Electrical Safety Testing
4 Testing and Maintenance
49
This measures the impedance of the Protective Earth (PE) terminal to all exposed metal parts of the
Device under Test (DUT), which are for safety reasons connected to the Protective Earth (PE).
You can find metal parts of the device at the equipotential connector.
Measurements shall be performed using a measuring device capable to deliver a current of at least
200 mA into 500 mOhms with maximum open circuit voltage of 24V
This safety test is based on IEC/EN 62353.
Report the highest value (X1).
N O T E
• If the protective earth resistance test fails, testing must be discontinued immediately and the device
under test must be repaired or labeled as defective.
• All values for current and voltage are the root mean square (r.m.s.) values, unless otherwise stated.
• Flex the power cord during the protective earth resistance test to evaluate its integrity. If it does not
pass the test, exchange the power cord. Then repeat the test. If it still does not pass, follow the
instructions in the first bullet point of this note above.
S(2) Equipment Leakage Current Test - Normal Condition
Test to perform:
Measuring circuit for the measurement of Equipment Leakage Current -
Direct method
according to
IEC/EN 62353.
This test measures leakage current of accessible conductive and non-conductive metal parts of the
monitor and the functional earth leakage current. It tests normal and reversed polarity. Perform the test
with S1 closed (Normal Condition).
There are no parts of the equipment that are not protectively earthed. Disconnect any data cables and
any connections that may provide an extraneous earth path. Test the device under test (DUT) on an
insulated surface. Do not touch the DUT during testing.
Test
Expected test results
Protective Earth Resistance Test (with
mains cable)
X1 <= 300mOhms