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SME-500S is a tester specially designed for testing the ionic contamination content on the surface of PCB\PCBA.According to the method of ionic contamination degree test defined in IPC-TM-650, the test process includes 3 processes: solvent regeneration, ion contamination solvent extraction and ion contamination degree measurement.

The SME-500D is an automatic testing instrument specifically designed for measuring the surface ion contamination content of PCBs and PCBA. It can be used for testing the ion contamination levels on PCBA, PCB, and copper-clad boards. The SME-500D is a dynamic testing instrument.