Betriebsanleitung DKME/A-1 Modul ATEX, 3, en US · Betriebsanleitung DKME/A-1 Modul ATEX, 3, en_US Subject: DKME/A-1 Module ATEX Flow Monitor Keywords: COSIMA go! stylesheet derivat

DKME/A-1 Module ATEXFlow Monitor

Operation instructions

Flow monitor for usein explosion-hazard zones

Series DKME/A-1Type DKME/A-1/20 thru DKME/A-1/80

Read this manual prior to performing any task!

DKME/A-1 Modul ATEX, 3, en_US

© Meister Strömungstechnik GmbH 2019

Meister Strömungstechnik GmbH

Im Gewerbegebiet 2

63831 Wiesen

Germany

Telephone: +49 6096 9720 - 0

Fax: +49 6096 9720 - 30

E-mail: [email protected]

Internet: www.meister-flow.com

These instructions were compiled by:

Meister Strömungstechnik GmbH

Subject to change without notice

04.05.2020DKME/A-1 Module ATEX Flow Monitor2

These instructions facilitate the safeand efficient handling of a flow monitor(referred to as "device" in the fol-lowing). The instructions are an inte-gral part of the device and must bekept within easy reach for the per-sonnel in the immediate vicinity of thedevice at all times. Personnel mustcarefully read and understand theseinstructions before commencing allwork. The basic requirement for safework is adherence to all safety andhandling instructions stipulated inthese instructions. The local accident-prevention regulations and generalsafety standards and regulations forthe field of application of the devicealso apply. Illustrations in theseinstructions are provided to aid generalunderstanding and might deviate fromthe actual model. No claims can bederived from any such differences.

Limitations of liability

All details and instructions in thismanual have been compiled underconsideration of the valid standardsand regulations, the current state-of-technology and our many years ofknowledge and experience. The manu-facturer does not accept any liabilityarising from:

n non-observance of any details inthese instructions

n improper use of the device, or usethat is not in accordance withthese instructions

n use of non-trained personnel

n unauthorized retrofitting or tech-nical changes that have not beenauthorized by the manufacturer

n use of non-approved replacementparts

The duties and obligations agreedupon in the delivery contract apply infull, as well as the general terms andconditions, the terms of delivery by themanufacturer and the valid legal regu-lations applicable at the conclusion ofthe contract.

Copyright

These operating instructions are pro-tected by copyright.

Except for internal purposes, transferof these instructions to third-parties,copying them in any way– even in part – as well as dissemina-tion and/or communication of their con-tent is forbidden without prior writtenauthorization from Meister Strömung-stechnik ("manufacturer"). Violationsare subject to claims for indemnifica-tion. The manufacturer reserves theright to assert additional claims.

Copyright is the property of the manu-facturer.

© Meister Strömungstechnik GmbH

Im Gewerbegebiet 2

63831 Wiesen

Germany

Supplemental directives

04.05.2020 DKME/A-1 Module ATEX Flow Monitor 3

Table of contents1 Overview..................................................................................................... 6

1.1 Short description.................................................................................. 61.2 Warranty and guarantee provisions..................................................... 61.3 Customer service................................................................................. 6

2 Safety.......................................................................................................... 72.1 Explanation of symbols........................................................................ 72.2 Correct use in explosion-hazard zones............................................... 82.3 Special precautions for use in explosion-hazard zones.................... 102.3.1 Precautions for use in explosion-hazard zones.............................. 102.4 Personnel requirements.................................................................... 122.5 Personal safety equipment................................................................ 132.6 Protective systems............................................................................ 13

3 Areas of employment............................................................................... 143.1 Mechanical component (flow meter without limiting contacts and

electrical accessories)....................................................................... 143.1.1 Exterior of the device...................................................................... 143.1.2 Interior of the device....................................................................... 143.1.3 General safety information for the mechanical component of the

device............................................................................................. 153.1.4 Categorization of the mechanical component of the flow monitor.. 163.1.5 List of media................................................................................... 193.1.6 Applicable documents.................................................................... 213.2 Electrical component of the device (limiting contacts)....................... 243.2.1 Categorization of the electrical component of the flow monitor

(limit switch contacts)..................................................................... 243.2.2 Applicable documents.................................................................... 24

4 Operating data.......................................................................................... 344.1 Operating data for the mechanical component of the device............ 344.2 Switch contact operating data........................................................... 34

5 Transport, packaging and storage......................................................... 36

Table of contents


6 Installation and initial startup................................................................. 376.1 Safety................................................................................................ 376.2 Tools.................................................................................................. 376.3 Protection of the flow monitor............................................................ 376.4 Electrical connection.......................................................................... 376.5 Grounding the device........................................................................ 376.6 Contact protection measures............................................................. 37

7 Operation.................................................................................................. 39

8 Troubleshooting....................................................................................... 40

9 Maintenance............................................................................................. 419.1 Return Materials................................................................................ 419.1.1 Return Materials Authorization....................................................... 41

10 Disassembly and disposal...................................................................... 42

11 Technical data.......................................................................................... 4311.1 Dimension sheet.............................................................................. 4311.2 General specifications...................................................................... 4411.3 Replacement parts........................................................................... 45

12 Annex........................................................................................................ 48

13 Index.......................................................................................................... 49

Table of contents


1 Overview1.1 Short description

Fig. 1: DKME/A-1 flow monitor

1 Switchpoint adjustment scale2 Explosion-proof switch contact

with cast-on power cable3 Mechanical display with indicator

scale and pointer

The flow monitor DKME/A-1 monitorsthe continuous flow of liquids. It isdesigned for installation into pipe sys-tems.

