Ref. No.: I S O / R l
UDC 536.5.081 : 531.71
- 1951 (E)
IS0
INTERNATIONAL ORGANIZATION
FOR S T A N D A R D l Z A T l O N
I S O R E C O M M E N D AT 1.0N
R I
iTeh
STANDARD PREVIEW
STANDARD REFERENCE TEMPERATURE
(standards.iteh.ai)
FOR INDUSTRIAL
LENGTH MEASUREMENTS
ISO/R 1:1951
1st ED IT10 N
https://standards.iteh.ai/catalog/standards/sist/08b71af7-6fce-4bda-92e5-060fe2a82bb6/iso-r-1February
1954
1951
COPYRIGHT RESERVED
The copyright of I S 0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
FOREWORD
A standard reference temperature for industrial length measurements was
considered by the International Organization for Standardization through its
Technical Committee ISO/TC 3 - Limits and Fits, the Secretariat of which
is held by the Association Française de Normalisation.
This Committee examined ISA l) Bulletin 24
with a view to adopting or revising it.
-
Reference Temperafure
During its first meeting, held on 4 and 5 July 1949 in Paris, the Technical
Committee ISO/TC 3 unanimously decided, without discussion, to adopt ISA
Bulletin 24 as a Draft I S 0 Recommendation.
The following Member Bodies took part in this meeting:
Austria, Belgium, Czechoslovakia, Finland, France, Hungary, Italy, Netherlands,
Norway, Poland, Portugal, Sweden, Switzerland, United Kingdom, U.S.S.R.
On 10 January 1950, the Draft I S 0 Recommendation proposed by the
Technical Committee ISO/TC 3 was submitted to all the Member Bodies of ISO.
iTeh STANDARD PREVIEW
(standards.iteh.ai)
The wording of this Draft was revised as a result of comments received.
The text of the revision is substantially the same as that of the present I S 0
Recommendation and i t was distributed to the Member Bodies on 28 February
1951.
This Draft I S 0 Recommendation was approved by the following 26 Member
ISO/R 1:1951
Bodies :
https://standards.iteh.ai/catalog/standards/sist/08b71af7-6fce-4bda-92e5-060fe2a82bb6/iso-r-1Australia
Hungary
Poland
1951
Austria
India
Portugal
Belgium
Israel
Rumania
Canada
Italy
Sweden
Chile
Mexico
Switzerland
Czechoslovakia
Netherlands
Union of South Africa
Denmark
New Zealand
United Kingdom
Finland
Norway
U.S.S.R.
France
Yugoslavia
A t its Meeting in Geneva in July 1951, the I S 0 Council unanimously
accepted the Draft I S 0 Recommendation as an I S 0 Recommendation (Resolution No. 4, Council July 1951).
I) Published by the former International Federation of the National Standardizing
Associations (ISA).
-2-
ISOIR1
I S 0 Recommendation
R I
- 1951 (E)
July 1951
STANDARD REFERENCE TEMPERATURE
FOR INDUSTRIAL LENGTH MEASUREMENTS
iTeh STANDARD PREVIEW
(standards.iteh.ai)
The standard reference temperature for industrial length
measurements is fixed at 20 "C.l)
ISO/R 1:1951
https://standards.iteh.ai/catalog/standards/sist/08b71af7-6fce-4bda-92e5-060fe2a82bb6/iso-r-11951
l)
The fixing of the reference temperature of 20 O C signifies that all length
measurements referred to this temperature have at 20 O C the exact
length corresponding to the international Prototype a t O OC, i.e. a metre
gauge with the indication: reference temperature 20 OC has at 20 O C the
same length as the international Prototype at O OC.
-3-
-7
0
