BS ISO 6425:2018 pdf free
BS ISO 6425:2018 pdf free.Horology – Divers’ watches
diving technique that allows divers to reduce the risk of decompression sickness (“the bends”) when they work at deep diving for long periods of time
Note 1 to entry: In saturation diving, the divers live in a pressurized environment corresponding to the diving depth, which can be a hyperbaric chamber. This may be maintained for up to several weeks, and the divers are decompressed to surface pressure only once, at the end of their tour of duty. By limiting the number of decompressions in this way, the risk of decompression sickness is significantly reduced.
The watch shall be equipped with a diving time indicator (e.g. rotating bezel, digital display, or other).Such a device shall be protected against inadvertent handling. This device shall allow the reading of the diving time with a resolution of 1 min or better over at least 60 min.
For analogue displays, the markings indicating every 5 min shall be clearly indicated.Exposure to light shall be made in accordance with ISO 17514:2004, Clause 4. Minimum 180 min after the exposure, the visibility and readability of the following items shall be checked at a distance of 25 cm in the dark:
– the time (the minute indicator shall be clearly distinguishable from the hour indicator);
– the diving time, which shall be legible with an uncertainty of +2,5 min or less;
– for analogue displays, the markings indicating every 5 min;
– the indication that the watch is running;
– in the case of battery-powered watch, the battery end-of-life indication.
All mechanical devices related to water resistance, secured and not-secured, shall be tested. Devices (such as screw-down crown and pushers, etc.) for which the use in water is formally restricted in the accompanying documents of the watch (user manual, etc.) can be exempt from the test. In this case,those devices shall be in their rest position or secured if applicable and are therefore not submitted to the present test.BS ISO 6425 pdf free download.
