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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATlON.MEYHAPOHAR OPrAHMSALWlR IlO CTAHAPTIAMM.ORGANISATION INTERNATIONALE DE NORMALISATION Horology - Shock-resistant watches Horlogerie - Montres rdsistant aux chocs Second edition - 1984-04-15 UDC 681.114.8-752: 620.1 : 531.66 Ref. No
2、. IS0 1413-1984 (E) Descriptors : horological industry, time measuring instruments, watches, shock resistance, tests, impact tests. Price based on 3 pages Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The
3、 work of developing International Standards is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental and non-governmental
4、, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. International Standard IS0 1413 was developed by Technical Comm
5、ittee ISO/TC 114, Homology, and was circulated to the member bodies in March 1983. It has been approved by the member bodies of the following countries : Czechoslovakia France Germany, F. R. India Japan Mexico Romania Switzerland USSR No member body expressed disapproval of the document. This second
6、 edition cancels and replaces the first edition (i.e. IS0 1413-1973). 0 International Organization for Standardization, 1984 Printed in Switzerland INTERNATIONAL STANDARD IS0 1413-1984 (E) Horology - Shock-resistant watches 1 Scope and field of application This International Standard specifies the m
7、inimum re- quirements for shock-resistant watches and describes the cor- responding method of test. It is intended to allow homologation testing of watches rather than the individual control of all watches of a production batch. Indeed, assuming that each watch could comply with the minimum requirem
8、ents without apparent damage, readjust- ment could still be made necessary because the test can lead to an alteration of the initial rate of a watch. This International Standard is based on the simulation of the shock received by a watch on falling accidentally from a height of 1 m on to a horizonta
9、l hardwood surface. 2 Reference IS0 3158, Timekeeping instruments - Symbolization of con- trol positions. 3 Definitions For the purpose of this International Standard, the following definitions apply. 3.1 shock-resistant watch : A watch complying with the minimum requirements of this International S
10、tandard. 3.2 residual effect : The difference of rates observed under the conditions of test specified in this International Standard. 4 Minimum requirements When tested as specified in clause 5, a shock-resistant watch shall comply with the following minimum requirements : a) it shall not stop afte
11、r either of the two shocks; b) the residual effect shall not exceed 2 s per day for quartz watches, or 60 s per day for all other types of watches; c) examination of the watch shall not reveal any deteriora- tion affecting its performance or its appearance (for 5 A example bent or displaced hands, a
12、ltered display, impaired automatic device or calendar, cracked glass, bent horns, bent or broken crown or damaged push-button, etc.). Method of test wristwatch shall be tested without the bracelet, unless the latter forms an integral part of the watch. 5.1 Test temperature Throughout the test period
13、, the ambient temperature shall be between 18 and 25 OC and shall not vary by more than 2 OC. 5.2 Apparatus The apparatus used to produce the shock shall be a pendulum impact tester (see clause 7) or any other apparatus the con- struction of which complies with the characteristics specified in claus
14、e 6. 5.3 Procedure 5.3.1 Determination of rate before shocks 5.3.1 .l Mechanical watches Sixty minutes after winding to maximum, the rate of the watch to be tested shall be checked continuously for at least 1 min in each of the positions FH, 6H and 9H (see IS0 3158) using an apparatus for measuring
15、the instantaneous rate. 5.3.1.2 Quartz watches Quartz watches shall be allowed to function for at least 2 h before starting the test; after this period, the rate shall be checked in position CH or FH using an apparatus for measuring the instantaneous rate. 5.3.2 First shock The shock shall be direct
16、ed against the caseband, parallel to the plane of the watch, on the “9 oclock” side. NOTE - Similarly, in the case of watches with a digital display, the shock should be given at the same location. 1 IS0 1413-1984 (E) 5.3.3 Second shock 6.1.3 The total mass of the hammer, including the sabot, shall
17、be at least 3 kg. The shock shall be direc the plane of the watch. ted against the glass, perpendicular to 6.2 Impact speed The impact speed v, corresponding to an unimpeded fall from a height of 1 m, is 443 m/s. 5.3.4 Determination of rate after shocks 5.3.4.1 Mechanical watches 6.3 Arresting devic
18、e applied to the watch after shock Five minutes after the second shock, the rate shall be checked continuously for at least 1 min in each of the positions FH, 6H and 9H using an apparatus for measuring the instantaneous rate. After the shock, the watch shall travel freely along its trajectory and sh
19、all be gradually arrested by a device which does not in- flict any further shock. 5.3.4.2 Quartz watches 7 Characteristics specific to pendulum impact testers Five minutes after the second shock, the rate shall be checked in position CH or FH using an apparatus for measuring the in- stantaneous rate
20、. If a pendulum impact tester is used, it shall according to the following req uirements. and used 5.4 Residual effect 7.1 Starting position of hammer The residual effect shall be calculated from the greatest dif- ference of rates determined in the same position under the con- ditions specified in 5
21、.3.1 and 5.3.4. The angle a, figure 2), shal giving the starting position I be calculated by means of of the hammer the formula VT cos 55 = - 2 4w 6 Characteristics common to all types of apparatus The following characteristics apply for all types of apparatus. V = 4,43 m/s; T is the period, in seco
22、nds; 61 . Characteristics of hammer r is the radius, in metres. 6.1.1 The part of the hammer striking the shall be made of polytetrafluoroethylene. watch (the sabot) These last two values are determined the pendulum impact tester. by the manufacturer of 6.1.2 The dimensions of the sabot shall be as
23、shown in figure 1. The period T represents the duration, oscillation 0 f low amplitude (see figure 3) in seconds, a30mm P max = loo e 10mm Sabot Hammer e a Figure 1 -,-,- IS0 1413-1984 (E) 7.2 Working check Before performing tests, the proper function of the hammer shall be checked. The check shall
24、be carried out with the hammer freely oscillating. The manufacturer of the pendulum impact tester shall state the minimum height h (see figure 4) corresponding to the ascent of the hammer to position B after starting in position A (horizon- tal). If this height h is not reached, the pendulum impact
25、tester shall be checked. 7.3 Position of watch 7.3.1 The watch shall be laid freely on its horizontal support to be subjected to the two shocks indicated in 5.3.2 and 5.3.3. 7.3.2 The position occupied by the watch on this support shall be such that the shock is produced at the exact instant when th
26、e pendulum passes through its point of stable equilibrium. 7.4 Conditions of shock 7.4.1 At the moment of impact, the face of the sabot entering into contact with the watch shall be vertical and parallel to the vertical plane containing the axis of oscillation of the pen- dulum. 7.4.2 The polytetraf
27、luoroethylene plate striking the watch shall be periodically shifted or ground flat. 8 Marking Watches which satisfy the minimum requirements specified in clause 4 may be marked with the mention - “shock-resistant”, in English; Shock Figure 2 - “resistant aux chocs”, in French; Figure 3 - “aHTMy#3pH ble”, in Russian; - “sto - ” i% “, in Japanese; - II p&g II , in Chinese. ! -2 4 / B 1 -c / Figure 4 3 This page intentionally left blank -,-,- This page intentionally left blank -,-,- This page intentionally left blank -,-,-