Viscosity is a physical characteristic of a fluid substance, which reflects the internal friction between molecules when the fluid is subjected to an external force. The viscosity of a substance is closely related to its chemical composition. In industrial production and scientific research, the composition or quality of substances is often monitored by measuring viscosity.
For example, in the production process of polymer materials, the viscometer can be used to monitor the viscosity of the synthesis reaction product and automatically control the reaction end point. Others such as petroleum cracking, lubricating oil blending, automatic control of the production process of certain foods and drugs, monitoring of crude oil pipeline transportation process, quality inspection of various petroleum products and paints, etc., all need viscosity measurement.
In actual engineering and industrial production, it is often necessary to detect the viscosity of the fluid online to ensure the best process operating environment and product quality, thereby improving production efficiency. Through the online measurement of the liquid viscosity in the process, the data of the rheological behavior of the liquid can be obtained, which has important guiding value for predicting the process control of the product process, the conveyability and the operability of the product during use.
Viscometer measurement method
1. Install the viscometer and adjust the level of air bubbles on the top of the fuselage to be in the black circle;
2. Immerse the viscometer spindle into the sample up to the notch on the spindle stem. If it is a dish-shaped rotor, pay attention to immerse it into the sample at an angle to avoid air bubbles affecting the test results. During this process, lateral impact should be avoided;
3. Check whether the viscometer is in a horizontal state and whether the immersion depth of the rotor is appropriate.
4. Select the rotor and speed combination so that the torque percentage reading is in the range of 10-100%. For samples with high viscosity, use a rotor with a small area and a low speed;
5. Before reading, the viscometer should be stabilized after a period of time, the length of time depends on different fluid properties;
6. Whenever the viscometer changes the rotor or sample, press the "MOTORON/OFF/ESCAPE" key to turn off the motor;
7. After the measurement, remove the rotor, clean it, and put it back into the rotor box.
