Valleylab Force FX-C - Page 100

Periodic Safety Check
5-22
Chassis or Earth Leakage
1. Set the DVM to AC volts (200 m V) 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 microamp per
1 millivolt.
5. Verify under normal conditions (ground closed, normal polarity) the
leakage current is less than 100 microamps. If the leakage current is
greater than 100 microarnps, call the Valleylab Service Center.
6. Verify single fault conditions (ground open) the leakage current is less
than or equal to 300 microarnps. If the leakage current is greater than
300 microamps, call the Valleylab Service Center.
Output Receptacles and REM Sink Current
1. Set the DVM to AC volts (200 m V) 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 kQ 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 microamp per
1 millivolt.
5. Verify the leakage current is less than or equal to 20 microamps. If the
leakage current is greater than 20 microamps, call the Valleylab Service
Center.
Force FX!M-C Service Manual