SN EN 61161 : AMD 1 1998

Introduction
1 Scope
2 Normative references
3 Definitions
4 List of symbols
5 Requirements for radiation force balances
5.1 General
5.2 Target type
5.3 Target diameter
5.4 Microbalance/Force measuring system
5.5 System tank
5.6 Target support structures
5.7 Transducer positioning
5.8 Anti-streaming foils
5.9 Transducer coupling
5.10 Calibration
6 Requirements for measuring conditions
6.1 Lateral transducer position
6.2 Transducer/Target separation
6.3 Water
6.4 Water contact
6.5 Environmental conditions
6.6 Thermal drifts
7 Measurement uncertainty
Figures
Annexes
A Basic formulae
B Other methods of ultrasonic power measurement
C Bibliography
ZA (normative) Other international publications
      quoted in this standard with the references of the
      relevant European publications

Specifies a method of determining the total radiated acoustic power of ultrasonic transducers based on the use of a radiation force balance. Establishes general principles for the use of radiation force balances in which an obstacle (target) intercepts the sound field to be measured. Coverage includes: target type, target diameter, transducer positioning, transducer coupling, water contact, environmental conditions, and thermal drifts. Also gives definitions, diagrams and annexes.