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Calibration Methods and Precautions for the Asphalt Softening Point Tester
2021-12-28
Verification method:
◆ Use a dial caliper to measure the distance between the lower edge of the support ring of the measuring instrument holder and the support plate.
◆ Use a steel ruler to measure the dimensions of the heat-resistant glass beaker used with the measuring instrument.
◆ Use an outside micrometer to measure the three diameters of the steel ball that are mutually perpendicular, then use an analytical balance to determine its weight.
◆Check whether the steel balls and sample ring surfaces are rusted or damaged.
◆ Use an outside micrometer to measure the dimensions of each part of the specimen ring shown in the diagram.
Precautions:
◆ The instrument must be handled and stored with care to avoid damaging glassware and thermometers.
◆ After each test is completed, the instrument must be wiped clean.
Features:
◆ The temperature is automatically controlled by the instrument, with no human error.
◆ External temperature probe with sensitive temperature response.
◆The speed is controlled using a PID plus fuzzy logic algorithm, with linear temperature ramp-up.
◆ Equipped with a backlit blue screen display for greater environmental friendliness and intuitiveness.
◆New design for a more convenient operation.
◆ Equipped with a magnetic stirring device for more uniform test temperatures.
◆ Automatically and manually record test results, and automatically calculate the average value.
Test steps:
◆ Use of the Display and Keyboard: The display consists of two sets—one on the left showing the time, and one on the right showing the temperature. Press the “Results” key to sequentially display the test results and the average value. Press the “Stir” key to start stirring with the magnetic stirrer; press the “Stir” key again to continue stirring. The stirring speed can be adjusted using the “Stir” button on the rear cover.
◆ During the test, the water or glycerin must be clear and free of impurities; otherwise, it will affect the optical path detection.
◆ Add water or glycerin up to the specified graduation mark.
◆ The heater must never be operated dry.
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