SN EN 61847 : 1998

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

Defines the essential non-thermal output characteristics of ultrasonic surgical units.