T-4 Viscosity cups Instructions for use

Tu 4 Viscosity Cup Instructions for Use

1. Before or after measurement, use gauze dipped in the solution to wipe the coated 4 Viscosity Cup and dry it in the air or blow dry with cold wind. No residual liquid is allowed to adhere to the cup or flow out of the tube hole. The inner wall and outflow hole of the cup should be kept clean, and the original smoothness should be maintained when observing the light.

2. The test should be carried out in a constant temperature room at 25±1°C, and the support platform should be adjusted to maintain a horizontal position.

3. Stir the test solution evenly, filter it through a sieve with no less than 567 holes/cm, and keep it at a temperature of 25±1°C.

4. Inject the test solution into the viscosity agent, block the outflow hole with your fingers (if there is a stopper on the corrosive liquid cup), slowly pour the test solution into the cup until the liquid surface protrudes from the upper edge of the cup, if there is any Bubbles, when the bubbles float to the surface, use a clean flat glass plate to push it along the edge once, and divide it to remove the protruding liquid surface and bubbles, so that the level of the measured liquid and the upper edge of the flow are on the same level.

5. Let go of your finger (or push away the stopper), the test solution will flow out vertically, take it up with the cup, and start the stopwatch at the same time, the test solution will flow out into a line, stop the stopwatch when it is disconnected, and the measured time represents its viscosity. The unit is seconds.

6. For the second parallel test, the error shall not exceed 3% of the average value.

7. Use step 1 to clean after each use.

Tu 4 Viscosity Cup Principle

The viscosity measured by Tu 4 Viscosity Cup is the conditional viscosity, that is, the time for a certain amount of sample to flow out of a hole with a specified aperture at a certain temperature, expressed in seconds. Use the following formula to convert the sample outflow time in seconds (S) into kinematic viscosity (mm2/s).

γ=(t-6.0)/0.223 (30s≤t≤100s) 

Among them, t——outflow time (s), γ——kinematic viscosity (mm2/s)

Tu 4 Viscosity Cup technical characteristics

1. NDJ-5 coated 4-cup viscometer is made of stainless steel, with a capacity of about 100 ml. Its geometric size and inner wall roughness meet the requirements of "GB/T1723 Paint Viscosity Measurement Method", and its bottom is a stainless steel outflow hole.

2. Correction coefficient K: Multiply the viscosity measured by the corrected Tu 4 cup viscometer by the K value, which is the condition measured by the Tu 4 Viscosity Cup. The correction coefficient K should be within the range of 1±0.03, otherwise the Viscosity Cup should be replaced when Tu 4 is used. The Tu 4 cup viscometer should be calibrated regularly according to the frequency of its use.

3. The difference between the measured value of the standard viscosity liquid with known kinematic viscosity and the outflow time of NDJ-5 coated with 4 cups of viscometer and the computer should be within ±3% of the calculated value.