ARCHIVES HISTORIQUES
DELACOMMISSION
COLLECTION RELIEE DES
DOCUMENTS "COM"
COM (73)597
Vol.1973/0121

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COMMISSION GFTHBEUS.OEBAN
COM(73)597 final
Brussels,18April1973
PROPOSAL FORACOUNCIL DIRECTIVE Oil
THEAPPROXIMATION OPTHELAWSOPTHEMEMBER STATES
RELATING TOCONTINUOUS TOTALISING WEIGHING MACHETES
(SubmittedtotheCouncil "bytheCommission )
COM(73)597final

EXPLANATORY MEMORANDUM
ThisDirective isadoptedpursuant tcArticle 1GOcftheTreatyin
conjunction withtheCouncilDirective of26July1971ontheapproximation
ofthelawscftheMemberStatesrelating tccommonprevisions forboth
measuringinstruments andmethedscfmetrclcgical control.*
ThepresentDirective aimsateliminating thetechnical barriers to
intra-Community tradeexistingatthepresenttimeinthesectorof .•.,
continuous totalising weighirgmachines onaccountcfthedisparity between
thenational lawsgoverning thesemachinesintheMemberStates.t;>
Acomparison oftheregulations applicable tothe6emachines inthe
various MemberStateshasshownthatthedifferences arenotlimitedonly
tothetechnical specifications relatingtctheconstruction andthe
conditions ofuse,butalsctothedegreecfprecision andfinallytothe.*
inspection procedures towhichthesemachines aresubjected beforetheyare
placedonthemarketendputintouse.
:Theeffectofthissituation ontradeisthatthemanufacturers have
tcdiversify theirproduction inordertccomplywiththeregulations in
forceineachMemberStateinwhichthesemachines areintended tobeused .
andhavet'6submittorepeated inspections carriedoutaccording tothe
different procedures .
Sincethepresentnational lawsaregrounded onthelegitimate desire
to-protecttheconsumer andtheuser,harmonization cftheselawsappearstc
betheonlywaytoeliminate theinconveniences resulting fromtheirdivergence
andtocreatetheConditions necessary fortheestablishment oftheCommon..
Market. '•
,......•-1 m-.
J.C.'(JournalOfficiel )OfficialJcurnaloftheEuropean Communities HoL202
cf6thSeptember 1971.

-2-
By"continuous totalising weighing machines "aremeant machines
which allrw automatic determination ofthecumulative weight cfanygiven
product which iscarried ontotheweighing machine bymeans cfaconveyor
belt .This totalising weighing machine iseither incorporated inapre­
existing belt orseparated from themain conveyor belt andconsists cfa
smaller conveyor belt ,which issupported completely byaplatfrrm scale
which acts asacontinuous totalising weighing machine .
Continuous totalising weighing machines areused above allin '
conveyor belt tackle forloading orunloading ships ,lorries andtrucks
orother means oftransport forgoods inbulk .These machines make it
possible todetermine thefull quantity ofsuch goods with sufficient
precision and inarelatively economic way ,without loss oftime and
without breaking theforward travel ofthematerials during transport on
theconveyor belt ,this transport being inanycase indispensable .
Continuous totalising weighing machines arealso used inplants
that mix andprocess various materials ,tomonitor theflow ofthematerials
tobemixed ,tokeep itconstant ,ortomodify itaccording tothe
manufacturing requirements .
»
Besides theindicators forthetotalised quantity transported ,the
continuous totalising weighing machines areasarule fitted with a
flowrate indicator (weight 'ofproduct transported perunit time ).Some .,
machines arealso 1fitted with other complementary devices ,forexample ,
aflow-regulating device . ;
Theinitial inspection ofcontinuous totalising weighing machines
iscarried out intwostages .Inthefirst stage ,thecontinuous totalising
weighing machine itself (inthecase ofweighing machines incorporated in
conveyor belts )istested "statically "bymeans cfstandard weights onthe .
premises ofthemanufacturer (partial inspection ).Inthis case the
conveyor belt travel hastobesimulated .Thesecond stage cftheinitial
•••/•••

»r
•3-
inspection iseffected attheplace where theconveyor belt assembly isto
beused ,with thematerial normally tcbetransported andwith theaidof
asufficiently large andappropriate control machine (weighbridge fcr
vehicles ,bunker scale ).
Since ccntinuous totalising weighing machines are inpractice
indispensable fcrthemeasuring cfrelatively large quantities cfmaterials
inbulk andtheir economic importance isgrowing with theever-increasing
automation ofproduction ,therequirements tcbemet atthetime cfthe
initial inspection must beuniformly established so -that thepresent
technical barriers totrade which result from thediffering national
provisions concerning construction andinspection ,canbeeliminated and
theinitial two-stage inspection canbeapplicable throughout theentire
Community with allthat this implies inregard tcrationalisation of
production ,scale economies ,andthecosts andformalities entailed bythe
different inspection procedures under thevarious national systems .
HARMONIZATION SOLUTION
Theharmonization method chosen istheso-called optional system ,on
thepattern ofthat adopted forthemajority cfthespecial Directives
concerning measuring instruments .Theoptional harmonization system is
allowed forthesame reasons asthetotal harmonization system bythe
Council Directive of26July 1971 relating tocommon provisions for
measuring instruments and fcrmetrclogical control methods .Aslong as
thebulk cfthenon-technical provisions ,notably onthesphere cfutilisation
andtcthecontrol dues relating tothecontinuous totalising weighing machines
have notbeen harmonized ,thetotal harmonization system would raise serious
problems .
Theoptional harmonization system means that ccntinuous totalising
weighing machines which meet therequirements cfthepresent Directive will
beable tobefreely marketed among andused intheMember States inthe
same way that machines which have satisfied thenational inspection
requirements cfanyoneoftheMember States canbemarketed andused in
that State .
•••/•9$

.*4-
CONSULTATION OFPARLIAMENT AND OFTHE ECONOMIC AND SOCIAL COMMITTEE
Under theterms cfTreaty Article 100(2 ),theopinion ofthese
twoauthorities isnecessary ,since implementation measures required by
theDirective entails ,forcertain Member States ,amendment cftheir
legal previsions .

ANNEXTOTHE
EXPLANATORY MEMORANDUM
LawsinfcrceintheMemberStatesrelating
tocontinuous totalising weighing machines
EELGIUM
I7o.:e
STore
GERMANY
-Lawonmetrology andinspection ofweights andmeasures !
(Le,.?oncalibration -Eichgesetz )cf11July1969.
-PTEHequireraents relativetrtheconstruction ofcontinuous totalising
weighing machines (Bauartanforderungcn anF'drderbandwa$<ai derPTB).
FRANCE
-Decreeof18June1956modified byDecreeof31August1971.
-Circular No.71.045.064.0 cf19April1971relating tocontinuous
totalising weighing machines .
IJjELAÎïD
ÏTone
'ITALY
-Actconsolidating thelawsonWeights andMeasures approved byRoyal
Decreeof23August1890Nc.7088andthesubsequent amendments thereto.
-Regulation of12June1902cnthemanufacture c-fweights,measures and
weighing andmeasuring instruments andsubsequent amendments thereto.
-DecreeofthePresident cftheRepublic,Nr.575of22June1954,which
admitstometrological controlautomatic machines intended forthe
weighing ofmaterials transported onacontinuously movingbelt.
-Ministerial decreesfollowing rntheabr-vementioned decreeofthe
President oftheRepublic concerning theadmission tometrclogical
control,attherequestofthemanufacturers ,cfspecialautomatic
machines intended fortheweighing ofmaterials transported ona
continuously movingbelt(patternapprove!).
LUXEMBOURG
Ncne.

