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1、INTERNATIONAL STANDARD IS0 6425 Third edition 1996-07-01 Divers watches Montres de plongge Reference number IS0 6425:1996(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 20:40
2、:57 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6425: 1996(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carr
3、ied out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established 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.
4、IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires ap
5、proval by at least 75 % of the member bodies casting a vote. International Standard IS0 6425 was prepared by Technical Committee lSO/TC 114, Homology, Subcommittee SC 3, Water resistant watches. This third edition cancels and replaces the second edition (IS0 6425:1984), which has been technically re
6、vised. Annex A forms an integral part of this International Standard. 0 IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronrc or mechanIcal, including photocopyrng and microfilm, without permission
7、In writing from the publisher. International Organization for Standardization Case Postale 56 l CH-121 1 Geneve 20 l Swi tzerland Printed In Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not
8、for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 6425:1996(E) Divers watches I Scope 3 Definition This International Standard specifies requirements and test methods for divers watches and for divers watches fo
9、r use in deep diving (see annex A which deals with watches for mixed-gas diving). For the purposes of this International Standard, the following definition applies. 3.1 diver s watch: A watch designed to withstand diving in water at depths of at least 100 m and pro- cessing a system to control the t
10、ime. NOTE 1 Hereafter “diver s watch” is referred to simply as “watch”. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publica- tion, the editions indicated were valid. All
11、standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standa
12、rds. I SO 764: 1984, Horology - Antimagnetic watches. IS0 1413:1984, Horology - Shock-resistant watches. IS0 2859-l : 1989, Sampling procedures for inspection by attributes - Part 7: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection. I SO 2859-2: 1985, Sampling proce
13、dures for inspection by attributes - Part 2: Sampling plans indexed by limiting quality (LC?) for isolated lot inspection. IS0 2859-3: 1991 d Sampling procedures for inspection by attributes - Part 3: Skip-Xot sampling procedures. 4 Designation Any watch bearing the designation “diver s watch” in re
14、lation to diving depths of 100 m and beyond, or any other similar term, shall satisfy the minimum require- ments laid down in clause 6. 5 Practical meaning All operations described are intended to simulate conditions in which watches will remain undamaged and still operate after diving at a) L m of
15、water for 1 h per dive (Ap = L/IO bar ) followed by b) 3 m of water for 1 h per dive (Ap = 0,3 bar). NOTES 2 (optional test) b) set time of the time-preselecting device; c) indication that the watch is running; The watch shall show no air-flow exceeding 50 pg/min when tested as described in 7.32. d)
16、 in the case of battery-powered watches, a battery end-of-life indication. 6.1 O Water-tig overpressure 6.3 Antimagnetic properties The watch shall be antimagnetic in accordance with the requirements of IS0 764. 6.4 Shock resistance The watch shall be shock resistant in accordance with the requireme
17、nts of IS0 1413. 6.5 Salt water resistance The watch shall be salt water resistant; i.e. after being submitted to the tests as described in 7.3.3, it shall not show important changes on the case or on the accessories and the moving parts shall continue to function normally. 7.1 Type testing and 100
18、% single-watch The watch shall show no condensation when tested as described in 7.3.7. Furthermore, it shall function normally, in particular the second hand shall continue to function normally, during and after the test as indi- cated in 7.3.7. 6.11 Resistance to at ospheres containing gas mixtures
19、 It should be noted that use of a watch in an atmos- phere containing gas mixtures may result in the watch failing to function normally. In this case, refer to annex A. 7 Test methods testing 6.6 Reliability under water During the test indicated in 7.3.4, the mechanisms required to function in the w
20、ater, for example the time-preselecting device and the light switch, shall functinn tyx-recfty, Pkl n-k8 did! t!.qxxw t-li thP p$-ip-z Testing of the watch is divided in two groups: - type testing, and - 1 OR or ) tfzd-jn(lY f, 2 Copyright International Organization for Standardization Provided by I
21、HS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 6425: 1996(E) Tests for the requirements given in table 1 shall be conducted as type testing, in accordance
22、 with parts 1 to 3 of IS0 2859. Every watch shall undergo the test of water resist- ance to an overpressure of water (I 00 % testing), in- cluding the tests indicated in 7.3.7. 7.2 Summary of requirements and tests The order for carrying out the tests given in table 1 is only a suggestion. 7.3 Descr
23、iption of tests Visual checking shall be carried out without a magni- fying instrument. 7.3.1 Resistance of attachments to an external force The watch shall be subjected to an external force of 200 N, as shown in figure 1. The bracelet of the watch being tested shall be closed. 7.32 Air-tightness at
24、 an air overpressure (optional test) Any watch undergoing this optional test shall be sub- jected to an air overpressure of Ap = 2 bar and the flow of air entering the watch shall be measured. Comparable test methods, for example with inert gases, are permitted. Watches giving a high flow of air sha
25、ll be eliminated from the test immediately. Table I - Designation of tests and requirements Visibility Antimagnetic property Resistance of attachments to an external force Air-tightness at an air overpressure (optional test) Salt water resistance Reliability under water Resistance to thermal shock (
26、see IS0 764) Resistance of crowns and other setting devices to an external force Shock resistance Water-tightness and resistance at a water overpressure 6.10 (see IS0 1413) 7.3.7 Dimensions in millimetres Figure 1 - Representation of the test for resistance of attachments Copyright International Org
27、anization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6425: 1996(E) 0 IS0 7.3.3 Resistance to salt water The watches under t
28、est shall be put in a 30 g/l sodium chloride solution and kept there for 24 h at 18 “C to 25 “C. After this test, the case and accessories shall be examined for any possible changes. Moving parts, particularly the rotating bezel, shall be checked for correct functioning. 7.3.4 Reliability under wate
29、r The watches under test shall be immersed in water to a depth of 30 cm + 2 cm for 50 h at 18 “C to 25 “C and all the mechanisms shall still function cor- rectly. The condensation test as described in 7.3.8 shall be carried out before and after this test to ensure that the result is related to the a
30、bove test. 7.3.5 Resistance to thermal shock The watches under test shall be subjected to the fol- lowing test cycle when immersed to a depth of 30 cm + 2 cm in water: - a) immersion in water at 40 “C + 2 “C for IO min; b) immersion in water at 5 “C + 2 “C for 10 min; Subsequently the overpressure s
31、hall be reduced to 0,3 bar within 1 min and maintained at this pressure for 1 h. The watches shall then be removed from the water and dried with a rag. The condensation test as described in 7.3.8 shall be carried out before and after this test to ensure that the result is related to the above test.
