Valleylab Force FX-C - Checking Low Frequency Leakage Current

Figure 5-9.
Leakage current test circuit per
lEG 60601-1
Force FXTM-C Service Manual
Periodic Safety Check
Checking low Frequency leakage Current
Check the low frequency leakage current before returning the Force FX-C
generator to clinical usc.
Equipment required:
• DVM
• Leakage current tester.
1k ohms
10k ohms
1 millivolt'" 1 microamp
Output Receptacles and REM Source Current
1. Set the DVM to AC volts (200 m V) and COlmect the leakage current test
circuit.
2. TUTIl on the generator.
3. M.easure between all the output receptacles (including the Patient
Return Electrode receptacle) and earth ground. Record the largest
reading.
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 10 microamps. If the leakage current is
greater than 10 microamps, call the Villleylab Service Center.
6. Verify single fault conditions (ground open) the leakage current is less
than or equal to 50 microamps. If the leakage current is greater then
50 microamps, call the Valleylab Service Center.
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