THE NETHERLAN DS
-Lawonthetesting andinspection ofmeasuring instruments (ijkwet )1937 .
-Explicit requirements :theweighing machines used incommerce must be
inspected and stamped ,
-Regulations relating tcinspection cfmeasuring instruments (ijkreglement )
Other explicit requirements :affixing cfinspection marks ,obligations
ofapplicants forinspections .
-Orders relating tctheinspection ofmeasuring instruments (ijkbeschikking
Technical requirements .
Uptothepresent nospecial requirements exist forcontinuous totalising
weighing machines :they areautomatic weighing machines andthey must ,in
principle ,comply with theorders relating tothis type cfmachine .
MGIED KINGDOM
--Weights andMeasures Act1963
-Weights andMeasures Regulations 1963
SI1963 1710

PROPOSAL FOR ACOUNCIL DIRECTIVE
cntheapproximation cfthe laws oftheMember States
relating tccontinuous totalising weighing machines
(presented bytheCommission totheCouncil )
THECOUNCIL OFTHE EUROPEAN COMMUNITIES , . ^
Having regard tctheTreaty establishing theEuropean Economic Community
and inparticular Article 100thereof ;
Having regard tctheproposal from theCommission ;
Having regard tctheOpinion oftheEuropean Parliament ; '
Having regard totheOpinipn oftheEconomic andSocial Committee ;
Whereas intheMember States thedesign aswell astheprocedures for
„.1
inspection cfcontinuous totalising weighing machines aresubject tc
mandatory provisions which differ from oneMember State toanother and
consequently binder trade insuch .machines *whereas itis "therefore t
necessary .t-r..approximate these ^revisions ;
Whereas theCouncil Directive of26July1971^^,concerning the *approximation
ofthelaws oftheMember States relating tccommon provisions forboth'
measuring instruments andmethods ofmetro logical control has laid down the
EECpatera approval andEECinitial inspection procedures ;whereas ,in
accordance with that Directive ,itisappropriate tolaydown ,inregard to
continuous totalising weighing machines ,thetechnical requirements ,astc
design ,construction andoperation which these machines must satisfy inorder
tobeable tobefreely imported ,marketed andused after having passed the
required inspections andhaving beeri provided with therequired marks and
symbols ;
Whereas theaforesaid Directive also stipulates that theSpecial Directives
mayspecify ,when conditions sopermit ,thedate cnwhich each Member State
shall abrogate thenational provisions applicable tomachines similar tothose
which satisfy theCommunity provisions ;whereas inthis particular case ,itis
notyetpossible tofixthis date ;
HASADOPTED THIS DIRECTIVE :
OJNeL202 ,6September 1971 ,p.1. ••/•••

r2-
Article 1
Tnis Directive applies tccontinuous totalising weighing machines .These
machines are defined initem 1cftheAnnex ,
Article 2
Thecontinuous totalising weighing machines which mayreceive theEEC
marks andsymbols aredescribed intheAnnex .They shall besubject to
EECpattern approval andshall besubmitted tcEEC initial inspection .
Article 3
NoMember State mayrefuse ,prohibit orrestrict theplacing onthemarket
orentry into service ofcontinuous totalising weighing machines bearing
theEECpattern approval symbol andtheEEC initial inspection mark .
Article 4
1.Member States shall put into force the'laws ,regulations andadministrative
provisions needed inorder tocomply with this Directive within eighteen
months cfitsnotification and shall forthwith inform theCommission thereof .
2.Member States shall ensure that thetexts oftheprovisions ofnational
lawwhich they adopt inthefield covered bythis Directive arecommunicated
tcthe Commission .
Article 5
This Directive isaddressed tcthemember States . 1
Done atBrussels ,
For the Council
; ■The President

These provisions areapplicable tocontinuous totalising
weighing machines mounted onaconveyer belt using theaction ofgravity
cntheitem tobeweighed . -
■CHAPTER I ■
1-Définition
Continuous totalising weighing machines onconveyor belts aremachines
intended forthedetermination oftheweight ofabulk product ,without
systematic splitting up.themovement cfthebelt being uninterrupted .
2-Classification • -
2.1 -According tothemethod oftotalisation •'
2,1,1 -Operating byaddition : 1
• ... .Machines onwhich the .totalising device performs theaddition of
,successive .partial ,loads ,each ofthem' corresponding toadetermined
,,length oftravel ^cfthe -belt ,:,
2.1.2 -Operating byintegration :
Machines onwhich the'totalising device performs theintegration ,
,..with ,respect ;tctime ,cftheproduct *£the -'load perunit length
and thesp^ed ofthebelt . :
C
2.24Accrrdin ^tothetype oflead receptor . ,r, .
2.2.1 -Weighing table type : ,
■Machines thelead receiver (termed "weighing table "?)ofwhich
i;•lconstitutes cnly-a .part foftheconveyor .*
2.2.2 .-InccT^oratëd ccnveycr typé :
Machines the l^ad receiver cfwhich isconstituted bytheentire
... ,.j ,c,fnveye.r ..■ •
3-Constituent ,devices .<~i ' :;
3.1;-Principal devic es -..; -t.;.<■ '. ;v '•
3,1.1 -Conveyor belts
Part cfthemachine intended fottransporting theproduct by
means ofa;belt resting -onrevolving rollers ."*■'

-2-
3.1.1.1 -Carrying ro11ers
Cylinders bymeans ofwhich theconveyor belt issupported on
afixed ,frame . .. ;-
3.1.1.2 -Weighing rollers
Cylinders bymeans ofwhich theconveyor belt issupported cn
theload receiver cftheweighing unit .
3.1.2 -Weighing unit
All orpart cfanon-autcmatic weighing machine providing
information concerning theweight cfthe load tobemeasured .
3.1.3 -Belt travel transducer >
.Device feeding theconveyor andsupplying either discontinuous
information corresponding toagiven length cftravel ofthebelt ,
orcontinuous information inprcporticn tothespeed ofthebelt .
The part cfthis device inpermanent contact with thebelt is
termed "travel pick-up device ".
3.1.4 -Totalisation device
Device carrying outtheadding ofpartial loads ortheintegrating
oftheproduct oftheload perunit length bythespeed ofthebelt ,
from information supplied bytheweighing unit andthetravel
transducer .
3.1.5 -Totalisation indicating device
Device receiving information from :thetotalising device and
indicating theweight ofthelnads .transported .
These devices arecalled partial indicating devices when they are
fitted with adevice forre-setting tozero .
These devices arecalled complementary indicating devices when
they areintended togive results relative toafairly long
operational time andhave inconsequence ascale division far
greater than that cfthemain indicating device .
3.1.6 -Zero setting device
Device making possible azero totalisation over awhole number cf
revclutions oftheempty conveyor .
The zero setting device maybencn-automatic ,semi-autcmatic ,or
automatic .
Itmaycomprise azero setting indicator device separate from the
totalisation indicator .
3.1.6.1 -Non-automatic setting device
Device allowing .reading ,setting tozerc andchecking ofthe
zero position bytheoperator .

