Meech 915EX User manual

Model 915EX
Shockless AC Bar
Operating
Manual

Contents
Introduction 3
Certication      3
Inspection 4
SpecialConditionsforSafeUse    4
Operation      5
Installation      6
TechnicalandConstruction    9
Maintenance      10
FaultFinding      11
RepairsandWarranty     14
CEApproval15
HealthandSafety15
Productsshowninthisdocumentmaybecoveredbyoneormorepatents,patentsappliedfor
and/orregistereddesignsand/ortrademarks.ForfurtherinformationpleaserefertoourHead
O󰀩ceorvisitwww.meech.com.
©MeechStaticEliminatorsLtd.,27.10.17

Introduction
TheMeechModel915EXhasbeendesignedforuseonthemostarduousstatic
eliminationproblems.Thespecialresistivecouplingofitsemitterpinsrendersthem
shockless,whilstgivingpowerfulstaticneutralisationperformance.Thisenablesthe
bartoeliminateveryhighstaticchargesonhighspeedwebsandatlongerrangesthan
haspreviouslybeenpossible.
Certication
ECtypeexaminationcerticateNo:
BASEEFA04ATEX0347X
3
Meech International Ltd
Witney, Oxon, OX290YN, UK
tel:[phone]; Fax:[phone]
e-mail:[email protected]; web:www.meech.com
915Ex
dims 77.5 x 18mm
Cool Gray 1
Gas group IIB, temp Class T6 (T85
O
C)
T amb -20 to +35
O
C. IP65
Model: 915Ex
1180
II 2 GD EEx m
Baseefa: 04ATEX0347X
Hyperion 915Ex
operating manual

Inspection
TheModel915EXBarwascarefullypackedatthefactory.Nevertheless,we
recommendcarefulexaminationofthecartonandcontentsforanydamage.Ifdamage
isevident,keepthepackingmaterialandimmediatelynotifythecarrierofapossible
damageclaim.Shippingclaimsmustbemadebytheconsigneetothedelivering
carrier.
SpecialConditionsforSafeUse
1. TheModel915EXmustbeusedinconjunctionwithaMeechType904power
supplyor904CMsystem.
2. Thepowersupplyshallbeprotectedbyafusecapableofwithstandinga
prospectiveshortcircuitcurrentof4000A
3. Theusermustdetermine,inconsultationwithMeech,thesuitabilityofthe
apparatusforusewithanysolventspresentattheapplication.
4. Whenusedindustyenvironments,theequipmentmaynotbeusedinassociation
withdustshavinganelectricalresistanceequaltoorlessthan103 Ohm
5. Whenusedindustenvironments,theequipmentmaybeusedonlywithdusts
 requiringanignitionenergyofgreaterthan0.2m.J.
6. Theusermustdetermine,inconsultationwiththemanufacturer,thesuitabilityof
 theapparatusforusewithparticularsolvents.
4

Operation
ThetypicalMeechModel915EXinstallationconsistsofoneormorebarsconnected
toaMeechModel904PowerUnit.
ThePowerUnitconvertstheelectricalsupplyintoahighvoltage,lowamperage
output.Thisoutputenergyistransferredtothe915EXbarbytheHTcable.
TheresistivelycoupledelectrodesareenergisedbytheACvoltagefromthePower
Unit.Theelectrodesemitthisenergy(coronadischarge)intheformofafieldof
ionisedair.Thisionisedairsuppliesionsofbothpolarities.
Electrostaticallychargedproductswhichpassthroughthiscoronaareimmediately
neutralisedandbecomestaticfree.
Undertestconditions,theMeechModel915EXhasbeenfoundtogivechargedecay
timesthatareuptoeighttimesfasterthanstandardACshocklesseliminatorbars. 5

6
Installation
The915EXBarcanbeplacedbetween25mmand150mmfromthesurfacetobe
neutralised.Itisimportanttoensurethatthesurfacetobeneutralisedhasfreeairon
bothsidesandthatearthedmetalobjectsare,wherepossible,atleast20mmaway
fromthebar.Theseprecautionswillmaximisetheunit’sionisationcapability.
Goodresultscanbeachievedatdistancesupto150mmbutasthedistancefromthe
objectincreases,thespeedofchargeneutralisationwilldecrease.
Atypicalinstallationdistanceis50mmfromthetargetsurface.Thisgivesexcellent
performanceathighweborproductspeeds,whilstavoidingpossibledamagefrom
webbreaksorproductmis-feeds.Veryfastwebsmayrequirethebartobeasclose
as25mmtotheweb.
Correctpositioningofthebar(s)isvitaltoefficientoperation.Thefollowingdiagrams
showthecorrectinstallationprocedures:
1.Theoptimaldistancefrommaterialtobeneutralised.

Mountingofthebarisby20mmM4studsmountedinatrackattherearofthebar.
Thesecanbeslidtoanypointalongthebar’slengthtomeetthemachine’savailable
fixingpoints.
Thechassisofthebariselectricallyconnectedtogroundonthepowerunitviathe
flexiblearmouredconduit.However,itisgoodpracticetoprovideasecondary
groundingthroughthefixingpointswherepractical.
TheHTcableandarmouredconduitrequireconnectiontoaMeechmodel904power
unit.Pleaseconsultthe904instructionmanualforfurtherinstruction.
NB:Meechmodel904powerunitisnotATEXratedandhencemustbemounted
outsidethehazardouszone.Forthisreasonastandard5mHTcableisprovidedbut
thiscanbeextendeduponrequest.
1. Freespaceisrequiredonoppositesidesofthetargetmaterial,notarollerorsolid
object.
7

8
2. Avoidproximitytoearthedpartsofmachineryasthiswilldistortthecoronaand
reduceitse󰀩ciency.
3. Ifbarsareneededonbothsidesofthematerial,theyshouldbe
staggered.
4. Thebarsmustbeearthedforcorrectoperation.Ifinanydoubtrunanearthwire
fromthebartotheearthstudonthePowerUnit.