Tests for general properties of aggregates - Part 5: Common equipment and calibration

This European standard specifies general requirements for common equipment, calibration procedures and reagents for the testing of the properties of aggregates

Prüfverfahren für allgemeine Eigenschaften von Gesteinskömungen - Teil 5: Allgemeine Prüfeinrichtungen und Kalibrierung

Diese Europäische Norm legt allgemeingültige Anforderungen an die gebräuchlichen Prüfeinrichtungen,
Kalibrierungs- und Überprüfungsverfahren und Reagenzien für die Prüfung der Eigenschaften von Gesteinskörnungen
fest.
Bei Überprüfungen dürfen auch andere Verfahren, als die in dieser Norm beschriebenen, angewendet
werden, sofern ein ausreichender Zusammenhang mit den entsprechenden in dieser Norm beschriebenen
Verfahren nachgewiesen wurden. Bei Streitfällen sind die in dieser Norm beschriebenen Überprüfungsverfahren
anzuwenden.

Essais pour déterminer les propriétés générales des granulats - Partie 5: Equipments communs et étalonnage

La présente norme européenne spécifie les prescriptions générales concernant les équipements communs, les procédures d'étalonnage et les réactifs utilisés pour les essais destinés à déterminer les propriétés des granulats.

Preskusi splošnih lastnosti agregatov - 5. del: Splošne zahteve za opremo in kalibracijo

Ta evropski standard določa splošne zahteve za splošno opremo, kalibracijske postopke in reagente za preskušanje lastnosti agregatov.

General Information

Status
Published
Public Enquiry End Date
19-Nov-2009
Publication Date
11-Apr-2012
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-Mar-2012
Due Date
01-Jun-2012
Completion Date
12-Apr-2012

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SLOVENSKI STANDARD
SIST EN 932-5:2012
01-maj-2012
1DGRPHãþD
SIST EN 932-5:2000
Preskusi splošnih lastnosti agregatov - 5. del: Splošne zahteve za opremo in
kalibracijo

Tests for general properties of aggregates - Part 5: Common equipment and calibration

Prüfverfahren für allgemeine Eigenschaften von Gesteinskömungen - Teil 5: Allgemeine

Prüfeinrichtungen und Kalibrierung

Essais pour déterminer les propriétés générales des granulats - Partie 5: Equipments

communs et étalonnage
Ta slovenski standard je istoveten z: EN 932-5:2012
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
SIST EN 932-5:2012 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 932-5:2012
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SIST EN 932-5:2012
EUROPEAN STANDARD
EN 932-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2012
ICS 91.100.15 Supersedes EN 932-5:1999
English Version
Tests for general properties of aggregates - Part 5: Common
equipment and calibration

Essais pour déterminer les propriétés générales des Prüfverfahren für allgemeine Eigenschaften von

granulats - Partie 5: Equipements communs et étalonnage Gesteinskörnungen - Teil 5: Allgemeine Prüfeinrichtungen

und Kalibrierung
This European Standard was approved by CEN on 30 December 2011.

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, 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
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 932-5:2012: E

worldwide for CEN national Members.
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SIST EN 932-5:2012
EN 932-5:2012 (E)
Contents Page

Foreword ..............................................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Terms and definitions ...........................................................................................................................5

4 Common equipment ..............................................................................................................................5

4.1 Tolerances ..............................................................................................................................................5

4.1.1 Manufacturing tolerances .....................................................................................................................5

4.1.2 Working tolerances................................................................................................................................6

4.2 Measuring instruments .........................................................................................................................6

4.2.1 General ....................................................................................................................................................6

4.2.2 Balances and weights ...........................................................................................................................6

4.2.3 Thermometers ........................................................................................................................................7

4.2.4 Dimensional measurement instruments .............................................................................................7

4.2.5 Timers .....................................................................................................................................................8

4.2.6 Volumetric glassware ............................................................................................................................8

4.2.7 Density hydrometers .............................................................................................................................8

4.3 Other instruments ..................................................................................................................................8

4.3.1 Ovens ......................................................................................................................................................8

4.3.2 Constant temperature bath ...................................................................................................................8

4.3.3 Test sieves and bar sieves ...................................................................................................................8

4.3.4 Moulds and drums .................................................................................................................................8

4.3.5 Sieve shakers .........................................................................................................................................9