-3-
3.1.6.2-Semi-automatic zerosettingdevice
Asemi-automatic zercsettingdeviceenablestheweighing
machine byamanualcommand,tcbesettozercautomatically
whenasignalhasbeenreceived fromthedevice,rrelse
indicates thevaluebywhichitisnecessary toadjustthe
zerosettingdevice.
3.1.6.3-Autcmatic zerosettingdevice ''
Anautomatic zercsettingdeviceallowsthemachinetobeset
tczercwithouttheintervention oftheoperator whenthebelt
hasbeguntcrunwithnoload.
3.2-Ancillary devices "
3.2.1-Instantaneous leadindicating device
Deviceindicating atalltimestheweightoftheload,actingon
theweighing unit,, -
3.2.2-Flowindicating device
Deviceshewing,atalltimes,theweightofproducttransported
perunittime.
3.2.3-Operaterychecking andmonitoring devices
Devicesenablingcertainfunctions tobecheckedandintended
notably:
-tosimulate theeffectofaconstant load,thebeltturning
whileempty,
tocomparewithoneanother twointegrations ofaloadper''
unitlengthoverthesameinterval oftime,–-
-tosignalwhenmaximumloadormaximum .flowisexceeded,.
-todrawtheattention rftheusertoamalfunction ,more
especially ofthe'electrical' components . '
3.2.4-Flowregulating device
Deviceintendedtoensureapractically constant programmed flow,
3,2.5.-Predeterminingdevice•; :• .f:
Deviceenabling thefeedtotheconveyor tobecutoffwhenthe
totalled loadreachesapredetermined figure,
3.2.6-"Movement simulator",auxiliary checking device
Deviceusedintheworkshop fortheinspection ofccntinuous
totalisers ,witheut.theirconveyors ,andintended tosimulate
themovement ofthebelt.
3.2.7-Totalisation checkingindicator
Devicewithascaledivision smaller :than,thatofthenormally-
usedtotalisation indicating device;itisusedduringinspections ,
4-Metrological^character !sties
4,1-Trtalisation scaledivision .... ;
Value,expressed inunitweight,equals
-incontinuous indication ,tothesmallest division-<?f the
totalised weightscale:,(dt): ...,\ ,

r«s
-indiscontinuous indication ,tcthedifference between tworeadings
cfconsecutive values cfthetotalised weight :(dt.).d
/
4.2 -No-l^ad trtalisation indicate rItero indicator )scale divisicn d
1 . ' 1 1 111 – ' o
The scale division ofthe nc-lcad totalisation indicator allows
monitoring ofthe zero when thebelt isnot loaded .
Value ,expressed in .unit weight ,equals :
-incontinuous indication ,tothesmallest scale division ofthe
no-load totalisation indicator ;
-indiscontinuous indication ,thedifference between twoindications
ofconsecutive values bytheno-load totalisation indicator .
4.3 -Weighing length (L)
Distance between thespindles ofthefurthermost ,rollers cfthe
weighing table ,increased bythehalf-distances separating thespindles
ofeach ofthese rollers from those ofthe nearest rollers cfthe
conveyors .
4.4-Weighin gcycle
Entirety cftheactions relating toeach addition ofpartial loads
attv.eendofwhich thetotalising -elements cccupy the 'sane position
orere infansane state asat£hsouteet ,with theexception of
those ofthetotalisation indicating device .
4.5 -Maximum capacity (Max )andminimum capacity (Min )oftheweighing
unit . ,
4.5.1 Maximum capacity
Themaximum load weighable bytheweighing unit fitted with the
conveyor belt .
4.5.2 -Minimum capacity
The load value below which theusecftheweighing results may
give rise toanexcessive relative error inthetotalisation
results .
4.5,3 -Range ofweighing unit
\ '•-' v
The interval between theminimum andmaximum capacities .
4.6 -Maximum flow (Qmax )andminimum flew (Qmin )
4.6.1 -Maximum flow
Themaximum flow isthat obtained frrthemaximum capacity cf
theweighing unit when thebelt istravelling atthehighest
designed speed .
4.6.2 -Minimum flow
Theminimum flow isthat obtained fortheminimum capacity of
theweighing unit when thebelt istravelling atthelowest
designed speed .
4.7 -Mean test flow
Quotient ofthetotalised load divided bythetesting time .
Q«C
t /

4.8-Minimumtrtalisatirn
Theminimumtrtalised weightrfaproduct bel<-wwhichtheresults
maybeaffected byanerrorgreaterthanthemaximumerrrrtolerated
frranyflowintl:erangefrcmtl.e'maximumtotheminimumflrw.
4.8.1-Minimumtotalisation fcrnormaluse
Valuerfthetrtalised weightstipulated bytheregulations ,
belcwwhichtheresults areconsidered asliabletocontain
excessive inadmissible errors.
4.8.2-Minimumtotalisation fertests
Valueofthetotalised weightstipulated bytheregulations ,
belrwwhichtheresultsyieldedbythetestsarenotconsidered
validforinspection purposes . ,.-
4.9-Maximumloadperunitlength(CI)ofthebelt
Quotient c-fthemaximumcapacity oftheweighing unitdividedbythe
weighing length
r1sMaxC1-7T
CHAPTERII
METRQLQGICAL REQUIREMENTS
-Limits_cf_the_precis_i£n_classes
5.1-Précision classes .,
Totalisers shallbedividedintothreecategories ofprecision ,
namely: .-
Class0.5
Class 1 ,
•' •Clàss '2
5.2-Division intothethreeclasees v
Themachines shallbeclassified intermsoftheircharacteristics
andmetrologicalqualities ,..; :■v•>'
5.2.1-Characteristics ofClass0.5machines
5.2.1.1-Valuec-fthetotalisation scaledivision (dt). -
Thevalueofthetotalisation scaledivision shallbe:
-not-morethan"onefour-thoukahdth pftheload(Cmax)which
canbetotalised inonehouratthemaximumflowrate ,,
-nrtlessthanonehutidred-fchcussandth cfthissameload(Cmax),

5.2.1.2 -Value r£the zero indicator scale division (do)
The value ofthe zero indicator scale division shall ben^t
more than one fifty-th <usandth cftheload (Cmax )which can
betctalised inonehrur atthemaximum flrwrate ,without
being greater than thetotalisation scale division (dt).
.2.2 -Characteristics ofClass 1machines
5.2.2.1 -Value ofthetotalisation scale division (dt)
The value ofthe totalisation scale division shall be:
-not more than one two-thousandth cfthe lead which can be
totalised inonehour atthemaximum flowrate (Cmax ),
notless than cnefifty-thousandth ofthis same load (Cmax ).
5.2.2.2 -The value ofthe zero indicator scale division
The value ofthe zero indicator scale division shall benot
more than onetwenty-thousandth ofthe load which canbe
totalised inonehour atthemaximum flrwrate ,without being
more than the totalisation scale division .
.2.3 -Characteristics ofClass 2machines
5.2,3.1 -Value cfthetotalisation scale divisicn (dt)
The value ofthe totalisation scale division shall be:
-notmore than cne thousandth cfthe lead which can be
totalised inonehour atthemaximum flowrate (Cmax ), ,
-not less than onetwenty -thousandth ofthis same load .
5.2.3.2 -Value ofthe zero indicator scale divisicn
The value cfthe zero indicator scale division shall benet more
than one ten-fikrusandth ofthe load which can betotalised in
onehour atthemaximum flowrate (Cmax ),without being greater
than thetotalisation scale division (dt). ■
.2,4 -Form ofthe scale division
Thescale division shall beoftheform 1.10n,2.I0n,5.10n
nbeing awhelepositive ornegative number rrzero .The scale
divisions cfthezero indicator andofthecontrol totaliser ,
however ,need netccmply with this requirement .
.2.5 -Minimum load ontheweighing unit .v , •
Theminimum load cntheweighing unit shall beequal toonefifth
ofthemaximum load . ~
I =1
Themachine being correctly settozero with noload ,,themaximum
permitted errors shall beequal ,with plus ;orminus sign ,tothevalues
specified below ,f^ranytotalised weight greater than orequal tothe
minimum totalisation .

