Metallic materials - Charpy pendulum impact test - Part 2: Verification of testing machines (ISO 148-2:2008)

ISO 148-2:2008 covers the verification of the constructional elements of pendulum-type impact testing machines. It is applicable to machines with 2 mm or 8 mm strikers used for pendulum impact tests carried out, for instance, in accordance with ISO 148-1.
It can analogously be applied to pendulum impact testing machines of various capacities and of different design.
Impact machines used for industrial, general or research laboratory testing of metallic materials in accordance with ISO 148-2:2008 are referred to as industrial machines. Those with more stringent requirements are referred to as reference machines. Specifications for the verification of reference machines are found in ISO 148-3.
ISO 148-2:2008 describes two methods of verification: a direct method and an indirect method.

Metallische Werkstoffe - Kerbschlagbiegeversuch nach Charpy - Teil 2: Prüfung der Prüfmaschinen (Pendelschlagwerke) (ISO 148-2:2008)

In diesem Teil von ISO 148 wird die Prüfung der einzelnen Teile eines Pendelschlagwerks festgelegt. Er gilt für Pendelschlagwerke mit 2 mm Hämmern oder mit 8 mm Hämmern, die z. B. für Kerbschlagbiegeversuche nach ISO 148 1 angewendet werden.
Dieser Teil von ISO 148 kann analog auf Pendelschlagwerke anderer Bauarten angewendet werden, die auch ein anderes Arbeitsvermögen haben können.
Pendelschlagwerke, die für die Prüfung metallischer Werkstoffe nach dem vorliegenden Teil von ISO 148 für betriebliche, für allgemeine und für Forschungszwecke vorgesehen sind, werden als Betriebs Pendelschlag-werke bezeichnet. Pendelschlagwerke, für die strengere Anforderungen gelten, werden als Referenz-Pendel-schlagwerke bezeichnet. Festlegungen für die Prüfung von Referenz Pendelschlagwerken sind in ISO 148 3 enthalten.
In diesem Teil von ISO 148 werden zwei Verfahren zur Prüfung der Prüfmaschinen beschrieben:
a)   Das direkte Verfahren, bei dem eine statische Einzelprüfung der kritischen Teile des Pendelschlagwerks unter Einbeziehung von Messungen durchgeführt wird um sicherzustellen, dass die Anforderungen dieses Teils von ISO 148 erfüllt werden. Die für Prüfung und Kalibrierung eingesetzten Geräte sind auf nationale Normale rückführbar. Direkte Verfahren werden angewendet, nachdem ein Pendelschlagwerk aufgestellt oder repariert wurde oder wenn nach dem indirekten Verfahren fehlerhafte Ergebnisse ermittelt werden;
b)   das indirekte Verfahren, bei dem eine dynamische Prüfung an Referenzproben durchgeführt wird, um den Anzeigebereich an verschiedenen Stellen der Skala zu überprüfen.
Ein Pendelschlagwerk entspricht erst dann diesem Teil von ISO 148, wenn Prüfungen sowohl nach dem direkten als auch nach dem indirekten Verfahren durchgeführt wurden und das Pendelschlagwerk den in den Abschnitten 6 und 7 festgelegten Anforderungen entspricht.
Die Anforderungen an die Referenzproben werden in ISO 148 3 festgelegt.
(....)

Matériaux métalliques - Essai de flexion par choc sur éprouvette Charpy - Partie 2: Vérification des machines d'essai (mouton-pendule) (ISO 148-2:2008)

L'ISO 148-2:2008 traite de la vérification des éléments des machines d'essai de flexion par choc (moutons-pendules). Elle s'applique aux machines ayant des couteaux de 2 mm ou de 8 mm utilisées pour les essais de flexion par choc effectués par exemple conformément à l'ISO 148-1.
Elle peut s'appliquer de manière analogue aux moutons-pendules de capacités ou de conception différentes.
Les machines de choc utilisées pour les essais des matériaux métalliques par des laboratoires industriels, généralistes ou de recherche conformément à l'ISO 148-2:2008 sont qualifiées de machines industrielles. Celles répondant à des exigences plus contraignantes sont qualifiées de machines de référence. Les exigences relatives à la vérification des machines de référence sont fixées dans l'ISO 148-3.
L'ISO 148-2:2008 décrit deux méthodes de vérification: une méthode directe et une méthode indirecte.

