The rheometer is a direct indicating, manually operated rotational viscometer.
The instrument is powered by a hand crank that drives the main shaft through a precision gear train.
The shift cam selects between fixed speeds of 300 and 600 RPM.
A knob on the shift cam hub determines the gel strength.
During operation, the fluid is contained in the annular space between the two concentric cylinders.
The outer cylinder or rotor sleeve is driven by a hand crank.
The inner barrel or bob is restrained by a torsion spring.
A dial attached to the torsion spring indicates the pendulum displacement due to friction.
Instrument constants have been adjusted so that 300 and 600 RPM readings can be used to calculate plastic viscosity and yield point.
Plastic Viscosity (cP) = 600 RPM reading – 300 RPM reading
Yield Point (lb/100 ft2) = 300 RPM reading
Plastic Viscosity Apparent Viscosity, cP = 600 RPM reading / 2
Dimensions: 240x140x400 mm
Weight : 11 kg
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