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Instructions

1. The machine must be kept level

2. Avoid generating air bubbles when the rotor is put into the sample, otherwise the measured viscosity value will decrease. The way to avoid it is to put the rotor into the sample at an angle, and then install the rotor. The rotor cannot touch the wall and 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 residual water after cleaning, it will affect the accuracy of the measurement.

4. The maximum acidity (PH) should not exceed 2. If the acidity is too large, a special rotor should be used. When using ULA, the sample volume should be determined (only 16ml)

5. Select the viscosity standard liquid according to the measured viscosity range, and verify the instrument before each use of the viscometer or rheometer, or check it regularly to ensure the accuracy of the measurement. BROOKFIELD can provide silicone oil or oil standard products with Newtonian fluid properties in various viscosity ranges, with an accuracy of ±1%, and the recommended use period of viscosity standard liquid is one year from opening.

6. When connecting the rotor, use your left hand to gently hold and hold the mandrel (on the main unit), and rotate the rotor with your right hand. This operation is to protect the mandrel and hairspring in the fuselage, which can prolong the service life of the instrument

7. The value should be taken when the value is relatively stable, otherwise there will be a large error in the obtained value

8. When choosing a rotor, it depends on the viscosity of the sample to be measured and the measurement range of the number of rotors that is closest to it, so select the number of numbers.

Installation attention

1. Care should be taken when loading and unloading the rotor. When loading and unloading, the connecting screw should be slightly lifted for operation. Do not use too much force, and do not force the rotor laterally to prevent the rotor from bending.

2. Please do not put the viscometer with the rotor installed on its side or upside down.

3. The connecting end face and thread of the connecting screw and rotor should be kept clean, otherwise the shaking of the rotor will be affected.

4. The viscometer should be supported by hand when it goes up and down to prevent the viscometer from falling due to its own weight.

5. After replacing the rotor, please input the new rotor number in time. After each use, the replaced rotor should be cleaned (wiped clean) in time and put back in the rotor holder. Please do not leave the rotor on the instrument for cleaning.

6. When replacing the liquid to be measured, please clean (wipe clean) the rotor and the rotor protection frame in time to avoid measurement errors caused by the confusion of the liquid to be measured.

7. Instruments and rotors are matched one-to-one, please do not confuse several instruments and rotors.

8. Please do not disassemble and adjust the instrument parts at will.

9. When moving and transporting the instrument, put the yellow cap on the connecting screw, tighten the screw, and put it in the packing box.

10. After installing the rotor, please do not rotate it for a long time without liquid, so as not to damage the shaft tip.

11. Many of suspensions, emulsions, polymers and other high-viscosity liquids are "non-Newtonian liquids", and their viscosity values vary with conditions such as shear speed and time. The inconsistency between the results measured under time and time is a normal situation, not an instrument error. The determination of non-Newtonian liquids should generally specify the rotor, speed and time.

12. Doing the following will help to measure more accurate values:

Precisely control the temperature of the liquid being measured.

Immerse the rotor in the liquid to be tested for a sufficient time so that the temperature of the two is the same.

Maintain fluid uniformity.

When measuring, place the rotor in the center of the container, and be sure to install the rotor protection frame.

Keep the rotor clean and shaken.

When the high speed measurement immediately changes to a low speed, it should be turned off, or the measurement time at low speed should be a little longer to overcome the error caused by the rotational inertia of the liquid.

Use No. 1 rotor when measuring low viscosity, and No. 4 when measuring high viscosity.

When measuring viscosity at low speed, the measuring time is relatively longer.

During the measurement process, due to the need to exchange the rotor, the liquid to be measured, etc., after changing the position of the viscometer by rotating the lifting chuck, the horizontal position of the viscometer should be checked and adjusted in time.