SIST EN ISO 384:2016
(Main)Laboratory glass and plastics ware - Principles of design and construction of volumetric instruments (ISO 384:2015)
Laboratory glass and plastics ware - Principles of design and construction of volumetric instruments (ISO 384:2015)
This European Standard sets out principles for the design of volumetric instruments manufactured from glass or from plastics in order to facilitate the most reliable and convenient use to the intended degree of accuracy.
Laborgeräte aus Glas oder Kunststoff - Grundlagen für Gestaltung und Bau von Volumenmessgeräten (ISO 384:2015)
Diese Internationale Norm beschreibt Grundlagen für die Gestaltung von Volumenmessgeräten, die aus Glas oder Kunststoff gefertigt sind; die Volumenmessgeräte sollten bei der vorgesehenen Genauigkeit möglichst zuverlässig und einfach zu handhaben sein.
Matériel de laboratoire en verre ou en plastique - Principes de conception et de construction d'instruments volumétriques (ISO 384:2015)
ISO 384:2015 établit les principes pour la conception des instruments volumétriques fabriqués en verre ou en plastique afin de faciliter l'utilisation la plus sûre et la plus commode avec le degré de précision souhaité.
Laboratorijska steklena in plastična posoda - Načela za oblikovanje in konstruiranje volumetrijske steklovine (ISO 384:2015)
Ta evropski standard določa načela za oblikovanje volumetrijskih instrumentov iz stekla ali plastike, da bi tako zagotovili najzanesljivejšo in najpriročnejšo uporabo v okviru predvidene stopnje natančnosti.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 384:2016
01-marec-2016
1DGRPHãþD
SIST ISO 384:1995
/DERUDWRULMVNDVWHNOHQDLQSODVWLþQDSRVRGD1DþHOD]DREOLNRYDQMHLQ
NRQVWUXLUDQMHYROXPHWULMVNHVWHNORYLQH ,62
Laboratory glass and plastics ware - Principles of design and construction of volumetric
instruments (ISO 384:2015)
Laborgeräte aus Glas oder Kunststoff - Grundlagen für Gestaltung und Bau von
Volumenmessgeräten (ISO 384:2015)
Matériel de laboratoire en verre ou en plastique - Principes de conception et de
construction d'instruments volumétriques (ISO 384:2015)
Ta slovenski standard je istoveten z: EN ISO 384:2015
ICS:
17.060 Merjenje prostornine, mase, Measurement of volume,
gostote, viskoznosti mass, density, viscosity
71.040.20 Laboratorijska posoda in Laboratory ware and related
aparati apparatus
SIST EN ISO 384:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 384:2016
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SIST EN ISO 384:2016
EN ISO 384
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2015
EUROPÄISCHE NORM
ICS 17.060
English Version
Laboratory glass and plastics ware - Principles of design
and construction of volumetric instruments (ISO
384:2015)
Matériel de laboratoire en verre ou en plastique - Laborgeräte aus Glas oder Kunststoff - Grundlagen für
Principes de conception et de construction Gestaltung und Bau von Volumenmessgeräten (ISO
d'instruments volumétriques (ISO 384:2015) 384:2015)
This European Standard was approved by CEN on 16 November 2015.
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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 384:2015 E
worldwide for CEN national Members.
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SIST EN ISO 384:2016
EN ISO 384:2015 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 384:2016
EN ISO 384:2015 (E)
European foreword
This document (EN ISO 384:2015) has been prepared by Technical Committee ISO/TC 48 "Laboratory
equipment" in collaboration with Technical Committee CEN/TC 332 “Laboratory equipment” 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 June 2016, and conflicting national standards shall be
withdrawn at the latest by June 2016.
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.
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 384:2015 has been approved by CEN as EN ISO 384:2015 without any modification.
3
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SIST EN ISO 384:2016
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SIST EN ISO 384:2016
INTERNATIONAL ISO
STANDARD 384
Second edition
2015-12-15
Laboratory glass and plastics ware —
Principles of design and construction
of volumetric instruments
Matériel de laboratoire en verre ou en plastique — Principes de
conception et de construction d’instruments volumétriques
Reference number
ISO 384:2015(E)
©
ISO 2015
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SIST EN ISO 384:2016
ISO 384:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved
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SIST EN ISO 384:2016
ISO 384:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Unit of volume and reference temperature . 1
4.1 Unit of volume . 1
4.2 Reference temperature . 1
5 Volumetric accuracy. 1
6 Methods of calibration and use . 2
7 Construction . 3
7.1 Material . 3
7.2 Wall thickness . 3
7.3 Shape . 3
7.4 Capacity . 3
7.5 Stability . 3
7.6 Delivery jets . 3
7.7 Stoppers . 4
7.8 Stopcocks or similar devices . 4
8 Linear dimensions . 4
9 Graduation lines . 5
10 Scales . 6
10.1 Spacing of graduation lines . 6
10.2 Length of graduation lines (see Figure 2) . 6
10.2.1 General. 6
10.2.2 Graduation pattern l . 6
10.2.3 Graduation pattern II . 6
10.2.4 Graduation pattern IIl . . 6
10.2.5 Special cases . 7
10.3 Sequence of graduation lines (see Figure 1) . 7
10.4 Position of graduation lines (see Figure 2) . 8
11 Figuring of graduation lines . 9
12 Marking .10
13 Visibility of graduation lines, figures and inscriptions .11
Annex A (normative) Maximum permissible error in relation to the inner diameter at
the meniscus .12
Bibliography .15
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SIST EN ISO 384:2016
ISO 384:2015(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 48, Laboratory equipment.
