17.120.20 明渠中流量的测量 标准查询与下载



共找到 565 条与 明渠中流量的测量 相关的标准,共 38

Hydrometry — Catching-type liquid precipitation measuring gauges

ICS
17.120.20
CCS
发布
2023-11-01
实施

Measurement of liquid flow in open channels — Parshall and SANIIRI flumes

ICS
17.120.20
CCS
发布
2023-11-01
实施

Hydrometry — Acoustic Doppler profiler — Method and application for measurement of flow in open channels from a moving boat

ICS
17.120.20
CCS
发布
2023-11-01
实施

1   Scope This document specifies general requirements, minimum performance requirements and test procedures for instrumentation used to measure either volumetric flow-rate and/or total volume passed of water in closed conduits . It covers all closed conduit instrument ( CCI ) technologies intended to operate in closed pressurized pipes and partially filled pipes. Requirements are expressed in volumetric units which may be converted to mass using the density of the water. It is recognized that for some CCIs certain tests cannot be carried out. The data obtained from the testing of CCIs in accordance with the requirements of the Measuring Instruments Directive [1] or EN ISO 4064‑1 [2] can be used to meet, in part, the requirements specified in this document. However, for the avoidance of doubt, compliance with the requirements of this document does not equate to compliance with the requirements of the Measuring Instruments Directive or EN ISO 4064‑1.

Hydrometry. Minimum performance requirements and test procedures for water monitoring equipment. Devices for the determination of flow - Closed conduit instrumentation

ICS
17.120.20
CCS
发布
2023-06-30
实施
2023-06-30

本标准规定了便携式(磁致伸缩)明渠流量计的基本要求、技术要求、检验方法、检验规则及标志、包装、运输和贮存。

Technical Requirements for Portable (Magnetostrictive) Open Channel Flowmeters

ICS
17.120.20
CCS
N772
发布
2023-05-05
实施
2023-06-04

Measurement of density of water-sediment mixture using radiation transmission method

ICS
17.120.20
CCS
发布
2023-05
实施

BS ISO 19234. Hydrometry. Low cost baffles to aid fish passage on triangular profile gauging weirs

ICS
17.120.20
CCS
发布
2023-02-07
实施
2023-02-07

1   Scope This document provides an understanding of the nature of measurement uncertainty and its significance in estimating the "quality" of a measurement or a determination in hydrometry. This document is applicable to flow measurements in natural and man-made channels. Rainfall measurements are not covered.

Hydrometric uncertainty guidance (HUG)

ICS
17.120.20
CCS
发布
2023-01-31
实施
2023-01-31

1   Scope This document specifies methods for the measurement of flow in rivers and artificial channels under steady or slowly varying flow conditions, using certain types of critical-depth flumes (also known as “standing-wave flumes”). A wide variety of flumes has been developed, but only those critical-depth flumes which have received general acceptance after adequate research and field testing, and which therefore do not require in situ calibration, are considered herein. The flow conditions considered are uniquely dependent on the upstream head, i.e. subcritical flow must exist upstream of the flume, after which the flow accelerates through the contraction and passes through its critical depth (see Figure 1). The water level downstream of the structure is low enough to have no influence upon its performance. This document is applicable to three commonly used types of flumes, covering a wide range of applications, namely rectangular-throated, trapezoidal-throated and U-throated. The hydraulic theory behind this document was presented in Reference [7]. This document is not applicable to a form of flume referred to in the literature (sometimes called a “Venturi” flume) in which the flow remains subcritical throughout. NOTE The Venturi form of flume is based on the same principle as a Venturi meter used within a closed conduit system and relies upon gauging the head at two locations and the application of Bernoulli’s energy formula.

Flow measurement structures. Rectangular, trapezoidal and U-shaped flumes

ICS
17.120.20
CCS
发布
2023-01-31
实施
2023-01-31

1.1 This test method describes measurement of the average velocity of a gas stream for the purpose of determining gas flow in a stack, duct, or flue. Although technically complex, it is generally considered the most accurate and often the only practical test method for taking velocity measurements. 1.2 This test method is suitable for measuring gas velocities above 3 m/s (10 ft/s). 1.3 This test method provides procedures for determining stack gas composition and moisture content. 1.4 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only. 1.5 This test method is applicable to conditions where steady-state flow occurs, and for constant fluid conditions, where the direction of flow is normal to the face tube opening of the pitot tube employed in the method. The method cannot be used for direct measurement when cyclonic or swirling flow conditions are present. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Standard Test Method for Average Velocity in a Duct (Pitot Tube Method)

ICS
17.120.20
CCS
发布
2023-01-01
实施

Hydrometry — Open channel flow measurement using triangular profile weirs

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Open channel flow measurement using thin-plate weirs

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship

ICS
17.120.20
CCS
发布
2022-12-30
实施

Liquid flow in open channels — Sediment in streams and canals — Determination of concentration, particle size distribution and relative density

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Selection, establishment and operation of a gauging station

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Open channel flow measurement using thin-plate weirs

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Selection, establishment and operation of a gauging station

ICS
17.120.20
CCS
发布
2022-12-30
实施

Hydrometry — Open channel flow measurement using triangular profile weirs

ICS
17.120.20
CCS
发布
2022-12-30
实施

Liquid flow in open channels — Sediment in streams and canals — Determination of concentration, particle size distribution and relative density

ICS
17.120.20
CCS
发布
2022-12-30
实施



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