4.3.6 Desiccators and desiccator cabinets ..................................................................................................9

4.3.7 Bottle shakers and rollers .....................................................................................................................9

4.3.8 Heaters ....................................................................................................................................................9

4.3.9 Rotating machinery ...............................................................................................................................9

4.3.10 Vibrating machinery ..............................................................................................................................9

4.3.11 Pressure or vacuum ..............................................................................................................................9

5 Calibration and checking ......................................................................................................................9

5.1 Calibration of reference standards and reference instruments ........................................................9

5.1.1 Laboratory reference standards ...........................................................................................................9

5.1.2 Specifications for reference standards and reference instruments .............................................. 10

5.2 Calibration and checking of test equipment .................................................................................... 11

5.2.1 Traceability .......................................................................................................................................... 11

5.2.2 External and in-house calibration ..................................................................................................... 11

5.2.3 Calibration and checking of measuring instruments ...................................................................... 12

5.2.4 Checking of other instruments .......................................................................................................... 14

6 Reagents .............................................................................................................................................. 17

6.1 Distilled water ...................................................................................................................................... 17

6.2 Chemical reagents .............................................................................................................................. 18

Annex A (normative) Method for the performance check of sieves ............................................................. 19

Annex B (normative) Procedure for the manual checking of perforated plate test sieve openings .......... 22

B.1 Equipment for checking the openings of plate test sieves ............................................................ 22

B.2 Calibration of sieve check gauges .................................................................................................... 22

B.3 Test procedure .................................................................................................................................... 22

Annex C (informative) Balance recommendation for various standard test methods ................................ 24

Bibliography ..................................................................................................................................................... 25

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SIST EN 932-5:2012
EN 932-5:2012 (E)
Foreword

This document (EN 932-5:2012) has been prepared by Technical Committee CEN/TC 154 “Aggregates”, the

secretariat of which is held by BSI.

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 August 2012, and conflicting national standards shall be withdrawn at

the latest by August 2012.

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 932-5:1999.

This standard forms part of a series of standards for general properties of aggregates. Test methods for other

properties of aggregates are covered by the following European Standards:
EN 933, Tests for geometrical properties of aggregates;
EN 1097, Tests for mechanical and physical properties of aggregates;
EN 1367, Tests for thermal and weathering properties of aggregates;
EN 1744, Tests for chemical properties of aggregates;
EN 13179, Tests for filler aggregate used in bituminous mixtures.
The other parts of EN 932, Tests for general properties of aggregates are:
 Part 1: Methods for sampling;
 Part 2: Methods for reducing laboratory samples;
 Part 3: Procedure and terminology for simplified petrographic description;
 Part 6: Definitions of repeatability and reproducibility.

In the bibliography, reference is made to the International Organization for Legal Metrology (OIML)

classification, which this standard has adopted for the purposes of establishing a frequency of calibration for

balance weights.

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, 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.
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SIST EN 932-5:2012
EN 932-5:2012 (E)
1 Scope

This European Standard specifies general requirements for common equipment, calibration and checking

procedures and reagents for the testing of the properties of aggregates.

In the case of checking, other procedures than the ones described in this standard may be used provided that

appropriate working relationships with the corresponding methods described in this standard have been

established. In case of dispute, the checking methods described in this standard shall be used.

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.

EN 933-1, Tests for geometrical properties of aggregates — Part 1: Determination of particle size

distribution — Sieving method

EN 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size

distribution — Test sieves, nominal size of apertures

EN 933-3, Tests for geometrical properties of aggregates — Part 3: Determination of particle shape —

Flakiness index

EN 933-8, Tests for geometrical properties of aggregates — Part 8: Assessment of fines — Sand equivalent

test

EN ISO 3650, Geometrical product specifications (GPS) — Length standards — Gauge blocks

(ISO 3650:1998)

ISO 384, Laboratory glassware — Principles of design and construction of volumetric glassware

ISO 386, Liquid-in-glass laboratory thermometers — Principles of design, construction and use

ISO 649-1, Laboratory glassware — Density hydrometers for general purposes — Part 1: Specification

ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth

ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal

plate
ISO 4788, Laboratory glassware — Graduated measuring cylinders

ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications —- First series

ISO 6353-3, Reagents for chemical analysis — Part 3: Specifications — Second series

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SIST EN 932-5:2012
EN 932-5:2012 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
calibration

operation that, under specified conditions, in a first step, establishes a relation between the quantity values with

measurement uncertainties provided by measurement standards and corresponding indications with associated

measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a

measurement result from an indication.

