SIST EN ISO 2759:2014
(Main)Board - Determination of bursting strength (ISO 2759:2014)
Board - Determination of bursting strength (ISO 2759:2014)
EN ISO 2759 specifies a method for measuring the bursting strength of board submitted to increasing hydraulic pressure. It is applicable to all types of board (including corrugated and solid fibreboard) having bursting strengths within the range 350 kPa to 5 500 kPa. It is also applicable to papers or boards having bursting strengths as low as 250 kPa if the paper or board is to be used to prepare a material of higher bursting strength, such as corrugated board. In such cases, the measurements will not necessarily have the accuracy or precision stated for this method and it is necessary to include a note in the test report stating that the test gave results that were below the minimum value required by the method. In the absence of any commercial agreement as to which method should be used for materials with bursting strengths between 350 kPa and 1 400 kPa, all materials with bursting strengths below 600 kPa, except components of solid and corrugated fibreboard, should be tested by ISO 2758 and the remainder by this International Standard.
Pappe - Bestimmung des Berstdruckes (ISO 2759:2014)
Carton - Détermination de la résistance à l'éclatement (ISO 2759:2014)
L'ISO 2759:2014 spécifie une méthode de mesure de la résistance à l'éclatement des cartons soumis à une pression hydraulique croissante. Elle est applicable à tous les types de carton (y compris le carton ondulé et le carton compact) dont les résistances à l'éclatement sont comprises entre 350 kPa et 5 500 kPa. Elle est applicable également aux papiers et cartons dont la résistance à l'éclatement est aussi faible que 250 kPa si le papier ou le carton est destiné à la préparation d'un matériau de résistance à l'éclatement supérieure, du type carton ondulé. Dans ce cas, les mesurages ne présenteront pas forcément l'exactitude ou la fidélité préconisées par la présente méthode.
Karton in lepenka - Ugotavljanje razpočne trdnosti (ISO 2759:2014)
Standard EN ISO 2759 določa metodo za merjenje razpočne trdnosti kartona in lepenke, podvržene naraščajočem hidravličnem tlaku. Velja za vse tipe kartona in lepenke (vključno z valovitim in trdnim kartonom) z razpočno trdnostjo od 350 kPa do 5 500 kPa. Velja tudi za papirje ter kartone in lepenke z nizko razpočno trdnostjo 250 kPa, če se papir oz. karton ali lepenka uporablja za pripravo materiala z višjo razpočno trdnostjo, kot je valoviti karton. V teh primerih meritve ne bodo nujno točne ali natančne, kot je navedeno za to metodo, in je treba v poročilo preskusa vključiti opombo, da so rezultati preskusa pod najnižjo vrednostjo, ki jo zahteva metoda. Če ni poslovnega dogovora, katero metodo naj bi se uporabilo za materiale z razpočno trdnostjo med 350 kPa in 1 400 kPa, naj bi se vse materiale z razpočno trdnostjo pod 600 kPa, razen komponent iz trdnega in valovitega kartona, preskusilo v skladu s standardom ISO 2758, ostale materiale pa v skladu s tem mednarodnim standardom.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 2759:2014
01-oktober-2014
1DGRPHãþD
SIST EN ISO 2759:2003
.DUWRQLQOHSHQND8JRWDYOMDQMHUD]SRþQHWUGQRVWL ,62
Board - Determination of bursting strength (ISO 2759:2014)
Pappe - Bestimmung des Berstdruckes (ISO 2759:2014)
Carton - Détermination de la résistance à l'éclatement (ISO 2759:2014)
Ta slovenski standard je istoveten z: EN ISO 2759:2014
ICS:
85.060 Papir, karton in lepenka Paper and board
SIST EN ISO 2759:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 2759:2014
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SIST EN ISO 2759:2014
EUROPEAN STANDARD
EN ISO 2759
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2014
ICS 85.060 Supersedes EN ISO 2759:2003
English Version
Board - Determination of bursting strength (ISO 2759:2014)
Carton - Détermination de la résistance à l'éclatement (ISO Pappe - Bestimmung des Berstdruckes (ISO 2759:2014)
2759:2014)
This European Standard was approved by CEN on 24 May 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2759:2014 E
worldwide for CEN national Members.
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SIST EN ISO 2759:2014
EN ISO 2759:2014 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 2759:2014
EN ISO 2759:2014 (E)
Foreword
This document (EN ISO 2759:2014) has been prepared by Technical Committee ISO/TC 6 "Paper, board and
pulps" in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at
the latest by January 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 2759:2003.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 2759:2014 has been approved by CEN as EN ISO 2759:2014 without any modification.
