Hengaode InstrumentGBT8026The operation steps and principles of the petroleum grease droplet melting point tester are as follows

operating steps

‌Instrument preparation and calibration‌Check if the device's power connection, heating system, temperature control system, and sensors are functioning properly; Some instruments require preheating20Minutes to reachGB/T8026Stable state; Use a standard thermometer or manual calibration function for calibration.‌

‌Sample processing‌Cut the petroleum grease sample into uniform blocks or flakes, ensuring no bubbles or impurities; Load an appropriate amount of sample into a heat-resistant glass test tube or a dedicated sample tank, and the quantity should meet the requirements of the instruction manual.‌

‌Parameter Settings‌Set the starting temperature (e.g148℃）Heating rate (usually1-2℃/min）And stop temperature; Select automatic testing mode or call the preset heating method.‌

‌test process‌After the temperature stabilizes to the starting point, place the sample in; Start heating, the instrument automatically monitors the melting process of the sample; When the first drop of liquid drips from the narrow opening of the grease cup, record the temperature value (the instrument will automatically record in automatic mode, and manual mode requires every15Observe once per second.‌

‌Data recording and maintenance‌After the test is completed, record the melting point temperature of the droplet; Some instruments support data export and analysis; Clean the sample tube and heating components in a timely manner, and calibrate the instrument regularly to ensure accuracy.‌

principle

This instrument is based on the principle of heating the sample to the melting critical point: heating it through an oil bath or air bath at a constant rate (such as1-2℃/min）Heating up; The temperature sensor monitors the status of the sample in real time. When the first droplet of liquid drops, the temperature at that moment is recorded as the melting point of the droplet.‌

3 Sample pretreatment needs to ensure uniform melting and removal of bubbles to improve measurement accuracy