T/CHES 45-2020 in English

本文件规定了雷达水位计的结构组成、基本参数、技术要求、数据采集与传输、试验方法、检验规则以及安装、运行维护、考核与验收等。本文件提供了雷达水位计科研、设计、生产、检测和使用等各方面文件的编制指南。本文件适用于江、河、湖泊、水库、明渠、环保污水、储水池（罐）等水位监测使用的雷达水位计。

Scope

Foreword...........................................................................................................................................................................IVIntroduction...............................................................................................................................................................................VScope....................................................................................................................................................................................1Normative References.............................................................................................................................................................1Terms, Definitions, Symbols, Codes, and Abbreviations.................................................................................................1.1Terms and Definitions..............................................................................................................................................1.2Symbols, Codes, and Abbreviations..................................................................................................................4General Provisions...............................................................................................................................................................5Principles of Operation, Classification, and Composition.................................................................................................5.1Principle of Operation............................................................................................................................................5.2Classification.........................................................................................................................................................5.3Composition........................................................................................................................................................6Basic Parameters.................................................................................................................................................................7Technical Requirements........................................................................................................................................................8.1Appearance.............................................................................................................................................................8.2Working Environment Conditions......................................................................................................................8.3Measurement Characteristics..................................................................................................................................8.4Display and Recording..........................................................................................................................................9Response Time....................................................................................................................................................................9Electrical Performance...........................................................................................................................................................10Emission Center Frequency.................................................................................................................................................10Salt Fog Test.......................................................................................................................................................................10Protection Class of Outer Enclosure..................................................................................................................................10Interference Resistance......................................................................................................................................................10Mechanical Environmental Adaptability.......................................................................................................................10Data Collection and Transmission Requirements...............................................................................................................10Modbus-RTU Communication Protocol...........................................................................................................................11Transmission Message Specification..............................................................................................................................14Test Methods........................................................................................................................................................................15.1Test Requirements....................................................................................................................................................15.2Main Test Equipment.............................................................................................................................................15.3Content of Test Method..........................................................................................................................................16Inspection Rules......................................................................................................................................................................17Factory Inspection.................................................................................................................................................................17Type Inspection...................................................................................................................................................................18Marking and User Manual.......................................................................................................................................................18Packaging, Transportation, and Storage.............................................................................................................................18Installation, Debugging, Operation, and Maintenance.....................................................................................................19Test and Acceptance............................................................................................................................................................20Appendix A (Informative) Modbus-RTU Communication Protocol Example...........................................................................21Appendix B (Informative) Radar Water Level Meter Transmission Message Specification Example......................................22Appendix C (Informative) Typical Installation of Radar Water Level Meter.........................................................................31References................................................................................................................................................................................32