Oil absorption testerMainly used for oil absorption detection equipment of carbon black, conductive carbon black, graphite (negative electrode material), silica (white carbon black), and other powder materials. Working principle: By using high-precision torque sensors to monitor the torque changes during the liquid addition process, analyze the phase transition of the sample from liquid to solid, and calculate the oil absorption value.
The core of calibrating the oil absorption value tester to ensure accuracy lies in regularly calibrating the torque sensor and titration system, and strictly following the operating specifications. The following are the key steps and precautions:
Calibration of torque sensor:
This is the foundation for ensuring accurate calculation of oil absorption values. It is necessary to use standard weights for zero calibration and full-scale calibration of the sensor to ensure that the linearity and accuracy within its measurement range meet the requirements.
Environment and sample control:
Before calibration, ensure that the instrument is placed in a stable and vibration free environment to avoid temperature and humidity fluctuations affecting sensor performance. The sample should be evenly dried to avoid clumping, and the weighing should be accurate.
Regular maintenance and validation:
Regularly clean the instruments, especially the mixing chamber and titration system, to prevent residues from affecting accuracy. It is recommended to conduct a comprehensive calibration every 3-6 months or adjust according to the frequency of use. Before each use, a standard sample can be run for validation to ensure that the instrument is in good condition.
Attention:
Environmental control: Ensure a constant temperature and humidity in the testing environment to avoid affecting the results.
Sample processing: Powder samples should be evenly dried to avoid clumping.
Oil selection: Choose the appropriate oil according to the testing standards to ensure its purity and viscosity are consistent.
Instrument maintenance: Regularly clean the instrument, calibrate the sensor, and ensure testing accuracy.