IEC 60884-1:2022 clause 8.8 figure 5 Test piston
8.8 Durability
The compression force is applied by means of a test piston which is wrapped with cotton comprising cotton wool covered by a piece of cotton medical gauze.
The test piston shall have the dimensions specified in Figure 5 and shall be made of an elastic material which is inert against the test liquids and has a Shore-A hardness of 47 ± 5 (for example synthetic rubber).
When it is not possible to carry out the test on the specimens due to the shape/size of the product or the marking is not accessible with the test piston:
– a suitable piece having the same characteristics as the product can be submitted to the test
or
– another test piston with different shape can be used on the condition that radius B is kept.
