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OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


Report of TC 9/SC 2 meeting

NMO

18


19 April 2011




Contents


1.

Goal of the meeting

2.

Welcome agenda, roll call, facilities

3.

Confirmation of the minutes of the previous TC 9/SC 2 R 50
-
1 meeting


4.

Matters arising

5.

Discussion of TC 9/SC 2 comments to the 3 CD of R 50
-
1


6.

Conclusion












OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


1.

GOAL OF THE MEETING

The main objectives of the meeting are:

a)

address the TC 9/SC 2
comments to the third committee draft (3 CD)
Recommendation R 50
-
1 Beltweighers, and

b)

to decide on the appropriate wording
for durability requirements in R
50
-
1


2.

WELCOME
AGENDA, ROLL CALL, FACILITIES



Welcome

to NMO
by Morayo

Awosola
, John Goulding and
Richard Sanders
.


Present


Name

Organization

1

Vincent van der Wel

CECIP

2

Gregory Glas

NMO (Type approval expert)

3

Richard Sanders

(18 April
morning
only)

NMO


4

Mr. LU Qinsheng,

Chief Engineer, Nanjing Sanai Industrial Automation

5

Des Redmond

CECIP UK Weighing federation

6

Dennis Vogel

France

7

Ian Dunmill

BIML

8

Bill Ripka

Mineapolis Manufacturer

9

John Barton

NIST (Meeting note taker)

10

Paul Chase

NIST

11

Ian Burrell

Control Systems Technology Pty Ltd Australia

12


Mr. Yuan Yanqiang,

Director, Nanjing Sanai Industrial Automation

13

Mr.Zhong Ruilin,

Assistant research fellow, National Institute of Metrology China

14

Mr.Zhang Jian,.

Engineer, Jiangsu institute of metrology

15

Mr. Wang Min,

Interpreter, Nanjing Sanai Industrial Auto
mation

16

Mr. LI Da,

Jiangsu Saimo Group Co., Ltd

17

Mr. LI Ran,

Jiangsu Saimo Group Co., Ltd

18

Chris Davies (by conference
phone)

Pattern Approval Section, National Measurement Institute
Australia

19

Dr.
Amanda Morison

(by
conference phone)

Manager, Pattern Approval Section,
National Measurement
Institute Australia

20

Mr
I Chin (by conference
phone)

Engineer
, Pattern Approval Section,
National Measurement
Institute Australia

21

Morayo Awosola

NMO Secretariat TC 9/SC 2 (Meeting Chair)

22

George Teunisse

Verispect Netherlands (Meeting note taker)



OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology



Apologies for absence

1.

Ivan Kriz,

Czech Metrology Institute

2.

P. Kok, Nmi Certin, Netherlands

3.

Ntinos Hadjiconstantinou, Cyprus Weights & Measures Service

4.

Arnold Leitner,
BEV, Austria

5.

Ivan Tsibin
,
FSUE SNIIM
, RF

6.

Gulian Couvreur,
METAS
-
Cert, Switzerland

7.

Karsten Schulz, PTB

8.

Poul Claudi Johansen, Denmark

9.

Tsuyoshi Matsumoto, Japan



Meeting
Membership and constitution

Meeting was chaired by Moray Awosola with support from
John Barton
(USA)
and
George
Teunisse

(Netherlands)
who took notes at the meeting.


Meeting participants

included
four

manufacturers:

1)

Jiangsu Saimo Group Co., Ltd

2)

Nanjing Sanai Industrial Automation

3)

Control Systems Technology Pty Ltd,
and

4)

One manufacturer representative

from the USA
.


Nanjing Sanai Industrial Automation
and Jiangsu Saimo Group Co., Ltd each
gave
a short

presentation
outlined below in 4 Matters arising.


The Chinese
OIML representatives

submitted some additional comments to the 3 CD or R 50
-
1 which
will be considered
for the 4 CD.


Australia participated for the whole meeting on both days via a phone conference. The Secretariat
would like to express the appreciation of OIML TC 9/SC 2 for the Australian contribution.





OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


3.

CONFIRMATION OF THE MINUTES OF THE PREVIOUS TC
9/SC 2 R 50 MEETING.


The Minutes of the

TC 9/SC 2 R50
meeting on
4
&
5
February

2009

were approved as correct
without correction.

OIML TC9/SC2 R50 Meeting

(R50
-
1 1 CD)

NWML, 4 & 5 Feb 2009.

