Periodic Safety Check
5-22 Force FX-8C 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 Valleylab 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 Valleylab 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 Valleylab Service Center.
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