NBN EN 61266 : 1996

Introduction
1. Scope
2. Normative references
3. Definitions
4. List of symbols
5. Configuration
6. Performance
6.1 Acoustic working frequency
7. Safety
8. Tests
8.1 Acoustic working frequency
8.2 Output power
8.3 Spatial-peak temoral-peak acoustic pressure
8.4 Effective area of the ultrasonic transducer active
     element
8.5 Overall sensitivity
9. Preferred method for reporting performance of
     existing equipment
10. Specifications for labelling
11. Sampling
Figures
Annexes
A. (informative) Choice of target and determination of
     target plane-wave reflection loss
B. (informative) Typical test equipment and test
     procedures
C. (informative) Determination of the two-way insertion
     loss of acoustic attenuators
D. (informative) Rationale
E. (informative) Bibliography
ZA. (normative) Normative references to international
     publications with their corresponding European
     publications

Establishes methods of measurement of performance of a complete ultrasonic hand-held Doppler foetal heartbeat detector. Deals with requirements for the performance of equipment and requirements for the reporting of existing equipment. Does not cover equipment design.