EN 61847:1998

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 List of symbols
5 General measurement requirements
    5.1 Operating conditions
    5.2 Load conditions
    5.3 Preparation for measurements
6 Measurement procedures
    6.1 Primary tip vibration excursion
    6.2 Secondary tip vibration excursion
    6.3 Drive frequency
    6.4 Tip vibration frequency
    6.5 Derived output acoustic power and output acoustic
          power
    6.6 Directivity pattern
    6.7 Primary tip vibration excursion modulation
    6.8 Duty cycle
    6.9 Quiescent electrical power
    6.10 Maximum electrical power
    6.11 Primary acoustic output area
    6.12 Secondary acoustic output area
    6.13 Power reserve index
7 Declaration of output characteristics
Figures
Annexes
A Measurement methods and conditions
B Theory of operation of ultrasonic surgical devices
C Bibliography
ZA Normative reference to international publications with
    their corresponding European publications

This standard specifies: - the essential non-thermal output characteristics of ultrasonic surgical units; - methods of measurement ot these output characteristics; - those characteristics which should be declared by the manufacturers of such equipment. This standard is applicable to equipment which meets the requirements of a, b and c below: a) ultrasonic surgical systems operating in the frequency range 20 kHz to 60 kHz; and b) ultrasonic surgical systems, whose use is the fragmentation or cutting of human tissue, whether or not those effects are delivered in conjunction with tissue removal or coagulation; and c) ultrasonic surgical systems, in which an acoustic wave is conducted by means of a specifically designed wave guide to deliver energy to the surgical site.