SN EN 61689 : 1996
Current
The latest, up-to-date edition.
ULTRASONICS - PHYSIOTHERAPY SYSTEMS - PERFORMANCE REQUIREMENTS AND METHODS OF MEASUREMENT IN THE FREQUENCY RANGE 0,5 MHZ TO 5 MHZ
01-12-2013
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 List of symbols
5 Requirements for safety and performance declaration
6 Performance and safety requirements
6.1 Rated output power
6.2 Effective intensity
6.3 Beam non-uniformity ratio
7 Conditions of measurement and test equipment used
7.1 Test vessel
7.2 Hydrophone
7.3 RMS or peak signal measurement
8 Type testing reference procedures and measurements
8.1 Rated output power
8.2 Hydrophone measurements
8.3 Effective radiating area
8.4 Reference type testing parameters
8.5 Acceptance criteria for reference type testing
9 Routine measurement procedure
9.1 Rated output power
9.2 Beam cross-sectional area at zp
9.3 Acceptance criteria for routine testing
10 Sampling and uncertainty determination
10.1 Reference type testing measurements
10.2 Routine measurements
10.3 Uncertainty determination
Annexes
A Raster scan measurement and analysis procedures
B Diametrical or line scan measurement and analysis
procedures
C Rationale concerning the beam cross-sectional area
definition
D Factor used to convert the beam cross-sectional area
(ABCS) at the face of the treatment head to the
effective radiating area (AER)
E Rationale behind using a limiting value for the beam
non-uniformity ratio (RBN)
F Rationale behind using a limiting value for the beam
non-uniformity ratio (RBN)
G Determining acoustic power through radiation force
measurements
H The validity of low-power measurements of the beam
cross-sectional area (ABCS)
J Influence of hydrophone effective diameter
K Relationship between the effective radiating area (AER)
and the effective radiating area determined using the
FDA definition
L Guidance on uncertainty determination
M Bibliography
ZA (normative) Normative references to international
publications with their corresponding European
publications
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.