Iso #4 viscosity cup

Be aware, avoid rapid evaporation of these solvents as this can cool the surface to such an extent that humid air may be brought below the dew point, causing a film of water to form on the cup. Centistoke viscosity of these oils is traceable to the National Institute of Standards and Technology. Silicone fluids should not be used to calibrate viscosity cups.

These materials change the interface between the cup surface and the test material and therefore change the cup calibration. The following is taken from ASTM D Viscometers used for silicone fluids should be reserved for the exclusive use of such fluids. Solvent washings from these viscometers should not be used for cleaning other viscometers. The information contained herein, or supplied by us or on our behalf in any other manner is based on data obtained by our own research and is considered accurate.

This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose. Normally, cup calibration is at The formula for each cup in the series is shown on the cup graphs on prior pages.

For convenience, the formula for each cup has been solved for each tenth second within the normal cup range. Results are available in table form as shown at the left and are furnished with each cup. They are also available in sets of four for the four cup series. Use the table as follows: Assume an efflux time of Read down the left column to the The value at the intersection is The tables may be read in reverse to find efflux seconds from a known centistoke value.

Note that conversion values are accurate only for those materials that do not deviate greatly from true liquids. The weight of the new cup has been materially reduced adjacent to the orifice for easier temperature control when cup and material are not at the same temperature. The orifices are of the readily replaceable type permitting coverage of the complete viscosity range with one cup and interchangeable orifices. The orifice may be readily replaced, if damaged, rather than requiring replacement of the entire cup.

The design of the lower portion of the cup and the readily replaceable orifice eliminates the horizontal ledge inherent in earlier designs at the top of the orifice. In addition to physical improvements, the cups are furnished with conversion formulas and a copyrighted table which relates the nearest tenth second of total efflux time to viscosity in centistokes. This table is particularly useful in determining efflux time in seconds when viscosity in centistokes is known.

Such equipment not only insures that each cup is correctly produced, but also that all cups are identical. The body of the cup is machined from solid aluminum bar stock and the orifices of stainless steel. The following table provides operating range specifications and the graphs with the included mathematical formulas define the flow characteristics for each numbered cup orifice combination.

The cup has been greatly reduced in weight by removal of excess metal on the lower portion of the cup adjacent to the orifice. This reduces errors due to possible temperature change imposed by the cup. A horizontal ledge existing at the top of the orifice in earlier cups has been eliminated. Exterior cup dimensions are chosen to fit existing support stands for the Gardco Ford Cup series. It is used as one of several criteria used to permit shippers of paint and other viscous materials to transport them as a less hazardous material than that indicated by flash point alone.

Lower the cup into the material so that the top rim is submerged. Place a thermometer into the cup as it is immersed and determine the temperature of the confined sample.

Remove thermometer. Hold cup vertically by inserting index finger into handle ring. In a quick, steady motion, lift the cup out of the sample material, starting the timer when the cup breaks the surface. Stop the timer when the first definite break in the stream at the base of the cup is observed. Promptly clean the cup with close attention to the orifice. Use a length of nylon fishing line to clean the orifice.

Insure that the cup is clean and that there is no residual dried material in or around the orifice. Insure that the test material is at specified measuring temperature. Place the selected cup in a suitable leveled holder and place a receiving container under the cup.

Place a finger against the orifice and fill the cup until the meniscus where the liquid joins the sidewall of the cup disappears. If there are bubbles in the sample, allow time for them to rise to the surface. If overfilled, remove the excess by sliding the cover plate across the top of the cup.

With the plate in this position, the finger may be removed. Remove the finger from the orifice or pull the scraper plate from the top at the cup and simultaneously start a timer.

This test method is useful for the determination of package and application viscosities of a number of paints and other coatings and in the thinning of these materials, but is limited the Newtonian or near- Newtonian liquids. A cup can produce satisfying and reproducible results when used within its defined viscosity range.

Ford Cups is not suitable for measuring high viscosity liquids, pastes, etc. The machine is used for chemical material process, safety and health protective step must be set up in accordance with all local codes and ordinances.

Before using this machine, safety problem associated with chemical material must be established by user, not belonging to explanation of this Instruction Manual. DIN Cup: DIN cup is designed for quick, approximate determination of efflux times for paints, and similar liquids in workshops. T-4 Flow Cup: 1. Volume of cup: ml 2. Correct coefficient: 0. Cup Number. Testing Range of Kinematics Viscosity. Calculation Method. Ford Cups is made of corrosion-and solvent-resistant material, material of Ford Cup Body is aluminium alloy, material of Ford Cup Orifice is brass, which is subject to wear with use and cleaning.

Each single cup is calibrated against standard oil in a factory. If orifice is loosened or taken out from a cup, the cup should be recalibrated. Cup N o. Range in centistokes. Efflux Time seconds. Ford Cup 2. Ford Cup 3. Ford Cup 4. I hope that is not the case! All I am doing is helping those, like me, who want to have some idea of what is going on when the only data available are measurements from these cups.

Here you can choose from one of a few types of cup, specify your time in the s range and get an estimate of the viscosity in cP. If you have ever measured a real viscosity and compared it to a value from one of the "standard conversion tables" you will probably be surprised at the difference. One supplier said words to the effect of "We're not changing our cups to meet ASTM standards because our users would be confused between old and new cups. Those errors seem rather large to me!

I am one of the RheoLogic co-authors of the TopCoat package that accurately models coating , drying and defect analysis, all in an easy-to-use format. Visit my channel for more Practical Science videos.