Ubbelohde counter current viscometer

SL-SF01CUbbelohde counter current viscometerIt is an automated instrument for rapidly determining the kinematic viscosity of heavy oil residue, based on ASTM D7279, D445, D446NB/SH/T0956-2017、T/CEC127-2016Standard research and development; As a domestic * product, this instrument is equipped with efficient detergents, which can effectively solve the problems of viscosity measurement and cleaning of heavy oil residue. The functionality of this instrument has comprehensively surpassed that of similar imported products.

SL-SF01CUbbelohde counter current viscometerFeatures:

1. Fast measurement speed. The results are usually obtained within 5 to 8 minutes, and the entire process usually takes no more than 15 minutes.

2. High degree of automation. Measurement, cleaning, drying, result calculation, and repeatability calculation are all automatically completed.

3. There are many types of samples for measurement. It can measure both transparent and opaque samples, including Newtonian liquids such as heavy oil, residual oil, crude oil, gasoline, diesel, kerosene, cutting fluid, lubricating oil, and in use oil.

4. Accurate measurement data. The instrument has a secondary precise quantification function, which can automatically and accurately control the sample measurement conditions to ensure accurate data.

5. Clean quickly and efficiently, with low cleaning costs. A cleaning process generally consumes no more than 20 milliliters of cleaning solution.

6. Multiple auxiliary functions. Includes: constant calibration, temperature calibration, internal clock timing verification, automatic calculation of viscosity index, and automatic conversion of kinematic viscosity to Engler viscosity.

7. Dual over temperature protection for software and hardware, over temperature alarm, and anti dry burn protection function.

8. The temperature rise and fall speed is fast. The maximum heating and cooling rate is 5 ℃/minute.

9. Using double-layer glass cylinders for more uniform temperature.

10. Using PT500 high-precision temperature sensor, the temperature of the constant temperature bath is stable and accurate, with a temperature control accuracy of 0.01 ℃.

SL-SF01CParameter specifications:

Measurement range: 0.3-6000mm²/s， Two viscosity tubes measure a span of 100 times

Sample dosage: 0.3-2 mL

Bath capacity: 5.5 L

Temperature control range: 20-100 ℃ (if the target temperature is below 40 ℃, an additional cooler needs to be prepared)

Temperature control accuracy: 0.01 ℃

Timing accuracy: 0.01 seconds

Repeatability: ≤ 0.68%

Whole machine power: ≤ 1200W

Host size: 450x500x580 (mm)

Working power supply: AC220V ± 10% 50Hz ± 10%

Environmental temperature: 10-28 ℃

Relative humidity:<80% RH

Other: There is no strong vibration, airflow, strong electromagnetic interference, or corrosive gas around the laboratory.

Ubbelohde viscometerIt is a commonly used detection instrument, widely used in multiple industries, and its usage steps are as follows:

1) Adjust the temperature of the constant temperature bath to 25 ± 0.05 ℃ or 30 ± 0.05 ℃ according to the experimental requirements.
2) Prepare polymer solution
When measuring the molecular weight of polymers using viscosity method and selecting a polymer solvent system, the constant K and alpha values must be known, and the solvent used should have the characteristics of stability, easy availability, easy purification, low volatility, and low toxicity. To control the HR between 1.2 and 2.0 during the measurement process, the concentration is generally between 0.001g/ml and 0.01g/ml. A few days before the measurement, dissolve the polymer sample to be tested in a solvent using a 100 ml volumetric flask to prepare a solution of known concentration. Accurately weigh 100-500mg of the polymer to be tested and place it in a 100ml clean and dry volumetric flask. Pour in about 80ml of toluene (in this case, toluene is used as the solvent) to dissolve it. After the polymer * dissolves, place it in a pre adjusted constant temperature bath, and also place the volumetric flask in the constant temperature bath. Add solvent to the mark, take out and shake well, filter into another 100ml volumetric flask using a No. 3 glass sand core funnel, and place in a constant temperature bath for later use. Wash the volumetric flask and glass sand core funnel immediately after use. The glass sand core funnel should be washed with a sulfuric acid solution containing 30% sodium nitrate, filtered with distilled water, and dried for later use.
3) Washing viscosity meter
The cleanliness of the viscometer and the liquid being tested is one of the key factors determining the success of the experiment. Due to the small inner diameter of the capillary in a capillary viscometer, it is easily blocked by dust and impurities in the solution. Once the capillary is blocked, the time required for the solution to flow through the grooves a and b cannot be repeated and accurately measured, resulting in experimental failure. If it is a new viscometer, soak it in detergent first, then wash it three times with tap water, three times with distilled water, and dry it for later use. For a used viscometer, first pour toluene into the viscometer and wash it to remove the polymer remaining in the viscometer, especially the capillary part, which needs to be repeatedly cleaned with solvent. After washing, pour the toluene solution into a recovery bottle, wash the viscometer with washing solution, tap water, and distilled water, and then dry it.
4) Measure the outflow time of the solvent
(a) After measuring t0, pour the toluene in the viscometer into a recovery bottle and dry the viscometer. Use a clean pipette to take 8ml of the tested solution that has been temperature controlled and transfer it into the viscometer (be careful not to stick the solution to the tube wall). Maintain the temperature for 3 minutes and follow the previous steps to measure the outflow time t1 of the solution (concentration c1).
(b) Add 4ml of preheated toluene into a pipette and dilute the above solution. The concentration of the diluted solution (c2) is 2/3 of the initial concentration c1. Then use the same method to measure the outflow time t2 of the solution with a concentration of c2. Similarly, add 4ml, 4ml, and 4ml of toluene in sequence to make the solution concentration 1/2, 2/5, and 1/3 of the initial concentration. Measure the outflow time and record it separately. Note that after each addition of pure reagents, they must be mixed evenly. After each dilution, the E ball, capillary tube, M2 ball, and M1 ball of the viscometer should be washed with the diluent to ensure that the concentration of the solution in each part of the viscometer is equal, and the measurement should be carried out after constant temperature.