A:Product Introduction: 　DSHD-508 Ash Content Tester is designed and made as per the national standard of People’s Republic of China GB/T508 Test Method for Ash Content of Petroleum Products. The function of DSHD-508 Ash Content Tester is to determine ash content in the petroleum products as per GB/T508. It could not be used to determine ash content in the petroleum products containing ash-forming additives (including additives containing certain phosphorus compounds), lubricating oils containing lead and used engine crankcase oils. B: Main technical specifications and parameters: (1) Resistance furnace 1. Rated power: 2.5 kW 2. Power supply: AC220V±10%, 50 Hz 3. Heating range: ambient temperature～1000℃ 4. Controlling temperature: 775±25℃ 5. Temperature controlling device: thermocouple 6. Temperature rising time: ≤60 min 7. Furnace temperature uniformity: ≤15℃ 8. Ambient temperature: 5℃～40℃ 9. Relative humidity: ≤80% 10. Furnace chamber size (mm): 200mm×120mm×80mm (L×W×H) (2) Heating plate 1. Power supply: AC220V±10%, 50Hz 2. Rated power: 2.5 kW 3. Heating mode: by three groups of heater. The power of each group is 0.8 kW. They can be used separately or at the same time. 4. Height above sea level at working site: not higher than 1000 meter 5. Ambient temperature: 5℃～40℃; 6. Relative humidity: ≤ 80% 7. Plate size: 450mm×350 mm (3) Ceramic crucible Size: 50 ml, 100 ml