A float inside the device is moved bythe medium flowing through it. Thedesired switch point can be set on theswitchpoint adjustment scale, wherebythe arrow on the switch contact isaligned to the desired volume flowvalue on the adjustment scale. Theactual flow value is shown by thepointer on the indicator scale.

Electrical monitoring is accomplishedby explosion-proof limit switch con-tacts. The electrical connection is viathe cast on power cable.

1.2 Warranty and guar-antee provisions

Warranty and guarantee provisions arecontained in the general terms andconditions of the manufacturer.

1.3 Customer serviceFor technical information, please con-tact our customer service department(for contact details, see Page 2).

Furthermore, our staff is always inter-ested in receiving new information andexperiences gained from application ofthe device, which might be useful inimproving our products.

Overview

Customer service


2 SafetyThis Chapter provides an overview ofimportant safety aspects required foroptimum protection of personnel aswell as for safe installation and safeoperation of the device.

Non-observance of the handling andsafety instructions listed in this manualmay result in hazardous/dangerous sit-uations and in damage to property.

2.1 Explanation of sym-bols

Safety instructions

Safety instructions in this manual aremarked by symbols. The safetyinstructions are preceded by signalwords that indicate the level of danger/hazard.

To prevent accidents or injuries to per-sons as well as damage to property,always observe the safety instructionsand proceed carefully.

DANGER!

This combination of symbol andsignal word indicates an imme-diate, dangerous situation thatresults in death or serious injuryif it is not avoided.

WARNING!

This combination of symbol andsignal word indicates a possiblydangerous situation that mightresult in death or serious inju-ries if it is not avoided.

Safety

Explanation of symbols


CAUTION!

This combination of symbol andsignal word indicates a possiblydangerous situation that mightresult in minor or slight injuriesif it is not avoided.

NOTICE!

This combination of symbol andsignal word indicates a possiblydangerous situation that mightresult in damage to propertyand to the environment if it isnot avoided.

Tips and recommendations

This symbol emphasizes usefultips and recommendations aswell as information for efficientand failure-free operation.

Signs used in these instructions

The following symbols and highlightingare used in these instructions to iden-tify handling instructions, the descrip-tion of results, lists/enumerations, ref-erences and other elements:

Designates step-by-step han-dling instructions.

ð Designates a state or anautomatic sequence as aresult of a specific operatingstep.

n Designates randomly ordered enu-merations and list entries

Ä “Signs used in these instructions”on page 8, designates references tochapters in these instructions.

2.2 Correct use inexplosion-hazardzones

The device is designed and con-structed exclusively for the correct usein accordance with these instructions.

The flow monitor serves exclusively formonitoring the continuous flow of liq-uids.

The areas of application are specifiedin Chapter 3 of these instructions.

The admissible operating conditionsare specified in Chapter 4 of theseinstructions.

Safety

Correct use in explosion-hazard zones


Correct use of the device includes theobservance of all specifications in theOperating Instructions for "DKME/A-1Module BASICS" and "DKME/A-1Module ATEX".

Any addition or different application,above and beyond the correct use inaccordance with these instructions, isdeemed as incorrect use.

WARNING!

Danger due to incorrect use!– Use the flow monitor only

within the stipulated per-formance limits

– Do not subject the flowmonitor to severe tempera-ture fluctuations

– Do not use the flow monitorwith quick-acting valves

– Do not use the flow monitorwith solenoid valves

– Do not subject the flowmonitor to vibrations

– Do not subject the flowmonitor to pressure surges

– Do not use the flow monitorwith media containingsolids or abrasives

– Only use the flow monitorwith media previouslyapproved by the manufac-turer

– Do not use the flow monitoras the sole monitoringdevice to prevent dan-gerous conditions

– Do not install the flow mon-itor as a load bearing partwithin a pipeline system

– The flow monitor must beinstalled so, as to precludedamage by outside force. Ifnecessary, install an appro-priate impact protectiondevice

Safety

Correct use in explosion-hazard zones


– The flow monitor may beinstalled in explosion-hazard zones only if:– the labeling on the flow

monitor,– the labeling on the

switch unit installed onthe flow monitor,

– and the informationcontained in theaccompanying docu-mentation (OperatingInstructions"DKME/A-1 ModuleBASICS" and"DKME/A-1 ModuleATEX"), authorize suchinstallation and opera-tion

– Planning and design ofequipment, protective sys-tems and components isthe responsibility of thefacility operator

– The facility operator mustconsider the possibleeffects in case of an explo-sion

– The facility operator isresponsible for the substi-tution, or the reduction ofthe quantity of substances,which may cause an explo-sive atmosphere

All claims for damages due to incorrectuse are excluded.

Incorrect use of the flow monitor mayresult in dangerous situations.

2.3 Special precautionsfor use in explosion-hazard zones

The following chapter lists residualrisks that might arise from the device.

To reduce health risks and preventdangerous situations, observe thesafety instructions listed here, thesafety instructions listed in other chap-ters of these Operating Instructions, aswell as all safety instructions listed inthe Operating Instructions for"DKME/A-1 Module BASICS".

These Operating Instructionscannot cover all conceivabledangers because many dan-gers arise, not from the deviceitself, but from the respectivemedia flowing through it.Always observe the instructionson the appropriate safety datasheets when using hazardousmedia!

2.3.1 Precautions for usein explosion-hazardzones

Safety

Special precautions for use in explosion-hazard zones > Precautions for use in explosion-hazard zones


DANGER!

