1 Scope
This part of GB/T 11828 specifies the terms and definitions, classification, technical requirements, test methods, inspection rules, marking, instructions for use, packaging, transportation and storage of the ultrasonic stage gauge.
This part is applicable to the ultrasonic stage gauge for measuring the stage of rivers, lakes, reservoirs, channels and other water bodies.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 9359 Basic conditions and methods of environmental test for hydrological instrument
GB/T 9969 General principles for preparation of instructions for use of industrial products
GB/T 17626.5-2008 Electromagnetic compatibility — Testing and measurement techniques — Surge immunity test
GB/T 17626.8 Electromagnetic compatibility — Testing and measurement techniques — Power frequency magnetic field immunity test
GB/T 18185 Specification of reliability for hydrologic instruments
GB/T 18522.2 General specification for hydrometric instruments — Part 2: Referential operating condition
GB/T 19677 Essential technical terms and symbols for hydrologic instrument
GB/T 19705 Signals and interfaces of hydrometry instruments
GB/T 27993 General technical conditions for stage measuring instruments
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 19677 and the following apply.
3.1
ultrasonic stage gauge
instrument for measuring the stage by measuring the propagation time utilizing the principle that ultrasonic waves reflect when encountering medium interfaces with different densities
3.1.1
liquid medium ultrasonic stage gauge
ultrasonic stage gauge with water body as ultrasonic propagation medium (3.1)
3.1.2
gas medium ultrasonic stage gauge
ultrasonic stage gauge with air as ultrasonic propagation medium (3.1)
3.2
acoustic path
area effectively covered by ultrasonic waves when they propagate directionally in a medium
Foreword iii
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and structural composition
4.1 Classification
4.2 Structural composition
5 Requirements
5.1 Working environment
5.2 Main technical parameters of equipment
6 Test conditions and methods
6.1 Test conditions
6.2 Test requirements
6.3 Test method
7 Inspection rules
7.1 End-of-manufacturing inspection
7.2 Type inspection
8 Marking and instructions for use
8.1 Marking
8.2 Instructions for use
9 Packaging, transportation and storage
9.1 Packaging
9.2 Transportation
9.3 Storage
