Overview
The NIRUN NDJ-5S Digital Viscometer is a microcomputer-controlled High Accuracy viscosity measurement instrument. It uses an LCD liquid crystal display with blue backlight to directly display viscosity, rotational speed, torque percentage and the maximum measurable viscosity value at the current Rotor speed. The measurement accuracy is +/- 1.0% of full scale, and it is suitable for viscosity testing of various fluids.
Features
1. Apply NIRUN patented technology to realize multiple sampling in a single rotation, overcoming the drawback that traditional instruments can only sample once in a rotation.
2. Adopting a high-subdivision drive stepper motor, the speed is accurate and stable, and it is not affected by changes in the AC voltage frequency.
3. With timing function, good conformity data can be obtained for thixotropic non-Newtonian liquids.
4, stepper motor direct drive, no noise, easy to change, speed display clearly, good reliability, no jitter.
5. LCD liquid crystal with blue backlight, comprehensive display information, continuous change of viscosity value, sound and light alarm prompt beyond the measurement range.
6, computer full range linear correction, high measurement accuracy.
7. Switching Power Adapter, wide power input, good anti-interference.
8. Optional RTD temperature Probe to monitor sample temperature in real time.
9. Optional RS232 interface, connect the micro printer to print measurement data in real time.
Principle
The Viscometer is based on the swirl/spin measurement principle. The instrument drives a stepper motor to drive the rotor to a uniform swirl/spin speed in the sample, and the rotor is subject to Tack resistance from the fluid. The instrument measures the torque required to maintain the uniform swirl/spin of the rotor (ie, the resistance moment). This torque is proportional to the viscosity of the fluid, and combined with the geometry and speed of the rotor, the viscosity value of the sample is calculated and directly displayed by the microcomputer control system.
Applications
Inks, Glue, Latex, Adhesive solvent, polymer solution, petroleum, paints, solvents, cosmetics, milk products, fruit juice
Steps
1. Choose the appropriate rotor and speed combination according to the estimated viscosity value.
2. Install the rotor and pour the sample into a container with a capacity of about 400ml.
3. Turn on the instrument power and set the required speed through the control panel.
4. Slowly lift the instrument so that the rotor is immersed in the sample to the specified marking line.
5. Start the measurement, and after the display value is stable, read the viscosity value displayed on the LCD screen.
6. After the measurement is completed, turn off the instrument and clean the rotor.
Notice
• Please ensure that the instrument is placed horizontally before use.
• When selecting the rotor and speed, the torque percentage reading should be between 10% and 90% for the best accuracy.
• The depth of the rotor immersion in the liquid must reach the marking line on the rotor rod.
• The sample temperature should be kept stable during the measurement process, and a special thermostatic sink is recommended.
• When replacing the rotor or cleaning, handle it with care to avoid collisions.
• When the instrument alarm prompts, it indicates that it may exceed the current range and needs to replace the rotor or adjust the speed.
• When not in use for a long time, please remove the rotor and keep it safe.