Danger to life from explo-sions– Potentially explosive dust-

air mixtures and hybrid mix-tures are not permittedinside the flow meter/flowmonitor and must beexcluded by the operator!

– Dust accumulations are notpermitted inside the flowmeter/flow monitor or onthe outside surface andmust be excluded by theoperator! When cleaning,do not use dry cloths!

– To avoid electrostaticcharges capable ofresulting in dangerous sit-uations, the followingrequirements must be met:– All conductive parts,

capable of electrostaticcharging, must be con-nected and grounded.

– Dangerous electro-static charging of non-conductive parts andmaterials, includingsolids, fluids and dust,must be avoided.

– Ignitable dischargesmust be excluded.

– Chemical reactions, pyrol-ysis or biological processesinside the flow meter/flowmonitor are not permittedand must be excluded bythe operator.

– Intrusion of foreign mate-rials which can generatesparks, is not permitted andmust be excluded by theoperator.

– Friction, which may causelocal heat build-up andsparking, is not permittedand must be excluded bythe operator!

– Impact processes, involvingmaterials such as rust orlight alloys (e.g. aluminumor magnesium) are not per-mitted and must beexcluded by the operator.

– High voltage and currentsthat may cause sparkingare not permitted and mustbe excluded by the oper-ator.

– Electromagnetic waves in afrequency range between104 to 3×1012 Hz, as maybe found in the vicinity ofradio broadcasting stationsor high-frequency genera-tors, are not permitted andmust be excluded by theoperator.

– Electromagnetic waves in afrequency range between3×1011 to 3×1015 Hz, whichcan occur as radiation fromprotective systems or com-ponents (e.g. lamps, arclamps, lasers), are not per-mitted and must beexcluded by the operator.

Safety

Special precautions for use in explosion-hazard zones > Precautions for use in explosion-hazard zones


– Devices which can focusradiation, and which canprovide an ignition sourcefor particles and surfaces,are not permitted and mustbe excluded by the oper-ator.

– Ionizing radiation, whichexceeds the minimum igni-tion temperature of the sur-rounding combustibleatmosphere, is not per-mitted and must beexcluded by the operator.

– Ultrasonic sources, whichcan ignite the sonicatedmaterial, are not permittedand must be excluded bythe operator.

– Adiabatic compression andshock waves are not per-mitted and must beexcluded by the operator.

– Exothermic reactions,including auto-ignition ofdust, is not permitted andmust be excluded by theoperator.

2.4 Personnel require-ments

WARNING!

Risk of injury due to insuffi-ciently trained and qualifiedpersonnel!If unqualified personnel work onthe device or are located withinits hazard zone, dangers arisewhich may result in serious inju-ries and considerable damageto property.

– All work must be performedby qualified personnel only

– Keep unqualified personnelaway from hazard zones

The personnel requirements, as formu-lated in the Operating Instructions for"DKME/A-1 Module BASICS" Chapter2.4, are valid. For employment withinexplosion-hazard zones, only trainedand qualified personnel may be used.Responsibility for the choice of per-sonnel and their qualification rests withthe facility operator. The requirementsfor standards DIN EN 60079-14 andDIN EN 60079-17 must be taken intoconsideration.

Refer also to the Operating Instruc-tions "DKME/A-1 Module BASICS",Chapter 2.9 "Responsibility of theowner".

Authorized personnel is to berestricted to those persons who can beexpected to carry out their work reli-ably. Persons whose ability to respondis influenced, e.g. by drugs, alcohol ormedication, are not authorized.

Safety

Personnel requirements


Observe the age and occupational reg-ulations at the site when choosing per-sonnel.

2.5 Personal safetyequipment

Personal safety equipment is used toprotect personnel from hazards/dangers that might impair their safetyor health during work.

When performing the various tasks at,and with the device, personnel mustwear personal safety equipment. Spe-cial reference to this equipment ismade in the Operating Instructions for"DKME/A-1 Module BASICS". Thefacility operator must ensure that theprotective clothing used in explosion-hazard zone is suitable and approved.

2.6 Protective systemsThe design of the safety features isdescribed in the Operating Instructions"DKME/A-1 Module BASICS". Theoperator must ensure that all appli-cable regulations which apply to oper-ation in an explosion-hazard zone aremet.

Safety

Protective systems


3 Areas of employment3.1 Mechanical compo-

nent (flow meterwithout limiting con-tacts and electricalaccessories)

3.1.1 Exterior of thedevice

n Devices of the DKME/A-1 typemay be employed in areas inwhich an explosive atmosphere,composed of a gas/air- or dust/air-mixture, may occasionally occur.The exterior of the device maytherefore be suitably located inexplosion hazard zone 1, zone 2,zone 21, or zone 22.

n Dust accumulations are not per-mitted; neither internally, nor onthe outside surface of the flowmeter/flow monitor and must beexcluded by the operator.

3.1.2 Interior of the devicen Internal to the device, only those

flow media may be used, to whichthe following applies:

n the media is listed on the medialist (Chapter 3.1.5)

n the medium is not aggressive tothe wetted parts of the device, and

n the device is approved b the man-ufacturer for use with the medium.

n It is permissible to occasionallyhave an explosive gas/air mixtureinside the device (explosionhazard zone 1). At no time maygasses of explosion hazard groupIIC (e.g. hydrogen or acetylene)be present in the interior of thedevice.

n Explosive dust-air mixtures andhybrid mixtures are not permittedinside the flow meter/flow monitorand must be excluded by the oper-ator.

n Chemical reactions, pyrolysis orbiological processes inside theflow meter/flow monitor are notpermitted and must be excludedby the operator.

n The entry of foreign materials thatmay produce sparks is not per-mitted and must be excluded b theoperator.

