EN 14769 ASTM D6521 AASHTO R28 VDO removes air bubbles created during the in-service oxidative ageing of asphalt binder by the PAV. VDO Feautures include: 3 operating modes: Fully Automatic, Semi-Automatic and Manual. Temperature is measured by Platinum RTD. Over temperature limit switch. Automatic release of the pressure at the end of the test. Double vessel to insert 4 or 8 samples. Fast heating and vacuum system to reach set point. USB port on front unit with software upgrades and data storage. Power supply: 230V 1ph 50Hz Dimensions: 430x450x470 mm approx Weight: 30 kg approx.