GB/T 21978.6-2008Intrument for precipitation observation - Part 6: Melted snow type rain and snow recorder (English PDF)
降水量观测仪器 第6部分：融雪型雨雪量计
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
June 17, 2008
Implementation date
October 1, 2008
Scope
GB/T 21978.6-2008 is the English-translated version of 降水量观测仪器 第6部分：融雪型雨雪量计.
GB/T 21978.6-2008 is the part of GB/T 21978 on instruments for precipitation observation that covers the melted snow type rain and snow recorder, which the draft calls the snowmelt rain and snow meter.
Clause 1 states that this part specifies the classification and composition, technical requirements, test methods, inspection rules and signs, instructions, packaging, transportation and storage of that instrument, and that it applies to instruments which automatically measure the total amount of rain and snow by using methods such as heating or antifreeze to melt snow into liquid precipitation, namely rain, snow and sleet.
The same clause states that this part does not apply to snow meters that measure snowfall directly without melting the snow.
The draft shows clause 1 Scope, clause 2 Normative references and clause 3 Terms and Definitions and breaks off at the end of clause 3, so the classification, requirement and test clauses the scope announces do not appear on the page.
Clause 2 cites GB/T 9359-2001, GB/T 13264, GB/T 17626.5-1999, GB/T 18185-2000, GB/T 18522.2, GB/T 18522.6, GB/T 19677, GB/T 19704-2005, GB/T 19705-2005 and SL 21.
Clause 3 carries three definitions whose term names the draft does not print: a special liquid of lowered freezing point, with good snow melting performance at low temperature and a density less than or close to that of water, which does not freeze within the range of the instrument use environment; a vessel charged with a set quantity of that liquid, into which falling snow melts; and a capped container with the liquid built in that has a function for replenishing a measured quantity of it at intervals.
The foreword records that GB/T 21978 is divided into seven parts, on rain gauges, the tipping bucket rain gauge, the siphon rain gauge, the float rain gauge, the telemetry rain gauge, the snowmelt snow meter and the optical snow meter, that this part was proposed by the Ministry of Water Resources of the People's Republic of China and that it is administered by TC199/SC1.
The page names no earlier edition of this part; it was issued on 17 June 2008 and has applied since 1 October 2008.
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Document preview — GB/T 21978.6-2008
National Standard of the People's Republic of China
- ICS
- 07.060
- Classification
- N 93
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions GB/T 19677 and established the following
Foreword
GB/T 21978 "Precipitation observation instruments" is divided into seven parts.
--- Part 1. gauges;
--- Part 2. tipping bucket rain gauge;
--- Part 3. Siphon rain gauge;
--- Part 4. float rain gauge;
--- Part 5. telemetry rain gauge;
--- Part 6. Snowmelt snow meter;
--- Part 7. Optical snow meter.
This section GB/T 21978 Part 6.
This section proposed by the People's Republic of China Ministry of Water Resources.
This part of the National Technical Committee of Standardization Technical Committee hydrological hydrological instruments (TC199/SC1) centralized.
This part mainly drafted by. MWR hydrological instruments and geotechnical engineering Instrument Quality Supervision and Testing Center, Nanjing Auto Hydrological The Institute.
1 Scope
This section GB/T 21978 specifies the amount of rain and snow Snowmelt meter (hereinafter referred to sleet meter) Classification and composition, technical requirements, test Methods, inspection rules and signs, instructions, packaging, transportation and storage.
This section applies to the use of methods such as heating or antifreeze snow melt into liquid after the precipitation (rain, snow, sleet) automatic measurement of the amount of Total amount of rain and snow.
This section does not apply to snow melt will not be directly measured snowfall Snow meter.
2 Normative references
The following documents contain provisions which, through reference GB/T 21978 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 9359-2001 hydrological instruments environmental testing conditions and methods
GB/T 13264 percent nonconforming small lot sampling inspection procedures and sample forms
GB/T 17626.5-1999 Electromagnetic compatibility - Testing and measurement techniques - Surge (impact) immunity test (idt IEC 61000-4-5:1995)
GB/T 18185-2000 hydrological instruments reliability technical requirements
GB/T 18522.2 hydrologic instruments - Part 2: Reference Operating Conditions
GB/T 18522.6 hydrologic instruments - Part 6: inspection rules and signs, packaging, transportation, storage and operation manual
GB/T 19677 Terms and symbols for hydrological Instruments (GB/T 19677-2005, ISO 772. 1988, NEQ)
GB/T 19704-2005 hydrological instruments and records show
GB/T 19705-2005 hydrological instruments and signal interfaces
SL 21 precipitation observing practices
3 Terms and Definitions
GB/T 19677 and established the following terms and definitions apply GB/T 21978 in this section.
3.1
Lower the freezing point of a special liquid, with good low-temperature melting snow performance, density less than or close to water within the range of the instrument does not use environment freeze.
3.2
Antifreeze formula for rain and snowmelt meter vessel, which built a certain amount of antifreeze, when snow can melt snow into which their own.
3.3
Built-in antifreeze capped container having regular antifreeze to supplement quantitative snowmelt function.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 9359-2001Basic conditions and methods of environmental test for hydrological instrument
- GB/T 13264Sampling procedures and tables for small lot inspection by attributes for percent nonconforming items
- GB/T 17626.5-1999Electromagnetic compatibility - Testing and measurement techniques - Surge immunity test
- GB/T 18185-2000Specification of reliability for hydrologic instruments
- GB/T 18522.6General specification for hydrometric instrument -- Part 6: Inspection regulation, mark, package, transportation, storage and operation manual
- GB/T 19677Essential technical terms and symbols for hydrologic instrument
GB/T 18522.2
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Related Standards
GB/T 13264-2008 — Sampling procedures and tables for small lot inspection by attributes for percent nonconforming items
GB/T 18522.6-2007 — General specification for hydrometric instrument -- Part 6: Inspection regulation, mark, package, transportation, storage and operation manual
GB/T 19677-2005 — Essential technical terms and symbols for hydrologic instrument
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GB/T 21978.6-2008
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