3
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SIST EN ISO 2759:2014
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SIST EN ISO 2759:2014
INTERNATIONAL ISO
STANDARD 2759
Fourth edition
2014-07-01
Board — Determination of bursting
strength
Carton — Détermination de la résistance à l’éclatement
Reference number
ISO 2759:2014(E)
©
ISO 2014
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SIST EN ISO 2759:2014
ISO 2759:2014(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved
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SIST EN ISO 2759:2014
ISO 2759:2014(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Calibration . 3
7 Sampling and preparation of test pieces . 3
8 Procedure. 3
9 Expression of results . 4
10 Test report . 4
Annex A (normative) Dimensions of the clamping system . 6
Annex B (normative) Testing the clamps . 8
Annex C (normative) Clamping pressure . 9
Annex D (normative) Calibration of pressure-measuring system .10
Annex E (informative) Precision .11
Bibliography .13
© ISO 2014 – All rights reserved iii
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SIST EN ISO 2759:2014
ISO 2759:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 6, Paper, board and pulps, Subcommittee SC 2,
Test methods and quality specifications for paper and board.
This fourth edition cancels and replaces the third edition (ISO 2759:2001), of which it constitutes a
minor revision to include precision data.
iv © ISO 2014 – All rights reserved
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SIST EN ISO 2759:2014
ISO 2759:2014(E)
Introduction
This International Standard is applicable to boards with bursting strengths between 350 kPa (or 250 kPa
for the components of combined materials) and 5 500 kPa. All components of solid and corrugated
fibreboard, irrespective of bursting strength, should be tested by this International Standard.
For materials with bursting strengths less than 1 400 kPa, an alternative method, based on similar
[1]
principles, is specified in ISO 2758 .
NOTE Due to differences in the specification of the apparatus, tests made on the same material using the
procedures of ISO 2758 and this International Standard will not necessarily give the same results.
© ISO 2014 – All rights reserved v
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SIST EN ISO 2759:2014
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SIST EN ISO 2759:2014
INTERNATIONAL STANDARD ISO 2759:2014(E)
Board — Determination of bursting strength
1 Scope
This International Standard specifies a method for measuring the bursting strength of board submitted
to increasing hydraulic pressure. It is applicable to all types of board (including corrugated and solid
fibreboard) having bursting strengths within the range 350 kPa to 5 500 kPa. It is also applicable to
papers or boards having bursting strengths as low as 250 kPa if the paper or board is to be used to prepare
a material of higher bursting strength, such as corrugated board. In such cases, the measurements will
not necessarily have the accuracy or precision stated for this method and it is necessary to include a
note in the test report stating that the test gave results that were below the minimum value required by
the method.
In the absence of any commercial agreement as to which method should be used for materials with
bursting strengths between 350 kPa and 1 400 kPa, all materials with bursting strengths below 600 kPa,
except components of solid and corrugated fibreboard, should be tested by ISO 2758 and the remainder
by this International Standard.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 186, Paper and board — Sampling to determine average quality
ISO 187, Paper, board and pulps — Standard atmosphere for conditioning and testing and procedure for
monitoring the atmosphere and conditioning of samples
ISO 536, Paper and board — Determination of grammage
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bursting strength
maximum pressure developed by the hydraulic system in forcing an elastic diaphragm through a circular
area of the board when the pressure is applied in the manner described in the method
Note 1 to entry: The indicated bursting pressure includes the pressure required to extend the diaphragm during
the test.
3.2
burst index
bursting strength of the board divided by the grammage of the board determined in accordance with
ISO 536
4 Principle
A test piece, placed over a circular elastic diaphragm, is rigidly clamped at the periphery but free to
bulge with the diaphragm. Hydraulic fluid is pumped at a constant rate, bulging the diaphragm until
the test piece ruptures. The bursting strength of the test piece is the maximum value of the applied
hydraulic pressure.
© ISO 2014 – All rights reserved 1
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SIST EN ISO 2759:2014
ISO 2759:2014(E)
5 Apparatus
The apparatus shall contain, as a minimum, the features described in 5.1 to 5.4.
5.1 Clamping system, for clamping the test piece firmly and uniformly between two annular, plane,
parallel surfaces which shall be smooth (but not polished) and grooved as described in Annex A, which
also gives the dimensions of the clamping system.
One clamping plate shall be held in a swivel joint or similar device so as to ensure that the clamping
pressure is distributed evenly.
Under the load used for testing, the circular openings in the two clamping plates shall be concentric to
within 0,25 mm and the clamping surfaces shall be flat and parallel. The method of checking the clamps
is given in Annex B.
The clamping system shall be capable of applying a clamping pressure in the range 700 kPa to 1 200 kPa
and shall be constructed in such a way that repeatable clamping pressures can be obtained in use (see
Annex C).
In calculating the clamping pressure, the reduction in area due to the grooves shall be ignored.
Any clamping-pressure-indicating device fitted should preferably be scaled to indicate the actual
clamping pressure, not the pressure in the clamping system itself. The clamping pressure may be
calculated from clamping-force and clamp-area information.