Kovinski materiali - Udarni preskus po Charpyju - 2. del: Preverjanje preskusnih naprav (ISO 148-2:2008)

General Information

Status
Withdrawn
Publication Date
14-Dec-2008
Withdrawal Date
22-Nov-2016
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
23-Nov-2016

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SLOVENSKI STANDARD
SIST EN ISO 148-2:2009
01-april-2009
1DGRPHãþD
SIST EN 10045-2:1996
SIST EN 10045-2:1996/AC1:1997
Kovinski materiali - Udarni preskus po Charpyju - 2. del: Preverjanje preskusnih
naprav (ISO 148-2:2008)

Metallic materials - Charpy pendulum impact test - Part 2: Verification of testing

machines (ISO 148-2:2008)

Metallische Werkstoffe - Kerbschlagbiegeversuch nach Charpy - Teil 2: Prüfung der

Prüfmaschinen (Pendelschlagwerke) (ISO 148-2:2008)

Matériaux métalliques - Essai de flexion par choc sur éprouvette Charpy - Partie 2:

Vérification des machines d'essai (mouton-pendule) (ISO 148-2:2008)
Ta slovenski standard je istoveten z: EN ISO 148-2:2008
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
SIST EN ISO 148-2:2009 en,fr

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

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SIST EN ISO 148-2:2009
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SIST EN ISO 148-2:2009
EUROPEAN STANDARD
EN ISO 148-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 77.040.10
English Version
Metallic materials - Charpy pendulum impact test - Part 2:
Verification of testing machines (ISO 148-2:2008)

Matériaux métalliques - Essai de flexion par choc sur Metallische Werkstoffe - Kerbschlagbiegeversuch nach

éprouvette Charpy - Partie 2: Vérification des machines Charpy - Teil 2: Prüfung der Prüfmaschinen

d'essai (mouton-pendule) (ISO 148-2:2008) (Pendelschlagwerke) (ISO 148-2:2008)
This European Standard was approved by CEN on 19 November 2008.

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 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 Management Centre has the same status as the

official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 148-2:2008: E

worldwide for CEN national Members.
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SIST EN ISO 148-2:2009
EN ISO 148-2:2008 (E)
Contents Page

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

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SIST EN ISO 148-2:2009
EN ISO 148-2:2008 (E)
Foreword

This document (EN ISO 148-2:2008) has been prepared by Technical Committee ISO/TC 164 "Mechanical

testing of metals" in collaboration with Technical Committee ECISS/TC 1 "Steel - Mechanical testing" the

secretariat of which is held by AFNOR.

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 2009, and conflicting national standards shall be withdrawn at

the latest by June 2009.

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, 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 and the United Kingdom.
Endorsement notice

The text of ISO 148-2:2008 has been approved by CEN as a EN ISO 148-2:2008 without any modification.

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SIST EN ISO 148-2:2009
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SIST EN ISO 148-2:2009
INTERNATIONAL ISO
STANDARD 148-2
Second edition
2008-12-15
Metallic materials — Charpy pendulum
impact test —
Part 2:
Verification of testing machines
Matériaux métalliques — Essai de flexion par choc sur éprouvette
Charpy —
Partie 2: Vérification des machines d'essai (mouton-pendule)
Reference number
ISO 148-2:2008(E)
ISO 2008
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
PDF disclaimer

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© ISO 2008

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

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Published in Switzerland
ii © ISO 2008 – All rights reserved
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
Contents Page

Foreword............................................................................................................................................................ iv

Introduction ........................................................................................................................................................ v

1 Scope ..................................................................................................................................................... 1

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

3 Terms and definitions........................................................................................................................... 2

3.1 Definitions pertaining to the machine ................................................................................................ 2

3.2 Definitions pertaining to energy.......................................................................................................... 3

3.3 Definitions pertaining to test pieces................................................................................................... 4

4 Symbols and abbreviated terms ......................................................................................................... 4

5 Testing machine.................................................................................................................................... 6

6 Direct verification.................................................................................................................................. 6

6.1 General................................................................................................................................................... 6

6.2 Foundation/installation ........................................................................................................................ 6

6.3 Machine framework .............................................................................................................................. 6

6.4 Pendulum............................................................................................................................................... 7

6.5 Anvil and supports ............................................................................................................................. 11

6.6 Indicating equipment.......................................................................................................................... 11

7 Indirect verification by use of reference test pieces....................................................................... 12

7.1 Reference test pieces used ............................................................................................................... 12

7.2 Absorbed energy levels ..................................................................................................................... 12

7.3 Requirements for reference test pieces ........................................................................................... 12

7.4 Limited direct verification .................................................................................................................. 12

7.5 Bias and repeatability......................................................................................................................... 13

8 Frequency of verification ................................................................................................................... 13

9 Verification report............................................................................................................................... 14