Note 1 to entry: A calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or

calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated

measurement uncertainty.

Note 2 to entry: For more information, see VIM – International vocabulary of basic and general terms in metrology (available

on http://www.bipm.org/ ).
3.2
checking
operation of assuring either:

 that the results of measurements of a property (such as length, mass, temperature or time) at selected

values made by a measuring instrument, or a set of them, have not deviated from that which was

measured when the equipment was last calibrated within a pre-defined tolerance; or

 that a property (such as rotation speed, vibration frequency) of an item, or a set of items, of equipment

complies with the relevant requirements for that equipment.
3.3
verification scale interval (e) for balances

value, expressed in units of mass, used for the classification and verification of a balance

3.4
actual scale interval (d)
value, expressed as:

 the difference between the values corresponding to two consecutive scale marks, for analogue indication,

 the difference between two consecutive indicated values, for digital indication.

3.5
tolerance

maximum permissible deviation from the nominal value of a measurable characteristic

Note 1 to entry: In the present standard, tolerances may be expressed either as an absolute quantity without sign or as a

percentage of the nominal value of a measurable characteristic.
4 Common equipment
4.1 Tolerances
4.1.1 Manufacturing tolerances

NOTE By convention, the tolerances (or limits) indicated in the aggregate test standards are manufacturing

tolerances (or limits), if not otherwise stated.
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SIST EN 932-5:2012
EN 932-5:2012 (E)
4.1.1.1 Linear dimensions

Where a dimension is specified with manufacturing tolerances or limits, it shall be an essential dimension.

NOTE Dimensions stated without tolerances are given for guidance.
4.1.1.2 Mass

Where mass is specified, the manufacturing tolerance shall be ± 1 % of the specified mass unless otherwise

stated.
4.1.2 Working tolerances

Working tolerances apply to equipment (e.g. apparatus) after being subjected to wear in use, and shall be not

more than twice the manufacturing tolerance unless otherwise specified.
4.2 Measuring instruments
4.2.1 General

Measuring instruments shall have greater measurement accuracy than the corresponding tolerance defined in

the test method.

NOTE Unless stated otherwise, the measurement accuracy of the instrument used should be at least five times better

than the corresponding tolerance.
4.2.2 Balances and weights

Balances and weights shall be calibrated. Calibration and checking of balances and weights shall comply with

5.2.3.2 and 5.2.3.3 respectively.
NOTE 1 Balances can incorporate an analogue or a digital display.

The balance (and weights if required) selected for a weighing shall enable the mass to be determined to the

accuracy required by the test method. If calibration determines that the balance is not suitable for use across

its full working range, it shall be labelled to show the upper and lower limits of usable capacity.

NOTE 2 Examples of categories of balances are given in Table 1. Annex C relates these categories to most aggregate

standard test methods.
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SIST EN 932-5:2012
EN 932-5:2012 (E)

Table 1 — Examples of categories of balances, their accuracy classes and corresponding tolerances

for intermediate checks
Balance Actual Tolerance for
Balance Verification Minimum Maximum
accuracy scale intermediate
category scale interval e capacity capacity
class interval d checks
(g) (g) (g) (g) (kg)
a a
I(special) 1 0,001 0,0001 0,0005 0,01 -
a a
II (high) 2 0,01 0,001 0,003 0,02 1
a a
3 0,1 0,01 0,03 0,5 10
a a
4 1 0,3 100
0,1 5
III (medium) 5 1 1 2 20 10
6 2 2 4 40 20
7 200 200 400 4000 2000
NOTE This table is based on OIML (2006).
Balances fitted with an auxiliary indicating device.
4.2.3 Thermometers

Thermometers shall be selected as appropriate to the test method. Actual scale interval shall not be greater

than half of the required accuracy.

For liquid-in-glass thermometers the form of graduations shall be as specified in ISO 386. The calibration of

thermometers shall comply with 5.2.3.4.
4.2.4 Dimensional measurement instruments
4.2.4.1 Steel rules

Steel rules shall have scale divisions at least every 1 mm and shall be checked in accordance with 5.2.3.5.

