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Due to its excellent advantages, the viscometer has become a commonly used analytical instrument in recent years. When using this instrument, it is necessary to follow the relevant standard procedures in order to maximize its performance. So, what issues should we be aware of when using this instrument? The technicians from Delit have provided the following introduction; let’s take a look together! What are the advantages of the GB/T265-88 viscometer? 1. The freezing point tube used in the viscosity meter’s freezing point experiment must be clean and dry. 2. Adequate stirring is required during the cooling process, but the stirrer blade must not go above the liquid surface to prevent the sample from splashing onto the vessel walls. 3. The crystal must be completely melted before the next measurement can be taken. 4. Solid solvents are generally only applicable to dilute solutions of strong electrolytes. Secondly, the freezing point should not be too high or too low, and it should be easy to reach at room temperature. 5. Select a set of appropriate data, plot the cooling curves of the pure solvent and the solution on graph paper, determine the freezing points of both the pure solvent and the solution, calculate the molar mass of urea using relevant formulas, and compare it with the theoretical value. 6. According to the colligative properties of dilute solutions, the amount of solute added should be small ； Too much does not conform to dilute solutions, and too little shows no significant effect at the freezing point. 7. After the viscometer has been “zeroed” and “locked”, its power supply cannot be turned off. The above are the precautions for using a viscosity meter. It is important to follow the proper procedures when using it; one should not use it carelessly, as this could cause damage to the machine and affect its subsequent use. It is also important to pay close attention to maintaining the machine on a regular basis, so that it can function better for us.