The safety testers SEFELEC 56-S and SEFELEC 506-S from EATON allow dielectric strength tests in AC and DC, insulation measurements and protective conductor tests to be carried out; Thanks to the DSP technology and the DUAL-ARM-Core architecture, a high level of stability and repeatability is achieved. The high accuracy and measuring speed are suitable for quality control or entry control departments. The sequence mode makes the SEFELEC 56-S and 506-S easier to use and to integrate into a control system or test bench.