vi LigaSure Vessel Sealing Generator Service Manual
Low Frequency (50-60 Hz) Leakage Current (AAMI HF-18-1993) 4-6
High Frequency (RF) Leakage Current (IEC 60601-2-2) 4-6
Input Power 4-7
Power Cord Specification 4-7
Standards and IEC Classifications 4-8
Class I Equipment (IEC 60601-1) 4-8
Type CF Equipment (IEC 60601-1)/Defibrillator Proof 4-9
Liquid Spillage (IEC 60601-2-2, clause 44.3) 4-9
Static Electricity Discharge Interference (IEC 60601-1-2 and IEC 61000-4-2) 4-9
Electromagnetic Interference 4-9
Electromagnetic Compatibility (IEC 60601-1-2 and
IEC 60601-2-2)
4-9
Voltage Transients (Emergency Generator Mains Transfer) 4-10
Output Characteristics 4-14
Maximum Generator Output 4-14
Output Waveform 4-15
Output Power vs. Impedance Graphs 4-17
Chapter 5. Principles of Operation
Block Diagram 5-2
Functional Overview 5-3
Vessel Sealing 5-3
Bipolar Operation 5-3
Instant Response Technology 5-3
Control Board 5-4
Microcontrollers 5-4
Feedback Microcontroller 5-5
Feedback Microcontroller Memory 5-5
Shared RAM 5-6
I/0 Expansion 5-6
Keyboard Interface and Activation Inputs 5-6
Power Supply Supervisor Circuit 5-6
A/D and D/A Conversion 5-7
Waveform Generation (T_ON) 5-7
T_ON Average Check 5-7
Audio Alarm 5-8
Serial Interface 5-8
Dosage Error Algorithm 5-8
Instant Response Algorithm 5-9
Front Panel 5-10
Membrane Keyboard 5-10
Power Switch 5-10
Display Board 5-10
RF Indicator Lamps 5-10
LED and Seven-Segment Display Drivers 5-11
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