Asphalt flash point tester is a testing instrument suitable for Cleveland Open Cup (COC) to measure the flash point and ignition point of viscous petroleum pitch, coal pitch, and liquid petroleum pitch materials with flash points above 79 ° C to assess construction safety. When using.
★ Power supply: 220V ± 10% 50H
★ Ambient temperature: -10 ℃ ~ 50 ℃
★ Relative humidity: ≤85%
★ Automatic scanning and ignition;
★ Electric furnace heating power is continuously adjustable from 0 ~ 400W;
★ The heating wire is protected by a transparent quartz tube, no open flame, explosion-proof, and fast heating speed;
★ Dimensions; 500X400X300mm
Third, installation and use:
★ Open the packing box, check the appearance of the instrument and related accessories according to the complete set of equipment and technical documents. If there is no damage or missing, install as shown in the figure.
★ Check if the power supply is well grounded.
★ Turn on the power switch, the indicator light is on, and then the test operation can be performed.
★ Wash and dry the sample cup with solvent and install it on the holder.
★ Install the thermometer, insert the thermometer vertically into the sample cup, the mercury ball of the thermometer is about 6.5mm from the bottom of the cup, and the position is 16mm from the edge of the cup on the side opposite to the igniter.
★ After preparing the sample, pour it into the sample cup to the marked line, and keep the other parts of the sample cup free of asphalt. (Note: The sample heating temperature cannot exceed 55 ° C below the flash point)
★ All devices should be placed in a place with dark indoor lighting and no significant air circulation, and surrounded by wind screens on three sides.
★ Connect the igniter to a flammable full pressure vessel (such as liquefied propane gas or natural gas) with a hose, turn the igniter to one side, test the ignition, and debug the flame into the shape of a standard ball or a small ball with a diameter of 4mm ± 0.8mm Flame test.
Fourth, test steps:
★ Start the heating test to make the temperature rise rate quickly reach 14 ℃ / min ~ 17 ℃ / min. When the temperature of the sample reaches 56 ° C before the expected flash point, adjust the heater to reduce the heating rate so that the temperature can be controlled at 5.5 ° C / min ± 0.5 ° C / min at 28 ° C before the expected flash point.
★ When the temperature of the sample reaches 28 ℃ before the expected flash point, press the igniter button once every 2 ℃ to make the flame of the igniter sweep horizontally along the mouth of the test cup with a radius of 150mm and from one side The elapsed time to the other side is about 1s. At this time, it should be confirmed that the test flame of the igniter is a fireball with a diameter of 4mm ± 0.8mm, and is located 2.5mm above the mouth of the test cup. (Note: the test cup should not be exhaled during the test)
★ When the blue flame that flashes out at the beginning of A on the sample liquid surface, immediately read the temperature from the thermometer and use it as the flash point of the sample. Be careful not to mistake the blue and white flame around the test flame as a flash point flame.
★ Continue heating, keep the temperature rising rate of the sample at 5.5 ℃ / min ± 0.5 ℃ / min, and use the igniter for ignition test according to the above operation requirements.
★ When the sample immediately ignites upon contact with the flame and can continue to burn for no less than 5s, stop heating and read the temperature on the thermometer as the ignition point of the sample.
★ At least two parallel tests of the same sample, the difference between the two measurement results does not exceed the allowable difference of 8 ℃, the integer of the average value is taken as the test result.
★ Precision or tolerance:
The allowable difference of repeatability test is: flash point 8 ℃, ignition point 8 ℃;
The permissible difference of the reproducibility test is: flash point 16 ° C, ignition point 14 ° C.