A:Product Introduction: DSHD-508 Ash Content Tester is designed according the national standard of People’s Republic of China GB/T17144 Test Method for Carbon Residue of Petroleum Products by Micro-method. Its function is to determine the carbon residue of petroleum products. DSHD-508 Ash Content Tester also could be suitable to determine the petroleum products composed of distillate oil which carbon residue is lower than 0.10%（m/m).But it should prepare 10%（V/V）distillation residue by method of GB/T6536 firstly and then doing determination with the instrument. The range of carbon residue determined with the instrument：0.10%（m/m）～30.0%（m/m）. To the products which carbon residue exceed 0.10%（m/m）,the test result is equivalent with the carbon residue tester(Conradson Method). B: Main technical specifications and parameters: 1.Power supply： AC220V ±10%、50Hz 2. Power consumption： ≤1600W 3.Temperature of coking box： 500℃ 4.Temperature controlling accuracy：±2℃ 5. Heating power：1500W 6. Ambient temperature： 5℃～35℃ 7. Relative humidity： ≤85%。 C:More Carbon Residue Tester: DSHD-268 Carbon Residue Tester (Conradson Method) DSHD-17144 Carbon Residue Tester(Micro-method) DSHD-30011 Carbon Residue Tester(Electric Furnace Method)