5.11 If class I or class II tools have parts operating at safety extra-low voltage, such parts are checked
for compliance with the appropriate requirements specified for class III tools.
5.12 When testing electronic circuits, the supply is to be free from those perturbations from external
sources that can influence the results of the tests.
5.13 If, in normal use, the heating element cannot be operated unless the motor is running, the element
is tested with the motor running. If the heating element can be operated without the motor running, the
element is tested with or without the motor running, whichever is the more unfavourable. Heating elements
incorporated in the tool are connected to a separate supply unless otherwise specified.
5.14 For attachments performing a function which is within the scope of one of the relevant parts 2, the
tests are made in accordance with that part 2.
For other attachments, the tests are made in accordance with manufacturer’s instructions; in the absence
of such instructions, the tool is operated continuously at a load at which rated input or rated current is
attained.
5.15 If a torque is to be applied, the method of loading is chosen so as to avoid additional stresses, such
as those caused by side thrust. Additional loads necessary for the correct operation of the tool are,
however, taken into consideration.
If a brake is used for applying a load, it must be applied gradually to assure that the starting current does
not affect the test. Modification of output means for purpose of loading is permitted for the connection to
a brake.
5.16 Tools intended to be operated at safety extra-low voltage are tested together with their supply
transformer, if this is normally sold with the tool.
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