Chauvin Arnoux MX535 [MX0535] Multifunction Tester, 1000V . Complete and lightweight, the MX 535 multifunction installation tester offers all the essential functions for checking the safety of electrical installations according to the applicable standards: NF C 15-100, FDC 16-600, EN 61557, etc. Particularly aimed at self-employed electricians, contractors, installers, certification organizations and maintenance teams, it offers a good price/performance trade-off. The MX 535 can be used to run automatic test sequences and store the results. Earth measurement is performed by the stake method with loop measurement.