4.2.4.2 Callipers

Digital, dial and vernier callipers for internal and external measurements shall have an actual scale interval of

0,1 mm or better and shall be calibrated in accordance with 5.2.3.5.
4.2.4.3 Micrometers

Micrometer measuring devices shall have an actual scale interval of 0,01 mm or better, or 0,002 mm or better,

depending upon the accuracy specified in the test method. Calibration shall be in accordance with 5.2.3.5.

4.2.4.4 Dial gauges

Dial gauges shall have an actual scale interval of 0,01 mm or better, or 0,002 mm or better, depending upon

the accuracy and range of scale required by the test method. Dial gauges shall be calibrated in accordance

with 5.2.3.5.
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SIST EN 932-5:2012
EN 932-5:2012 (E)
4.2.5 Timers
Timers shall be calibrated in accordance with 5.2.3.6.
NOTE 1 Timers having an actual scale interval of 1 s are suitable.

NOTE 2 A suitably placed wallclock with seconds hand, and large enough to read from the work station is an

acceptable alternative.
4.2.6 Volumetric glassware

Volumetric glassware complying with class A or B of ISO 384 shall be used. Class B volumetric glassware

shall be checked before initial use in accordance with 5.2.3.7.

Where certified volumetric glassware complying with class A of ISO 384 is used, the check is not required.

4.2.7 Density hydrometers

Density hydrometers shall comply with ISO 649-1, with a range and scale interval that is appropriate to the

test method. The scale interval shall not be greater than half of the required accuracy of reading. Density

hydrometers shall be calibrated in accordance with 5.2.3.8.
4.3 Other instruments
4.3.1 Ovens

Ovens shall incorporate a thermostatic temperature control which can be set to maintain the specified working

temperature to within ± 5 °C, unless a different tolerance is specified in the test method.

Each oven shall have a temperature-indicating device of the required range and accuracy.

Ovens shall be checked in accordance with 5.2.4.2.
4.3.2 Constant temperature bath

Constant temperature water baths shall incorporate a thermostatic temperature control which can be set to

maintain the specified working temperature to within a tolerance appropriate to the test method requirements.

Each constant temperature bath shall have a temperature-indicating device of the required range and accuracy.

Constant temperature water baths shall be checked in accordance with 5.2.4.3.
4.3.3 Test sieves and bar sieves

Test sieves shall comply with EN 933-2. Bar sieves shall comply with EN 933-3. Perforated plate square hole

test sieves conforming to ISO 3310-2 shall have an aperture size of at least 4 mm. Woven wire test sieves

conforming to ISO 3310-1 shall have an aperture size of less than 4 mm.

Each sieve shall be separately identified. Checks on sieves shall be carried out in accordance with 5.2.4.4.

4.3.4 Moulds and drums

Items of equipment such as moulds and drums shall be checked in accordance with 5.2.4.5.

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SIST EN 932-5:2012
EN 932-5:2012 (E)
4.3.5 Sieve shakers

Mechanical sieve shakers shall hold a nest of sieves securely with their lid and receiver. Their design shall

ensure that the test material on any given sieve progresses over the surface of the sieve when it is agitated.

4.3.6 Desiccators and desiccator cabinets

Desiccators shall be provided with a lid which forms an airtight seal. Desiccator cabinets shall be fitted with a

door which forms an airtight seal. Where shelves are fitted they shall permit free vertical circulation of air when

the desiccator is in use.

NOTE 1 The most frequently used desiccant is self-indicating silica gel crystals.

NOTE 2 Glass vacuum desiccators should be covered by a safety cage during evacuation, while under vacuum and

during vacuum release.
4.3.7 Bottle shakers and rollers

A motorised unit for shaking and/or rotating containers shall be capable of rotating or agitating the containers

continuously at the specified speed.

Motorised bottle shakers and rollers shall be checked in accordance with 5.2.4.8.

4.3.8 Heaters

An electric hotplate shall be fitted with an adjustable control to provide boiling and/or simmering at specified

temperatures.

NOTE A Bunsen burner, with tripod and gauze, can be used as an alternative controllable source of heat.

4.3.9 Rotating machinery

Where the speed of rotation of an item of machinery is critical to the test method, it shall be checked

according to 5.2.4.9.
4.3.10 Vibrating machinery

Where the frequency of vibration of an item of machinery is critical to the test method, it shall be checked

according to 5.2.4.10.
4.3.11 Pressure or vacuum

Where the pressure or vacuum is critical to the test method, it shall be checked according to 5.2.4.11.

