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GB/T 22778-2021: Liquid crystal digital quartz stopwatches
Status: Valid GB/T 22778: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 22778-2021 | English | 359 |
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4 days [Need to translate]
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Liquid crystal digital quartz stopwatches
| Valid |
GB/T 22778-2021
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| GB/T 22778-2008 | English | 399 |
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3 days [Need to translate]
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Liquid crystal digital quartz stopwatches
| Obsolete |
GB/T 22778-2008
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PDF similar to GB/T 22778-2021
Basic data | Standard ID | GB/T 22778-2021 (GB/T22778-2021) | | Description (Translated English) | Liquid crystal digital quartz stopwatches | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y11 | | Word Count Estimation | 18,183 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 22778-2021: Liquid crystal digital quartz stopwatches---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Liquid crystal digital quartz stopwatches
ICS 39.040.10
CCSY11
National Standards of People's Republic of China
Replace GB/T 22778-2008
LCD digital quartz stopwatch
Released on 2021-08-20
2022-03-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 22778-2008 "LCD Digital Quartz Stopwatch", compared with GB/T 22778-2008, except for editorial changes
The main technical changes outside the move are as follows.
---Modified the "normative references" (see Chapter 2, Chapter 2 of the.2008 edition);
---Revised the "period measurement accuracy" (see Table 2, Table 6,.2008 Edition of Table 2, Table 6);
---Modified the "temperature coefficient" (see Table 3, Table 3 of the.2008 edition);
--- Deleted the requirements and test methods of "humidity resistance" related to low temperature and humidity resistance (see 5.8, 6.4.8,.2008 edition of 4.8, 5.4.8);
--- Modify the requirements and test methods of "light resistance performance" to the requirements and test methods of "light performance" (see 5.14, 6.4.14,
(2008 version 4.14, 5.4.14);
--- Added "Additional Functions" (see 5.17, 6.4.17, Appendix A);
---Modified the "test environment" (see 6.1.1, 5.1.1 of the.2008 edition);
---Modified the "test equipment" (see Table 5, Table 5 of the.2008 edition);
---Modified the test method of "button fatigue resistance" (see 6.4.13,.2008 edition of 5.4.13);
---In the "factory inspection", an inspection of waterproof performance has been added (see Table 8, Table 8 of the.2008 edition);
--- Modified the markings in "Dial surface and back cover" (see 8.1.1, 7.1.1 of the.2008 edition).
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China National Light Industry Council.
This document is under the jurisdiction of the National Watch Standardization Technical Committee (SAC/TC160).
Drafting organizations of this document. Shenzhen Kingstar Industrial Co., Ltd., Shenzhen Huaming Watch Co., Ltd., Xi'an Light Industry Watch Institute
Co., Ltd., Hunan Shengshiweide Technology Co., Ltd., Zhejiang Zhuoyue Electronics Co., Ltd., Zhangzhou Hengli Electronics Co., Ltd., Shenzhen Titan
Clock Watch Technology Co., Ltd., Tianwang Electronics (Shenzhen) Co., Ltd., Zhuhai Rossini Watch Industry Co., Ltd., Shishi Xinjia Electronics Co., Ltd.,
Zhangzhou Yingzi Clock and Watch Co., Ltd., Shenzhen Shizhi Communication Technology Co., Ltd., Hangzhou Jingcheng Sanhe Timer Industrial Co., Ltd.
The main drafters of this document. Ren Longbiao, Zhang Huaping, Zhao Zhiming, Chen Zhendong, Zhao Yan, He Guangxian, Chen Huabo, Lu Xiangyan, Wang Jian, Xie Aimin,
Lan Liping, Chen Bin, Deng Jianjun, Yu Ke, Li Yuzhong, Guo Xingang, Huang Baoyu, Li Ping, Liu Zhong, Hong Xiaolan, Qiu Huazhi, Huang Zhixian, Chi Hanjun.
The previous versions of the standard replaced by this document are as follows.
---GB/T 22778-2008.
LCD digital quartz stopwatch
1 Scope
This document specifies the classification, requirements, test methods, inspection rules and standards of the liquid crystal digital quartz stopwatch (hereinafter referred to as "quartz stopwatch").
Logging, packaging, transportation and storage.
This document applies to LCD digital quartz stopwatches with a quartz resonator and a nominal working voltage of DC1.50V or DC3.0V.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 2828.1 Sampling inspection procedure by attributes Part 1.Batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 2829 Periodic Inspection Sampling Procedures and Tables by Attributes (Applicable to the Inspection of Process Stability)
GB/T 17626.2 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test
GB/T 30106 Waterproof watches
GB/T 38022 Anti-shock watches for clocks
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 categories
Quartz stopwatches are divided into dedicated type and non-dedicated type according to their purpose. See Table 1 for specific classification.
Table 1 Classification
Stopwatch type resolution usage
Dedicated full-time 0.01s handheld
Non-dedicated part time 0.01s handheld or wrist
5 requirements
5.1 Working temperature
The functions and LCD display of the special quartz stopwatch should be complete and normal at -5℃~50℃.
The functions and LCD display of the non-dedicated quartz stopwatch should be complete and normal within 0℃~50℃.
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