BS EN 61206:1995

INTRODUCTION
SECTION 1: GENERAL
Clause
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Symbols
SECTION 2: OVERALL TESTS OF COMPLETE SYSTEMS
2.1 General considerations
      2.1.1 Types of Doppler ultrasound systems
      2.1.2 Worst case conditions
2.2 Initial conditions
      2.2.1 Power supply
      2.2.2 Test frequency, general conditions
      2.2.3 Working distance
      2.2.4 Zero-signal noise level
2.3 Doppler frequency response
      2.3.1 Frequency response range
      2.3.2 Doppler frequency accuracy
      2.3.3 Large-signal performance
2.4 Spatial response
      2.4.1 Axial response
      2.4.2 Lateral response
2.5 Operating frequency
      2.5.1 Acoustical measurement
      2.5.2 Electrical measurement
2.6 Flow direction separation
      2.6.1 Channel separation
      2.6.2 Simultaneous flow
2.7 Response to Doppler spectrum
      2.7.1 Volume-flow circuits
      2.7.2 Maximum-frequency followers
SECTION 3: SPECIAL DOPPLER TEST OBJECTS
3.1 Doppler test objects
      3.1.1 String Doppler test object
      3.1.2 Band Doppler test object
      3.1.3 Disk Doppler test object
      3.1.4 Piston Doppler test object
      3.1.5 Small ball test object
      3.1.6 Flow Doppler test object
      3.1.7 Water tank (or gel block)
Annexes
A (informative) Description of continuous-wave Doppler
   ultrasound systems
B (informative) Rationale
C (informative) Bibliography
ZA (normative) Other international publications quoted in
   this standard with the references of the relevant
   European publications

Gives guidance on test methods for measuring performance for flow meters, velocimeters and foetal heart detectors and describes special Doppler test objects applicable to the testing of Doppler ultrasound which are not disassembled or disconnected.