This second edition cancels and replaces the first edition (ISO 384:1978), which has been technically
revised to incorporate the following modifications.
a) Volumetric instruments made from plastics have been added to the scope.
b) Volumetric instruments of class AS have been added.
c) The thickness of graduation lines has been modified.
d) The basic principles for construction have been modified such that they comply with the product
standards ISO 1042, ISO 648, ISO 835, ISO 385, ISO 4788 and ISO 4787.
e) The relation between maximum permissible error and the inner diameter has been specified
by an equation.
f) Annex A, explaining that relation, has been reworded.
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SIST EN ISO 384:2016
INTERNATIONAL STANDARD ISO 384:2015(E)
Laboratory glass and plastics ware — Principles of design
and construction of volumetric instruments
1 Scope
This International Standard sets out principles for the design of volumetric instruments manufactured
from glass or from plastics in order to facilitate the most reliable and convenient use to the intended
degree of accuracy.
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 383, Laboratory glassware — Interchangeable conical ground joints
ISO 4787, Laboratory glassware — Volumetric instruments — Methods for testing of capacity and for use
ISO/IEC Guide 99, International vocabulary of metrology — Basic and general concepts and associated
terms (VIM)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC Guide 99 apply.
4 Unit of volume and reference temperature
4.1 Unit of volume
3
The unit of volume shall be the millilitre (ml), which is equivalent to one cubic centimetre (cm ).
4.2 Reference temperature
The standard reference temperature, i.e. the temperature at which the volumetric instrument is
intended to contain or deliver its volume (capacity), shall be 20 °C.
When the volumetric instrument is required for use in a country which has adopted a standard
reference temperature of 27 °C, this figure shall be substituted for 20 °C.
NOTE The capacity of volumetric instruments varies with change of temperature. A volumetric instrument
which was adjusted at 20 °C, but used at 27 °C or vice versa, would show an extra error of only 0,007 % if it is
−6 −1
made of borosilicate glass having a coefficient of cubic thermal expansion of 9,9 × 10 °C and of 0,02 % if it is
−6 −1
made of soda-lime glass having a coefficient of cubic thermal expansion of 27 × 10 °C . These errors are smaller
than the limits of error for most volumetric instruments. It follows, therefore, that the reference temperature is
of minor importance in practical use when dealing with glassware. However, when performing calibrations, it is
important to refer to the reference temperature, especially when considering volumetric plastic ware.
5 Volumetric accuracy
5.1 There are two classes of accuracy:
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SIST EN ISO 384:2016
ISO 384:2015(E)
— the higher grade shall be designated “class A” or “class AS”;
— the lower grade shall be designated “class B”.
5.2 The maximum permissible error shall be specified for each type of volumetric instrument in regard
to the method and purpose of use and the class of accuracy.
5.3 The numerical values of maximum permissible error for volumetric instruments for general
purposes shall be preferably chosen from the series 10 – 12 – 15 – 20 –25 – 30 – 40 – 50 – 60 – 80, or a
suitable decimal multiple thereof.
NOTE This series of preferred numbers has been adopted because decimal sub-multiples of some of the
unrounded numbers, for example 31,5, would appear to imply a degree of precision which is not intended and
which could not be measured in practice.
5.4 The maximum permissible error specified for a series of sizes of a volumetric instrument should
provide a reasonably uniform progression in relation to capacity.
5.5 The maximum permissible error permitted for class B should, in general, be approximately twice
as permitted for class A or AS.
5.6 For volumetric instruments having a scale, the maximum permissible error for either class of
accuracy shall not exceed the volume equivalent (see Annex A) of the smallest scale division.
5.7 The maximum permissible error MPE for class A or AS depends on the internal diameter D (in
millimetres) at the related graduation line and shall not be smaller than derived by Formula (1):
π
2
MPE≥+DD(,04 00,)1 (1)
4
The corresponding class B limit shall be derived in accordance with 5.5.
NOTE The above formula applies for the most common volumetric instruments which have a circular cross-
section, but may be transferred to non-circular cross-sections as well. See Annex A.
5.8 In addition to 5.7, the maximum permissible error specified for any volumetric instrument designed
to deliver shall also be not less than four times the standard deviation determined experimentally by an
experienced operator from a series of at least 10 consecutive determinations of delivered capacity on
the same volumetric instrument, carried out strictly in accordance with the method specified for this
volumetric instrument in ISO 4787.
6 Methods of calibration and use
The method of calibration and use for each type of volumetric instrument is extensively described in
ISO 4787.
The general procedure is based upon a gravimetric determination of the volume of water, either
contained in or delivered by the volumetric instrument under test. This volume of water is calculated
from its mass under consideration of air buoyancy and water density.
Volumetric instruments manufactured from plastics should be considered to be calibrated more often
than glass instruments, because of the lower long-term stability of plastic instruments.
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SIST EN ISO 384:2016
ISO 384:2015(E)
7 Construction
7.1 Material
Volumetric instruments shall be constructed of glass or plastic of suitable chemical and thermal
properties. They shall be as free as possible from visible defects and shall be reasonably free from
internal stress.
7.2 Wall thickness
The volumetric instruments shall be sufficiently robust in construction to withstand usual laboratory
usage and the wall thickness shall show no gross departure from uniformity.
7.3 Shape
All volumetric instruments shall be of a shape which will facilit
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