NDJ type Rotational Viscometer is a widely used viscosity testing instrument, usually used to measure the kinematic viscosity of liquids. The following is a detailed introduction about the selection points and precautions of NDJ viscometer:
select points
Measuring range: When choosing an NDJ viscometer, the instrument model should be selected according to the viscosity range to be measured. Different NDJ models have different measurement ranges, usually 0.12 million mPa s or 0.113 million mPa s. When selecting, you should ensure that the measurement range of the NDJ model covers the actual measurement range.
Accuracy: When selecting an NDJ model, the accuracy of the test should be considered. Generally, a higher viscometer accuracy will provide more accurate results, but it will also be more expensive. Therefore, the NDJ model should be selected according to actual needs to ensure that the experimental requirements are met.
Mode of operation: NDJ models have two modes of operation, manual and digital control. The manual type is more suitable for simple measurement operations, while the digital control type is more suitable for laboratories that require higher precision and automated operations.
Precautions
Calibration: Calibration should be performed before using the NDJ Viscometer for measurement. Calibration can ensure the accuracy and precision of the measurement, and should be operated in accordance with the requirements on the equipment manual.
Cleaning: The NDJ Viscometer is a precision instrument and should be thoroughly cleaned before and after use. Any contamination in the viscometer will affect the measurement results, so cleaning is very important.
Operating Skills: Operating an NDJ viscometer requires skill and experience, especially when measuring highly viscous samples. The measuring head and rotating speed should be selected correctly, and attention should be paid to maintaining a stable ambient temperature and working condition of the viscometer.
Sample preparation: Before performing viscosity measurement, it should be ensured that the sample has been thoroughly mixed without air bubbles and impurities to ensure measurement accuracy.
In short, choosing a suitable NDJ viscometer, paying attention to calibration and cleaning, and mastering correct operating skills and sample preparation methods can ensure the accuracy and reliability of the NDJ viscometer.
