Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Instrument specification
4.1 Performance classifications
4.2 General
4.3 Maximum rate of change
4.4 Environment
4.5 Timing
5 Recording
5.1 Chart recorders
5.2 Data loggers
6 Enclosure
7 Installation
8 Estimation of measurement uncertainty
8.1 General
8.2 Type-A estimation
8.3 Type-B estimation
8.4 Level measurement datum
8.5 Combining primary measurement uncertainties
Annex A (informative) - Types of water level
measuring devices
A.1 Reference gauges
A.2 Peak level gauges
A.3 Mechanical float and counterweight gauges
A.4 Air reaction gauges
A.5 Electrical pressure transducers
A.6 Echo-location, acoustic instruments
A.7 Echo-location, radar instruments
A.8 Systems using electrical properties
A.9 Recording devices
Bibliography