1、BRITISH STANDARD BS EN 60094-4:1994 BS 6288-4: 1994 IEC 94-4:1986 Incorporating Amendment Nos. 1 and 2 Magnetic tape sound recording and reproducing systems Part 4: Mechanical magnetic tape properties The European Standard EN60094-4:1994 has the status of a British Standard UDC 681.846.7.083.8BSEN 6
2、0094-4:1994 This British Standard, having been prepared under the directionof the Electronic Equipment Standards Committeewas published underthe authority of the BoardofBSI and comes intoeffecton 23 December 1987 BSI 03-2000 The following BSI references relate to the work on this standard: Committee
3、 reference EEL/22 Draft for comment 86/31470 DC ISBN 0 580 16262 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Equipment Standards Committee (EEL/-) to Technical Committee EEL/22, upon which the following bodies were repre
4、sented: Association of Sound and Communications Engineers Ltd. British Broadcasting Corporation British Kinematograph, Sound and Television Society Council for Educational Technology for the United Kingdom Electronic Engineering Association Independent Television Companies Association Training and E
5、ducational Systems Testing Bureau Amendments issued since publication Amd. No. Date of issue Comments 8396 February 1995 8706 November 1995 Indicated by a sideline in the marginBSEN 60094-4:1994 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Tex
6、t of EN 60094-4 3 Publications referred to Inside back coverBSEN 60094-4:1994 ii BSI 03-2000 National foreword This British Standard has been prepared by Technical Committee EPL/60 and is the English language version of EN60094-4:1994 Magnetic tape sound recording and reproducing systems Part4: Mech
7、anical magnetic tape properties, together with its amendment A1: August1994, published by the European Committee for Electrotechnical Standardization (CENELEC), and supersedes Harmonization Document HD311.4S1:1988. It is identical with IEC94-4:1986 and its Amendment1: July1994, published by the Inte
8、rnational Electrotechnical Commission (IEC). The cross-reference of this standard as Part1 of the BS6288 series has been retained for ease of reference to other Parts of the series. BS 6288 consists currently of the following Parts: Part 1 (BSEN60094-1): Specification for general conditions and requ
9、irements; Part 2 (BSEN60094-2): Specification for calibration tapes; Part 3: Methods of measuring the characteristics of recording and reproducing equipment for sound on magnetic tape; Part 4 (BS EN 60094-4): Methods for measuring the mechanical characteristics of magnetic tape for analogue recordin
10、g; Part 5 (BS EN 60094-5): Specification for electrical magnetic tape properties; Part 6: Specification for reel-to-reel systems; Part 7 (BS EN 60094-7): Specification for cassettes for commercial tape records and domestic use; Part 8: Specification for eight-track magnetic tape cartridge for commer
11、cial tape records and domestic use; Part 9: Specification for magnetic tape cartridge for professional use; Part 10: Specification for time and address codes; Part 11: Guide to an address code for compact cassettes. In4.1 the words “IEC publication” should be read as “BSEN”. IEC 94-1:1981 has been h
12、armonized as EN60094-1:1993 and is implemented as BSEN60094-1, but has also retained its identity as BS6288-1:1994 for the present. Additional information. It is recommended that in5.1 the five measurements are taken at approximately2m intervals along the tape. Cross-references International Standar
13、d Corresponding British Standard IEC 94-1:1981 BS EN 60094 Magnetic tape sound recording and reproducing systems BS EN 60094-1:1994 Specification for general conditions and requirements BS 2782 Methods of testing plastics Part 3 Mechanical properties ISO 527-1:1993 a Method 321:1994 Determination of
14、 tensile properties. General principles ISO 527-2:1993 a Method 322:1994 Determination of tensile properties, test conditions for moulding and extrusion plastics ISO 4057:1986 BS ISO 4057:1986 Information processing. Data interchange on6,30mm (0.25in) magnetic tape cartridge,63bpmm (1600bpi) phase-e
15、ncoded a ISO R527 has been published as ISO527-1:1993 and ISO527-2:1993.BSEN 60094-4:1994 BSI 03-2000 iii It is recommended that the flat surface referred to in5.3 is manufactured from non-magnetic material. A British Standard does not purport to include all the necessary provisions of a contract. U
16、sers of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi toiv, theENtitle page, pages2 to14, an inside b
17、ack cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN60094-4 May 1994 + A1 August 1994 UDC 681.846.
