ISO-10994-1992.pdf
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1、INTERNATIONAL STANDARD ISOIIEC 10994 First edition 1992-06-01 Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side - IS0 Type 303 Technologies de /information - khange de donnees sur carto
2、uche B disquette de 90 mm utilisant un enregistrement A modulation de frequence modifiee B 31 831 ftprad, 80 pistes par face - IS0 Type 303 Reference number ISO/IEC 10994: 1992(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical
3、Standards 1/9972545001 Not for Resale, 04/07/2007 03:32:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 10994:1992 (E) Contents Page Section 1 - General 1 scope 2 Conformance 3 Normative references 4 Definitions 4.1 Average Signal Amplitude 4.2 case 4.3 direction
4、 of rotation 4.4 disk 4.5 eraseability 4.6 formatting 4.7 hub 4.8 in-contact 4.9 Index 4.10 initialization 4.11 line of access 4.12 liner 4.13 Master Standard Reference Flexible Disk Cartridge 4.14 Reference Erase Field 4.15 Reference Field 4.16 Secondary Standard Reference Flexible Disk Cartridge 4
5、.17 shutter 4.18 Side 4.19 Standard Reference Amplitude 4.20 Test Erase Current 4.21 Test Recording Current 4.22 Typical Field 5 General description 5.1 Drawings 5.2 Main elements 5.3 Description Section 2 - Environments, mechanical and physical characteristics 6 General requirements 6.1 Environment
6、 and transportation 6.1.1 Testing environment 6.1.2 Operating environment 6.1.3 Storage environment 6.1.4 Transportation 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 0 ISO/IEC 1992 All rights reserved. No part of this publication may be reproduced or utilized in any fo
7、rm or by any means, electronic or mechanical, including photocopylng and microfilm, without permission In writing from the publisher. ISO/IEC Copyright Office l Case Postale 56 l CH-1211 Geneve 20 l Swltzerland Printed In Switzerland ii Copyright International Organization for Standardization Provid
8、ed by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/07/2007 03:32:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 10994:1992 (E) 6.2 Materials 6.2.1 Case 6.2.2 Liner 6.2.3 Disk 6.2.4 Hub 7 Dimensional characteristics
9、 7.1 Case 7.1.1 Shape 7.1.2 Thickness 7.1.3 Hub access hole 7.1.4 Locating holes 7.1.5 Label area 7.1.6 Head windows 7.1.7 Write-inhibit hole 7.1.8 Identification hole 7.1.9 Profile of the shutter edge of the case 7.1.10 Shutter 7.2 Liner 7.3 Disk 7.3.1 Diameter 7.3.2 Thickness 7.4 Hub 7.4.1 Dimensi
10、ons 7.4.2 Hub orientation holes 7.5 Optional handling notches 7.6 Interface between cartridge and drive 7.7 Compliance 8 Physical characteristics 8.1 Flammability 8.2 Coefficient of linear thermal expansion of the disk 8.3 Coefficient of linear hygroscopic expansion of the disk 8.4 Torque 8.4.1 Star
11、ting torque 8.4.2 Running torque without heads loaded Section 3 - Unrecorded flexible disk cartridge 9 Magnetic characteristics 9.1 Recording area 9.2 Track geometry 9.2.1 Number of tracks 9.2.2 Width of tracks 9.2.3 Track location 9.2.4 Track number 9.3 Functional testing 9.3.1 Surface tests 9.3.2
12、Track quality tests 9.3.3 Rejection criterion S - Figure 8 shows Side 1; - Figure 9 shows at a larger scale the upper part of Side 0 without shutter; - Figure 10 shows the disk with hub; - Figure 11 shows the interface between the cartridge and the drive. 5.2 Main elements The main elements of the f
13、lexible disk cartridge are - the disk, - the liner, - the case. 5.3 Description The cartridge is of a substantially square form. It includes a central hole on one side, a head window on both sides, an identification hole and a write-inhibit hole. The liner is provided between the case and the disk.
14、It comprises two layers of material between which the disk lies. The disk has a central hole with a metal hub attached. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/07/2007 03:32:01 M
15、DTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 10994:1992 (E) Section 2 - Environments, mechanical and physical characteristics 6 General requirements 6.1 Environment and transportation 6.1.1 Testing environment Tests and measurements made on the cartridge to check
16、the requirements of this International Standard shall be carried out under the following conditions: temperature : 23 “C + 2 “C relative humidity : 40 % to 60 % conditioning before testing : 24 h minimum For the tests specified in 9.3 the temperature and the relative humidity shall be measured in th
17、e air immediately surrounding the cartridge drive. For all other tests the temperature and the relative humidity shall be measured in the air immediately surrounding the cartridge. The stray magnetic field at any point on the disk surface, including that resulting from the concentrating effect of th
18、e recording head, shall not exceed 4 000 A/m. 6.1.2 Operating environment Cartridges used for data interchange shall be operated under the following conditions: temperature : 10 “C to 51,s “C relative humidity : 20 % to 80 % wet bulb temperature : less than 29 “C The temperature and the relative hum
19、idity shall be measured in the air immediately surrounding the cartridge. It is recommended that the rate of change of the temperature should not exceed 20 “C per hour. It is also recommended that the temperature and the relative humidity conditions when reading a cartridge are not at the opposite e
20、xtremes to the conditions when it was recorded. There shall be no deposit of moisture on or in the cartridge. The stray magnetic field at any point on the disk surface, including that resulting from the concentrating effect of the recording head, shall not exceed 4 000 A/m. 6.1.3 Storage environment
21、 During storage the cartridges shall be kept within the following conditions: temperature : 4 “C to 53 “C relative humidity : 8 % to 90 % The ambient stray magnetic field shall not exceed 4 000 A/m. There shall be no deposit of moisture on or in the cartridge. NOTE 3 - Cartridges which have been sto
22、red at temperatures and humidities exceeding the operating conditions may exhibit degraded performance characteristics. Such cartridges should be subjected to a conditioning period of not less than 24 h within the operating envi- ronment prior to use. 6.1.4 Transportation Responsibility for ensuring
23、 that adequate precautions are taken during the transportation shall be with the sender. The cartridge shall be in a protective package free from dust or extraneous matter. It is recommended that a 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
24、nsee=NASA Technical Standards 1/9972545001 Not for Resale, 04/07/2007 03:32:01 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 10994:1992 (E) sufficient space exists between cartridge and outer surface of the final container, so that risk of erasure due to stray mag
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