-7-
6.1-Maximumerrcrspermitted intheinitialinspection
6.1.1-Class0.5
6.1.1.1-Simulatie ntests
-Foranyflrwintherange5-20/oofthemaximumflew,
0.05%oftheleadwhichwculdhavebeentotalised atthe
maximumflrvrateduringthepericdcfthetest-.*
-Foranyflrwintherange20-100%cfthemaximumflew,
0.25%cfthetotalised lead.k• •
6.1.1.2-Material tests
0.35%cfthetotalised loadforanytestflowintherange
20-10G%cfthemaximumflow(plusonecontroltotalisation
scaledivision whentheindicating deviceisdiscontinuous ,
i.e,digital), ,
6.1.2-Class 1
6.1.2.1-Simulation tests
-Foranyflowintherange5-20/=cfthemaximumflow,
0.07% cftheloadwhichwouldhavebeentotalised atthe
maximumflowrateduringtheperiodofthetest.*-
-Foranyflrwintherange20-100%cfthemaximumflrw,
0.35%cfthetotalised load.,. '
6.1.2.2-Material tests
0.5%cfthetotalised loadfrranytestflowintherange
20-100%cfthemaximumflow(plusonecontroltotalisation
scaledivision whentheindicating deviceisdigital).
6.1.3-Glass2
6.1.3.1-Simulation tests
-Foranyflowintherange5-20%cfthemaximumflow,
0.14%cftheloadwhichwouldhavebeentotalised atthe
maximumflowrateduring .theperiodofthetest.*-
-Foranyflowintherange20-100%cfthemaximumflow/
0.77,cfthetotalised load. -'
6.1.3.2-Material tests ;3.
1%ofthetotalised leadfrranytestflowintherange
20-I007ocfthemaximumflow(plusonecontroltotalisation
scaledivision whentheindicating deviceisdigital),
6.2-Maximumerrorspermitted inservice
6.2.1-Class0.5 T
0,5%cfthetotalised loadforanytestflowintherange
20-100%cfthemaximum flow. '
See13.2

-8-
6.2.2-Class 1
Uofthetotalised lradfrranytestflrwintherange
20-100°',cfthemaximum flrw.
6.2.3-Class2
27c,cfthetotalised loadforanytestflewintherange
20-100%cfthemaximum flew.
7*C£nditicns =f2r_atElic§bilitY ff_.?§xipjm_permitted_errr rs
Themaximumpermitted errorsspecified abeveareapplicable onlyto
thetotalisation resultsandunderthefollowing conditions :
7.1-Machines havingmorethanonetotalisation indicator
Whenamachineincorporates severalindicators theresultssupplied
byeachcfthemforoneandthesametotalised loadshallnotccntain
errorsgreaterthanthemaximumpermitted errors.
.Thedifference betweentheresults,takentwobytwo,mustnotbe
greaterthan:
;-onescaledivisim ofthedigitalindicator device,whenthe
results .p.rasupplied bytwodigitalindicators havingcompulsorily
thesamescaledivision,
--theabsolute valueofthemaximumpermitted error,whenthe
resultsaresupplied bytwocontinuous indicators ,
-thegreatercfthetwo'following values:
-absolute valuecfthemaximumpermitted error,
-onedigitalscaledivision ,
whentheresultsaresupplied byacontinuous indicator andby
•adigitalindicator .
7.2-Simulation tests
Theresultcfthesimulatien testsshallbeindependent ofany
variation inthespeedcfthemeterofthetravelsimulator ,
withinthelimitscfplusorminus10%cfthenominalspeedcr
thedesignspeeds.
7.2.1-Movement simulation device
Theuncertainty inthemeasurement' ofthesimulated belttravel
shallbelessthanonefifthofthemaximumpermitted errorson
thetotalised load.
Theseuncertainties areincluded inthemaximumpermitted
errors.
7.2.2-Difference between tworesultsobtained byvaryingthe
application pointcfoneandthesameload.
Whenthepointofapplication ofoneandthesameleadisvaried
inamannercompatible withthedesigneftheloadreceiver,the
difference betweenanytworesultsshallnotbegreaterthanthe
absolute valueofthemaximumpermitted error.
•••/•••

7.2.3 -Zero setting device t
Foranylead balanced bythe ,zero setting device ,theinstrument
shall comply with themaximum permitted errors corresponding to
.the totalised load ... . ,
7.2.4 -Influencing factors
7.2.4.1 -Temperature -
Machines shall ,satisfy therequirements relating tothe
maximum permitted errors ,inthecasecf anytemperature
variation within therange from -10°to+40*C .Nevertheless
fcrspecial uses themachines may have different temperature
ranges from thrse specified above ;inthat case theinterval ,
ofatleast 30°C ,shall bementioned ontherating-plate .In
thetests ,thetemperatures shall beconsidered stable if
their variation isnotgreater than 5°C perhour .
Inthecase ofavariation of10°C andprovided always that the
temperature variation isnotgreater than 5°Cperhour ,the
machines shall besodesigned that their no-load readings do
notvary bymore than .
0.057 =.(ferclass 0.5 )
0.077 .(forclass 1)
0.147 .\fcrclass 2)
ofthe loa:d which would have been totalised atthemaximum flowrate
during thetest period .
7.2.4.2 -Influence cftheelectric power supply
Themachines shall satisfy therequirements relating to ..the
.maximum errors ,inthecase of:variatirns :
-inthevoltage oftheir energy source ,ofplus 10%andminus
157ocfthenominal value , .i'
r-inthe ;nominal frequency ofthesupply from that source ,of,,
plus orminus 270.
7.2.4.3 -Othet influencing factors
Machines shall ,under thenmnal conditions ofuse ,satisfy the
requirements relating tomaximum permitted errors when they are
subjected totheeffects ofinfluencing factors other that !those
mentioned intheforegoing paragraphs andresulting from the
conditions ofinstallation (vibrations ,,atmospheric conditions
etc .)
7.2.5 -Metre logical qualities
7.2.5.1 -Repeatability .....
The difference between two' results obtained with one and the
same load placed under the same' conditions onthe load receiver
•shall notbegreater than theabsolute value ofthe'maximum
, .permitted error .• 4 "
7.2.5.2 -Discrimination ofthetotalising device
Atall rates offlow between theminimum andmaximum and fcr
twoloads differing from each other byavalue equal tothe
maximum permitted error atthis load ,thedifference between
theresults shall beatleast equal tofive tenths ofthe
calculated difference between the loads . ,