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > Interior of the device


3.1.3 General safety infor-mation for themechanical compo-nent of the device

n Dust accumulation are not per-mitted; neither internally, nor onthe outside surface of the flowmeter/flow monitor and must beexcluded by the operator. Whencleaning, do not use dry cloths!

n In case of hazard through staticelectricity, the following require-ments must be met:– All conductive parts capable

of charging themselves elec-trostatically must be con-nected and grounded.

– Dangerous electrostaticcharging of non-conductiveparts and materials, includingsolids, fluids and dust, mustbe avoided.

– Ignitable discharges must beexcluded.

n Friction, which may cause localheat build-up and sparking, is notpermitted and must be excludedby the operator.

n Impact processes involving mate-rials such as rust or light alloys(e.g. aluminum or magnesium) arenot permitted and must beexcluded by the operator.

n High voltage and currents thatmay cause sparking are not per-mitted and must be excluded bythe operator.

n Electromagnetic waves in a fre-quency range between 104 to3×1012 Hz, as may be found in thevicinity of radio broadcasting sta-tions, or high-frequency genera-tors, are not permitted and mustbe excluded by the operator.

n Electromagnetic waves in a fre-quency range between 3×1011 to3×1015 Hz, which can occur asradiation from protective systemsor components (e.g. lamps, arclamps, lasers), are not permittedand must be excluded by the oper-ator.

n Devices which can focus radiation,and which can provide an ignitionsource for particles and surfaces,are not permitted and must beexcluded by the operator.

n Ionizing radiation, which exceedsthe minimum ignition temperatureof the surrounding combustibleatmosphere, is not permitted andmust be excluded b the operator.

n Ultrasonic sources, which canignite the sonicated material, arenot permitted and must beexcluded by the operator.

n Adiabatic compression and shockwaves are not permitted and mustbe excluded by the operator.

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > General safety information for the mechanical component

of the device


n Exothermic reactions, includingauto-ignition of dust, are not per-mitted and must be excluded bythe operator.

n The device must be installed insuch a way as to precludedamage by outside force. It is theresponsibility of the operator toinstall appropriate protectivedevices.

3.1.4 Categorization ofthe mechanical com-ponent of the flowmonitor

n Equipment groupinternal: IIexternal: II

n Equipment categoryinternal: 2external: 2

n Atmosphereinternal: Gas (G)external: Gas (G), Dust (D)

n Type of protection: h (Construc-tional Safety "c")

n Gas groupinternal: IIBexternal: IIC, IIIC

n Temperature classinternal: T4, T5, T6external: T4, T5, T6external: T135 °C, T100 °C, T80°COperating temperatures for devicewithout limit switch contactsThe maximum media tempera-ture for a device without limitswitch contacts must be lessthan:– the ignition temperature of the

medium and– the ignition temperature of the

atmosphere surrounding thedevice and

– less than or equal to 120 °C

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > Categorization of the mechanical component of the flow

monitor


It is the responsibility of the oper-ator to ensure that these require-ments are met concurrently.The minimum media tempera-ture for a device without limitswitch contacts must be higherthan or equal to - 20 °C.It must be ensured that themedium does not freeze.The maximum ambient tempera-ture for a device without limitswitch contacts must be lessthan:– the ignition temperature of the


atmosphere surrounding thedevice

– and less than or equal to120 °C

It is the responsibility of the oper-ator to ensure that these require-ments are met concurrentlyThe minimum ambient tempera-ture for a device without limitswitch contacts must be higherthan or equal to - 20 °COperating temperatures for adevice with the following limitswitch contacts:Explosion proof switch contactswith design examination:PTB 03 ATEX 2154 X

II 2 G Ex mb IIC T6 GbII 2 D Ex tb IIIC T80 °C Db

The maximum media tempera-ture for a device with these limitswitch contacts must be lessthan:

– the ignition temperature of themedium and

– the ignition temperature of theatmosphere surrounding thedevice and


It is the responsibility of the oper-ator to ensure that these require-ments are met concurrentlyThe minimum media tempera-ture for a device with these limitswitch contacts must be higherthan or equal to - 20 °C.It must be ensured that themedium does not freezeThe maximum ambient tempera-ture for a device with these limitswitch contacts must be lessthan:– the ignition temperature of the




It is the responsibility of the oper-ator to ensure that these require-ments are met concurrently.The minimum ambient tempera-ture for a device with these limitswitch contacts must be higherthan or equal to - 20 °COperating temperatures for adevice with the following limitswitch contacts:Explosion proof switch contactswith design examination:PTB 03 ATEX 2154 X

II 2 G Ex mb IIC T5 Gb

Areas of employment


monitor


II 2 D Ex tb IIIC T100 °C DbThe maximum media tempera-ture for a device with these limitswitch contacts must be lessthan:– the ignition temperature of the




It is the responsibility of the oper-ator to ensure that these require-ments are met concurrentlyThe minimum media tempera-ture for a device with these limitswitch contacts must be higherthan or equal to - 20 °C.It must be ensured that themedium does not freezeThe maximum ambient tempera-ture for a device with these limitswitch contacts must be lessthan:– the ignition temperature of the




