BS EN ISO 6416:2017 – TC:2020 Edition
$258.95
Tracked Changes. Hydrometry. Measurement of discharge by the ultrasonic transit time (time of flight) method
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 153 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 89 | undefined |
| 91 | European foreword Endorsement notice |
| 94 | Foreword |
| 95 | 1 Scope 2 Normative references 3 Terms and definitions 4 Applications 4.1 Types of applications |
| 96 | 4.2 Attributes and limitations 5 Method of measurement 5.1 Discharge |
| 97 | 5.2 Calculation of discharge from the transit-time measurement 6 Flow velocity determination by the ultrasonic (transit time) method 6.1 Principle |
| 99 | 6.2 Sound propagation in water 6.2.1 General |
| 100 | 6.2.2 Speed of sound in water 6.2.3 Propagation losses |
| 102 | 6.2.4 Signal path bending |
| 103 | 6.2.5 Reflection |
| 104 | 7 Gauge configuration 7.1 General 7.2 Single-path systems |
| 105 | 7.3 Multi-path systems 7.4 Crossed-path systems |
| 107 | 7.5 Reflected-path systems |
| 108 | 7.6 Systems using transponders |
| 109 | 7.7 Wireless systems (if a cable crossing is not possible) |
| 110 | 7.8 Systems using divided cross-sections 7.9 Sloping paths |
| 111 | 8 Determination of discharge 8.1 Single-path systems |
| 112 | 8.2 Multi-path systems 8.2.1 General |
| 113 | 8.2.2 Mid-section method |
| 114 | 8.2.3 Mean-section method |
| 115 | 8.3 Systems with transducers in the channel |
| 116 | 9 System verification and calibration |
| 117 | 10 Site selection 11 Site survey — Before design and construction 11.1 General 11.2 Visual survey |
| 118 | 11.3 Survey of the cross-section 11.4 Survey of velocity distribution 11.5 Survey of signal propagation 12 Operational measurement requirements 12.1 General |
| 119 | 12.2 Basic components of flow determination 12.3 Water velocity determination 12.4 Determination of water stage or depth |
| 120 | 12.5 Determination of mean bed level |
| 121 | 12.6 Channel width 13 Gauging station equipment 13.1 General |
| 122 | 13.2 Design and construction of equipment 13.2.1 Transducers |
| 123 | 13.2.2 Transducer cables 13.3 Reflectors |
| 126 | 13.4 Civil engineering works 13.5 Signal timing and processing 13.5.1 General 13.5.2 Signal-to-noise ratio |
| 127 | 13.5.3 Signal maintenance (gain control) 13.5.4 Signal detection |
| 128 | 13.5.5 Post-detection filtering 13.6 System self-checking |
| 129 | 13.7 Site-specific data (or site parameters) 13.8 Clock and calendar 13.9 System performance criteria 13.9.1 General |
| 130 | 13.9.2 Operating environment 13.9.3 Water environment 13.9.4 Mechanical environment 13.9.5 Extreme environmental conditions 13.9.6 Power source 13.9.7 Measurement uncertainty |
| 131 | 13.10 System output 13.10.1 Local display 13.10.2 Local record 13.10.3 Remote record 13.10.4 Diagnostic information 13.11 Installation |
| 132 | 13.12 Commissioning 13.13 Operating manual |
| 133 | 13.14 Maintenance |
| 134 | 14 Measurement uncertainties 14.1 General 14.2 Definition of uncertainty |
| 135 | 14.3 Uncertainty in discharge 14.3.1 Uncertainty equation |
| 136 | 14.3.2 Effective number of paths 14.3.3 Uncertainty in the line velocity, Ulv 14.3.4 Uncertainty in the channel width estimation, Uw |
| 137 | 14.3.5 Examples of uncertainty estimation |
| 138 | 14.3.6 Uncertainty estimate at low flow |
| 139 | 14.3.7 Uncertainty estimate at high flow |
| 141 | Annex A (informative) Principle of measurement uncertainty |
| 148 | Annex B (informative) Performance guide for hydrometric equipment for use in technical standard examples |
| 152 | Bibliography |