-10-
7.2.5.3 -Discrimination cfthe zerc indicator device
Foratest rfaduration ofthree minutes ,thedifference
between thereadings supplied bythezerc indicating device
(a)fcrazerc load ,and (b)foralead equal tcthefraction
ofthemaximum lead asbelcw :
0.05 /»fer class 0.5machines " ;
0.I"fcrclass .1machines
0.2% forclass 2machines ..
shall beclearly appreciable ,
7.2.5.4 -Stability ofzero
After three minutes ofnc-lcad operation ,thezero indicator
•device shall notvary bymore than thefraction shown belcw
ofthe load which would have been obtained atmaximum flow
for three minutes :
0.027o fcr class 0.5machines
0.05% fcr class 1machines
and 0.1% fcr class 2machines .
7.2.5.5 -Tests cfcomplementary indicator devices
Thecomplementary totalisatcr devices
-shall not interfere with theoperation oftheweighing machine
-shall beconstructed insuch away .that theresults obtained
from them are correct .
7.3 -On-site tests
Themaximum permitted errcrs areapplicable tcanyproduct quantity
which isatleast equal totheminimum totalisation ."
7.3.1 -Travel pick-up device 'Thetravel pick-up device shall virtually notslip onthebelt .
7.3.2 -Test instrument
m
Themachine used forchecking purposes in .thematerial tests shall
permit thetotalised load tobechecked with anerror equal tcnot
more than cnefifth ofthemaximum permitted error .
7.3.3 .-Vaiue ofminimum totalisation fornormal use •
Theminimum totalisation shall benot less than thelargest cf
the three values belcws
the load obtained atmaximum flow with cne complete belt
revolution ,or
–inclass 0.5 ,5%cfthe load totalised incnehour atmaximum
flow or500 totalisation scale divisions ;
inclass 1,.2%cftheload totalised inonehour atmaximum
flew or .200 totalisation scale divisions ;
inclass 3,1%oftheload totalised incnehour atmaximum
flow or100tctalisaticn scale divisions .
••#/•••

-11-
7.3.4-Valuescftheminimumtotalisation fortestpurposes
Theminimumtesttotalisation shallbenrtlessthanthelarger
cfthetwcvaluesbelrw:
-quantitytotalised duringthreeminutesattestflrwrate ;
-quantity corresponding tothevaluecftheminimumtotalisation
fornormaluse(specified insection7.3.3,takingintoaccrunt,
ifapplicable ,thevaluecfthetest(orchecking)*totalisation
scaledivision ,inwhichcasethenumberscfdivisions tobe
takenintoconsideration are
1000ferclass0.5
500ferclass1
200forclass2
7.3.5-Maximumerrorspermitted ininspection cfzeroindicator
Afteracomplete numberofbeltrevolutions ,thezeroindicator
shallnothaveshownar,yvariation greaterthanthefraction shown
below,oftheloadobtained atmaximum flowduringthetesttime:
0.05/*fcrclass0.5macnines
0.1%fcrclass1machines
0.2%fcrclass2machines .
See3.2.7,

7.4.1 -Value cftotalisation
scale divisirn (dt)
7.4.2 -Value cfzerc indicator
scale division (de)
7.4,3 -Simulation tests
7.4.4 -Material tests
7.4,4.1 -initial(l )
7.4.4.2 -inservicft(l )
7.4,5 -Minimum t_talisation
value (Tmin )
7.4.6 -Simulation test cfvariation
cfno-load reading with ?.0°C
temperature variation
7.4.7 -Simulaticn test rfzero
indicatcr discriminaticnfl-fy
–Qmax 'Qmin
Qiain^QiQmaxCL?-*8C.5
CmaxdtCmax
100000 ^^4000
dc"<
andCmax
5COOO
doCiLSS l
cmax
50000 <Cmax
2CC0
doV
andCmax
20000
dt dt
Maximum permitted errorsClans 2
Cmax
20000 ν^^dt^Cmax
1000
de^Cmax
and 1000U
dc dt
Qmax xt(l)luOO
_2,5 .
LuOO
Qmin<.Q^(<max :+\TJoU C4c)
Qniin<Q<Q?na*k(yïkC+d^
Tmin A-––Cmax
• 'ICOaod
Tmin >3% dt
0=01000Cmax xt0.7
luOOQmax xt 1.4
1000Qmax xt
3.5
looo
/'5 ^+1v-– C-i-d-\1υου - ■-/
C+u j +(–-V100C-r
+7_ r\
1000υ
flû
Vlooo
t
■20
k_20Ct >C4d|
C+d [
^Taiin>y-andlOOCmax
iand
Tmfn >230 etTmin^ ,■■Cmax^100
Tmin^100dt
0.7
loooCmax xt1.4
1000Cmax xt
7.4.8 -Zerc stability
(simulation )lst test with no
load fer 3minutes2nd test for
3minutes*
.ο
ι
Η
0>
Cf
ο
01c
p
H-
t0
H-
Le?ÏQ
B
(D
Max
10O0Max
LuOOMax
looo
difference between the twe tests tobeclearly perceptible
with noleadfor
3minutesvariation cfzerc indicator
/0.2
^1000Max0.5
loooMax iloooMax
7.4.9 -Zerc stability
(with belt )n-number ofbelt
revolutions
nistrbeawhole
numberC.5
1ΟΟ0Qmax xt1000Qmax xt 2
1000Qmax -xt
Cmax *»load totalised inone hour atmaximum flow C*totalised load
t **test time expressed inhours
(1)thequantity dmust only beadded fordigital indicators having adiscontinuous scale division ofvalue <5

•CHAPTER III
TECHNICAL REQUIREMENTS ,
8-Constitution 1\
- -s */• ' •Continubus totalisërs must comprise :' ' ' '
-aconvey^r belt , v - '
-aweighing unit ,
-•atravel pick-up device ,
-atotalising device crupled tronecrmere indicator devices
-azero setting device .
The zerb setting devices 6f :continuous tctalisers shall befitted with
azerc indicating device ,distinct ;from thetotalisation indicator ,
where : ... •'*
-thetotalisation device only takes into account thepositive values
ofthebelt inrelation toitsmean weight perunit length ,
-thevalue ofthetotalisation scale division isgreater than one
fifty-thousandth oftheweight oftheload totalised inonehour at
maximum flow formachines ofClass 0.5 ,crthan onetwenty-thousandth
oftheweight ofthe load totalised inonehour atmaximum flow f<?r
machines inClass 1,orthan oneten-thousandth oftheweight' ofthe
lead totalised inone hour fitmaximum .flow formachines ofClass 2.
8.1-Conveyor belt
8.1.1 -Continuous totaliser with incorporated conveyor -
Theconveyor shall beconstructed inarobust manner and .shall '.
form arigid assembly .Where theroller support isused asthe
Single IbatJ 'lever oftheweighing unit,' theproduct shall arrive
atright angles tothelinkage ofthis lever .
Machines constructed inthis wayareclassified inClass 2. j
8.1.2 -Continuous totaliser with weighing table
.•''v, -
The frame support oftheconveyor shall beconstructed ina
»•'robust manner . :Inalongitudinal right' 'cross-Bectibni the
roller track shall hotshow -ainyupward concavity .The cotiveyor
shall ,where necessary ^befitted with abelt cleaner device ,the
.position andfunctioning ofwhich shall innowaypffeet .theresults .
8.1.3 -Special installation conditicnsi - . .> -
Continuous totalisers shall beSuch' that theinstallation ofthe
roller track ,theconstitution ,andmounting :cfthebelt <and .the
product feed arrangements donotgive rise toanyerrors .Inthe
result .
8.1.3.1 -Relier track
Anefficient protection system against :ccrrosion andfouling
•shall beprovided :ifnecessary *!
Theupper generatrices oftherollers shall bevirtually
.'.situated ononeandthesame plane ,*
Theroller track shall besuch that noslipping oftheproduct
occurs .