It is the responsibility of the oper-ator to ensure that these require-ments are met concurrentlyThe minimum ambient tempera-ture for a device with these limitswitch contacts must be higherthan or equal to - 20 °C

n EPL (Equipment Protection Level):Gb (Gas), Db (Dust)

n Labeling of the mechanical com-ponent of the flow meter/monitor:internal: II 2G Ex h IIB T4, T5,T6external: II 2G Ex h IIC T4, T5,T6external: II 2D Ex h IIIC T135°C, T100 °C, T80 °C Db

Areas of employment


monitor


3.1.5 List of mediaMedia used Ignition temp. Explosion limit

[%]

Lower Upper

Argon Inert gas

Cargon gaseous mixtureArgon+CO2

CO2 Inert gas

CO2liquid

Diesel 255 (ASTME659-78) 0,6 6,5

Biodiesel SME Soya seed oilmethyl ester

285 (ASTME659-78)

Biodiesel RME Rape seed oilmethyl ester

283 (ASTME659-78)

EDC (1,2-Dichlorethane) 440 6,2 16

Natural gas 575 - 640 4 17

Ethanol 400 3,1

City gas 560

Gaseous mix-ture 90 %Argon + 10 %CO2

Gaseous mix-ture 96 %Argon + 4 %O2

Helium none none none

Air

Methane 595 4,4 16,5

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > List of media


Media used Ignition temp. Explosion limit[%]

Lower Upper

Methanol 455 6,1 44

N2 none none none

N2O none none none

NaOH Natrium-hydroxide-NaOH ("causticsoda")

none none none

NaOH 50% none none none

Caustic sodaNaOH 25%

none none none

NH3 anhydrousammonia

630 15 28

n-Heptan(highly puri-fied)

215 1 6,7

O2 none none none

Oil

organic Saltsolution den-sity 1,35 kg/l20 °C

Peroxide none none none

RAF2 Raffinate 2 385 1,6 10

Spirits ofAmmonia(25%)

630 15 28

SO2 Sulphur dioxide none none none

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > List of media


Media used Ignition temp. Explosion limit[%]

Lower Upper

Solvana 2000(Universalcleaningagent)

236 0,4 7

Petroleumether

>200 0,6 7

Water none none none

Water / Nitrite-solution

Hydrogenper-oxyde 50%(ultra pure)

none none none

Hydrogenper-oxyde 50weight.-%, dis-solved inWater

none none none

Propane 470 2,2 9,5

n-Butane 365 1,4 8,5

3.1.6 Applicable docu-ments

Areas of employment

Mechanical component (flow meter without limiting contacts and electrical accessories) > Applicable documents


Areas of employment



.

Areas of employment



3.2 Electrical compo-nent of the device(limiting contacts)

The electrical limiting contacts weresubjected to design examination PTB03 ATEX 2154 X

The electrical limiting contacts, in com-bination with DKM/EA-1 type devices,may only be employed in areas inwhich an explosive atmosphere, com-posed of a gas/air- or dust/air- mixture,may occasionally occur. The limitingcontacts of the device may thereforebe suitably located in explosion hazardzone 1, zone 2, zone 21, or zone 22.Dust accumulations are not permittedon the limiting contacts and must beexcluded by the operator.

3.2.1 Categorization ofthe electrical com-ponent of the flowmonitor (limit switchcontacts)

n Device group: IIn Device category: 2n Atmosphere: Gas (G), Dust (D)n Gas group: IIC, Dust group: IIICn Ignition protection class (Gas): mb

(Encapsulation, application inzone 1 and 2)

n Ignition protection category (Dust):tb (protection by enclosure, appli-cation in zone 21 and 22)

n Temperature class (Gas): T5, T6

n Maximum permissible surfacetemperature (Dust): T 80 °C,T 100 °C

n EPL (Equipment Protection Level):Gb (Gas), Db (Dust)

3.2.2 Applicable docu-ments

The electrical limiting contacts weresubjected to a design examination

PTB 03 ATEX 2154 X

The following documents must beobserved:

Manufacturer's declaration for theemployment of explosion-proof switchunits within a safety concept

n Design examination certificate withattachments

n Conformity declaration (MeisterStrömungstechnik GmbH)

n Operating Instructions for theswitch units

Areas of employment

Electrical component of the device (limiting contacts) > Applicable documents


Areas of employment



Areas of employment



Areas of employment



Areas of employment



Areas of employment



Release: 03.09.2018 Page 1 of 4

OPERATING INSTRUCTIONS Explosion-proof contacts according to ATEX 2154 X

Technical Safety Data Model

SEM-A (SPDT/Change Over) + SEM-E (SPST/Normally Open)

Manufacturer: Meister Strömungstechnik GmbH / Im Gewerbegebiet 2 / D-63831 Wiesen

EN 60079-0: 2018 / EN 60079-18:2015 / EN 60079-18/A1:2018 / EN 60079-31:2014 T6 T5

Typ SEM – A… CE 0102 max. ambient temperature 75 °C Typ SEM – A… CE 0102 max. ambient temperature 90 °C

II 2G Ex mb IIC T6 Gb + II 2D Ex tb IIIC T80 Db II 2G Ex mb IIC T5 Gb + II 2D Ex tb IIIC T100 Db

Typ SEM – E… CE 0102 max. ambient temperature 75 °C Typ SEM – E… CE 0102 max. ambient temperature 90 °C

II 2G Ex mb IIC T6 Gb + II 2D Ex tb IIIC T80 Db II 2G Ex mb IIC T5 Gb + II 2D Ex tb IIIC T100 Db

Approval: EX-Type Examination Certificate PTB 03 ATEX 2154 X

Startup

The switch unit may only be connected to circuits with the following maximum ratings:

SEM-A: Umax: 250 V / Imax: 1 A / Pmax: 30 W

SEM-E: Umax: 250 V / Imax: 2 A / Pmax: 60 W

The circuit must not incorporate any effective inductivities or effective capacities. Above mentioned max. ratings must never be exceeded. For contact protection a fuse with the nominal value

of 1 A for SEM-A respectively 2 A for SEM-E

must be provided outside of the hazardous area for the circuit, unless the switch unit is connected to an intrinsically safe circuit. Application The switch unit may be used in potentially explosive atmospheres classified as Category 2.

