor

transmission into the mobile radio network or LoRaWan. It is impera-

tive to set the country of use with the respective operating tool in the

operating menu at the beginning of the setup (see chapter " Menu

Overview", " Main Menu", " Radio Transmission" .

Caution:

Operation of the device without selecting the country of use can lead

to malfunctions and constitutes a violation of the radio licensing regu-

lations of the respective country.

3 Product description

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

3 Product description

3.1 Conguration

The scope of delivery encompasses:

•

Radar sensor

•

IntegratedidenticationcardforLTE(eSIM)(optional)

•

Magnet for activation

•

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

– IdentierforLoRaWANnetwork(DeviceEUI,ApplicationEUI,

AppKey)

•

Information sheet " Access protection" with:

– Bluetooth access code

– Network access code (authentication/encryption for mobile

radio)

– Emergency Bluetooth unlock code

– Emergency device code

– IdentierforLoRaWANnetwork(DeviceEUI,ApplicationEUI,

AppKey)

The further scope of delivery encompasses:

•

Documentation

– Safety instructions for lithium metal cell

– Ifnecessary,furthercerticates

Note:

Optional instrument features are also described in this operating

instructions manual. The respective scope of delivery results from the

orderspecication.

This operating instructions manual applies to the following instrument

versions:

•

Hardware version from 1.0.0

•

Software version from 1.0.0

Scope of delivery

Scope of this operating

instructions

3 Product description

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64808-EN-210216

Fig. 1: Components of the VEGAPULS Air 41 sensor - Example version with

thread G1½

1 Radar antenna

2 Processtting

3 Contact surface for NFC communication

4 Cover

5 Ventilation

Thetypelabelcontainsthemostimportantdataforidenticationand

use of the instrument.

VEGAPULS Air 41

AR - 222 226

MWP: -1...+2bar(-100...+200kPa)

Device EUI E8E8B7000040BA20

www.vega.com

s/n: 49789937

IP66/67

15m

D-77761 Schiltach

Made in Germany

PVDF

LTE-NB-IoT, LTE-Cat-M1, LoRa

5 6

Fig. 2: Layout of the type label (example)

1 Product code

2 Field for approvals

3 Wireless signal outputs, frequency bands

4 Device EUI LoRa

5 Technical data

6 Bluetooth access code

7 QR code for device documentation

3.2 Principle of operation

VEGAPULS Air 41 is an autarkic radar sensor with radio technology

for continuous level measurement on vessels and tanks.

The device is suitable for almost all liquids as well as for bulk solids.

Depending on the version, mounting is carried out via thread:

•

G1½

•

1½ NPT

•

R1½

The measurement is carried out through a suitable nozzle opening on

the vessel.

Constituent parts

Type label

Application area

Functional principle

3 Product description

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

The instrument emits a continuous, frequency-modulated radar signal

throughitsantenna.Theemittedsignalisreectedbythemedium

andreceivedbytheantennaasanechowithmodiedfrequency.The

frequency change is proportional to the distance and is converted into

the level. The measured value is transmitted wirelessly as part of the

data transmission.

The measuring cycle described above is time-controlled via the

integrated clock. Outside of the measuring cycle, the device is in a

sleep mode.

Depending on the availability of the radio networks, the device trans-

mitsitsmeasuredvalueswirelesslytoanLTE-M(LTE-CAT-M1)orNB-

IoT(LTE-CAT-NB1)mobileradiooraplant-sideLoRaWANnetwork.

The transmission or evaluation is carried out via an Asset Manage-

ment System, e.g. VEGA Inventory System.

The device is supplied with energy by integrated, exchangeable pri-

mary cells. The lithium cell used for this purpose is a compact storage

device high cell voltage and capacity for a long service life.

3.3 Adjustment

The device is activated contactlessly from outside:

•

Via magnet

•

By NFC technology via smartphone/tablet with VEGA Tools app

The device has an integrated Bluetooth module, can be operated

wirelessly using standard operating tools:

•

Smartphone/tablet(iOSorAndroidoperatingsystem)

•

PC/notebook with Bluetooth USB adapter (Windows operating

system)

Fig. 3: Wireless connection to standard operating devices via Bluetooth

1 Sensor

2 Smartphone/Tablet

3 PC/Notebook

Measured value transmis-

sion

Voltage supply

Activation

Adjustment

3 Product description

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

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

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 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 con-

cealed 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 %

Packaging

Transport

Transport inspection

Storage

Storage and transport

temperature

4 Mounting

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

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4 Mounting

4.1 General instructions

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.

