Testing The Device Leakage Current; Figure 19Testing The Device Leakage Current (Connection Diagram For Vde 0751-1, Circuit Diagram) - Benning ST 755+ Operating Manual

9.5.5

Testing the device leakage current

The device leakage current test [} page 44] is intended to check medical electrical devices of
protection classes I and II for proper insulation capacity at mains voltage. This is to ensure that
no leakage current flows from the active components, the housing or accessible conductive
components to earth and that there is no risk of a dangerous electric flow via accessible
conductive components.
Requirements
• Approved safety measuring lines
• Please observe the requirements for measuring [} page 71].
• The test sample is disconnected from the mains.
• Make sure that you are familiar with the procedure for manual [} page 77] and automatic
[} page 76] testing.
• The test sample has passed the protective conductor resistance test [} page 79].
• Make sure that you know the necessary measuring points.
• The test sample has passed the insulating resistance test [} page 80].
• The measuring circuit of the setup must be closed.
• The test sample is connected according to the connection diagram.
Figure 19: Testing the device leakage current (connection diagram for VDE 0751-1, circuit diagram)
1 Direct current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components and applied
parts of the test sample.
2 Differential current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components and applied
parts of the test sample.
3 Alternative leakage current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components and applied
parts of the test sample.
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9.5 Individual tests
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