EN 61254:1994

SLOVENSKI STANDARD
01-januar-1998
Electric shavers for household use - Methods for measuring the performance (IEC
1254:1993)
Electric shavers for household use - Methods for measuring the performance
Elektrische Haushalt-Rasierer Prüfverfahren zur Bestimmung der
Gebrauchseigenschaften
Rasoirs électriques à usage domestique - Méthodes de mesure de l'aptitude à la fonction
Ta slovenski standard je istoveten z: EN 61254:1994
ICS:
97.170 Oprema za nego telesa Body care equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61254
NORME EUROPEENNE
EUROPBISCHE NORM April 1994
UDC 646.72:687.53.052:672.715.3
Descriptors: Household electrical appliances, electric shavers,
performance, characteristics, measurements
ENGLISH VERSION
Electric shavers for household use - Methods
for measuring the performance
(IEC 1254:1993)
Rasoirs blectriques A usage Elektrische Haushalt-Rasierer
domestique - Mbthodes de mesure Prufverfahren zur Bestimmung
de l'aptitude h la fonction der Gebrauchseigenschaften
(CEI 1254:1993) (IEC 1254:1993)
This European Standard was approved by CENELEC on i994-03-08.
CENELEC 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 Central Secretariat or to any CENELEC 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 CENELEC member into its own language and notified to the Central Secretariat
has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comitb Europben de Normalisation Electrotechnique
Europaisches Komitee fur Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B-1050 Brussels
@ 1994 Copyright reserved to CENELEC members
Ref. No. EN 61254:1994 E
Page 2
FOREWORD
The text of document 59(C0)33, as prepared by IEC Technical
Committee 59: Performance of household electrical appliances, was
submitted to the IEC-CENELEC parallel vote in July 1993.
The reference document was approved by CENELEC as EN 61254 on
8 March 1994.
NOTE: Sweden has no obligation to implement this European
Standard .
The following dates were fixed:
- latest date of publication of
an identical national standard (dop) 1995-03-15
- latest date of withdrawal of
conflicting national standards (dow) 1995-03-15
For products which have complied with the relevant national standard
before 1995-03-15, as shown by the manufacturer or by a certification
body, this previous standard may continue to apply for production
until 2000-03-15.
Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given only for information.
In this standard, annexes A, B, C, and D are normative and annexes E
and F are informative.
ENDORSEMENT NOTICE
The text of the International Standard IEC 1254:1993 was approved by
CENELEC as a European Standard without any modification.

NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STANDARD
First edition
1993-12
Rasoirs électriques à usage domestique —
Méthodes de mesure de l'aptitude à la fonction
Electric shavers for household use —
Methods for measuring the performance
© IEC 1993 Droits de reproduction
réservés — Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
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PRICE CODE
International Electrotechnical Commission
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Pour prix, voir catalogue en
•
For price, see current catalogue

1254 ©IEC: 1993 - 3 -
CONTENTS
Page
FOREWORD 5
INTRODUCTION 7
Clause
1 Scope 9
2 Definitions 9
3 List of measurements 9
4 General conditions for measurements 11
5 Measuring methods for dimensions 11
5.1 Overall dimensions 11
5.2 Mass 11
5.3 Length of the supply cord 11
6 Determination of the operation time per charge 11
6.1 Operation time per battery charge 11
6.2 Operation time per primary battery 11
7 Shaving performance 13
7.1 Composition of the test panels 13
7.2 Test duration and test procedure
7.3 Distribution of the shavers 15
7.4 17
Statistical analysis
7.5 Final ranking 17
8 Trimmer pe rf 19
ormance
9 Gravimetric analysis of the difference in closeness of shave 19
9.1 Composition of the test panels 19
9.2 Test procedure and distribution scheme 19
9.3 Conversion from mass into average residual hair-stubble length
9.4 Statistical analysis 25
Figure 1 - Schematic presentation of the test procedure 27
Annexes
A Questionnaires 29
B 41
Instructions to the testers
C Distribution scheme 45
D Possible variations in the testing scheme 51
E Application of the method 53
F Bibliography 90
1254 © IEC: 1993 - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTRIC SHAVERS FOR HOUSEHOLD USE -
Methods for measuring the performance
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2)
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3) They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4)
In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
International Standard IEC 1254 has been prepared by IEC technical committee 59:
Performance of household electrical appliances.
The text of this standard is based on the following documents:
DIS Report on voting
59(CO)33
59(CO)35
Full information on the voting for the approval of this standard can be found in the repo
rt
on voting indicated in the above table.
Annexes A, B, C and D form an integral part of this standard.
Annexes E and F are for information only.

