Covidien Force FX, Service Manual

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Confirming Outputs
5-24
Force FX Electrosurgical Generator C Service Manual
Chassis or Earth Leakage
1.
Set the DVM to AC volts (200 mV) and connect the leakage current test circuit.
2.
Turn on the generator.
3.
Measure between the chassis and earth ground.
4.
Determine the leakage current using the conventional 1 µA per 1 mV.
5.
Verify under normal conditions (ground closed, normal polarity) the leakage current is
less than 100 µA. If the leakage current is greater than 100 µA, call the Covidien
Service Center.
6.
Verify single fault conditions (ground open) the leakage current is less than or equal
to 300 µA. If the leakage current is greater than 300 µA, call the Covidien Service
Center.
Output Receptacles and REM Sink Current
1.
Set the DVM to AC volts (200 mV) and connect the leakage current test circuit.
2.
Turn on the generator and connect the end of the leakage current test circuit to
mains voltage through a 120 kΩ resistor.
3.
Connect the other side of the IEC leakage load to all of the output receptacles
(including the Patient Return Electrode receptacle).
4.
Determine the leakage current using the conventional 1 µA per 1 mV.
5.
Verify the leakage current is less than or equal to 20 µA. If the leakage current is
greater than 20 µA, call the Covidien Service Center.
Checking High Frequency Leakage Current
Check the high frequency leakage current and ground resistance before returning the
generator to clinical use. Check the leakage current:
• After calibrating the generator
• Every six months
Equipment required
• 200 Ω, 250 watt, noninductive resistor
• Current transformer
• True RMS voltmeter (Fluke 8920 or equivalent)
• Bipolar and monopolar footswitches
• Leakage table - per IEC 60601-2-2, Figure 104.