1859 OSI NTERNATIONAL STANDARD Information processing -- Unrecorded magnetic tapes for interchange instrumentation applications --- General dimensional requirements First edition - 1973-12-01 ISO 1859-1973 (E) UDC 681.327.64 Ref. No. ISO 1859-1973 (E) Descriptors : data processing, data storage devices, magnetic tapes, dimensions. Price based on 2 pages Not for Resale FOREWORD ISo (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through iSO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up 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. Draft International Standards adopted by the Technicai Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the ISo Council. Prior to 1972, the results of the work of the Technical Committees were published as Iso Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 97, Computers and information processing, has reviewed ISO Recommendation R 1859-1971 and found it technically suitable for transformation. International Standard ISO 1859 therefore replaces ISO Recommendation R 1859-1971, which was approved by the Member Bodies of the following countries : Australia Japan Sweden Belgium New Zealand Switzerland Portugal Czechoslovakia Thailand France Romania United Kingdom Greece South Africa, Rep. of U.S.A. Italy Spain U.S.S.R. The Member Body of the following expressed disapproval of the country Recommendation on technical grounds : Germany* Subsequently, this Member Body approved the Recommendation. @ International Organization for Standardization, 1973 : Printed in Switzerland CopyrightIntemational Organizationfor Standardization ted without license from IHS Not for Resale INTERNATIONAL STANDARD ISO 1859-1973 (E) Information processing -- Unrecorded magnetic tapes for interchange instrumentation applications - General dimensional requirements 1 SCOPE AND FIELD OF APPLICATION 4.2 The tape shall be wound with the magnetic coated surface facing the hub of the reel. This International Standard specifies the materials, the tape wind, and the dimensions of magnetic tape used in interchange instrumentation applications. NOTE - Physical properties and test methods are specified in ISO 2690. 5 DIMENSIONS 2 REFERENCES ISO/R 1858, General purpose hubs and reels, with 76 mm 5.1 Standard widths (3 in) centrehole, for magnetic tape used in interchange The standard widths shalt be as listed in table 1. instrumen tation applications. ISO/R 1860, Precision reels for magnetic tape used in 5.2 Thickness interchange instrumentation application. IS0 2690, Unrecorded magnetic tapes for instrumentation Maximum total thickness is controiled by standard ree! applications - Physical properties and test methods. dimensions, length and E value. NOTE - The maximum total thickness of the base plus the coating 3 MATERIALS shall not exceed 0,055 mm (0.002 2 in). The nominal base thickness is given in table 2. The tape shall consist of a suitable, continuous and splice-free base material coated on one side with a durable, yet flexible layer of ferromagnetic material. 5.3 Length Tape shall be supplied in the minimum lengths given in 4 TAPE WIND table 2. 4.1 The tape shall be wound on hubs or reels complying 5.4 E value with the specifications for precision reels or general purpose hubs and reels stated in ISO/R 1860 and ISO/R 1858. The minimum E value shall be 2,5 mm (0.10 in). (The E value is the radial distance by which the reei flanges extend NOTE- Smaller reels with 8 mm (5/16 in) centreholes are under beyond the outermost layer of the tape.