1254 © IEC: 1993 – 7 –
INTRODUCTION
Determination of the performance characteristics of dry shavers is usually based on the
subjective analysis of a test panel. The results of such a test programme may be affected
by prolonged use of a certain type of shaver prior to test and subsequent use of a
particular shaver system during a test. Intrusive advertising campaigns may have an
influence as well.
In the test method of this standard such problems are largely overcome by taking the
following measures:
a) Care is taken to ensure that different shaver systems (rotary and vibratory) are
represented by equal numbers of shaver users.
b)
To maintain the balance between the shaver systems throughout the entire test
period, each tester uses his own shaver prior to using each test shaver.
c) Conclusions on differences between shavers are based on statistical analysis,
taking into account possible user-effects (see point a).
NOTE - Whereas the performance data are assessed on a non -comparative basis, the results should be
evaluated by comparison.
1254 ©IEC: 1993 - 9 -
ELECTRIC
SHAVERS FOR HOUSEHOLD USE -
Methods for measuring the performance
1 Scope
This International Standard states and defines the principal pe rformance characteristics
for men's electric shavers, which are of interest to the user, and describes standard
methods for measuring these characteristics.
This standard is not concerned with safety or with pe rformance requirements.
2 Definitions
2.1 mains shaver:
Shaver which can be operated directly from the mains supply.
NOTE - The shaver may also be suitable for an additional power source.
2.2
rechargeable shaver: Shaver which is supplied by a rechargeable battery belonging
to it.
NOTE - A rechargeable shaver may
also be operated directly from the mains supply.
2.3 battery shaver:
Shaver which is supplied by primary batteries.
2.4 car shaver:
Shaver which is supplied by a car or boat battery.
2.5 rotary shaver:
Shaver with round shaving head(s) and usually rotating cutters.
2.6 vibratory shaver:
Shaver with linear shaving head(s) and usually vibrating cutters.
2.7 trimmer:
Accessory incorporated in the shaver, to groom particular facial hair, e.g.,
moustache, beard or side whiskers.
3 List of measurements
Perf
ormance is determined by carrying out the following measurements:
Overall dimensions (5.1).
- Mass (5.2).
- Length of the supply cord (5.3).
- Operation time per battery charge (6.1).
-
Operation time per primary battery (for battery shavers only) (6.2).
- Shaving pe rformance (clause 7).
- Trimmer pe rf
ormance (clause 8).
Gravimetric analysis of the difference in_closeness of shave (clause 9).

1254 © IEC: 1993 - 11 -
4 General conditions for measurements
Unless otherwise specified, the measurements are made under the following conditions:
- Ambient temperature: 20 °C ± 5 °C.
- Supply voltage: rated voltage.
5 Measuring methods for dimensions
5.1 Overall dimensions
The maximum overall dimensions of the shaver - height, length and width or diameter -
are measured and indicated in millimetres. Any fixed projection on the appliance itself is
taken into account, including control knobs and the cord guard of any supply cord.
Movable parts such as the trimmer are in the closed position.
The overall dimensions of the storage case are also measured.
5.2
Mass
The mass of the shaver in use is measured and indicated in grams to the nearest five
grams.
NOTE - "Shaver in use" means without protection cap but with batteries or supply cord, as appropriate.
5.3 Length of the supply cord
The distance between the entry points into the shaver and the plug, including any cord
guard, is measured. Coiled cords are stretched with a pull of approximately 1 daN, and
indicated in metres rounded down to the nearest 0,05 m.
6 Determination of the operation time per charge
6.1 Operation time per battery charge
After being fully charged and discharged, the batteries are fully charged according to the
instructions for use. The shaver is operated for periods of 5 min, separated by intervals
of 24 h. The test is terminated when the cell voltage drops below 1,05 V with the shaver
running in free air. The operation time is expressed in minutes.
NOTE - The operation time resulting from this test procedure will be higher than the time resulting from
practical use.
6.2 Operation time per primary battery
The shaver is operated as specified in 6.1 using new batteries. The test is terminated
when the cell voltage drops to approximately 0,9 V with the shaver running in free air. The
operation time is expressed in minutes.
NOTE - The operation time resulting from this test procedure will be higher than the time resulting from
practical use.
1254 © IEC: 1993
— 13 —
Shaving performance
7.1 Composition of the test panels
Each panel is to be composed so that it is reasonably representative of the adult male
population of the country in which the test is performed, particular attention being paid to
hair density, rate of beard growth, toughness of the beard, sensitivity towards skin
irritation, and the time taken to shave.
The members of the test panels should not be influenced by preconceived ideas.
Subpanels of equal size should be formed, each subpanel representing one of the two
basic electric shaver systems:
— rotary type shaver users (ROTA panel);
—
vibratory type shaver users (VIBRA panel).
For statistical reasons, the number t
of testers in each of the above subpanels should be
at least 12.
NOTES
1 Whereas some deviation of the test panel composition from the real situation in a count ry will not have
a noticeable influence on the results, it is essential that subpanels have comparable compositions.
2 A subpanel composed of testers who use wetshavers (razor blades) may be considered.
7.2 Test duration and test procedure
7.2.1
Test duration
The test period is preceded by a two week introdu
...