32、7.3.8 Condensation test The watch shall be placed on a heated plate at a temperature between 40 “C and 45 “C until the watch has reached the temperature of the heated plate (in practice, a heating time of IO min to 20 min, de- pending on the type of watch, will be sufficient). A drop of water, at a
33、temperature of 18 “C to 25 “C shall be placed on the glass of the watch. After about 1 min, the glass shall be wiped with a dry rag. Any watch which has condensa tion on the interior surface of t he glass shall be elimi nated. 8 Marking Watches which satisfy the requirements of clause 6 are marked w
34、ith the following terms in the respective languages: c) immersion in water at 40 “C + 2 “C for 10 min. - in English: divers s watch L m; The time of transition from other shall not exceed 1 min. one immersion to the The condensation test as described in 7.3.8 shall be carried out before and after th
35、is test to ensure that the result is related to the above test. 7.3.6 Resistance of crowns and other setting devices to an external force The watches under test shall be subjected to an overpressure in water of (L + 0,25L)/lO bar for 10 min and to an external force of 5 N, as shown in figure 2. The
36、condensation test as described in 7.3.8 shall be carried out before and after this test to ensure that the result is related to the above test. 7.3.7 Water-tightness and resistance at a water overpressure The watches under test shall be immersed in water contained in a suitable vessel. Then an overp
37、ressure of Ap = (L + 0,25L)/lO b ar shall be applied within 1 min and maintained for 2 h. - in French: montre plongeur L m, or montre de plongee L m; - in Russian: BOflOHenpOHl4LeMble E M. Figure 2 - Representation of the test of applying force to the crown The abbreviation “diver s L m” may be used
38、 in Eng- . . . Iish. Equivalent terms in other languages are admissible. The letter E indicates the diving depth, in metres, guaranteed by the manufacturer. 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997254500
39、1 Not for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 6425:1996(E) As a precaution in real use, the following recommen- d b) not to be used for deep diving (diving with a gas mixture) or at a depth greater than that indicated. Copyr
40、ight International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 6425: 1996(E) Annex A (normative) Divers watches
41、 for mixed-gas diving A. 1 General Diving at a great depth and for a long period is done in a diving chamber, with the diver spending time al- ternately in the water and in a pressurized environ- ment, breathing a gas mixture. In this case, the watch is subjected to the pressure of the gas mixture a
42、nd its functioning can be disturbed. Consequently, it is rec- ommended to subject the watch to the special extra test indicated in this annex. A.2 Definition A.2.1 diver s watch for mixed-gas diving: A watch required to be resistant during diving in water to a depth of at least 100 m and to be unaff
43、ected by the overpressure of the mixed gas used for breathing. NOTE 4 Hereafter, “diver s watch for mixed-gas diving” is referred to simply as “watch”. A.3 Requirements and tests All the requirements specified in clause 6 of this International Standard shall be satisfied completely. The test describ
44、ed in A.3.1 is obligatory, but that de- scribed in A.3.2 is complementary. A.3.1 Test of operation at a gas overpressure The watch is subjected to the overpressure of gas which will actually be used, i.e. (L + 0,25 I,)/1 0 bar, for 15 days. Then a rapid reduction in pressure to the at- mospheric pre
45、ssure shall be carried out in a time not exceeding 3 min. After this test, the watch shall satisfy the require- ments given in 6.10. An electronic watch shall function normally during and after the test A mechanical watch shall function normally after the test (the power reserve normally being less
46、than 15 days). A.3.2 Test lby internall pressure (simulation of decompression) Remove the crown together with the winding and/or setting stem. In its place, fit a crown of the same type with a hole. Through this hole, introduce the gas mixture which will actually be used and create an overpressure o
47、f Ap = L/20 bar in the watch for a period of 10 h (see figure AI). Then carry out the test at a water overpressure ac- cording to 7.3.7. In this case, the original crown with the stem shall be refitted beforehand. Figure A.1 - Representation of the internal pressure test After this test, the watch s
48、hall satisfy the require- ments of clause 6. A.4 Marking Watches used for mixed-gas diving which satisfy the requirements of A. 3 are marked as follows: - in English: diver s watch L m for mixed-gas diving; - in French: montre de plongee en saturation L m; - in Russian: Yacbj nn nor3ot-roro nnasaHHH
49、 c raso- BOh CMKbK) L M. 6 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/23/2007 20:40:57 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 6425:1996(E) The letter I