Meeting Decisions

1)

Add new accuracy class 0.2 (SC2 Secretariat)
done

2)

Reword the terminology and description for ‘
Empty Belt Profile Correction Device’
(Australia)
done

3)

Amend description of
Whole Belt Totalisation Device
done

4)

Change
Belt length (B
L
) to complete belt revolutions, where appropriate
(SC2
Secretariat)

done

5)

Keep ‘Dynamic Test Mode ‘ and determine the relevance of ‘static test mode’

done

6)

Replace ‘Air cushion conveyor’ with ‘other devices’

done

7)

Delete ‘Totalisation Hold Back Devices’
done

8)

Amend ‘
Minimum value of the totalised load’ to remove references to ’
Tota
lisation
Hold Back Devices’ and

Empty Belt Profile Correction Device’

done

9)

Lowest input signal, µV/e
-

Include in 2

CD with request for further information.

done

10)

Durability

testing
-

Define in time of load, Error limits


initial/in
-
service? Type of
mater
ial tests?
work on that together with 11

11)

Working group for durability testing


US, Aus, Sweden. Aus CHAIR. Produced
feasibility study on durability testing by 15 March 2009.

Done

12)

Table 1


remove subsequent from heading col
umn

3.
done

13)

Family/modules paper

-

WG: US (chair), Netherlands, Denmark by 30 March 2009.

WG (US NL DK) report
produced and
is not controversial

14)

Check references to standards AND SEVERITY LEVELS for emc tests, etc.

Done and some more work on that

15)

Check terminology for VIM, symbols, index

of terms, etc.

work on that

16)

Check D11 references. Check with Netherlands.

work on that

17)

Check 3.2 and 3.3 and combine for simplicity.
(done)





OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


4.

MATTERS ARISING


1.

R 50
-
2
was not

dealt with due to the crowded agenda.



2.

Attendees have
received

by e
-
mail and
distribution at the meeting

the comments,
sorted
in

clause
order

and some highlighted in 2 different colours. Pink being most
urgent to deal with, Yellow second and no colour least priority


3.

Durability

test requirements
April 2008
working group report

(Item 11 from Feb 2009 minutes)

Morayo Awosola
mentioned

that
the report
“Durability requirements for belt weighers”
produced
by the working group

set up at the last R 50 meeting was

available and distributed
with the documents for the meeting.


4.

There w
ere two
presentation
s from Chinese beltweigher manufacturers:


The first presentation
titled

“Laboratory Belt Weigher Tests” by
Mr Min Wang from Nanjing Sanai
Industrial Automation Pty Ltd
.


An updated h
andout of
the
presentation was distributed
for the me
eting
.
Copies will be circulated to
TC 9/SC 2.


Some of the topics touched in the presentation

included
:



Consideration of environmental aspects



Need for Built
-
in resistance



The
questionnaire

indicates in
-
situ tests be required



The China belt weigher test

centre developed a 1 M$ facilities and even newer
(better) 3M$ facilities (capabilities extended)



Most nowadays belt weighers can be tested.



Principle: performing lab test in which first an evaluation of factors of influence is
done and the EUT is exposed

to the amplified factors



Important

parameters
to be

considered



A comparison is made between the lab tests and the in
-
situ tests and great
correlation is shown
.


The second presentation by Mr
Ran Li, of Saimo Technology co., Ltd. titled “
A
durability
testing method for belt weigher” explained
a technique
called “Overland standard material
technique” which uses a hopper scale installed between two belt weighers to obtain and
weigh only a small amount of material to calibrate the belt weigher
effectively. Handouts
were also distributed during this presentation.





OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


5.

DISCUSSION OF TC 9/SC 2 COMMENTS TO THE 3 CD OF R 50
-
1

Morayo Awosola mentioned that the comments received to the 3 CD of R 50
-
1 were
highlighted in order of importance, with the highl
ight in pink colour very urgent, yellow
urgent and no colour non
-
urgent.

On the 18
th

April, t
he
meeting addressed the
following
‘urgent’
comments

with
durability
forming the main topic of discussion
:

First day of meeting
18
th

April

Clause

TC9
Member

Comment

Discussion/Conclusions

2.7.4.2

Temperature

effect at zero
flowrate

Germany


Reference Temperature value was changed previously to
align with value in other OIML Recommendations. When
temperature was changed from 10
°
C to 5
°
C, the error limits
were mistakenly doubled.

Conclusion: Participants agreed that temperature value
should remain at 5
°
C while error limits should be changed
back to original values.

