Revision:1.0(2023-01-12)
440
Electrical Safety Inspection
6-Patient leakage current test
Figure9–3 Patient leakage current
• NOTICE
Except the probe, if the device uses ECG, the patient leakage current should also be tested.
If the adopted current test standard does not incorporate the DC value of the patient leakage
current, or the DC option is unavailable, the measured DC value cannot be obtained through
the APPLIED PART soft key.
• FAIL
Check whether the application parts are damaged and replace the failed part.
Check whether the ECG is damaged and replace the failed part.
Check whether the power unit is damaged. If it partially fails, replace the failed part.
Check whether grid power cables are bent, in poor 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
All countries
Applicable to the ECG input and probe of the BF type device:
100 μA (normal)
500 μA (single fault condition)
Diagnostic Ultrasound System
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