Mounting The switch unit must be inserted between the mounting rails and then tightened with 2 screws.

Areas of employment




Maintenance There is no maintenance required. Repairs are not permitted! Installation The electrical connections must be made in accordance to local safety regulations for electrical equipment and under observance of the regulations for the installation of electrical equipment in hazardous areas. The connection circuits must be designed with increased safety, if the device is not connected to intrinsically safe circuits. Adjustment Except for the switch point, no other adjustments have to be made. Relevant safety data The following limit must not, under any circumstances, be exceeded, even for a very short time. The following limit values must never be exceeded, even for short periods.

Type SEM-A (T5) SEM-E (T5) SEM-A (T6) SEM-E (T6) Operating voltage max. 250 V max. 250 V max. 250 V max. 250 V Switch current max. 1 A max. 2 A max. 1 A max. 2 A Contact Rating max. 30 W max. 60 W max. 30 W max. 60 W Max. ambient temperature

90 °C 90 °C 75 °C 75 °C

The unit must not be used in areas where electrostatic charging of the plastic housing might occur.

Areas of employment




Warning Do not clean the switch unit with aggressive cleaning agents or solvents, nor store or install the unit in aggressive atmosphere to avoid damage to the employed plastics. Cleaning must not take place in potentially explosive areas. Ensure that the plastic housing is not electrostatically charged during cleaning. If this cannot be ensured, the housing must be discharged on all sides, outside the potentially explosive area, by means of a grounded metal plate before bringing the unit back into the potentially explosive area. In explosive areas, the plastic housing must under no circumstances be exposed to handling or processes which can lead to electrostatic charging of the housing. When removing the flowmeter and switch unit from the process line, ensure that no flow medium comes in contact with the switch housing and/or connecting cable. The sensor side of the switch unit (opposite the cable entry) is fragile due to its function and must be protected against mechanical damages when removed from the flow meter. The switch unit must be installed so that the connecting cable is not pinched, chafed or otherwise damaged and must not come in contact with parts which exceed temperatures of 75 °C (at T6) or 90 °C (at T5). The mounting of the switch unit onto flowmeters installed into a process line subjected to severe vibrations must be avoided, as this may cause malfunctions, such as loosening of the fixing screws, inexact measured values or cable failure. The switch unit must not be employed in machinery, plants or medical apparatus in which, should a malfunction arise, persons, animals or property could be injured or damaged.

Areas of employment




Function test Warning The function test must be conducted outside the potentially explosive area. SEM-A: The function test is performed with a cable tester and a magnet. If measured between core 1 and 2 of the connecting cable, the cable tester must switch from “conductive” to “nonconductive” when the magnet is in approximation to the front side of the switch unit. If measured between core 1 and 3 of the connecting cable the action of the cable tester must be reversed. The dielectric resistance between the electrical connections and the housing must be > 10 MΩ.

Connection: Core No. 1 Common Core No. 2 Normally closed Core No. 3 Normally open

SEM-E: The function test is performed with a cable tester and a magnet. If the magnet is in approximation of the front side of the switch unit the cable tester must indicate “conductive” when the switch is triggered. The dielectric resistance between the electrical connections and the housing must be > 10 MΩ.

Connection: in any order

Safety recommendation The explosion proof safety can be increased when the switch unit is connected to an intrinsically safe circuit e. g. using a galvanic isolator with an intrinsically safe input circuit. The galvanic isolator must be mounted in the safe area. Wiesen, 3 September 2018

.

Areas of employment



4 Operating dataOperating data for employment inexplosion-hazard zones.

4.1 Operating data forthe mechanicalcomponent of thedevice

The maximum operating pressure isspecified in the Operating Instructionsfor "DKME/A-1 Module BASICS".

The maximum media and ambienttemperatures for the mechanical com-ponent depends on various factors. Itis the responsibility of the operator tospecify the maximum temperatureswithin the framework set by the guide-lines in Chapter Ä Chapter 3.1.4 “Cat-egorization of the mechanical compo-nent of the flow monitor” on page 16

4.2 Switch contactoperating data

Operating data for the explosion-proofswitch unit with design examinationcertificate(PTB 03 ATEX 2154 X).

The following limit values must not beexceeded, not even for brief periods:

Table 1: Normally Open Contact(NOC), SEM-E (T6)

Max. operatingvoltage

250 V

Max. switch cur-rent

2 A

Max. switchingcapacity

60 VA

Max. ambienttemp for switchcontact

75 °C

Table 2: Normally Open Contact(NOC), SEM-E (T5)


250 V


2 A


60 VA


90 °C

Operating data

Switch contact operating data


Table 3: Change-Over Contact, SEM-A(T6)


250 V


1 A


30 VA

Minimum load 3 VA


75 °C

Table 4: Change-Over Contact, SEM-A(T5)


250 V

Max. switchingcurrent

1 A

Max. switchcapacity

30 VA

Minimum load 3 VA


90 °C

Operating data

Switch contact operating data


5 Transport, packaging and storageTransport, packaging and storage innon-explosion-hazard zones aredescribed in Chapter 4, "DKME/A-1Module BASICS".