3.2.7.1

Securing or
sealing
measures

Australia


Discussion took place
regarding the distinction between
terms “securing” and “sealing”. Participants agreed that
terms are not interchangeable.

Conclusion: 3.2.7.2


Title changed to include both terms,
3.2.7.1 (d) eliminated.


*Noted that future work is to be done to include
both terms
in Terminology section.

2.7.4.4

Durability

CECIP,
France,
Denmark,
Netherlan
ds
,

Poland,
UK, US.


This discussion followed Chinese presentation regarding
Type Evaluation Lab facilities in China. These facilities
offered many testing possibiliti
es in controlled settings that
are not currently found elsewhere. The meeting recognized
the usefulness of this type of facility.


A broad ranging discussion of durability testing took place
based on 2.7.4.4 and the work group proposal on durability
testi
ng. Most participants in the meeting acknowledged the
benefit of durability testing during as part of the type
approval process, however many did not think that the
implementation would be practical due to various reasons
and existing conditions.


Some of

the concerns and issues that were stated in
opposition of performing durability testing during type
evaluation were:



Under certain regulatory authorities, the inability to


OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


completely certify the instrument under evaluation until
subsequent testing has
been completed. The status of
the instrument between the initial and subsequent tests
is questionable. The point was made that the device
owner may not be permitted to operate the device after
purchasing and installing it until a final/subsequent test is

performed to complete the type approval process.



The limitation of a type approval process is recognized, in
that it will not identify potential sources of error and
poor performance that may result from substandard
installation practices.



The time, effor
t, and cost of arranging an appropriate
setting for an in
-
situ type approval test are extensive,
and the value of this process must be considered before
these expenditures are committed to.



To develop a policy that will be able to be implemented
under each

and every national practice is difficult.



The effects of environmental influences cannot be
completely eliminated, thus making in
-
situ testing
challenging.


The discussions continued with suggestions such as the
possibility raised by CECIP that a provisio
nal type evaluation
be performed in controlled (laboratory) conditions and after
an interim period of legal use a in
-
situ durability test would
be performed which would either validate or rescind the
type approval based on the results of the subsequent tes
t.


Amanda Morison from Australia suggested that it would be a

good
idea to break the test down into key contributing
factors, such as:



temp



Information



belt sack



alignment


There is a discussion whether to leave the subject for the
next revision however but USA is not in favour of leaving out
durability.
John Barton suggests to address all the objections
in the comments.

The meeting on the first day concludes with the “home
w
ork” to produce some new/amended clauses to be
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OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology



On the 19
th

April, the meeting start
ed
off where it ended on the first day with
durability
requirements
:

Second day of meeting
19
th

April

Clause

TC9

Member

Comment

Discussion/Conclusions

2.7.4.4

Durability



Two contributions are distributed on paper with suggested
clauses.

1.

Proposal by Australia 19 April 2011

We make the following proposal in the interests of being able to
move on to finalise the revision of R50
-
1. It is necessary to draw
the discussions regarding durability to a conclusion, and with
current differences in opinions and the national metrological

systems underpinning these, a compromise is required


at least
on a temporary basis.

5.3


Subsequent metrological control

Subsequent metrological control may be performed according to
national regulations.

It is recommended that arrangements for subsequ
ent
metrological control incorporate means for reviewing intervals
for subsequent verification and in
-
service inspection such as
those described in clause 3 of ILAC
-
G24/OIML D10 (2007)
“Guidelines for the determination of calibration intervals of
measuring

instruments”, so as to provide an incentive to produce
equipment which is durable when installed and used, and as a
deterrent to non
-
durable equipment.

Should a type of instrument be found to not be of adequate
durability, action may need to be taken to withdraw the type
approval of that instrument.

5.1.3.4

Durability Testing


Delete


5 Metrological Control

add the following.



OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


The importance of durability of bel
t weighers is recognised. At
this time a common approach to ensuring durability has not
been agreed.

Measures to ensure durability may be taken subject to national
regulations and may include assessments under items (a) to (d)
above.

Subsequent work by T
C9/SC2 may develop additional
requirements or guidance in regard to durability measures and
durability testing. Where measures to ensure durability are
taken, authorities are encouraged to document these and
provided details to TC9/SC2 to inform future wor
k in this regard.

2.

Proposal from CECIP (Des Redmond)

5.3 Variant:
-


"

SUBSEQUENT METROLOGICAL CONTROL.


-
Subject to National Legislation calibration accuracy must be
checked after, not more than 6 months after Initial Verification,
to usual specified
in
-
service tolerances.


