{"id":426290,"date":"2024-10-20T07:01:15","date_gmt":"2024-10-20T07:01:15","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-253772022-tc-2023\/"},"modified":"2024-10-26T13:16:16","modified_gmt":"2024-10-26T13:16:16","slug":"bs-en-iso-253772022-tc-2023","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-253772022-tc-2023\/","title":{"rendered":"BS EN ISO 25377:2022 – TC 2023"},"content":{"rendered":"

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.<\/p>\n

This document is applicable to flow measurements in natural and man-made channels. Rainfall measurements are not covered.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\n30469510 <\/td>\n<\/tr>\n
115<\/td>\nA-30328617 <\/td>\n<\/tr>\n
116<\/td>\nundefined <\/td>\n<\/tr>\n
118<\/td>\nEuropean foreword
Endorsement notice <\/td>\n<\/tr>\n
121<\/td>\nForeword <\/td>\n<\/tr>\n
122<\/td>\nIntroduction <\/td>\n<\/tr>\n
125<\/td>\n1 Scope
2 Normative references
3 Terms and definitions
4 Symbols <\/td>\n<\/tr>\n
127<\/td>\n5 ISO\/IEC Guide 98-3 (GUM) \u2014 Basic definitions and rules
5.1 General
5.2 Uncertainty of sets of measurements <\/td>\n<\/tr>\n
128<\/td>\n5.3 Random and systematic effects <\/td>\n<\/tr>\n
129<\/td>\n5.4 Uncertainty models \u2014 Probability distributions
5.5 Combining uncertainties \u2014 Law of propagation of uncertainties <\/td>\n<\/tr>\n
130<\/td>\n5.6 Expressing results
6 Open channel flow \u2014 Velocity area methods
6.1 General <\/td>\n<\/tr>\n
131<\/td>\n6.2 Mean velocity, \ufffc <\/td>\n<\/tr>\n
132<\/td>\n6.3 Velocity-area method for discharge calculation <\/td>\n<\/tr>\n
133<\/td>\n6.4 Measurement of velocity
6.5 Uncertainty associated with the velocity-area method
6.5.1 General <\/td>\n<\/tr>\n
135<\/td>\n6.5.2 Random and systematic effects
6.6 Integration uncertainties \ufffc
6.6.1 General
6.6.2 Vertical scanning uncertainties <\/td>\n<\/tr>\n
136<\/td>\n6.6.3 Horizontal scanning uncertainties
6.7 Perimeter flow uncertainties, \ufffc <\/td>\n<\/tr>\n
137<\/td>\n7 Open channel flow \u2014 Critical depth methods
7.1 General
7.2 Head and geometry determination <\/td>\n<\/tr>\n
138<\/td>\n7.3 Iterative calculation
7.4 Evaluating uncertainty <\/td>\n<\/tr>\n
139<\/td>\n8 Dilution methods
8.1 General
8.2 Continuous feed <\/td>\n<\/tr>\n
141<\/td>\n8.3 Transient mass <\/td>\n<\/tr>\n
142<\/td>\n9 Hydrometric instrumentation
9.1 Performance specifications
9.2 Validity of uncertainty statements <\/td>\n<\/tr>\n
143<\/td>\n9.3 Manufacturer\u2019s specifications <\/td>\n<\/tr>\n
144<\/td>\n9.4 Performance guide for hydrometric equipment for use in technical standard examples <\/td>\n<\/tr>\n
145<\/td>\n10 Guide for the drafting of uncertainty clauses in hydrometric standards
10.1 General
10.2 Equipment, methods and measurement systems
10.2.1 General
10.2.2 Equipment
10.2.3 Methods <\/td>\n<\/tr>\n
146<\/td>\n10.2.4 Systems
11 Examples
11.1 General
11.2 Uncertainty in water level measurement
11.2.1 Example 1: Float\/shaft encoder sensor installed in stilling well at gauging station <\/td>\n<\/tr>\n
147<\/td>\n11.2.2 Example 2: Pressure transmitter installed in tube
11.3 Uncertainty in flow measurement using flow measurement structures <\/td>\n<\/tr>\n
150<\/td>\n11.4 Uncertainty in flow measurement by current meter <\/td>\n<\/tr>\n
155<\/td>\nAnnex A (informative) Introduction to hydrometric uncertainty <\/td>\n<\/tr>\n
172<\/td>\nAnnex B (informative) Introduction to Monte Carlo Simulation (MCS) <\/td>\n<\/tr>\n
177<\/td>\nAnnex C (informative) Interpolated Variance Estimation (IVE) method <\/td>\n<\/tr>\n
181<\/td>\nAnnex D (informative) Performance guide for hydrometric equipment for use in technical standard examples <\/td>\n<\/tr>\n
184<\/td>\nAnnex E (informative) Uncertainty analysis of stage-discharge relation <\/td>\n<\/tr>\n
188<\/td>\nAnnex F (informative) Measurement of velocity <\/td>\n<\/tr>\n
193<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Tracked Changes. Hydrometric uncertainty guidance (HUG)<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n196<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":426300,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[265,2641],"product_tag":[],"class_list":{"0":"post-426290","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-120-20","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/426290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/426300"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=426290"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=426290"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=426290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}