In explosion-hazard zones, in additionto the requirements described in theabove reference, all valid provisionsfor safety, accident prevention andenvironmental protection must be com-plied with.

Packaging procedures (wrapping/unwrapping) may only be conductedoutside the explosion-hazard zone.

DANGER!

Danger to life if packagingprocedures are conducted inexplosion-hazard zones.

n Packaging procedures may onlybe conducted outside the explo-sion-hazard zone.

Transport, packaging and storage


6 Installation and initial startupInstallation and initial startup in non-explosion-hazard zones are describedin Chapter 5, "DKME/A-1 ModuleBASICS". In addition, for installationand initial startup in explosion-hazardzones, the following sections must beobserved:

6.1 SafetyAll relevant safety-, accident preven-tion- and environmental protection reg-ulations must be followed for employ-ment in an explosion hazard zone.

6.2 ToolsTools, which may cause sparks, arenot to be employed. These tools mayonly be used when there is no poten-tially explosive atmosphere present.

The use of steel tools, of any kind, isprohibited in hazard zone 1, if there isrisk of explosion due to substances inexplosion hazard group IIC (in accord-ance with IEC/TR3 60079-20), (forexample, acetylene, hydrogen).

6.3 Protection of theflow monitor

The flow monitor must be installed insuch a way as to preclude damage byoutside force.

The facility operator is responsible forthe installation of an appropriateimpact protection shield.

6.4 Electrical connec-tion

Electrical connection is accomplishedthrough the cast on power cableleading from the switch housing. Allsafety advisories contained in theOperating Instructions for "DKME/A-1Module BASICS", Chapter 5, must beobserved. Additionally, for operation inexplosion-hazard zones, all valid provi-sions for safety, accident preventionand environmental protection must becomplied with.

6.5 Grounding thedevice

When installing the device in a pipesystem, ensure that the device isgrounded to the pipe system to avoid adangerous electrical potential differ-ence.

6.6 Contact protectionmeasures

Recommendations for contact protec-tion measures, when the device isemployed in a non-explosion-hazardzone, are described in chapter 5.9"Contact protection measures" of theOperating Instructions for "DKME/A-1Module BASICS". When the device isemployed in an explosion-hazardzone, only those contact protectionmeasures may be taken, which are

Installation and initial startup

Contact protection measures


consistent with all valid safety andaccident prevention measures forexplosion-hazard zones and the speci-fications contained in these OperatingInstructions

Installation and initial startup

Contact protection measures


7 OperationOperation is described in Chapter 6,"DKME/A-1 Module BASICS". Allsafety- and hazard warnings containedin Chapter 6, "DKME/A-1 ModuleBASICS", must be followed. For opera-tion in explosion-hazard zones, allvalid provisions for safety, accidentprevention and environmental protec-tion must be complied with.

Operation


8 TroubleshootingThe procedures in case of malfunctionare described in Chapter 7,"DKME/A-1 Module BASICS". Allsafety- and hazard warnings, con-tained in Chapter 7, "DKME/A-1Module BASICS", must be followed.Additionally, for operation in explosion-hazard zones, all valid provisions forsafety, accident prevention and envi-ronmental protection must be compliedwith.

Troubleshooting


9 MaintenanceMaintenance procedures aredescribed in Chapter 8, "DKME/A-1Module BASICS". All safety- andhazard warnings, contained in Chapter8, "DKME/A-1 Module BASICS", mustbe followed. For operation in explo-sion-hazard zones, all valid provisionsfor safety, accident prevention andenvironmental protection must be com-plied with. Maintenance proceduresmay only be performed outside theexplosion-hazard zone.

DANGER!

Danger to life if maintenanceprocedures are performed inthe explosion-hazard zone– Maintenance procedures

may only be performed out-side the explosion-hazardzone

9.1 Return Materials9.1.1 Return Materials

AuthorizationFor products being returned, regard-less of the reason, the currently validprovisions of the returns policy set byMEISTER will apply. Return shipmentswhich do not comply with the returnspolicy may be refused by MEISTER atthe expense of the consignor.

Maintenance

Return Materials > Return Materials Authorization


10 Disassembly and disposalDisassembly and disposal proceduresare described in Chapter 9,"DKME/A-1 Module BASICS". Allsafety- and hazard warnings, con-tained in Chapter 9, "DKME/A-1Module BASICS", must be followed.For operation in explosion-hazardzones, all valid provisions for safety,accident prevention and environmentalprotection must be complied with. Dis-assembly of the device may only beperformed outside the explosion-hazard zone.

DANGER!