Note:

For safety reasons, the instrument must only be operated within the

permissibleprocessconditions.Youcannddetailedinformationon

the process conditions in chapter " Technical data" of the operating

instructions or on the type label.

Hence make sure before mounting that all parts of the instrument ex-

posed to the process are suitable for the existing process conditions.

The device measures the level only when aligned downwards.

To ensure this, the device has a GPS position sensor and an inde-

pendent position sensor.

Note:

If the container is aligned horizontally (e.g. tilted during transport of a

mobilecontainer)nomeasurementistaken.

4.2 Mounting instructions

Radar sensors for level measurement emit electromagnetic waves.

The polarization is the direction of the electrical component of these

waves.

The position of the polarisation is in the middle of the type label on the

instrument.

Fig. 4: Position of the polarisation

1 Middle of the type label

Note:

When the device is rotated, the direction of polarization changes and

hencetheinuenceofthefalseechoonthemeasuredvalue.Please

keep this in mind when mounting or making changes later.

When mounting the device, keep a distance of at least 200 mm

(7.874in)fromthevesselwall.Ifthedeviceisinstalledinthecenter

of dished or round vessel tops, multiple echoes can arise. However,

these can be suppressed by an appropriate adjustment (see chapter

" Setup").

If you cannot maintain this distance, you should carry out a false

signal suppression during setup. This applies particularly if buildup on

Ambient conditions

Process conditions

Transport, alignment,

position detection

Polarisation

Installation position

4 Mounting

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

the vessel wall is expected. In such cases, we recommend repeating

the false signal suppression at a later date with existing buildup.

> 200 mm

(7.87

Fig. 5: Mounting of the radar sensor on round vessel tops

In vessels with conical bottom it can be advantageous to mount the

device in the centre of the vessel, as measurement is then possible

down to the bottom.

Fig. 6: Mounting of the radar sensor on vessels with conical bottom

The sealing surface at the bottom of the hexagon is the beginning of

the measuring range and at the same time the reference plane for the

min./max. adjustment, see the following graphic:

Fig. 7: Reference plane

1 Reference plane

For nozzle mounting, the nozzle should be as short as possible and

itsendrounded.Thisreducesfalsereectionsfromthenozzle.

Theantennaedgeshouldprotrudeatleast5mm(0.2in)outofthe

nozzle.

Reference plane

Nozzle

4 Mounting

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

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≥ 5 mm

(

0.20

Fig. 8: Recommended socket mounting of VEGAPULS Air 41

Ifthereectivepropertiesofthemediumaregood,youcanmount

VEGAPULS Air 41 on sockets longer than the antenna. The socket

end should be smooth and burr-free, if possible also rounded.

Note:

When mounting on longer nozzles, we recommend carrying out a

false signal suppression (see chapter " Parameter adjustment").

Youwillndrecommendedvaluesforsocketheightsinthefollowing

illustration or the table. The values come from typical applications.

Deviating from the proposed dimensions, also longer sockets are

possible, however the local conditions must be taken into account.

Fig. 9: Socket mounting with deviating socket dimensions

Socket diameter d Socket length h

80 mm 3" ≤300mm ≤11.8in

100 mm 4" ≤400mm ≤15.8in

150 mm 6" ≤600mm ≤23.6in

In liquids, direct the device as perpendicular as possible to the me-

dium surface to achieve optimum measurement results.

Fig. 10: Alignment in liquids

In order to measure as much of the vessel volume as possible, the

device should be aligned so that the radar signal reaches the lowest

level in the vessel. In a cylindrical silo with conical outlet, the sensor is

mounted anywhere from one third to one half of the vessel radius from

theoutsidewall(seefollowingdrawing).

Alignment - Liquids

Orientation - Bulk solids

4 Mounting

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

rr...

Fig. 11: Mounting position and orientation

Due to optimum socket design, the device can be easily aligned to

the vessel centre. The necessary angle of inclination depends on the

vessel dimensions. It can be easily checked with a suitable bubble

tube or mechanic's level on the sensor.

Fig. 12: Proposal for installation after orientation VEGAPULS Air 41

The following table shows the necessary angle of inclination. It

depends on the measuring distance and the distance "a" between

vessel centre and installation position.

4 Mounting

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Distance d

(m)

2° 4° 6° 8° 10°

2 0.1 0.1 0.2 0.3 0.4

4 0.1 0.3 0.4 0.6 0.7

6 0.2 0.4 0.6 0.8 1.1

8 0.3 0.6 0.8 1.1 1.4

10 0.3 0.7 1.1 1.4 1.8

15 0.5 1 1.6 2.1 2.6

Example:

In a vessel 10 m high, the installation position of the sensor is 0.7 m

from the vessel centre.

