1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXJJYHAPOAHAR OPI-AHl43AuMR n0 CTAHAPTM3AL see IS0 781 l-2). 3.3 typical field : The minimum recording field that causes under the given test conditions a signal amplitude equal to 95
2、% of the maximum signal amplitude. 3.4 reference field : The typical field of the reference medium. 3.6 test recording current : The recording current between 200 % and 220 % of the current which is required to produce the reference field at a recording density of 165 ftpmm (420 ftpin). 3.6 average
3、signal amplitude : The average peak-to-peak amplitude of the read signal at 16.5 ftpmm (420 ftpin), averaged over the total recording. 3.7 reference signal amplitude : The average signal amplitude of the reference medium when recorded with the test recording current. 3.8 individual signal amplitude
4、: The peak-to-peak amplitude, not averaged, of the read signal at 16,5 ftpmm (420 ftpin). 3.9 location of a flux transition : The position of the maximum flux change on the surface of the magnetic stripe. 3.10 recording area : The area of the magnetic stripe on which data may be recorded. 3.11 drop-
5、in : A read signal which, when measured base to peak, exceeds 10 % of half the reference signal amplitude. 1) This standard is available from : Technical Secretary, Technical Association of the Pulp and Paper Industry, 360 Lexington Avenue, New York 10017, USA. 2) One reference medium source is : Fl
6、eischhauer Datentrtiger GmbH Germany F.R. 1 IS0 8484 : 1987 (El 4 Location of magnetic stripe 4.1 Parallel to printline The magnetic stripe shall be located on the outside of the back If the reader-encoder is integrated into a savingsbook printer, cover of the savingsbook. Two positions are defined
7、relative to the magnetic stripe shall be parallel to the printline (see one corner and the adjacent edges (see figure I). figure 1). Orientation of printline Back cover Orientation of printline Back cover - I Vertical Fold L Magnetic stripe 1 Horizontal Fold Figure 1 - General location of magnetic s
8、tripe on savingsbooks 2 IS0 8484: 1987 (El 4.2 Parallel to fold 5 Area of magnetic material In applications where a separate reader-encoder is used, it is generally preferable to have the stripe parallel to the fold, irrespective of the type of savingsbook used. The minimum area to be covered by mag
9、netic material shall be as shown in figure 2. NOTE - This area is based on the use of a read-write track equivalent to track 3 on an identification card. r Left reference edge Back cover of savingsbook ,-Minimum area for magnetic material Fold or edge r- of savingsbook I v- Lower reference edge I- d
10、 ti I a b c d e max. min. max. min. min. mm in mm in mm in mm in mm in 5 0.197 19 0.748 2,9 0.114 90 3.54 100 3.94 Figure 2 - Minimum area of magnetic material 3 IS0 6464 : 1987 (El 6 Requirements and testing Before testing is carried out, the savingsbook shall be stored for a minimum of 24 h in an
11、environment with a temperature of 23 f2OC and relative humidity of 50+ 10 %. Testing shall be carried out in the same environment. All signal amplitude measurements shall be performed in such a way that the values measured are proportional to the voltage induced in the read head. Prior to issue all
12、savingsbooks shall satisfy the following requirements : 6.1 Properties of the savingsbook cover with magnetic stripe 6.1.1 Stiffness For the determination of stiffness the bending moment is used. In the direction of the magnetic stripe the bending moment shall be not less than 16 x 10e4 N.m when tes
13、ted in accordance with TAPPI T488 OS-76. 6.1.2 Irregularities of the savingsbook cover in the area of the magnetic stripe There shall be no deformation, unevenness, or irregularities on the surface, in the area shown in figure 3, which would interfere with the magnetic stripe or its designed functio
14、n or which come in mechanical contact with the magnetic head. 6.1.3 Roughness of the magnetic stripe surface The average roughness R, of the magnetic stripe surface shall be measured in the longitudinal and transverse direction. Measurements shall be made with a cut-off wavelength of 0.8 mm (0.030 i
15、n) using a probe with a nominal radius of 2,5 pm (100 pin). The average roughness shall not be more than 1.4 pm (55,l pin). 6.1.4 Cover material After the magnetic stripe has been placed on the savingsbook cover, there shall be no reaction between the cover and the magnetic stripe which would cause
16、any malfunction of the magnetic stripe in normal use. The magnetic stripe shall not separate from the savingsbook cover under normal use. 6.2 Electromagnetic properties The reference medium is used to compare the properties of different savingsbooks with magnetic stripes and for the adjustment of de
17、vices which use them. The individual signal amplitudes of the reference medium shall be from 90 % to 110 % of the reference signal amplitude. All measurements shall be made in the recording area during the first read pass after recording with the test recording current. 6.2.1 Nominal density of flux
18、 transitions The nominal density of flux transitions shall be 16,5 ftpmm (420 ftpin). Dimensions in millimetres (inch in parentheses) Left reference edge -A_-/- -, Back cover of savingsbook Figure 3 - Area free of irregularities IS0 8484 : 1987 (El 6.2.2 Typical field The typical field of the magnet
19、ic stripe under test shall be from 80 % to 120 % of the reference field. 6.2.3 Average signal amplitude The average signal amplitude shall be from 80 % to 145 % of the reference signal amplitude, as shown in figure 4. 6.2.4 Individual signal amplitude All individual signal amplitudes shall be from 6
20、0 % to 160 % of the reference signal amplitude, as shown in figure 4. 6.2.5 Erasability The magnetic material shall be capable of being erased to a signal level of 4 % or less of its average signal amplitude by a direct write current equal to 200 % of the current which produces the reference field.
21、6.2.6 Test for drop-ins After the magnetic stripe has been erased with a direct current equal to the test recording current, any read signal which, when measured base-to-peak, exceeds 10 % of half the reference signal amplitude is a drop-in. The test shall be performed across the nominal track width
22、 and along the length of the magnetic stripe. During the test the signal amplitude of the magnetic stripe and the reference signal amplitude shall be measured under the same conditions on the first read pass after write. A magnetic stripe is unacceptable if it shows at least one drop- in during the
23、tests. 7 Operating environment A savingsbook with a magnetic stripe shall remain reliably usable under the following conditions : temperature : 5 to 40 C relative humidity : 20 % to 80 % +60Y: i 6 IS0 8484 : 1987 (E) UDC 681327.65 : 336.722241 Descriptors : data processing, banking documents, savings books, magnetic cards, specifications, dimensions. Price based on 6 pages