9.1 General................................................................................................................................................. 14

9.2 Direct verification................................................................................................................................ 14

9.3 Indirect verification............................................................................................................................. 14

10 Uncertainty .......................................................................................................................................... 14

Annex A (informative) Measurement uncertainty of the result of the indirect verification of a

Charpy pendulum impact machine................................................................................................... 21

Annex B (informative) Measurement uncertainty of the results of the direct verification of a

Charpy pendulum impact testing machine ...................................................................................... 25

Annex C (informative) Direct method of verifying the geometric properties of pendulum impact

testing machines using a jig.............................................................................................................. 31

Bibliography ..................................................................................................................................................... 38

© ISO 2008 – All rights reserved iii
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SIST EN ISO 148-2:2009
ISO 148-2:2008(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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

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.

ISO 148-2 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee

SC 4, Toughness testing — Fracture (F), Pendulum (P), Tear (T).

This second edition cancels and replaces the first edition (ISO 148-2:1998), which has been technically

revised.

ISO 148 consists of the following parts, under the general title Metallic materials — Charpy pendulum impact

test:
⎯ Part 1: Test method
⎯ Part 2: Verification of testing machines

⎯ Part 3: Preparation and characterization of Charpy V-notch test pieces for indirect verification of

pendulum impact machines
iv © ISO 2008 – All rights reserved
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
Introduction

The suitability of a pendulum impact testing machine for acceptance testing of metallic materials has usually

been based on a calibration of its scale and verification of compliance with specified dimensions, such as the

shape and spacing of the anvils supporting the specimen. The scale calibration is commonly verified by

measuring the mass of the pendulum and its elevation at various scale readings. This procedure for

evaluation of machines had the distinct advantage of requiring only measurements of quantities that could be

traced to national standards. The objective nature of these traceable measurements minimized the necessity

for arbitration regarding the suitability of the machines for material acceptance tests.

However, sometimes two machines that had been evaluated by the direct-verification procedures described

above, and which met all dimensional requirements, were found to give significantly different impact values

when testing test pieces of the same material. This difference was commercially important when values

obtained using one machine met the material specification, while the values obtained using the other machine

did not. To avoid such disagreements, some purchasers of materials added the requirement that all pendulum

impact testing machines used for acceptance testing of material sold to them must be indirectly verified by

testing reference test pieces supplied by them. A machine was considered acceptable only if the values

obtained using the machine agreed, within specified limits, with the value furnished with the reference test

pieces.
© ISO 2008 – All rights reserved v
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SIST EN ISO 148-2:2009
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SIST EN ISO 148-2:2009
INTERNATIONAL STANDARD ISO 148-2:2008(E)
Metallic materials — Charpy pendulum impact test —
Part 2:
Verification of testing machines
1 Scope

This part of ISO 148 covers the verification of the constructional elements of pendulum-type impact testing

machines. It is applicable to machines with 2 mm or 8 mm strikers used for pendulum impact tests carried out,

for instance, in accordance with ISO 148-1.

It can analogously be applied to pendulum impact testing machines of various capacities and of different

design.

Impact machines used for industrial, general or research laboratory testing of metallic materials in accordance

with this part of ISO 148 are referred to as industrial machines. Those with more stringent requirements are

referred to as reference machines. Specifications for the verification of reference machines are found in

ISO 148-3.
This part of ISO 148 describes two methods of verification.

a) The direct method, which is static in nature, involves measurement of the critical parts of the machine to

ensure that it meets the requirements of this part of ISO 148. Instruments used for the verification and

calibration are traceable to national standards. Direct methods are used when a machine is being

installed or repaired, or if the indirect method gives a non-conforming result.

b) The indirect method, which is dynamic in nature, uses reference test pieces to verify points on the

measuring scale.

A pendulum impact testing machine is not in compliance with this part of ISO 148 until it has been verified by

both the direct and indirect methods and meets the requirements of Clauses 6 and 7.

The requirements for the reference test pieces are found in ISO 148-3.

