锤子
消耗积分 : 10积分 移动终端:免积分
2.1 By means of a syringe, 2-mL of sample is introduced through a leak-proof entry port into the tightly closed small scale tester or directly into the cup which has been brought to within 3 °C (5 °F) below the expected flash point. 2.2 As a flash/no-flash test, the expected flash-point temperature may be a specification (e.g., 60 °C). For specification testing, the temperature of the apparatus is raised to the precise temperature of the specification flash point by slight adjustment of the temperature dial. After 1 minute, a test flame is applied inside the cup and note is taken as to whether the test sample flashes or not. If a repeat test is necessary, a fresh sample should be used. 2.3 For a finite flash management, the temperature is sequentially increased through the anticipated range, the test flame being applied at 5 °C (9 °F) intervals until a flash is observed. A repeat determination is then made using a fresh sample, starting the test at the temperature of the last interval before the flash point of the material and making tests at increasing 0.5°C (1°F) intervals. 2.4 For the complete instructions on how to conduct the ignitability test by this method, see Reference 4 below, "D 3278-96, Standard Test Methods for Flash Point of Liquids by Small Scale Closed-Cup Apparatus."
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