How do you compare “MV” OSCILLATING DISC RHEOMETER with brand Rheometer?
Ans3 TO ANSWER THIS QUESTION IT WILL BE BETTER IF WE LOOK AT THE HISTORY OF IMPROVEMENT IN THE ORIGINAL RHEOMETER WITH RESPECT TO CERTAIN SPECIAL FEATURES : A. MECHANICAL : 1. Structural: In older models, the dies are open to the ambient atmosphere resulting in poor temperature control and poor recovery of temperature. For this the dies in later design is housed in a Cabinet with shield controlling the access to the dies. This resulted in better temperature control and recovery during the test. 2. Main Bearing: In older models the bearing on which rotor oscillates is near to the heated region of the sample and also within the measuring system. In later models the bearing is located away from the heated region and is out of the measuring system. This resulted in less repair and maintenance required due to wearing of the bearing. It also resulted in decrease in frictional torque during testing. 3. Clamping of Rotor: In older models the Rotor is clamped mechanically by means of a draw bar