This part of ISO 148 takes into account the total energy absorbed in fracturing the test piece using an indirect

method. This total absorbed energy consists of
⎯ the energy needed to break the test piece itself, and

⎯ the internal energy losses of the pendulum impact testing machine performing the first half-cycle swing

from the initial position.
NOTE Internal energy losses are due to

⎯ air resistance, friction of the bearings of the rotation axis and of the indicating pointer of the pendulum which can

be determined by the direct method (see 6.4.5), and

⎯ shock of the foundation, vibration of the frame and pendulum for which no suitable measuring methods and

apparatus have been developed.
© ISO 2008 – All rights reserved 1
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 148-1, Metallic materials — Charpy pendulum impact test — Part 1: Test method

ISO 148-3, Metallic materials — Charpy pendulum impact test — Part 3: Preparation and characterization of

Charpy V-notch test pieces for indirect verification of pendulum impact machines
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Definitions pertaining to the machine
3.1.1
anvil

portion of the machine that serves to properly position the test piece for impact with respect to the striker and

the test piece supports, and supports the test piece under the force of the strike

3.1.2
base

that part of the framework of the machine located below the horizontal plane of the supports

3.1.3
centre of percussion

that point in a body at which, on striking a blow, the percussive action is the same as if the whole mass of the

body were concentrated at the point

NOTE When a simple pendulum delivers a blow along a horizontal line passing through the centre of percussion,

there is no resulting horizontal reaction at the axis of rotation.
See Figure 4.
3.1.4
centre of strike

that point on the striking edge of the pendulum at which, in the free hanging position of the pendulum, the

vertical edge of the striker meets the upper horizontal plane of a test piece of half standard height (i.e. 5 mm)

or equivalent gauge bar resting on the test piece supports
See Figure 4.
3.1.5
industrial machine

pendulum impact machine used for industrial, general, or most research-laboratory testing of metallic

materials
NOTE 1 These machines are not used to establish reference values.

NOTE 2 Industrial machines are verified using the procedures described in this part of ISO 148.

3.1.6
reference machine

pendulum impact testing machine used to determine certified values for batches of reference test pieces

2 © ISO 2008 – All rights reserved
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
3.1.7
striker
portion of the pendulum that contacts the test piece

NOTE The edge that actually contacts the test piece has a radius of 2 mm (the 2 mm striker) or a radius of 8 mm (the

8 mm striker).
See Figure 2.
3.1.8
test piece supports

portion of the machine that serves to properly position the test piece for impact with respect to the centre of

percussion of the pendulum, the striker and the anvils
See Figures 2 and 3.
3.2 Definitions pertaining to energy
3.2.1
total absorbed energy

total absorbed energy required to break a test piece with a pendulum impact testing machine, which is not

corrected for any losses of energy

NOTE It is equal to the difference in the potential energy from the starting position of the pendulum to the end of the

first half swing during which the test piece is broken (see 6.3).
3.2.2
initial potential energy
potential energy

difference between the potential energy of the pendulum hammer prior to its release for the impact test, and

the potential energy of the pendulum hammer at the position of impact, as determined by direct verification

NOTE See 6.4.2.
3.2.3
absorbed energy

energy required to break a test piece with a pendulum impact testing machine, after correction for friction

NOTE The letter V or U is used to indicate the notch geometry, that is KV or KU. The number 2 or 8 is used as a

subscript to indicate striker radius, for example KV .
3.2.4
calculated energy
calc

energy calculated from values of angle, length, and force measured during direct verification

3.2.5
nominal initial potential energy
nominal energy
energy assigned by the manufacturer of the pendulum impact testing machine
3.2.6
indicated absorbed energy

energy indicated by the display/dial of the testing machine, which may or may not need to be corrected for

friction to determine absorbed energy, K
© ISO 2008 – All rights reserved 3
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
3.2.7
reference absorbed energy

certified value of absorbed energy assigned to the test pieces used to verify the performance of pendulum

impact machines
3.3 Definitions pertaining to test pieces
3.3.1
height
distance between the notched face and the opposite face
3.3.2
width
dimension perpendicular to the height that is parallel to the notch
3.3.3
length
largest dimension perpendicular to the notch
3.3.4
reference test piece

impact test piece used to verify the suitability of pendulum impact testing machines by comparing the

indicated absorbed energy measured by that machine to the reference absorbed energy associated with the

test pieces
NOTE Reference test pieces are prepared in accordance with ISO 148-3.
4 Symbols and abbreviated terms

For the purposes of this document, the symbols and abbreviated terms given in Table 1 are applicable.

