Part III Appendix
Electrical Safety Maintenance 266
Electrical safety check
6-Patient leakage current test
If the leakage current test on the new unit fails and the problem cannot be rectified, submit a
safety failure report to prove the system problem and remove this unit.
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 condition)
500 μA (single fault)
Electrical safety check
7-Patient leakage current under the condition of applied parts plus mains voltage
Overview
Patient leakage current test under the condition of applied parts plus mains voltage: In the case of
applied parts plus 110% mains voltage, select the applied part terminal by limiting the impedance
value. The leakage current test is performed between the selected applied part and the ground.
Under the displayed normal polarity and reversed polarity conditions, measure the leakage current
for the applied part plus 110% mains voltage.
The following output conditions are required for this test:
Normal Polarity;
Reversed Polarity
Press CAL (soft key 2) to perform calibration for the test of major applied parts.
1) Disconnect all patient leads and test the output connection between the leads and the DUT.
2) Press CAL to start calibration, as shown in the following figure:
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