This document applies to all devices used for butt fusion of plastic pipes and fittings. The calibration involves the operation of the welding equipment. Additionally, national safety regulations shall be observed. The pressure gauge shall be calibrated. The accuracy of the pressure gauge shall be 1 % of full scale.
Information technology - Data interchange on 90 mm flexible disk cartridges using modified frequency modulation recording at 31 831 ftprad on 80 tracks on each side - ISO Type 303
Information technology - 3,81 mm wide magnetic tape cartridge for information interchange - Helical scan recording - DDS-DC format using 60 m and 90 m length tapes