I can see viscosity, torque, and speed values on the display but shear rate and stress are displayed as 0.00. can anyone help me to understand why this is happening?
I will suggest you calibrate the viscometer and redo your experiment or you make use of rheometer machine to conduct your test.
Dear all, which type of viscomiter you use ? I think the is not soluble and it is just spinning in the medium. My Regards
I am using Brookfield pro2 viscometer. The spindle is dipped up to the mark in the beaker.
I was guessing that, again I think the problem is related to solubility. It is chemically or physically crosslinked gel. My Regards
Hi;
To measure the viscosity of a given gel, it is necessary to first calibrate the rheometer with a known substance (think carefully about the conditions under which the calibration is valid!). If not, it is easier to use the gel itself as a calibration medium. By performing the tests simultaneously with two rheometers, one giving a result in fundamental units and the other not, a relationship between the results from the two rheometers will serve as a calibration curve.
My regards
Chemically crosslinked gels do not dissolve, bu they can only swell. So, as I said in my first contribution, they are just spinning arround the spindle. May be cone-and-plate will be better in giving how resistant to flow is the gel. My Regards
Hi. You should use the propet spindle. There are certain spindles for low viscosity, certain spindles for medium viscosoty and certsin spindels for high viscosity. Best wihes.
A viscometer is not a rheometer: if you need a more accurate study of the rheologic properties of the sample, you need a rheometer. If you want to know the viscosity of a sample at a specific temperature, spindle and speed, then you can use the viscometer
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