-14-
8.1.3.2 -Conveyor belt
8.1.3.2.1 -Weight per ,unit length cftheconveyer belt
Theweight perunit length ofthebelt shall bevirtually
constant ..'_Xhe !joints must notcause anydisturbance cf
operation .
8.1.3.2.2 -Belt length
Tfielength cfthebelt shall besuch that thezero setting
canbedene inarelatively short time .- .
8.1.3.2.3 -Belt speed
8.1.3.2.3.1 -Thespeed ofthebelt shall besuch :that acomplete
revolution takes place innotmore than 90seconds .
8.1.3.2.3.2 -Thespeed ofthebelt shall notvary bymere than 5%
during aweighing operation .
8.1.3.3 .-Weighing length
The machines shall beconstructed insuch amanner that the
weighing length remains unchanged during service .
Theweighing length adjustment devices shall becapable of
being sealed .
8.1.3.4 -Belt tension
Atonepoint onthetrack thebelt tension shall bemade
practically constant .
Thetension shall besuch that *under normal working conditions ,
thebelt virtually cannot slip onthedriving drum .
-···.·.·· ·Γ
8.1.3.5 -Action cfthepreduet
Thearrival oftheproduct ontheconveyor must notdistort
the results .
8.2 -Weighing unit ' ■
8.2 .1-General
Theweighing unit shall ;besuitable foritspurpose .Itshall be
protected ,insofar asisnecessary ,against anyeffect of
accidental overloading beyopd themaximum capacity .
8.2.2 -Load balancing devicer
Theload balancing device shall have acontinuous action from
zero toaweight value atleast equal tothemaximum load .
TThe weighing operation shall riotcommence until theweighing
:unit isinnormal working order .
8.3 -Travel transducer
Thetravel pick-up device shall :besodesigned that nopossible
slipping canfalsify themeasurement figures ,whether thebelt is
loaded rrnot .

-15-
Whenthemeasurement signalisdiscontinuous itshallcorrespond
-■tobeltmouvements equalto•orlessthantheweighing length.
Whenthemeasurement signaliscontinuous itmustnetbereplaced
byasignalindependent oftheconveyor ..
Anyadjustable partsroustbecapableofbeingsealed,,r
8.4-Totalisation device 1.
rXhetotalisation devicemustoperatepermanently ancmustbesuch
thataccidental stopping ofitsfunctioning issignalled .
8.5-Totalisation display andprint-otst devices
8.5.1-Qualityoftheindication .
Totalisation displayandprint-out devicesshallpermitan
■5accurate,easy :andunambiguous readingoftheresults,bysimple
justaposition ofthefigures,andshalLbearthenameorsymbol
ofthecorresponding unitofweight.
8.5.2-Valueofthescaledivisions , .
Thescaledivision ofthecontinuous indicator devicesshallnot
begreaterthanthescaledivision cfthedigitalindicator
devicesnorsmallerthanonetenthofthevalueofthelatter.
Digitalpartialindicating devicesshallhavescalecivisicns
ofequalvalue.
ii\i •
8.5.3-Theformofdigitalresults \
wTheresultsfurnished bydigitalindicators shallbepresented
exclusively intheformcfalignedfigures. ;
8.5.4-Reliability ofreadings
v';Theresultsacquired mustriot'be>vitiated by,forInstance ,
accidental steppingcfthebeltorbyabreakdown inthepower
supply. .._....... ..•...r
8.5.5-Rangeofindication .
Indicating devicesshallbesuch'thattheyallowthereadingof
avalueatleastequaltothequantity ofproductweighedin
tenhoursofoperation atthemaximumflow.Thisrequirement is
notapplicable topartialindicating devices,
.8.5.6-Complementary indicating ,devices
Thescaledivision ofthecomplementary Indicating defviceshallbe
atleastequalto10timesthetotalisation scaledivision entered
ontherating-plate .Therequirements undersection ,5.2arenot
applicable toit. .... ,
8.5.7-Couplingcfindicating devices ;<•
Totalisation displayandptint-out deviceswhichtak^'intoaccount
onlythepositivebeltvaluesshallbedisengaged whenthebeltis
operating unloaded .
Totalisation displayandprint-out devicewhichtakeintoaccount
positive andnegativebeltvaluesmustbeengagedwhenthebeltis
operating unloaded .Theyshallbeconstructed insuchamanner
thatthereadingcannotbemodified byvibrations .

-16-
The engaging anddisengaging cfthetotalisation devices shall
beperfrrmec lyti>e_machine itself andbeactuated bytheload .
...The ccntrr I,totalisation indicator shalT'ctily be :piit'inoperation
during inspections . „ . 1
8.6 -Zéro setting dcvire
Theeffective weight cfthebelt maybebalanced byanydevice cf
anature appropriate totheprinciple cfoperation pfthe .machine ;
(integration oraddition ,positive andnegative )provided always
;that invariability oftheadjustment cfthedevice isensured .
8.6.1 -Non-autcmatic zero setting device
Where theregulating ofthis device can ;bedone manually ,ina
continuous manner ,anymovement cfthefinal operating element
corresponding to10mmifitisgraduated ,crtc0.5ofaturn
ifitisnot ,shall nothave aneffect greater than :
Tone two-thousandth ofthe load totalised inone hour at
maximum flow ,forclass 0.5machines ;
-cne thousandth ofthe load totalised inone hour at
maximum flow forclass 1machines ;
-two thousandths ofthe load totalised inone hour at
maximum flow for class 2machines .
Where theregulating ofthedevice canbedone manually ina
discontinuous manner ,thevalue ofthescale division oftheactuatin
device shall benotgreater than :
0.005% ofthe load tctali-ed incnehour atmaximum flew for
class 0.5machinée ;
0.01% cfthe load totalised inone hour atmaximum flow for
class 1machines ;.
0.02% cfthe load totalised inonehour atmaximum flow for
class 2machines . ' x ■
The direction ofanycorrection tobemade must beeasily
,determinable . - ;
8.6.2 -Semi-autcmatic orautematic zero setting device
Semi-automatic orautomatic zero setting devices shall be
-constructed insuch .away that :
-theresetting tozero takes place after acomplete number cf
belt turns ;
-theendofthezero measuring oroftheoperation issignalled ;
-asignal isemitted when they reach thelimit cftheir movement .
After operation ofthese devices ,theerror inthesetting shall
notexceed thefollowing values :
0.05% cfmaximum flow for class 0.5machines
0.1% cfmaximum flew for class 1machines
0.2% cfmaximum flow forclass 2machines ' \ l.
durtng theperiod cfthe -test .

