Reaffirmed 2018

NATIONAL FOREWORD

This Indian Standard (Part 1/Sec 51) which is identical with IEC 60793-1-51 : 2014 ‘Optical fibres - Part 1-51: Measurement methods and test procedures - Dry heat (steady state) tests’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Fibre Optics, Fibres, Cables and Devices Sectional Committee and approval of the Electronics and Information Technology Division Council.

This standard was first published in 2009 and was identical to IEC 60793-1-51 : 2001. This revision is being published to align it with the latest version of IEC 60793-1-51 : 2014.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and conventions are however not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.