Chauvin Arnoux F402 [P01120942] 1000A AC TRMS Clamp Meter. The F401 clampmeter is designed for medium-power low-voltage applications in sectors such as LV electricity production and distribution, industry, railways. This clamp multimeter is also suitable for lift/elevator technicians and other lifting and transport specialists. The applications for the clamp multimeter are maintenance, testing, monitoring, diagnostics and connection.