5.2 Diaphragm, circular, of natural or synthetic rubber, free from filler or loading, clamped securely
with its outer surface, when at rest, recessed about 5,5 mm relative to the outer plane of the diaphragm-
mounting plate.
The material and construction of the diaphragm shall be such that the pressures required to bulge the
diaphragm outside the outer plane of the diaphragm plate are as follows:
— bulge height: 10 mm ± 0,2 mm, pressure range: 170 kPa to 220 kPa;
— bulge height: 18 mm ± 0,2 mm, pressure range: 250 kPa to 350 kPa.
Diaphragms in use shall be regularly checked and changed if the bulge-height requirements are no
longer met.
5.3 Hydraulic system, to apply an increasing hydraulic pressure to the inside of the diaphragm until
the test pi
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Pappe - Bestimmung des Berstdruckes (ISO/FDIS 2759:2014)Carton - Détermination de la résistance à l'éclatement (ISO/FDIS 2759:2014)Board - Determination of bursting strength (ISO/FDIS 2759:2014)85.060Papir, karton in lepenkaPaper and boardICS:Ta slovenski standard je istoveten z:FprEN ISO 2759kSIST FprEN ISO 2759:2014en01-april-2014kSIST FprEN ISO 2759:2014SLOVENSKI
STANDARD
kSIST FprEN ISO 2759:2014
© ISO 2013Board — Determination of bursting strengthCarton — Détermination de la résistance à l’éclatementINTERNATIONAL STANDARDPlease see the administrative notes on page iiiReference numberISO/FDIS 2759:2013(E)ISO/FDIS2759ISO/TC 6/SC 2Secretariat: SISVoting begins on: 2014-01-Voting terminates on: 2014-03-RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPOR TING DOCUMENTATION.IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STAN-DARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.FINALDRAFTkSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E) ii © ISO 2013 – All rights reservedCOPYRIGHT PROTECTED DOCUMENT©
ISO 2013All rights reservedä Unless otherwise speci Ðiedá no part of this publication may be reproduced or utilized otherwise in any form or by any meansá electronic or mechanicalá including photocopyingá or posting on the internet or an intranetá without prior written permissionä Permission can be requested from either ISO at the address below or ISOïs member body in the country of the requester.ISO copyright of ÐiceTel. + 41 22 749 01 11Fax + 41 22 749 09 47Eæmail copyright 7isoäorgWeb www.iso.orgPublished in SwitzerlandkSIST FprEN ISO 2759:2014
ISO/CEN PARALLEL PROCESSING-cessed under the ISO-lead mode of collaboration as de Ðined in the Vienna Agreementä The
Ðinal draft was established on the basis of comments received during a parallel enquiry on the draftäThis
Ðinal draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel two-month approval vote in ISO and formal vote in CEN.Positive votes shall not be accompanied by comments.Negative votes shall be accompanied by the relevant technical reasons.ISO/FDIS 2759:2013(E) © ISO 2013 – All rights reserved iiikSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E) iv © ISO 2013 – All rights reservedContents PageForeword .vIntroduction .vi1 Scope .12 Normative references .1uTermsanddeÐinitions .14 Principle .15 Apparatus .26 Calibration .27 Sampling and preparation of test pieces .38 Procedure.39 Expression of results .410 Test report .4Annex A (normative) Dimensions of the clamping system .6Annex B (normative) Testing the clamps .8Annex C (normative) Clamping pressure .9Annex D (normative) Calibration of pressure-measuring system .10Annex E (informative) Precision .11Bibliography .13kSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E)Forewordthrough ISO technical committeesä Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizationsá governmental and nonægovernmentalá in liaison with ISOá also take part in the workä electrotechnical standardizationäThe procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1.