-17-
•For inspection purposes theautomatic zero setting devices shall
beshut cff . '• -■•• ■ ■•'
8.6.3 -No-load test device
Machines which donetpermit deduction orwhich only perform
positive integration shall beprovided with ano-load test device
theessential element o£which isanadditional weight equal tc
-not .mere thant
2.5% ofthemaximum capacity oftheweighing unit forclass 1,
57oofthemaximum capacity of .theweighing unit forclass 2,
tcbeplaced cnthe load receptor ,
1The device shall satisfy thefollowing requirements :
.-Theweight shall beapplied inaninvariable manner byan
•Appropriate mechanism .
-Theweight shall beprotected against dust .
-Theapplication oftheweight shall beclearly signalled .
-Theapplication oftheweight shall only bepossible when the
belt isrevolving unloaded .
-Theno-load test operation shall take place according toan
invariable procedure ;this test shall becarried out on
acomplete number ofbelt turns during atleast three minutes .
8.6.4 -Machines intended for direfct sales tothepublic
Machines used fordirect sales tothepublic (inthepresence
ofthepublic )shall beequipped with automatic zero setting
devices . . . '.
8.7 -Zerc indicating device .• •
Where thezero indicating device operates .onthecontinuous
indication principle itshall bepermanently linked tcthe
totalisation indicating device andparticipate intheoperation
ofthis indicator . ■'■
Where thezero indicating device supplies readings only atan
order given manually orautomatically ,itmust notdistort the
totalisation indicator readings , ■ *
3.8 -Signalling ofoverstepping ofthemaximum weighirg-unit capacity
orrfthemaximum flow
Anyexceeding cfthemaximum flow ormaximum capacity values shall
be :signalled ;thesame applies forvalues lower than theminimum
flrw orminimum capacity .
8.9 »Cnmplementary devices
Thecomplementary devices areintended to: ^
-indicate theinstantaneous -load ,
-indicate theflow , . ... .. it-
-predetermine thevalue Vfatotalised load,.
-make theflow constant ,
-perform anyother particular function .
They must notdistort theresults .
These devices arenotsubject totheofficial inspection .

-18-
i'
8.10-Sealing
Thesemachines components thedismantling ofRegulating ofwhich
mustnetbelefttotheusershallbe.providedwith.sealingdevices
orencasedinahousingcapablecfbeingsealed.
9'*■'Ratinr-plate 'sandstamping plates
;Thetotalising machinesshallbear,inthecindershown,asmanycfthe
following markings asarerelevant : ,
9.1-Compulsory basicdata,expressed clearlyinthelanguageofthe
countryofdestination -
9.1,1.-Theidentification .markorstyleofthemanufacturing firm
9.1.2-Themarkorstyleoftheimporter (forimported machines )
9.1.3-Thedesignation ofthemachine
9.1.4-Thetypeandtheserialnumberofthemachine
9.1.5-Thedesignation oftheproductorproducts tobeweighed
9.1.6-Theminimumtotalisation innormaluse,r..kgormetrictons.
9.2-Basicdataexpressed incode
9.2.1-Compulsory inallcases:
-Patternapproval mark
-Classofprecision
-Continuous totalisaticn scaledivisicn dt»•
-Digitaltctalisation scaledivision dtd■
-Nominalspeedcfbeltv■.....m/s..
-Weighing length ,m. ....v
-Identifying countersign onpartsofthemachinenot
directly fastened tothemainbody.,,
9.2.2-Compulsory whererelevant :
-Maximumcapacity Max....'
-.-Maximum flew .Qmax....
-Minimum flow Qmin.
-Scaledivisicn ofzeroindicating device do*
-Numberofcyclesperhour(fe>rmachinesoperating by
addition )
-Theinscription :"Themachinemustberesettozeroevery
threehoursatleast.Thezerocheckmystcontinue for
atleast.....minutes".
(Thezerocheckingtimewillbefixedbythepatternapproval).
9.3-Supplementary markings
Depending ontheparticular useofthemachine,oneormorecf
thefollowing markings mayberequired :-
-"Machineprohibited fordirectsalestothepublic"
-Exclusive usé

-19-
9.4 •»Appearance cfthemarkings
Themarkings rntherating-plate .shall beindelible andhave
dimensicns ,shape andclarity such that they allcw easy reading
under the normal conditions ofuse cfthe machine .
They shall begrouped together atoneclearly visible point cf
t'nemachine ,onarating -plate fixed near theindicating device ,
orinscribed directly ontheindicator itself .
The support bearing themarkings must becapable rfbeing sealed .
9.5 -Stampin g
Therating-plate may include astamping area .Ifitdees nrt
include astamping area ,aplate intended forthis purpose shall
beaffixed close toit.
.CMPTER IV
INSPECTIONS AND TESTS
TheEECpattern approval forweighing machines aswell asthe
EECinitial ,inspection cfweighing machines shall beeffected in
accordance with theprovisions of-theCouncil Directive cf26July 1971
ontheapproximation ofthe lews cftheMember States relating tccommon
previsions ,forboth measuring instruments andmethods cfmetrclogical
control .Details ofsome ofthese provisions aregiven inthis chapter .
10-.gEÇ^pattern_aj_2rcval ,
....... . » r ., • • * *
10,1 -Application frrEEC approval
The application forEEC approval shall contain thefollowing
information and special documents :
-10.1.1 -Metrclogical characteristics
10.1,1.1 -Descriptive data asdefined insection 9above
10.-1 ,1.2~Special features
Special characteristics oftheweighing unit .
10.1.2 -Descriptive documents
*
-Plan orsketch oftheassembly asawhole ;
-Where necessary ,photographs ,plans ormeckups ofdetails
having metrclogical interest .
-Schematic diagram permitting easy comprehension cfthe
. /';principle cfoperation dfthemachine .
10,2-Examination forEECapproval
10.2.1 -Intheworkshops cfthemaker crinanyother suitable place
agreed upon bytheMetrclogical Service concerned andthe
applicant ,with orwithout theconveyer towhich themachine
must becrnnected .
••»/•#♦

Theworkshop tests shall more especially permit cfassessing
theeffect cftheinfluencing parameters specific ,totheselected
mode cfoperation (temperature ,voltage ,frequency ,etc.)examined
separately asfarasthis isnecessary .
Itmust bepossible tocarry ruttheworkshop tests under the same
conditions asthose specified insection 7.2.
10.2.2 -Under normal conditions ofuse
Thematerial tests shall becarried outwith aquantity of
product not less than theminimum test totalisation atflews in
therange from minimum tomaximum flow .
11-EEÇ_initial_ins2ectiçn
TheEEC initial inspection ofmachines shall becarried out intwo
phases :-
-intheworkshop orinanyother suitable place agreed upon bythe
Metrological Service concerned and theapplicant !thetotalisation
checks ,termed "simulation tests ",performed with theaidof
standard weights and atravel simulator device ;
-atplace ofuse :onthecomplete machine ,under thenormal conditions
cfuse ,theinspection procedure commonly termed "material tests ".
11.1 -Workshop tests
Theworkshop inspection shall comprise thefollowing operations :
-verifying that themachine ernferms totheapproved pattern and
examining thevarious parts ofthemechanisms ; ,
-testing thetotalisation bytravel simulation ,inconformity with
therequirements under 7.2.1 .,7.2.2 .,7.2.3 .,7.2.5 .-
Vhere theconveyor initsentirety ferns anintegral part cfthe
lead receiver ,thetests shall beperformed onthecomplete machine .
Where theconveyor acts ontheload receiver only through thepart
ofthebelt which isincontact with therollers cftheweighing
table ,thetests shall beperformed onthetotalising weighing
machine n^tcoupled toitsconveyor .
These tests aretobeperformed with theaidcfatravel simulator
device ..They must clearly shew *onthebasis cfthestandard
weights used ,theresult cfthetotalisation ,that istosay ,the
rtctalised weight andeither themrbercfcycles rrthenumber
representing thelength ofbelt which hasnotionally passed along .
11.2 *■On-site inspection and tests
Thetesting shall bedone asfollows :
11.2.1 -Feasibility ofinspection
Itmust bepossible tocarry outtheon-site inspection andtests
reliably andeasily with theproduct orproducts tcbeweighed .
The installation ofthemachines shall bedesigned insuch a
manner taat itispossible tocheck theiQ without disturbing their
normal operation .