-
If the instrument fails to achieve the specified

tolerances the
manufacturer should be allowed to recalibrate


the machine.


-
If after recalibration the machine still fails to achieve the
specified

tolerances it should be rejected
and withdrawn from
Trade Use."


However after discussion it is unanimously accepted that, for
the time being, to implement the Australian proposal with some
modification to be performed by Gregory Glas (NMO) based on
the comments of CECIP and concerning th
e last sentence of the
proposal (type approval).

Chris Davies and Grégory Glas

will further develop these
proposals and then circulate it among the participants of this
meeting for review.


Discussion of further
‘urgent’ comments
:


T.2.11

Australia


Two versions of figure #1 were offered to replace the


OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


Module

figure in 3CD. The majority of participants chose the
version drafted by Netherlands, based on the similarity
of this version to what is contained in OIML F76.


The block “loadcell


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generator” as another type of simulator.

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Displacement
transducer

Denmark,
U.S.


Editorial amendment to correct numbering of clause.

2.1 (Accuracy
classes)


Germany,
U.S.


Concerns regarding the ability to obtain an appropriate
control device (reference scale) for a material test used
in the evaluation of new 0.2 accuracy class.


Germany did not agree that an alternative class 0.3
should be introduced.

Class 0.2 will remai
n as proposed.

2.7.4.2

Temperature
effect at zero
flowrate

Australia,
Netherlands


This clause was amended as shown above.

2.7.5.3,
A.5.5.4

Stability of
zero


Australia


Existing language could be interpreted differently.
Lengthy discussion which included comments from
Denmark, Germany, and U.S.

The participants agreed that Chris Davies from
Australia will develop a new draft wording as a
replacement to this clause and
include those
comments stated by other members.


This draft wording will be circulated to the participants
of the meeting and reviewed. The draft is due within 2
months.

2.8, 2.8.x


Stability of
U.S.


The location of 2.7.5.3 clause seems to imply that a
test for zero stability is only performed during
laboratory testing.



OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


zero



No zero stability test is mentioned under the in
-
situ
tests and the U.S. recommended that a clause (2.8.x)
should be included that
would indicate the testing for
zero stability during in
-
situ tests.


Des Redmond noted that the stability of zero could be
implied as a result of discrimination testing which is a
part of the in
-
situ test.


Considering that 2.7.5.3 will undergo amendments
to
clarify the intent of the test procedures for zero
stability, it is recognized that the draft 2.8.x may also
need to be amended to reflect those changes. In
addition test procedures need to be drafted to be
included under A.8.


2.8.x

Stability of
zero


CECIP,
Netherlands,
U.S.


Wording changes suggested by CECIP and Netherlands
are accepted. To be amended in 4CD.


Per U.S. comments regarding the use of whole belt
totalization in all types of belt weigher installations,
Note (1) will be deleted.

2.8.5
Minimum test
load


Denmark


As per Denmark’s comments the title of the clause will
be changed to “Indication over whole belt revolution”.


Wording in first paragraph “in order to ensure that all
test load readings are obtained” will be deleted
慳a

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The last paragraph in the clause regarding “checking
method” is not clear and should contain specific
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requirement in 3.5.b shall be met.”

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optional. Also “error” should be replaced by “warning”
or “fault”. Chris Davies will offer amended language


OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


warning
indication or
checking
device

for (d) and possibly (e) which will be included in 4CD.

3.3.5

Totalization
indicating
devices

CECIP


The wording in this clause suggest that

the general
totalizer could be reset if not in automatic operation.

a) will be amended.

3.3.6


Engagement
of totalization
indicating
devices

Australia


Wording to be amended in 4CD to reflect that a
disengagement device is not mandatory.

3.7.2.3

Speed
control

U.S.


U.S. commented that it is not the beltweigher that
controls the speed of the belt and that it would be
more correct to use “the output from the belt
displacement transducer” which will ensure that the
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3⸷⸲.5

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楮捬cT楮g:

周攠慢楬楴i⁴o⁣h慮g攠
瑨攠楮捬楮慴楯n⁳ ou汤⁢攠W慫敮a
楮瑯⁡ 捯un琠Tu物rg⁴yp攠敶慬a慴楯n⁡湤⁴敳e
p牯捥摵牥r⁰敲 o牭敤⁡捣o牤楮g汹l

周攠m慮u晡捴畲敲⁳桯u汤⁳p散楦e⁡⁲慮 攠o映楮捬楮慴aon
瑨慴⁴he⁤敶i捥c楳⁣慰慢汥lo映fp敲e瑩Wg⁵ T敲e



OIML TC 9/SC 2 meeting R50
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1

on

Stanton Avenue, Teddington TW11 0JZ

18
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19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


Test methods may be able to be extracted in

some
form from NAWI requirements in R76 as well as R61;

Requirements that are drafted to address the ability to
change inclination after installation is complete should
not be overly restrictive as to inhibit the innovation of
new technology.