Table 1 — Symbols/abbreviated terms and their designations and units
Symbol/
abbreviated Unit Designation
term

B J Bias of the pendulum impact machine as determined through indirect verification

b J Repeatability
F N Force exerted by the pendulum when measured at a distance of l
F N Force exerted by the pendulum due to gravity
g Acceleration due to gravity
m/s
GUM — Guide to the expression of uncertainty in measurement
h m Height of fall of pendulum
H m Height of rise of pendulum
ISO — International Organization for Standardization

KV J Absorbed energy as measured in accordance with ISO 148 on a V-notched sample

KV J Certified KV value of the reference material used in the indirect verification

KV J Mean KV value of the reference test pieces tested for indirect verification
K J Nominal initial potential energy (nominal energy)
K J Initial potential energy (potential energy)
K J Reference absorbed energy of a set of Charpy reference test pieces
4 © ISO 2008 – All rights reserved
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
Table 1 (continued)
Symbol/
abbreviated Unit Designation
term
Absorbed energy (expressed as KV , KV , KU , KU , to identify specific notch
2 8 2 8
K J
geometries and striker radii)
K J Total absorbed energy
K J Indicated absorbed energy
K J Calculated energy
calc

Indicated absorbed energy or angle of rise when the machine is operated in the normal

K or b J or degree
1 1
manner without a test piece in position

Indicated absorbed energy or angle of rise when the machine is operated in the normal

K or b J or degree
2 2

manner without a test piece in position and without resetting the indication mechanism

Indicated absorbed energy or angle of rise after 11 half swings when the machine is

K or b J or degree operated in the normal manner without a test piece in position and without resetting the

3 3
indication mechanism

Distance to centre of test piece (centre of striker) from the axis of rotation (length of

l m
pendulum)
l m Distance to the centre of percussion from the axis of rotation

l m Distance to the point of application of the force F from the axis of rotation

M N·m Moment equal to the product Fl

Number of reference samples tested for the indirect verification of a pendulum impact

n —
testing machine
p J Absorbed energy loss caused by pointer friction
p′ J Absorbed energy loss caused by bearing friction and air resistance
p J Correction of absorbed energy losses for an angle of swing b
r J Resolution of the pendulum scale
RM — Reference material
s J Standard deviation of the KV values obtained on n reference samples
V V
S J Bias in the scale mechanism
t s Period of the pendulum
T s Total time for 100 swings of the pendulum
T s Maximum value of T
max
T s Minimum value of T
min
uK()V J Standard uncertainty of KV
u(B ) J Standard uncertainty contribution from bias
u(F) J Standard uncertainty of the measured force, F
u(F ) J Standard uncertainty of the force transducer
std
u(r) J Standard uncertainty contribution from resolution

Standard uncertainty of the certified value of the reference material used for the

u J
indirect verification
u J Standard uncertainty of the indirect verification result
a degree Angle of fall of the pendulum
b degree Angle of rise of the pendulum
ν — Degrees of freedom corresponding to u(B )
B V
ν — Degrees of freedom corresponding to u
V V
ν — Degrees of freedom corresponding to u
RM RM
See Figure 4.
© ISO 2008 – All rights reserved 5
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
5 Testing machine

A pendulum impact testing machine consists of the following parts (see Figures 1 to 3):

a) foundation/installation;

b) machine framework — the structure supporting the pendulum, excluding the foundation;

c) pendulum, including the hammer;
d) anvils and supports (see Figures 2 and 3);

e) indicating equipment for the absorbed energy (e.g. scale and friction pointer or electronic readout device).

6 Direct verification
6.1 General

Direct verification of the machine involves the inspection of the following items:

a) foundation/installation;
b) machine framework;
c) pendulum, including the hammer and the striker;
d) anvils and supports;
e) indicating equipment.
6.2 Foundation/installation

6.2.1 The foundation to which the machine is fixed and the method(s) of fixing the machine to the

foundation are of utmost importance.

6.2.2 Inspection of the machine foundation can usually not be made once the machine has been installed;

thus, documentation made at the time of installation shall be produced to provide assurance that the mass of

the foundation is not less than 40 times that of the pendulum.
6.2.3 Inspection of the installed machine shall consist of the following:

a) ensuring that the bolts are torqued to the value specified by the machine manufacturer. The torque value

shall be noted in the document provided by the manufacturer of the machine (see 6.2.1). If other

mounting arrangements are used or selected by an end user, equivalency shall be demonstrated;

b) ensuring that the machine is not subject to external vibrations transmitted through the foundation at the

time of the impact test.

NOTE This can be accomplished, for example, by placing a small container of water on any convenient location on

the machine framework. The absence of ripples on the water surface indicates that this requirement has been met.

6.3 Machine framework

6.3.1 Inspection of the machine framework (see Figure 1) shall consist of determining the following items:

a) free position of the pendulum;
b) location of the pendulum in relation to the supports;
c) transverse and radial play of the pendulum bearings;
d) clearance between the hammer and the framework.
6 © ISO 2008 – All rights reserved
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SIST EN ISO 148-2:2009
ISO 148-2:2008(E)
Machines manufactured after the original publication date of t
...

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