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- To install the rotational viscometer, it is necessary to adjust and keep the horizontal air bubbles on the top of the fuselage in the black circle. We need to ensure the stability and flatness of the operating platform, and then adjust the screw twist at the foot of the instrument;
- Immerse the rotary viscometer rotor into the sample to the groove score on the rotor rod. 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. At present, many rotational viscometers are equipped with leg guards. Be careful not to touch the measuring outer cylinder during installation;
- Check whether the viscometer is in a horizontal state, whether the immersion depth of the rotor is appropriate, whether the uniformity and temperature of the fluid to be tested meet the measurement requirements.
- Select the combination of rotor and speed so that the torque percentage reading is within the range of 10-100%. For more viscous samples, use smaller rotors and lower speeds. For the fluid to be tested with unknown viscosity, extra attention should be paid when selecting the rotor and speed to avoid damage to the instrument due to improper selection of speed and rotor.
- Before reading the viscometer, wait for a period of time (usually after 10 seconds) to allow the reading of the viscometer to stabilize. The length of time depends on different fluid properties;
- Whenever the viscometer changes the rotor or sample, press the “MOTORON/OFF/ESCAPE” key to turn off the motor;
- After the measurement, remove the rotor, clean and dry it, and put it back into the rotor box.