Danger to life if disassemblyprocedures are performed inthe explosion- hazard zone– Disassembly may only be

performed outside theexplosion hazard zone

– Disassembly in an explo-sion hazard zone may onlybe performed if there is norisk from an explosiveatmosphere

Disassembly and disposal


11 Technical data11.1 Dimension sheet

Technical data

Dimension sheet


11.2 General specificationsType Overall dimensions (mm)

G DN SW L1 L2 T

DKME/A-1/20

1/2" 15 34 130 152 14

3/4" 20 34 130 152 15

1" 25 40 130 130 17

DKME/A-1/40

1/2" 15 34 130 152 14

3/4" 20 34 130 152 15

1" 25 40 130 130 17

DKME/A-1/50

3/4" 20 34 130 152 15

1" 25 40 130 130 17

DKME/A-1/60

3/4" 20 34 130 152 15

1" 25 40 130 130 17

DKME/A-1/70

1" 25 40 130 130 17

DKME/A-1/80

1" 25 40 130 130 17

Type Overall dimensions (mm)

G D1 D2 A1 A2 A3 A4 Weight(g)

DKME/A-1/20

1/2" 40 40 57 - - ca. 62 1500

3/4" 40 40 57 - - ca. 62 1425

1" 40 40 57 - - ca. 62 1340

DKME/A-1/40

1/2" 40 40 57 - - ca. 62 1160

Technical data

General specifications


Type Overall dimensions (mm)

G D1 D2 A1 A2 A3 A4 Weight(g)

3/4" 40 40 57 - - ca. 62 1500

1" 40 40 57 - - ca. 62 1425

DKME/A-1/50

3/4" 40 40 57 - - ca. 62 1340

1" 40 40 57 - - ca. 62 1160

DKME/A-1/60

3/4" 40 40 57 - - ca. 62 1425

1" 40 40 57 - - ca. 62 1340

DKME/A-1/70

1" 40 40 57 - - ca. 62 1160

DKME/A-1/80

1" 40 40 57 - - ca. 62 1425

* NPT thread on request

**Sealed-in cable weight 2m ca. 80g

11.3 Replacement partsThe following replacement parts drawing provides an example of the constructionof a DKME/A-1 ATEX type flow monitor. The actual configuration may varydepending on the model.

Technical data

Replacement parts


Item No. ofpieces

Description

1 1 Process connection (inlet)

2 2 O-ring (seal)

3 1 Threaded ring (inlet)

4 1 Device body

5 1 Float

6 2 Magnet

7 1 Spring

Technical data

Replacement parts


Item No. ofpieces

Description

8 1 Threaded ring (outlet)

9 1 Process connection (outlet)

10 2 Guide rail

11 4 Fixing screw (guide rail)

12 1 Switch contact with cable

13 2 Washer

14 2 Fixing screw (switch contact)

15 1 Mechanical display

Technical data

Replacement parts


12 AnnexThe required tools are specified inChapter 11.3 "Tools" of the OperatingInstructions for "DKME/A-1 ModuleBASICS".

In explosion-hazard zones, tools whichmay cause sparks, are not to beemployed. These tools may only beemployed when there is no potentiallyexplosive atmosphere present.

The use of steel tools, of any kind, isprohibited in hazard zone 1, if there isa risk of explosion due to substancesin explosion hazard group IIC (inaccordance with IEC/TR3 60079-20),(for example, acetylene, hydrogen).

Annex


13 IndexAApplicable Documents . . . . . . . . . 24Atmosphere . . . . . . . . . . . . . . . . 24

CCategorization . . . . . . . . . . . . . . . 24

mechanical component . . . . . . 16

Contact . . . . . . . . . . . . . . . . . . . . 6Contact protection measures . . . . 37Copyright . . . . . . . . . . . . . . . . . . . 3Correct use . . . . . . . . . . . . . . . . . 8Customer service . . . . . . . . . . . . . 6

DDevice

Electrical component . . . . . . . . 24

exterior . . . . . . . . . . . . . . . . . 14

interior . . . . . . . . . . . . . . . . . 14

Device category . . . . . . . . . . . . . 24Device group . . . . . . . . . . . . . . . 24Disassembly . . . . . . . . . . . . . . . . 42disposal . . . . . . . . . . . . . . . . . . . 42

EElectrical connection . . . . . . . . . . 37employment . . . . . . . . . . . . . . . . . 8Environmental protection regula-tions . . . . . . . . . . . . . . . . . . . . . 37

FFlow monitor

protection . . . . . . . . . . . . . . . 37

GGeneral

safety . . . . . . . . . . . . . . . . . . . 7

Grounding . . . . . . . . . . . . . . . . . 37

IIgnition protection category . . . . . . 24Initial start-up . . . . . . . . . . . . . . . 37Installation . . . . . . . . . . . . . . . . . 37

LLimitation of liability . . . . . . . . . . . . 3Limiting contacts . . . . . . . . . . . . . 24List of media . . . . . . . . . . . . . . . . 19

MMaintenance . . . . . . . . . . . . . . . . 41

OOperating data


switch contact . . . . . . . . . . . . 34

Operation . . . . . . . . . . . . . . . . . . 39

PPackaging . . . . . . . . . . . . . . . . . 36Personnel

requirements . . . . . . . . . . . . . 12

Index


Precautionsexplosion . . . . . . . . . . . . . . . . 11

Protective Systems . . . . . . . . . . . 13

RReplacement parts . . . . . . . . . . . 45Return Materials Authorization . . . 41

SSafety equipment . . . . . . . . . . . . 13Safety information


Safety regulations . . . . . . . . . . . . 37Service . . . . . . . . . . . . . . . . . . . . 6Special precautions . . . . . . . . . . . 10Storage . . . . . . . . . . . . . . . . . . . 36

Symbols usedin the instructions . . . . . . . . . . . 7

TTechnical data

Dimension sheet . . . . . . . . . . 43

General specifications . . . . . . . 44

Temperature class . . . . . . . . . . . . 24Temperature class internal: T4,T5, T6, external: T4, T5, T6 . . . . . 18Tools . . . . . . . . . . . . . . . . . . 37, 48Transport . . . . . . . . . . . . . . . . . . 36Troubleshooting . . . . . . . . . . . . . 40

WWarranty and guarantee provisions 6

Index