5 Calibration and checking
5.1 Calibration of reference standards and reference instruments
5.1.1 Laboratory reference standards
5.1.1.1 Reference standards for in-house calibration

Where calibration of test measuring instruments is carried out in-house the laboratory shall hold appropriate

reference standards or reference instruments that are used solely for calibration purposes.

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SIST EN 932-5:2012
EN 932-5:2012 (E)

Reference standards or reference instruments shall be retained securely in a suitable environment separate

from working standards or instruments when not in use. They shall be used only for calibration purposes and

by personnel who are trained in their use.

Reference standards and reference instruments shall have greater accuracy than the working device so that

the desired accuracy of test measurement is achieved.

Reference standards and reference instruments shall be calibrated and certified as specified in 5.1.1.2 and

5.1.2. For convenience, the maximum calibration intervals for each reference standard and each reference

instrument covered by 5.1.2 are summarized in Table 2.

Table 2 — Calibration intervals for reference standards and reference instruments

Reference standard Maximum
or instrument calibration interval
Weights 2 years
Liquid in glass 5 years
thermometers ISO 386
Other liquid in glass 5 years
thermometers
Platinum resistance 1 year
thermometers
Thermocouples 1 year
Dimensional standards 5 years
Pressure gauges 2 years
Manometers 2 years

Re-calibration of reference standards or reference instruments shall be at intervals not greater than those

specified in 5.1.2 for each type of instrument. Notwithstanding these intervals, whenever a change in accuracy

of a reference standard or a reference instrument is suspected, or when a reference standard or reference

instrument has been mishandled, repaired, dismantled, adjusted or overhauled, it shall be re-calibrated before

further use.

5.1.1.2 Calibration and traceability of reference standards and reference instruments

Reference standards and reference instruments shall be calibrated by an accredited calibration laboratory.

The calibration certificate shall show traceability to recognised standards of measurement.

NOTE An accredited calibration laboratory complying with EN ISO/IEC 17025 or an acceptable international body is

suitable. This laboratory should be accredited for the calibration concerned.
5.1.2 Specifications for reference standards and reference instruments
5.1.2.1 Reference weights

Reference weights shall be appropriate to the category of balance being calibrated, and shall have a tolerance

(maximum permissible error) better than the actual scale interval of the balance to be calibrated. Reference

weights shall be identified as such and kept in a secure place, separate from working weights.

Reference weights shall be calibrated when first brought into use. Reference weights of class E , E , F , F

1 2 1 2
and M shall be re-calibrated every two years (see Note in 5.2.3.3).
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SIST EN 932-5:2012
EN 932-5:2012 (E)
5.1.2.2 Reference thermometers and thermocouples

Liquid-in-glass thermometers used as reference thermometers for calibrating laboratory working

thermometers shall be calibrated before initial use and re-calibrated or replaced at five-year intervals.

An ice point or another appropriate single point check of reference thermometers shall be carried out six

months after first being brought into use, then annually in addition to the five-year calibration interval

requirement.

Calibrated thermocouples and platinum resistance thermometers used as reference instruments shall be re-

calibrated at least once a year.
5.1.2.3 Dimensional standards

Gauge blocks shall comply with EN ISO 3650 and shall be re-calibrated at five-year intervals.

5.1.2.4 Reference pressure gauges and manometers

Reference pressure gauges and manometers shall be re-calibrated at least once every two years.

5.2 Calibration and checking of test equipment
5.2.1 Traceability

All measurements necessary for the performance of tests covered by this standard shall be traceable, where

this concept is applicable, to national or international standards of measurement through an unbroken chain of

calibrations. The number of steps in the process shall be no greater than necessary to achieve the required

accuracy. Check results shall be documented.
5.2.2 External and in-house calibration
5.2.2.1 General requirements

Calibrations shall be carried out either by an external organisation, or in-house by the laboratory's own staff.

Systems used shall follow the principles and requirements given in 5.2.4 and under the relevant test method,

where appropriate.

All calibrated equipment shall be used only over the range for which it has been calibrated.

5.2.2.2 External calibration

Wherever possible, all external calibrations shall be carried out by a nationally recognised accredited

calibration laboratory. When calibration is carried out under contract by an external organisation, traceability

shall be est
...

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