Overview
XIONGFA NDJ-8S digital rotational viscometer is a new digitalization instrument developed by monolithic microprocessor technology for measuring the Tack resistance of liquids and the absolute viscosity of liquids. Compared with similar instruments, it has the advantages of high Measurement accuracy, stable viscosity value display, easy reading, simple operation and good anti-interference performance. It is widely used in measuring the viscosity of various fluids such as oils, paints, food, Adhesives and cosmetics. Execute and process according to the general technical conditions of laboratory rotational viscometer issued by the Ministry of Standards JB/T 9357.
Features
1. Measurement accuracy is high, viscosity value shows stable and easy to read.
2. Easy to operate, good anti-interference performance.
3. Equipped with a variety of rotors (No. 1-4, No. 0 optional) and eight speed (0.3, 0.6, 1.5, 3, 6, 12, 30, 60rpm), Measurement range (10~ 2000000mPa · s).
4. With automatic scanning function, it can automatically select the appropriate rotor number and speed.
5. Support Chinese/English operation interface switching.
6. Use the reading stability cursor (vertical bar square cursor), and the reading is basically stable when the grid is full.
7. Measurement accuracy of +/- 2% F. S (Newtonian liquid).
8. Temperature accuracy is 0.1 ℃.
Principle
The programmable motor drives the shaft to stabilize the swirl/spin according to the speed given by the program, and then drives the standard rotor swirl/spin through the button moment Sensor. When the rotor swirl/spin in a certain liquid, due to the viscosity of the liquid, the rotor is subjected to a torque proportional to the viscosity. The viscosity of the liquid can be obtained by the torque Sensor measurement of this torque. In order to expand the Measurement range, it is equipped with a variety of standard rotors and multi-speed speeds. The instrument has a data memory and a microcontroller inside, which can control the motor speed according to the user's choice, and is equipped with an RS232 communication port for two-way data communication with the computer. Measurement with a rotor guard can achieve relatively stable test results.
Applications
Oils, paints, food, Adhesives, cosmetics
Steps
1. Install the brackets and struts, install the Viscometer's lifting device on the struts and adjust the tightness.
2. Remove the yellow protective cap on the lower end of the instrument.
3. Observe the horizontal bubble, adjust the horizontal adjustment screw at the lower part of the bracket to center the bubble and ensure the level of the instrument.
4. Connect the power cord.
5. After turning it on, the instrument displays the last rotor and speed values, which can be viewed and selected through the up and down buttons on the panel.
6. Estimate the approximate viscosity of the measured liquid, select and set the appropriate rotor and speed through the up and down keys and left and right keys.
7. Install the rotor and press the Enter key to start the measurement.
Notice
• This instrument is suitable for use at room temperature, and the temperature of the tested sample should be within +/- 0.1 ° C, otherwise it will seriously affect the measurement Precision.
• The instrument needs to be used within the specified voltage and frequency (AC 220V +/- 10%, 50Hz +/- 10%) and the allowable error range, otherwise it will affect the Measurement accuracy.
• Be careful when loading and unloading the rotor, lift the connecting screw slightly, do not use too much force, and do not force the rotor laterally to avoid bending the rotor.
• Do not place the instrument sideways or upside down after installing the rotor.
The connecting face and thread of connecting screw and rotor should be kept clean, otherwise it will affect the correct connection and rotation Stability of rotor.
• The instrument should be held by hand when lifting to prevent the instrument from falling under its own weight. After each use, the rotor should be cleaned in time (rotor cleaning should not be carried out on the instrument). After cleaning, it should be properly placed in the rotor box.
• Do not "swirl/spin" without liquid after installing the rotor to avoid damaging the shaft tip.
• Do not disassemble or adjust the instrument parts at will, and do not add lubricating oil by yourself.
• When the instrument is moved and transported, a yellow protective cap should be put on, the connecting screw should be lifted, and the screws on the cap should be tightened.
• Remarks: Suspension, emulsion, polymer and Miscellaneous high viscosity liquids are many "non-Newtonian liquids", the apparent viscosity value changes with the change of shear speed and time, so in different rotor, speed and time measurement, the results are inconsistent is normal, not the instrument is not inaccurate (general non-Newtonian liquid measurement should specify the rotor, speed and time).