18、7.083.8 Supersedes HD 311.4 S1:1988 Descriptors: Magnetic tape recording, sound recording and reproduction, mechanical property, method of measurement English version Magnetic tape sound recording and reproducing systems Part 4: Mechanical magnetic tape properties (includes amendment A1:1994) (IEC 9
19、4-4:1986) Systmes denregistrement et de lecture du son sur bandes magntiques Quatrime partie: Proprits mcaniques des bandes magntiques (inclut lamendement A1:1994) (CEI 94-4:1986) Systeme fr Tonaufzeichnung und -wiedergabe auf Magnetband Teil 4: Mechanische Eigenschaften von Magnetbndern (enthltnder
20、ungen A1:1994) (IEC 94-4:1986) This European Standard was approved by CENELEC on1993-12-08. 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-d
21、ate 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 unde
22、r 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, L
23、uxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Bru
24、ssels 1994 Copyright reserved to CENELEC members Ref. No. EN60094-4:1994 + A1:1994 EEN 60094-4:1994 BSI 03-2000 2 Foreword As a consequence of the IEC-CENELEC Agreement, HD311.4 S1:1988 (IEC94-4:1986) was submitted to the CENELEC voting procedure for conversion into a European Standard. The text of
25、the International Standard was approved by CENELEC as EN60094-4 on8 December1993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard,Annex ZA is normative. Foreword to amendment A1 The text of document 60A(CO)155, as prepared by Sub-
26、committee60A, Sound recording, of IECTechnical Committee60, Recording, was submitted to the IEC-CENELEC parallel vote in April1993. The reference document was approved by CENELEC as amendment A1 to EN60094-4 on8 December1993. The following dates were fixed: Contents Page Foreword 2 1 Scope 3 2 Objec
27、t 3 3 Standard atmospheric conditions for testing 3 4 Information to be supplied by the magnetic tape manufacturer 3 4.1 Recommended form for published data 3 5 Parameters to be measured 3 5.1 Tape width 3 5.2 Tape thickness 3 5.3 Static longitudinal curvature 4 5.4 Transverse cupping 4 5.5 Wavy edg
28、e 5 5.6 Longitudinal coiling 5 5.7 Electrical resistance of magnetic and back coating(s) 5 5.8 Layer-to-layer adhesion 6 5.9 Light transmittance 6 5.10 Tensile tests 6 5.11 Residual elongation 7 Annex ZA (normative) Other international publications quoted in this standard with the references of the
29、relevant European publications 13 Figure 1 Longitudinal coiling 5 Figure 2 Gauge for measuring static longitudinal curvature 8 Figure 3 Gauge for measurement of transverse cupping 9 Figure 4 Gauge for measurement of wavy edge 10 Figure 5 Test equipment to determine longitudinal coiling 11 Figure 6 J
30、ig for measurement of electrical resistance of coatings 12 Figure 7 Tape positioning device 7 Figure 8 Device for the optical measurement of transverse cupping 7 latest date of publication ofan identical national standard (dop) 1994-12-01 latest date of withdrawal ofconflicting national standards (d
31、ow) latest date of publication ofan identical national standard (dop) 1995-07-01 latest date of withdrawal ofconflicting national standards (dow) 1995-07-01EN 60094-4:1994 BSI 03-2000 3 1 Scope This standard applies to non-perforated magnetic tape used for professional and domestic analogue sound re
32、cording and reproduction. 2 Object The object of this standard is to list and define the methods of measurement and equipment necessary to determine the mechanical characteristics of magnetic recording tape. It will also enable users of magnetic tapes to compare technical product data of different m
33、anufacturers, produced in accordance with this standard. 3 Standard atmospheric conditions for testing Ambient temperature: 20 5 C Relative humidity: 60 15% The sample roll of tape shall be incubated for24h at the stated conditions before the test is commenced. 4 Information to be supplied by the ma
34、gnetic tape manufacturer Information supplied by the manufacturer shall fall into two distinct categories: a) mandatory information to be clearly shown in the presentation of technical data, indicated by the word “mandatory” on the right-hand side of the page, in this standard; b) optional informati
35、on which may be given at the discretion of the manufacturer, indicated by the word “optional” on the right-hand side of the page, in this standard. 4.1 Recommended form for published data Where data obtained in accordance with this standard or with any other IEC publication form part of publicity ma