The meeting

agreed that Switzerland’s draft for 3.7.2.6
獨潵汤⁢攠楮捬cT敤⁩e 4CMⰠ慮T⁴h慴a慤T楴楯n慬
污lgu慧攠楳敥摥搠瑯⁰牯v楤攠景爠瑥s瑩Wg映捨cng攠o映
楮捬楮慴楯n⁵ T敲eWyp攠慰prov慬⁰牯c敳献

3⸸

M敳e物r瑩ve
m慲歩ags

䅵獴牡汩a


䅵獴牡汩愠aomm敮瑥T⁴ha琠i琠楳⁲
敧e整瑡扬攠瑨慴⁴h攠
concept of “whole belt totalization” has been removed
晲fm⁴he″CM.

售U⸠獴慴敤e瑨慴⁩W⁷慳 W⁩n瑥nT敤⁴桡琠慬a⁲ f敲敮捥s
b攠牥mov敤⁢eW⁲慴桥 ⁴ho獥s獴s瑥m敮瑳⁷楴i楮 捥牴慩n
捬慵獥猠瑨W琠慰p敡e敤⁴o⁥nTo牳攠瑨W琠Wyp攠o映
瑥捨cology
b攠獴物捫cnH⁡ TⰠ楮⁦慣琠no琠慬a⁲ 晥f敮捥e
瑯 睨wl攠b敬e⁴o瑡汩W慴aon⁨慶攠b敥n⁥汩m楮慴敤e

5⸱⸳.4

Mu牡r楬楴i
呥獴楮s

䅵獴牡汩a


Australia’s comment regarding a minimum number of
mon瑨猠景爠慮⁩r瑥物r⁰敲 oT⁢整睥敮⁴es瑳W楮
Tu牡r楬楴i⁴敳瑩Wg⁷楬氠lo琠b攠楮捬cT敤⁩e‴䍄⁤ e⁴o
p牥r楯us⁣on捬c獩sns⁲ g慲T楮g⁤ 牡r楬楴i⁴敳e楮g⸠

䍨慮g敳e瑯⁲ qu楲im敮瑳Wfo爠摵牡r楬楴i⁴敳瑩Wg⁷楬氠l

T牡晴敤⁢礠䍨物猠rav楥猠慮s⁲ vi敷敤⁢礠瑨攠
p慲瑩捩a慮瑳Wo映fh楳im敥瑩Wg⁰物o爠ro⁢ ⁩湣 uT敤⁩e
4䍄.

5⸱⸶.1

卥汥捴Son o映
䕕味

售U.


周攠獥s散eion o映䕕吠楳⁰iob汥l慴a挠楮⁴h慴⁴h敲攠慲a
T楦i敲楮g⁩湴敲 牥瑡瑩Wns映睨楣w⁩湳瑲 m敮瑳e獨潵汤
b攠楮捬cT敤

楮⁡ Wyp攠慰prov慬⁥v慬a慴aon⸠⁔h攠
p慲瑩捩a慮瑳Wo映fh楳im敥瑩Wg⁡杲敥T⁴h慴⁴e獴s獡mp汥l
should include the “worst case” sample, however there
楳i⁤敦楮楴ion⁦o爠rh攠wor獴s捡c攮


䄠睯r欠group⁷慳⁦orm敤econ獩獴楮g o映䩯hn⁂慲瑯n
⡕⹓⸩Ⱐ䥡.⁂畲 敬氠⡁(
献⤬⁇s敧e特⁇污猠⡕⹋⸩ⰠP慵氠
䍨慳攠⡕⹓⸩.瑨慴W睩汬⁤ev敬op mor攠捬c慲ay⁤敦楮敤e
捲楴敲楡⁦o爠瑨攠W敬散瑩on o映䕕味⸠

䄠A牯pos敤⁤e慦琠a猠摵攠睩wh楮′on瑨W⁡湤⁷楬氠扥
捩牣c污瑥搠lmong⁴h攠p慲瑩捩c慮瑳Wof⁴h楳ime整楮g⁦o爠
瑨敩爠牥v楥眮w

6⸵

䥮T楣慴敤

m慳a

售U.


