Revision:1.0(2023-01-12)
438
Electrical Safety Inspection
5-Ground leakage current test
Figure9–2 Testing the earth leakage current
• FAIL
Check the short circuit conditions of the Y capacitor of the power module. If the Y capacitor
partially fails, replace it.
Check the damage of the power module. If it partially fails, replace it.
Check whether grid power cables are bent, in bad contact, or damaged.
Test the AC current output on the wall. Check that the ground is good and no cable exceptions
occur. Notify the user or owner to correct related deviations. Check whether any surrounding
operating power output can be used for substitution.
Replace the probe to check whether the failure is caused by the main unit.
If the leakage current test on the new component fails and the problem cannot be rectified,
submit a safety failure report to prove the system problem and remove this component.
If the test fails on other units, stop using the device and notify customer service engineers to
analyze or handle the problem.
Limit
IEC60601-1: 500 μA (normal state).
1000 μA (single fault condition)
Electrical Safety Inspection
6-Patient leakage current test
Overview
The patient leakage current test aims to test the leakage current between the applied part and
the ground. All measurements can adopt the RMS value.
Diagnostic Ultrasound System
Service Manual
9 Appendix
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