36、terial, they should be clearly set apart and should be preceded by the following particulars: i) the number of the appropriate IEC publication; ii) makers name or trade mark; iii) makers type reference and/or description; iv) base material (a generic name is sufficient). 5 Parameters to be measured
37、5.1 Tape width (mandatory) Definition The tape width is the perpendicular distance between its longitudinal edges. Method The width of the tape, covered with a glass, is measured without tension at a minimum of five different positions along the tape using a calibrated microscope or profile projecto
38、r having an accuracy of at least2.54m. Result The tape width is the arithmetical average of the five measurements, and is expressed in millimetres. 5.2 Tape thickness 5.2.1 Total tape thickness (mandatory) Definition The total tape thickness is the overall thickness of the tape, and is composed of b
39、ase thickness, magnetic coating thickness and back coating thickness (if any). Method The total tape thickness shall be measured by means of a micrometer having an accuracy of at least0.54m. Ten measurements shall be made at intervals of approximately1m along the tape length. Result The total tape t
40、hickness is the arithmetical average of the ten measurement results, and is expressed in micrometres. 5.2.2 Magnetic coating thickness (optional) Definition The magnetic coating thickness is the total thickness of the magnetic layer(s) of a tape. Method The magnetic layer(s) shall be removed with a
41、suitable solvent, and the remaining tape thickness measured using a micrometer having an accuracy of at least0.54m. Ten measurements shall be made at intervals of approximately1m along the tape length. Result The magnetic coating thickness is calculated from the difference between the total tape thi
42、ckness (Sub-clause5.2.1) and the arithmetical average of the ten measurement results obtained from this Sub-clause5.2.2. It is expressed in micrometres. 5.2.3 Back coating thickness (optional) Definition The back coating thickness is the total thickness of any coating applied to the tape side opposi
43、te to that carrying the magnetic layer(s). Method The back coating layer shall be removed with a suitable solvent, and the remaining tape thickness measured using a micrometer having an accuracy of at least0.54m.EN 60094-4:1994 4 BSI 03-2000 Ten measurements shall be made at intervals of approximate
44、ly1m along the tape length. Result The back coating thickness is calculated from the difference between the total tape thickness (Sub-clause5.2.1) and the arithmetical average of the ten measurement results obtained from this Sub-clause5.2.3. It is expressed in micrometres. 5.2.4 Base thickness (opt
45、ional) Definition The base thickness is the thickness of the film carrying the magnetic and back coating (if any) layer(s). Method The magnetic and back coating (if any) layer(s) shall be removed with a suitable solvent, and the film thickness measured using a micrometer having an accuracy of at lea
46、st0.54m. Ten measurements shall be made at intervals of approximately1m along the tape length. Result The base thickness is the arithmetical average of the ten measurement results, and is expressed in micrometres. 5.3 Static longitudinal curvature (optional) Definition Static longitudinal curvature
47、is the deviation of one edge of unit length of tape from a straight line. Method Two tape samples are allowed to unroll and assume their natural curvature on a flat surface (seeFigure 2, page8). The flat surface shall consist of an anodized precision base plate mounted at an angle of1 to the horizon
48、tal plane. The surface contains a scale in millimetres and two engraved reference lines of1m in length which are perpendicular to the scale as shown inFigure 2. Theupper end of each reference line is referenced tooneedge of a groove, having the specified width forthe particular type of tape sample.
49、(See IEC Publication94-1: Magnetic Tape SoundRecording and Reproducing Systems, Part1: General Conditions and Requirements, Clause9). Two samples of tape having a length greater than1m are placed in the grooves, clamped and aligned with the reference lines. A precision roller is placed on the zero line and a section of both tapes is formed into a semicircle by hand. Both semicircles of tape are released and at the same time the roller is allowed to move in the direction indicated by the arrow inFigu
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