BS EN 17277:2019
$102.76
Hydrometry. Measurement requirements and classification of rainfall intensity measuring instruments
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 22 |
This document considers liquid atmospheric precipitation and defines the procedures and equipment to perform laboratory and field tests, in steady-state conditions, for the calibration, check and metrological confirmation of liquid precipitation measurement instruments. It provides a classification of catching-type measurement instruments based on their laboratory performance. The classification does not relate to the physical principle used for the measurement, nor does it refer to the technical characteristics of the instrument assembly, but is solely based on the instrument calibration. Attribution of a given class to an instrument is not intended as a high/low ranking of its quality but rather as a quantitative standardized method to declare the achievable measurement accuracy in order to provide guidance on the suitability for a particular purpose, while meeting the user’s requirements.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 10 | 4 User requirements for RI measurements 5 Measurement of RI 5.1 General 5.2 RI measurement accuracy |
| 11 | 5.3 Types of rain gauge |
| 12 | 6 Classification of RI gauges 6.1 Criteria for rain gauge classification |
| 16 | 6.2 Check of the balancing of the buckets 6.3 Consistency of information 6.4 Characteristics of the device used to generate the equivalent reference intensity 6.4.1 Overview 6.4.2 Metrological characteristics 6.5 Testing procedure 6.5.1 Dynamic calibration |
| 17 | 6.5.2 Step response (time constant) for weighing rain gauges 6.5.3 Balancing of the buckets |
| 18 | 6.5.4 Re-calibration |
| 19 | 6.5.5 Verification of the calibration in the field 6.5.6 Characteristics of the Class Attribution Certificate |