周攠售U⸠.硰牥獳敤⁩瑳 捯nfu獩snv敲⁴h攠v慬a敳
捯n瑡楮敤⁩e 6⸵⁲ g慲a楮g T敶楣i⁲ so汵瑩on⸠⁔h敲攠
睡猠愠污捫co映fon獥湳ss⁷楴h楮⁴h攠m敥瑩Wgn 瑨攠
v慬aT楴i o映瑨攠v慬a敳⁣on瑡Wn敤⁩e⁴h攠捬慵s攠慮T⁴h攠
T楳捵獳楯n on⁴he⁴op楣⁷as⁴慢汥l⁤
攠瑯⁴im攠
捯n獴牡楮W献†䄠s敶i敷 o映瑨攠牥污l敤⁣污es攠䄮3.7⸳.睩汬


OIML TC 9/SC 2 meeting R50
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1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology


be necessary as well. Comments from members are to
be sent to Morayo for consideration in developing the
4CD.

A.8.2.3.1

Single speed
belt weigher

U.S.


The U.S. expressed concern over the fact that testing
using beltweighers that operate at only a single flow
rate is not prohibited for
type evaluations

under the
current Recommendation.

Meeting agreed that the statement “Not applicable to
type approval” t
o⁢攠慤T敤⁩渠 CM

䄮9

N敷⁣污ls攡

䅵獴牡汩a


䥮⁡渠敦景r琠Wo⁲敤e捥c瑩m攠楮volv敤⁩e⁴敳e楮g
b敬瑷敩eh敲猠䅵獴牡汩愠灲opo獥猠瑨慴W瑥獴⁲畮猠扥s
p敲景rm敤⁵獩ng⁴h攠wo牳琠捡獥c捩c捵cs瑡湣敳W

䄠睯r欠group⁣on獩s瑩Wgf 䥡I⁂畲 敬氬⁃桲楳iMav楥猬i
慮T⁐慵氠䍨a
獥⁷楬氠晵r瑨敲WT敶敬op慮gu慧攠fo爠
po獳楢汥⁩湣lu獩on⁩渠4䍄⸠ M牡晴慮gu慧攠睩汬⁢e
p牯v楤敤e瑯⁍o牡yo 睩瑨楮 2 mon瑨献

䄮5⸴

呥獴s⁷楴i
獴慴楣o慤
睩瑨wuW⁴h攠
b敬琠conveyo爠

䍨楮a


China suggests eliminating “without the belt conveyor”
楮⁴h攠捬慵s攠瑩瑬攮†


䥴⁷慳a慧牥敤r瑯⁲ move⁴h攠瑥硴⁡ ⁩琠睡猠獵s敲晬eous
楮景牭a瑩Wn.


6.

Conclusions

The meeting
successfully
address
ed

majority of
the
‘urgent’ and
important TC 9/SC 2
comments
to the 3 CD of R 50
-
1
.

Following a lengthy

discussion
on durability testing requirements, it was

unanimously accepted that,
for the time being, to implement the
Australian proposal

(highlighted in yello
w

above) w
ith some
modification to be performed by Gr
egory Glas (NMO) based on the comments of CECIP and
concerning the last sentence of the proposal (type approval).

Two working groups were established, both to report to the
TC9/SC2
Secretariat within two months:

1)

A work group was formed

consisting of John B
arton (USA
), Ian Burrell (Aus.), Gregory Glas (U.K.),
Paul Chase (U.S.) that will develop more clearly defined criteria for the selection of EUTs.


2)

In an effort to reduce time involved in testing beltweighers
,

Australia proposes that test runs be
perform
ed using the worst case circumstances.

A work
ing

group consisting of Ian Burrell

(Aus)
,
Chris Davies

(Aus)
, and Paul Chase
(USA)
will further develop language for possible inclusion in
4CD. Draft language will be provided to Morayo within 2 months.


The 4 CD of OIML R 50
-
1 incorporating the decisions of the meeting and addressing all
TC9/SC2
comments to the 3 CD will be issued for

the
TC 9/SC 2 consultation later

on

in 2011.



OIML TC 9/SC 2 meeting R50
-
1

on

Stanton Avenue, Teddington TW11 0JZ

18
-
19

April 2011

Tel: + 44 0 208 943 7287



International Organization of Legal Metrology