-21-
Achecking instrument must bepermanently available inthe
immediate vicinity cfthemachine crmachines tobechecked
andthestorage andtransport facilities must bearranged in
such away astcprevent &ny loss cfproduct .
11.2.2 -Slipping cfthetravel pick-up device
Theslipping ,ifany ,ofthetravel pick-up device cfmachines
inclasses 0.5 and 1shall bemeasured .
11.2.3 -Zerc resetting test
This test shall beperfr rmed over acomplete number ofbelt
turns under the conditions set out in7.3.5 .
11.2.4 -Stability ofzerrindication
The totalisation indicator shall beobserved every three minutes ;
thevariation ofthe value indicated shall beless than thevalue
calculated according torequirement 7.3.5 .
11.2.5 -Material tests
These tests shall beeffected under the normal conditions of
usewith theproduct that themachine isintended toweigh .
The tests shall relate toatleast twoflrws without allowing the
maximum flow tobeexceeded .These tests shall becarried out
with aquantity ofproduct atleast equal tothetest totalisation .
Theweight cftheproduct shall bechecked befrre orafter its
passage ontheconveyor .
CHAPTER V
»
) j
RECOMMENDATIONS OFAPRACTICAL MATURE
/ •
12-Recçpçendat irns_çrnçernin |i_^esign_and_çr nstruçtion
Machines which meet therequirements stated below areconsidered to
satisfy the crrresponding points inthepreceding chapters .
12.1 -Spécial installation conditions
Continuous tctalisers shall comply with thefollowing conditions
1ofinstallation : ••• •
12.1.1 -Relier track­
:Toerollers orroller trains forming thetrack shall have parallel
. i ■generatrices foteach group ofrollers .Those situated inthe
immediate vicinity oftheenddrums need notnecessarily conform
tothis requirement .Theinclination oftheside roller spindles
tothemiddle roller spindles shall benotmere than 10°fcr
machines ofClass 0.5 ,20° fcrthese cfClass 1and30° fcrthose
ofClass 2.

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?
*•:ri
Thelnclinatirn cfthelongitudinal rightsectioncfthe
planeoftheuppergeneratrices cftherrllersshallnrtbe
morethan5%-forClass0..j,10%fcrClass1and20%fcrClass2,
prrvidsd alwaysthatthereisnoslipping oftheproduct.
OnmachinescfClass0.5andClass1thercllerscftheweighing
d-ivic^iar.dtheres?.t':a';ediir.neaiat.ely b-afreandafterthe
weig-.ii ,igtelleshallbemountedtnballbearixf^scrcnary-device
cfalikenature.Thealignment ofthesercllers,fcragiven
l^a^i ;lntheregimcf,forexample,halftfc<*maximumIrad,shall
becr*rri.?.drutvithanuncertainty nrtexceeding 0.3am,the
eccentricity errcrnotbeinggreaterthan0.2mm.
12.1.2-Conveyorbelt
12.1.2.1 -Joints 1 .
Thebeltshallbemadecfnotmorethantwoparts,eachhaving
thesamecharacteristics .Thejointcrjointsshallbemade
cblr'.qiely andtheacuteanglebetver.nthejointandthelateral
edgecfthebeltshallnotexceed45°. -,
12.1.2.2-Ler.gth
rho-in-woundlengthofthebeltshallnrtexceedthetravelof
apciutcnthebeltatthelowestspeedduringSOsectnds.
12.1.3–Actionofproduct .
Thedistance betweentheweighing tableandthefeedingdevice
shallbaLelweenapproximately twoandfivetimesthedistance
travelled inonesecondattnaximumspeedbyapointonthebelt.
12.2-Movement transducer device
Themarspringcfthelengthcorresponding tothebelttravelorthe
measuring cfthespeedmustbecarriedrutcntheinternalpartcfthe
belt.
Onmachines cperating byintegration ,itmustbepossible toequipthe
novmccj :trar.s^ue.«!!'-:..3ffsentlytrl?.hadevice thenumbercfturns
crfractions taxaso£themoviaienfc piefc-updevicetobecounted .
12.3-Signgllin gof^heexceedingof*:hetneritnunwoifhinp-npifccapacitycr
t<v"-?i^Rrnf>,•:.n'fj'a&diaf.s lrw.crthan,tha flcyorr:i>.linua
capdtity .....
Onindicatcrs displaying floworinstantaneous load,,thepartcfthe
scalewhichisbelowtheminimumcapacity' orminimumflowvalueshall
bedifferentisted fromtherest <-fthedial,-•;
Theseindicators maybereplacedcrSupplemented bya,register ,
provided alwaysthatitdeesnetexercise ,anyinfluence cnthe
results .
•••/♦••
\

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* Where theinstantaneous load indicator isalso aflew indicator ,
itmust bear the remark :
"Flcwrate valid forabelt speed cf....... m/s".
12.4 -Totalisation display and print -cut devices
Totalisation display andprint-cut devices which only take into
account thepositive values ofthebelt shall beengaged netlater
than themoment when the flow isequal to
2.5% ofmaximum flow ,forClass 0.5machines
5% cfmaximum flow ,fcrClass 1machines
5% >ofmaximum flow ,forClass 2machines
12-Requirements concern inginspection andtests
13,1 –Checking ofmovement pick-up device
The chronometric check iscarried outbymeasuring ,with and
without load ,thetime oftravel corresponding toawhole number
ofturns ofthefree drum cfthebelt ,andthetime corresponding to:
-either awhole number ofcycles ,formachines operating by
successive addition ;
-orofadetermined number ofturns orfractions ofturns ofthe
movement pick-up device ,formachines operating byintegration .
Theratio ofthetimes foragiven movement cfthefree drum cfthe
belt unloaded andloaded shall beequal totheratio ofthecounting
times foragiven number cfcycles orcfturns cfthemovement pick-up
device unloaded andloaded .Nevertheless ,tomake allowance forthe
method ofchecking ,adifference ofupto0.1% between these two
ratios shall bepermitted .
The choncmfeter used for this test shall besuch that tenths ofa
second can beread and shall work under the same conditions for each
ofthemeasurements .Theperiod ofthese measurements shall benot
less than rnetenth ofanhour sothat anyoperating errors will be
negligible .
13.2 -Simulatirn test
During thesimulation tests foranyflow Qless than theminimum flow ,
take forthevalue ofQ,aflow equal toQmax /nwith n 5;the •
maximum permitted relative errcr isequal tc
0.05n7 oferClass 0.5machines
0,G7n7 ,forClass 1machines
0.14n% fcrClass 2 machines
rfthe totalised load .
This procedure makes astop-watch unnecessary ;