Technical requirement: 1) The outside surface of the ceramic parts should be glazed. Cracks, dark
Technical requirement:1) The outside surface of the ceramic parts should be glazed. Cracks, dark spots and foreign inclusions, cut-offs under 0.5mm and less than 0.2mm deep; non-glazed surface points under 1mm less than 2 pieces2) Internal or external metallization leakage lower than 0.5 mm from the end-walls and under 1.0mm 3) The cases are hermetically sealed4) Metal surfaces of the cases are nickel-plated, with coating thickness more than 7mmStability requirements:1) The cases are stable to the test voltage with the industrial frequency of 50Hz2) The cases are stable to the temperature change from -70° C to +200° C3) The cases are stable to the following mechanical loads: a) Sine vibration, frequencies 10-2,000Hz, acceleration 20gb) Mechanical shock (multiple), peak shock acceleration 150g, duration 3±1msc) Mechanical shock (single), peak shock acceleration 1,000g, duration 1±0.3msd) Rated linear acceleration: long-term=47,088ms-2(4,800)g, short-term=66,708ms-2 (6,800)g, perpendicular to the axis of symmetry4) Solder strength requirements of copper cuff: on application of stretching force between ceramic insulator and copper bushing breach are on copper cuff
