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GB/T 21699-2008 English PDF

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GB/T 21699-2008: Verification/calibration method of rotating-element current meters in straight open tank
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 21699-2008399 Add to Cart 3 days Verification/calibration method of rotating-element current meters in straight open tank Valid

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Basic data

Standard ID: GB/T 21699-2008 (GB/T21699-2008)
Description (Translated English): Verification/calibration method of rotating-element current meters in straight open tank
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: N93
Classification of International Standard: 07.060
Word Count Estimation: 17,116
Date of Issue: 2008-04-09
Date of Implementation: 2008-07-01
Quoted Standard: GB/T 11826-2002; GB/T 19677-2005; GB/T 50095-1998
Regulation (derived from): Announcement of Newly Approved National Standards No. 6, 2008 (No. 119 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the rotor flow meter verification/calibration principles, equipment, procedures, methods, certificates, information and flow meter test tank inspection and so on. This standard applies to rotor flow meter verification/calibration, including the gun used in the nullah Propeller, rotary cup type current meter and laboratory use micro- rotor flow meter.

GB/T 21699-2008: Verification/calibration method of rotating-element current meters in straight open tank


---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.
Verification/calibration method of rotating-element current meters in straight open tank ICS 07.060 N93 National Standards of People's Republic of China Straight out of the slot rotor Flow Meter Test/calibration method Posted 2008-04-09 2008-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

The Standard Appendix B, Appendix C are normative appendices, Appendix A is an information appendix. The standard proposed by the People's Republic of China Ministry of Water Resources. This standard by the National Standardization Technical Committee Technical Committee hydrological hydrological instruments. This standard is mainly drafted by. MWR hydrological instruments and geotechnical engineering Instrument Quality Supervision and Testing Center, Nanjing Auto Hydrological The Institute, Taiyuan University of Technology Tiancheng Technology Co., Ltd., Liaoning Province, flood control equipment testing center. The main drafters of this standard. Yaoyong Xi, Li Gang, Zhangyuan Yi, Su Bin, Hesheng Rong, Wang Kang, Lu Xu. Straight out of the slot rotor Flow Meter Test/calibration method

1 Scope

This standard specifies the principles, equipment, procedures, methods, certificates, information and flow meter calibration groove (hereinafter rotor flow meter verification/calibration Referred to as "test slot") acceptance and so on. This standard applies to the rotor flow meter verification/calibration, including in open channel with the propeller speed, spinning cup flow meter and laboratory With micro-rotor type flow meter. NOTE. This standard does not consider the velocity meter in linear static tank mobile test/calibration with the difference in the turbulent water flow rate measuring point is present, as well as temperature and Errors on sediment concentration and other media generated.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 11826-2002 rotor flow meter GB/T 19677-2005 Terms and symbols for hydrological Instruments GB/T 50095-1998 standard hydrological basic terminology and symbols

3 Terms and Definitions

GB/T 19677-2005 and GB/T 50095-1998 and established the following terms and definitions apply to this standard. 3.1 Continuous and stable rotation of the rotor began to minimum flow rate, symbol vp 0. 3.2 Flow meter calibration graph, the transition to a low-flow rate curve at the turning point of the straight portion, symbols vp k. 3.3 Each revolution of the rotor, water particles move from symbol to Chou. 3.4 Additional instrument and rotor structure coefficient and skin friction related symbols Rao. 3.5 A groove between assay, or other instrument than the measured flow rate of the calibrated stable performance, high accuracy flow meter dedicated. 3.6 Slot by the flow meter and the forward motion of the suspension device along the peaks produced, can wet section height increases, reducing the relative velocity,
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