Benning ST 755+ - Connecting the Safety Measuring Lines

9.2 Connecting the safety measuring lines
Testing
5284 / 08/2023 enBENNING ST 755+ / ST 760+74
Testing of medical electrical (ME) devices
• The insulating resistance must be measured before applying the direct current measuring
method for medical test samples of protection classesIandII.
• The I
PLeak
test must only be carried out after the protective conductor resistance test and the
insulating resistance test have been passed.
• When testing medical electrical devices and systems, consult a specialist who is familiar
with the application of the test sample.
• Additional measuring and testing devices might be required for complete functional testing
of medical electrical (ME) devices or systems.
• The patient leakage current is measured exclusively on the test sample and its applied
parts. Do not carry out any measurements on the patient!
• Tests of medical electrical test samples with multiple applied parts: Connect them one after
the other.
• Separate measurements of the patient leakage current of applied parts of typeB must only
be carried out if prescribed by the manufacturer.
9.2 Connecting the safety measuring lines
For certain tests and measurements, it is necessary to connect the safety measuring lines to the
device.
Requirements
• Please observe the requirements for measuring [}page71].
• Safety measuring lines
The safety measuring lines must be approved for the device (e.g. safety measuring lines
included in the scope of delivery) and be in a technically perfect and operationally safe
condition.
– Check the specifications regarding nominal voltage and nominal current.
– Check the insulation of the safety measuring lines.
– Check the safety measuring lines for continuity.
– Replace defective safety measuring lines.
• Protective caps (depending on the overvoltage category)
• During tests and measurements, only touch the safety measuring lines in the area intended
for your hands.