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4 Experiments and results
The following experiments aimed to verify the theory (section 2) and correct operation of the viscometer, investigate the dependence of viscosity on temperature, and establish some idea of measurement accuracy.
4.1 Basic viscometer operation
4.1.2 Motor Speed during a measurement
4.1.3 Angular displacement and motorspeed.
From the qualitative features of these observations, the viscometer and control system seem to function correctly and as expected. Furthermore the theoretical relations derived in section 2 also appear to be obeyed in this instrument. As expected (see section 3.1) the spiral spring appears to impose some limitations on the measurement accuracy obtainable.
4.2 Dependence of viscosity on temperature
4.3 Accuracy and long term stability
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