The necessary angle of inclination of 4° can be read out from this

table.

5 Access protection

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

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5 Access protection

5.1 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.

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rst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 infor-

mation sheet " PINs and Codes". It can be changed by the user after

therstconnectionhasbeenestablished.IftheBluetoothaccess

code has not been entered correctly, a new entry can only be made

after a waiting period has elapsed. The waiting time increases with

each additional incorrect entry.

The emergency Bluetooth access code enables Bluetooth communi-

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).

5.2 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.

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.

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 " Ac-

cess 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 encrypt-

ed(SHA256algorithm).

Bluetooth access code

Emergency Bluetooth

unlock code

Device code

Emergency device code

5 Access protection

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

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5.3 Storing 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simpliestheuseofadditionaladjust-

ment tools, as all Bluetooth access and device codes are automati-

cally synchronized when connected to the " myVEGA" account

6 Operating modes, activate device

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

6 Operating modes, activate device

The VEGAPULS Air 41 has the following operating modes that can be

set via operating tools:

•

Deactivated

•

Activated

Information:

On delivery, the device is in the deactivated state and must be acti-

vated for operation using a smartphone or magnet.

The activation and function of these operating modes is described

below.

In the deactivated state, the device is not woken up by the integrated

clock despite a set measuring interval.

The fact that the sensor does not wake up and does not carry out

measurement cycles or communication means that the lithium cell is

not unnecessarily discharged. In this state, longer storage is possible

until the device is used.

The following options are available for activating the device from the

deactivated delivery status:

•

By smartphone with VEGA Tools app via NFC

•

Via magnet

By smartphone

Proceed as follows for activation by NFC:

1. Start VEGA Tools app on smartphone

2. Activate NFC communication

3. Hold the adjustment tool tightly on the instrument side with the

lettering " VEGA"

Fig. 13: Activate the sensor

1 Adjustment tool, e.g. smartphone

2 Contact surface for NFC communication

Theappconrmssuccessfulactivationandthedeviceisreadyfora

radio connection for 60 seconds.

Via magnet

Proceed as follows for activation by magnet:

Operating modes

Deactivated

Activate

6 Operating modes, activate device

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

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→

Hold the magnet close to the side of the device and move it

towards the housing cover

ACTIVATION

Magnet

ACTIVATION

Magnet

Fig. 14: Activate the sensor

1 Radar sensor

2 Contact surface for magnet

3 Magnet

The device is ready for a radio connection for 60 s.

Note:

If no Bluetooth connection is established within these 60 seconds,

the device automatically returns to sleep mode. If an established

Bluetooth connection is interrupted, a new connection is possible for

a further 10 seconds, etc.

When activated, the device is woken up by the integrated clock and

carriesoutameasurementcycle(measurementandtransmission).It

then automatically switches to an energy-saving sleep mode.

Themeasuringintervalrunsonthebasisofthefactorypre-congura-

tionorauser-setconguration.

Note:

In sleep mode, it is not possible to connect to the device via

Bluetooth.

The instrument can be deactivated via the VEGA Tools app or the

DTM, e.g. for temporary shutdown. The device is reactivated as

described above.

To transmit the measured values to the cloud, the device requires ac-

cess to mobile network or a LoRaWAN network at the installation site,

depending on the version. If no corresponding network is available, a

LoRaWAN gateway must be installed.

Note:

Ensure free access to the radio network. The device must not be cov-

ered by metal - especially at medium height - or even enclosed.

Note:

Simultaneous operation of LTE-M or LTE-IoT and LoRaWAN is not

supported.

The following measured values or data are transmitted:

Activated

Deactivate

Communication

6 Operating modes, activate device

VEGAPULS Air 41 • Autarkic device with measured value transmission via radio technology

64808-EN-210216

•

Distance from the medium surface

•

Electronics temperature

•

Geographical position determined by GNSS

•

Installation position

•

Remaining life of Lithium cells

•

Device status

The geographical position is determined by an integrated GNSS

sensor via navigation satellites. It is optionally available with the LTE-

M/NB-IoTversionofthedeviceandcanbeswitchedon/oviathe

VEGA Tools app or PACTware/DTM.

If position determination is activated, it is carried out once after tilting

the device by 20°. If no satellite signal has been found and no position

determined after 180 s, the procedure is aborted.

Information:

If the sensor is tilted by more than 20°, the device goes into fault

mode; no more radar measurements are made.

Position determination

No position determination in LoRa mode

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Vega VEGAPULS Air 41 Operating instructions

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