BS ISO 1413:2016 download free.Horology – Shock-resistant wrist watches.
BS ISO 1413 specifies the minimum requirements for shock-resistant wrist watches and describes the corresponding test method.
It Is based on the simulation of the shock received by a wrist watch while falling from a height of 1 m onto a horizontal wooden floor (an equivalent surface Is described In BL1).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3158, TimekeepIng Instruments — Symbolization of control positions ISO 22810. Horology — Water-resistant watches
3 Terms and definitions
For the purpose oFthis document, the following definitions apply.
shock•resistance
ability to sustain impacts without damage
shock-resistant watch
watch that resists mechanical shocks according to this International Standard’s requirements
3,3
display components
elements of thu watch which determine and display a physical value to the consumer
F.XAMPLE Hands, calendar disks, rotating cylinders, pointers or any other mechanical devces.
Note I to entry: This includes any electro-optlcal display elements of the watch which determine or display. through their posinon, contrast, polarity, colour, sound or other properties, a physical value to the consumer.
3.4
residual effect
occurrence of failures or changes In the watch functions as a result of exposure to shocks
Note Ito entry: Any kind of failures are considered as residual effects. In order to determine the degree otshock resistance, residual effects are divided into permanent residual effect (1) and reversible residual effi’cts (ii).
permanent residual effect
changes in the display information and in the watch functions which remain present after the test Note Ito entry: The consumer does not have the ability to remedy said failures or reset the Iuncliors without the
Intervention of a professional watch service. These failures may include the following
— disconnected or repressed gear train of the hour a nd/or minute mechanism;
An example of test apparatus for the free-fall shocks is described in Annex C.
4.5 Preliminary settrngs of the test samples
4.5.1 Determination of the rate for mechanical watches
The rate or the watch under test shall be checked 30 mm to 60 mm after winding to maximum. respecting a stabilization time a 30 s prior to any rate measurement. The rate measurement duration shall be 40s in each of the positions FF1. 6H and 91! in accordance with ISO 3158, using an apparatus capable of measuring the instantaneous rate.
4.5.2 DetermInation of the rate for quartz watches
Quartz watches shall function for at least 2 ii 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.
4.5.3 DetermInation otthe watch head setups
— Mechanism for the drive of calendar or other watch display Items shall be set In a non•engaged, non- armed position.
— Chronograph display items shall be set in the reset (zero) position.
— LCD segments or any other electronic display item shall be checked and should all be functional.
— The time setting and (l1applicable the calendar setting function shall work correctly, without gear disengagement or abnormal rotating friction.
— The stop function of the watch movement (if applicable) shall work correctly
— All functions of push buttons or sliding switches, e.g. Start — Stop — Reset of chronographs; On — Off function for buzzer, lighting or any other function present, shall work correctly.
— Functional elements providing any mechanical, vibrating, acoustic, or any other signals shall be functional.
— Screw-down crowns or push buttons (if applicable) shall be set to the screwed-down position, as in normal use. Other crowns shall be set in the normal use position.
S Test method
5.1 General
Watches to be tested shall be separated for two different procedures.
— Shock test procedure applies to functional watch heads only and shall be used for shocks 1,2 and 3.
NOTE Shock 3 can be applied on a different watch head than that used for shock I and 2.
— Free-fall test procedure applies to complete watches with bracelets (including movement or equivalent dummy) and shaLl be used for free-fall shocks I and 2.
Flowcharts summarizing the following procedures (2 and 3) are described In Annex 0.
5.2 Procedure for shocks on watch heads
5.2.1 General
The watch heads shall be tested without having a bracelet or a strap attached.
The residual effect on the rate shall be calculated from the greatest difference of rates determined in the same position.
For practical reasons, the above measurements can be done with a time delay  60 mm after winding to the maximum
5.2.3.2.3 Permanent residual effects
— Changes of the rate shall not exceed: 2 s per day for quartz watches or 60 s per day for mechanical watches.
— Permanent changes of the time (hour and minute) are not accepted.
— Permanent changes on day and/or date are not accepted.
— Changes of electronic display items causing mistakable or non-determined time reading are not accepted.
— The examination of the watch shall not reveal any permanent deterioration affecting its functions. Its performance or Its appearance (e.g. hands bent or fallen off, altered display, Impaired automatic device or calendar, rotating bezel, cracked glass, bent horns, bent or broken crown or damaged push.button, etc.).
5.2.3.2.4 ReversIble residual effects
— Reversible changes olthe time displayed after the shocks shall not exceed—S mln/—30°. respectively for the angular displacement of the minute hand, as shown at S.2.2.2.
— Changes of the chronograph, alarm, countdown and any other time displayed after the shocks are accepted.
— Reversible changes of the date displayed (Including day and date hands) after the shocks are accepted.
5.2.3.2.5 Water resistance
Watches labelled water-resistant and not used for the third shock shall comply with ISO 22810.
5.2.4 Third shock
5.2.4.1 General
This test exposes the crown and the winding stem to one controlled shock.
The acceptance criteria shall be related to functionality of stem, e.g. resting positions, time setting, date adjustment, initialization, movement stop and synchronization, manual winding, electrical contacts and water-resistance.
5.2.42 Watch setups and shock description
— The time setting and (if applicable) the calendar setting function shall work correctly, without gear disengagement or abnormal rotating friction.
— The stop function of the watch movement (if applic.able) shall work correctly.
— MI functions of push buttons or sliding switches, e.g. Start – Stop – Reset of chronographs, On – Off function for buzzer, lighting or any other function present, shall work correctly.
— Screw-down crowns or push buttons (if applicable) shall be set to the screwed-down position, as in normal use. Other crowns shall be set in the normal use position.