Your company's QC department should be able to help you with ASTM documentation for dip-cup technique with practice, you will be repeatable and reproducible (on a low-vis material that is not too thixotropic) to 0.1 second per "pull." Note, too, that you're dealing with a Newtonian fluid with oil, that is, one that is relatively unaffected by shear. Note that the cal oil will have an expiration date on it, and instructions for storage. The math is basically the same for any efflux cup (Ford, Fisher, Zahn, Sears, etc.) Additionally, there should be instructions with the calibration oil (you DID get some calibration oil, didn't you?) that will help. can help you with that, just give them a call and tell them you need the documentation for a #2 Zahn E-Z, or whatever cup it is you've purchased. You should have received a sheet with the vis cup. It is probably possible to convert between the two, but it would be specific to your type of meter. Perhaps you should try contacting the manufacture of the viscosimeter, as they may have forgotten to include the conversion chart with your meter. Record the time in seconds.Ĭonvert the time (in seconds) into centipoiseĬonvert centipoise value to centistoke value using the following equation:Ĭentipoise value divided by specific gravity of oil = centistroke value centipoise cP, gram/ (centimetre second) g/ (cm s) poise P, kilogram/metre second kg/m snewton second/square metre N s/m 2 pascal second Pa s, pound/ (foot hour) lb/ (ft h), pound/ (foot second) lb/ (ft s), reyn reyn 1 cP 0.001 Pa s 0.01 P 0.01 g/ (cm sec) 6.72197x10 -4 lb/ (ft s) 2. Stop the timer when the steady oil flow from the cup stops. Using the ring attached to the top portion of the viscosimeter, lift the viscosimeter completely out of the oil while starting the timer when the top edge of the cup breaks the surface of the oil. The directions I have are:įully submerge the cup portion of the viscosimeter in the oil. I'm trying to check the viscosity for an oil temperature bath. So, to convert centipoise to centistokes, you simply divide the value in centipoise by the density (in g/cm3, to make conversions less messy). How to Use the Unit Calculator: Please select the 'units in' and 'quantity in ', then select the 'units out' and click on 'calculate' for the result. It does not take time into account.Īre you trying to convert from some sort of flow meter? If you can provide more information as to exactly what you are trying to do, I may be of more help. How do you convert time in seconds into centipoise?Ĭentipoise is a unit of dynamic viscosity, which is the force required to move a layer of liquid with respect to another layer.
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