Design of testing Method of Fuels Filling Measurement Instrument Ratna Purwaningsih, Susatyo Nugroho Widyo Pramono, Farhan Atoilah, Aan Aria Nanda and Azizah Dewi Suryaningsih E3S Web Conf., 202 (2020) 11001 Published online: 10 November 2020 DOI: 10.1051/e3sconf/202020211001