In particular the different approval criteria needed for the different types of ISO documents should be notedä
This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rightsä ISO shall not be held responsible for identifying any or all such patent rightsä
Details of on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO speci Ðic terms and expressions related to conformity assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers The committee responsible for this document is ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality speci Ôications for paper and board.This fourth edition cancels and replaces the third edition (ISO 2759:2001), of which it constitutes a minor revision to include precision data. © ISO 2013 – All rights reserved vkSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E)IntroductionThis International Standard is applicable to boards with bursting strengths between 350 kPa (or 250 kPa for the components of combined materials) and 5 500 kPa. All components of solid and corrugated
Ðibreboardá irrespective of bursting strengthá should be tested by this International StandardäFor materials with bursting strengths less than 1 400 kPa, an alternative method, based on similar principlesá is speci Ðied in ISO
t y w z[1].NOTE Due to differences in the speci Ðication of the apparatusá tests made on the same material using the procedures of ISO
t y w z and this International Standard will not necessarily give the same resultsä vi © ISO 2013 – All rights reservedkSIST FprEN ISO 2759:2014
Board — Determination of bursting strength1 ScopeThis International Standard speci Ðies a method for measuring the bursting strength of board submitted
kPa to
w
w r r kPaä It is also applicable to papers or boards having bursting strengths as low as 250 kPa if the paper or board is to be used to prepare a material of higher bursting strength, such as corrugated board. In such cases, the measurements will not necessarily have the accuracy or precision stated for this method and it is necessary to include a note in the test report stating that the test gave results that were below the minimum value required by the methodäIn the absence of any commercial agreement as to which method should be used for materials with bursting strengths between 350 kPa and 1 400 kPa, all materials with bursting strengths below 600 kPa, except components of solid and corrugated
Ðibreboardá should be tested by ISO
t y w z and the remainder by this International Standardä2 Normative referencesThe following documentsá in whole or in partá are normatively referenced in this document and are indispensable for its applicationä For dated referencesá only the edition cited appliesä For undated ISO
s z xá Paper and board — Sampling to determine average qualityISO
s z yá Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 536, uTermsanddeÐinitionsFor the purposes of this document the following terms and de Ðinitions applyä3.1bursting strengthmaximum pressure developed by the hydraulic system in forcing an elastic diaphragm through a circular area of the board when the pressure is applied in the manner described in the methodNote
s to entryã The indicated bursting pressure includes the pressure required to extend the diaphragm during the test.3.2burst indexbursting strength of the board divided by the grammage of the board determined in accordance with ISO 5364 PrincipleA test pieceá placed over a circular elastic diaphragmá is rigidly clamped at the periphery but free to bulge with the diaphragmä Hydraulic
Ðluid is pumped at a constant rateá bulging the diaphragm until the test piece ruptures. The bursting strength of the test piece is the maximum value of the applied hydraulic pressureäFINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 2759:2013(E)© ISO 2013 – All rights reserved 1kSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E)5 ApparatusThe apparatus shall contain, as a minimum, the features described in 5.1 to 5.4.5.1 Clamping systemá for clamping the test piece
Ðirmly and uniformly between two annulará planeá parallel surfaces which shall be smooth (but not polished) and grooved as described in Annex A, which also gives the dimensions of the clamping systemäOne clamping plate shall be held in a swivel joint or similar device so as to ensure that the clamping pressure is distributed evenlyäUnder the load used for testing, the circular openings in the two clamping plates shall be concentric to within
rá t w mm and the clamping surfaces shall be
Ðlat and parallelä The method of checking the clamps is given in Annex B.The clamping system shall be capable of applying a clamping pressure in the range
y r r kPa to
s
t r r kPa and Annex C).In calculating the clamping pressure, the reduction in area due to the grooves shall be ignored.Any clampingæpressureæindicating device
Ðitted should preferably be scaled to indicate the actual clamping pressureá not the pressure in the clamping system itselfä The clamping pressure may be calculated from clamping-force and clamp-area information.5.2 Diaphragmá circulará of natural or synthetic rubberá free from
Ðiller or loadingá clamped securely with its outer surface, when at rest, recessed about 5,5 mm relative to the outer plane of the diaphragm-mounting plate.The material and construction of the diaphragm shall be such that the pressures required to bulge the diaphragm outside the outer plane of the diaphragm plate are as follows:— bulge height: 10 mm ± 0,2 mm, pressure range: 170 kPa to 220 kPa;mm
¬
rá t mmá pressure rangeã
t w r kPa to
u w r kPaäDiaphragms in use shall be regularly checked and changed if the bulgeæheight requirements are no longer met.5.3 Hydraulic systemá to apply an increasing hydraulic pressure to the inside of the diaphragm until the test piece bursts.diaphragm material against the inner surface of the diaphragmä The hydraulic system and the
Ðluid used shall be free from air bubbles. The pumping rate shall be 170 ml/min ± 15 ml/ min.5.4 Pressure-measuring system, to measure bursting strength.It may employ any principle which produces a measurement and display accuracy equal to
¬
s r kPa or
¬
u
¨ of the measurementá whichever is the greaterä The rate of response to the rising hydraulic pressure shall be such that the indicated maximum pressure is within ± 3 % of the true peak pressure as determined by a calibration system of the type described in Annex D.6 Calibration6.1 The apparatus should be
Ðittedá or able to be
Ðittedá with suitable test points to facilitate checking of the
Ðluid pumping rateá calibration of the maximum pressureæmeasurement and display system and calibration of the clamping pressureæindicating device where
Ðittedä 2 © ISO 2013 – All rights reservedkSIST FprEN ISO 2759:2014
ISO/FDIS 2759:2013(E)6.2 Calibration shall be carried out before initial use and at suf Ðiciently frequent intervals to maintain the speci Ðied accuracyä Wherever possibleá calibration of the pressureæsensi
...
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