EN 61255:1994

SLOVENSKI STANDARD
01-januar-1998
Houshold electric heating pads - Methods for measuring performance (IEC
1255:1994)
Household electric heating pads - Methods for measuring performance (IEC 1255:1994)
Elektrische Haushalt-Heizkissen - Prüfung zur Bestimmung der Gebrauchseigenschaften
Coussins chauffants électriques pour usage domestique - Méthodes de mesure de
l'aptitude à la fonction
Ta slovenski standard je istoveten z: EN 61255:1994
ICS:
97.030 (OHNWULþQLDSDUDWL]DGRPQD Domestic electrical
VSORãQR appliances in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Première édition
STAN
DARD
First edition
1994-06
Coussins chauffants électriques pour usage
domestique —
Méthodes de mesure de l'aptitude à la fonction
Household electric heating pads —
Methods for measuring performance
© IEC 1994 Droits de reproduction réservés —
Copyright - all rights reserved
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1255 ©IEC:1994 _ 3 _
CONTENTS
Page
FOREWORD 5
Clause
1 Scope 7
2 Normative reference 7
3 Definitions 7
4 Classification of heating pads 9
5 List of measurements 9
6 General conditions for measurements 9
7 Dimensions and mass 11
8 Evenness of temperature 13
9 Heating-up time 15
10 Cyclic variation 15
Figures
1 Grid for the temperature measurements 16
2 Layout for grids 17
3 Layout for copper disks 17
_ 5 _
1255 ©IEC:1994
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HOUSEHOLD ELECTRIC HEATING PADS -
METHODS FOR MEASURING 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 1255 has been prepared by sub-committee 59C: Heating
appliances, of IEC technical committee 59: Performance of household electrical appliances.
The text of this standard is based on the following documents:
DIS Report on voting
59C(CO)50 59C(CO)52
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.
In this standard, the following print types are used:
- test specifications: in italic type
— notes: in small roman type
- other text: in roman type
Words in bold in the text are defined in clause 3.

_ 7 _
1255 © I EC:1994
HOUSEHOLD ELECTRIC HEATING PADS -
METHODS FOR MEASURING PERFORMANCE
1 Scope
This standard applies to electric
heating pads for household use.
This standard defines the main performance characteristics of electric heating pads and
specifies methods for measuring these characteristics, for the information of users.
This standard does not specify values for performance characteristics.
NOTE - This standard does not deal with safety requirements (IEC 967*).
2 Normative reference
The following normative document contains provisions which, through reference in this
text, constitute provisions of this International Standard. At the time of publication, the
editions indicated were valid. All normative documents are subject to revision, and pa rties
to agreements based on this standard are encouraged to investigate the possibility of ap-
plying the most recent edition of the normative document indicated below. Members of IEC
and ISO maintain registers of currently valid International Standards.
ISO 2439:1980,
Polymeric materials, cellular flexible — Determination of hardness
(indentation technique).
3 Definitions
For the purposes of this standard, the following definitions apply:
3.1 heating pad: Appliance comprising a substantially flat flexible part having a
heated area,
measured on one face only, not exceeding 0,2 m 2 and which is designed for
the local application of heat to the human body.
3.2
flexible part: All layers of material forming the permanent enclosure of the
appliance together with the heating element, thermostats and all other current-carrying
pa rts contained therein.
NOTE - The flexible part
may be inside a detachable cover.
* IEC 967: 1988,
Safety of electrically heated blankets, pads and similar flexible heating appliances for household
use.
- 9 -
1255 ©IEC:1994
3.3 heated area: That area of the
flexible pa rt enclosed within the outer perimeter of
the heating element. It includes the flexible
part outside the perimeter up to a width equal
to 0,5 times the average distance between adjacent parallel runs of the heating element.
NOTES
...