ISO 17514:2024 時間測定器 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 114, Horology, Subcommittee SC 5, Luminescence.

This second edition cancels and replaces the first edition (ISO 17514:2004), which has been technically revised.

The main changes are as follows:

• precisions have been added in the different test methods;
• the method of the ageing resistance test has been changed;
• 4.2, tests on components and on time-measuring instruments has been separated;
• adhesion tests (refers to ISO 3157 in ISO 17514:2004) have been added in this document.

Introduction

Luminescent deposits on watch components (hands, dial, bezel) give the possibility to read the time in the dark. Radioluminescent deposits were common in the past but are not used anymore except for certain products under certain conditions which may be the subject of national regulations. Nowadays, photoluminescent products are mainly used. Their properties have been considerably improved these last years.

The present document describes test methods performed only on photoluminescent deposits, including some which were described in ISO 3157 and ISO 4168 concerning radioluminescent deposits, these standards having been withdrawn.

1 Scope

This document specifies the test methods of various aspects of the photoluminescent deposits applied to time-measuring instruments, together with the requirements related to them.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

3.7

hand length

distance between the hole’s centre and the end showing the indication of hours and minutes

Note 1 to entry: See Figure 1

Figure 1 — Hand length

Key

l	hand length

Bibliography