Test procedures

Multilayer actuators are tested during manufacturing and in final inspection before shipment. The tests and requirements shown in the table below are performed as standard. Additional tests and requirements can be agreed upon in cooperation with the customer.
 

 

Test	Procedure	Sampling	Requirements
Mechanical dimensions	Dimensions are measured with micrometer screw or calliper gauge depending on the size		Depends on dimensions and the product type. In most cases ±0,1 mm or ±2%, whichever is the largest.
Displacement	Displacement at maximum recommended voltage measured with LVDT	AQL 0.65	Depends on dimensions and product type. In most cases displacement within ±15% of specified value.
Capacitance	1kHz; 1,0Vrms	100%	Depends on dimensions and product type. In most cases capacitance within ±15% of specified value.
Dielectric loss factor	1kHz; 1,0Vrms	100%	Depends on dimensions and product type. In most cases dielectric loss within ±15% of specified value.