Precautions for operation of rotary viscometer
1. The machine must be kept level
2. When the rotor is placed in the sample, avoid generating bubbles, otherwise the measured viscosity value will decrease. The method to avoid is to put the rotor into the sample at an angle, and then install the rotor, the rotor cannot touch the cup wall and the bottom of the cup. The sample to be measured must not exceed the specified scale.
3. When measuring different samples, the rotor must be kept clean and dry. If the rotor has other samples or water remaining after cleaning, it will affect the accuracy of the measurement
4. The maximum acidity (PH) cannot exceed 2. If the acidity is too high, a special rotor should be selected. When using ULA, the sample size must be determined (only 16ml)
5. When connecting the rotor, use your left hand to gently lift and hold the mandrel (on the main unit), and the right hand to rotate the rotor. This operation is to protect the mandrel and hairspring in the fuselage, which can extend the life of the instrument.
6. When the value is relatively stable, otherwise there will be a large error in the value obtained
7. When selecting the rotor, it depends on the viscosity of the sample to be measured and the measuring range of the number of rotors is closest, so choose the number.
8. Select the viscosity standard liquid according to the measured viscosity range, and verify the instrument before each use of the viscometer, or periodically check to ensure the accuracy of the measurement.
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