Testing the Generator
Setup, Tests, and Adjustments
LigaSure Vessel Sealing Generator Service Manual 6-13
6. Verify that the generator output is 705 ± 53 mA rms (50 W ± 7.5 W).
If the output is outside the specified range, calibrate the generator as
described in calibration steps 4, 5, 6, and 7. Then repeat this procedure. If the
output remains outside the specified range, call the Valleylab Service Center.
Checking Low Frequency Leakage Current and Ground
Resistance
Check the low frequency leakage current and ground resistance before returning
the LigaSure generator to clinical use.
Equipment
• DVM
• Leakage current test circuit
Figur e 6 - 1 .
The leakage current test circuit per
IEC 60601-1
Output Receptacles Source Current
1. Set the DVM to AC volts (200 millivolts [mV]) and connect the leakage
current test circuit.
2. Turn on (|) the generator.
3. Measure between all the output receptacles and earth ground. Record the
largest reading.
4. Determine the leakage current using the conventional one microamp per one
mV.
5. Verify under normal conditions (ground closed, normal polarity) the leakage
current is less than 10 microamps (µA). If the leakage current is greater than
10 µA, call the Valleylab Service Center.
6. Verify single fault conditions (ground open) the leakage current is less than or
equal to 50 µA. If the leakage current is greater than 50 µA, call the Valleylab
Service Center.
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