Description
The Liya Test Automatic Ring And Ball Test Set is an innovative microprocessor controlled automatic testing device which is used for determining the softening point of bituminous materials using water or glycerol as bath liquid in a range from 30°C to 150°C.
Two bitumen samples casted in shouldered brass rings while being held in horizontal position, temperature is increased under controlled rate acc. to standards. The softening point is the average temperature value of two samples at the time they collapse 25 mm while each carrying a steel ball.
Assembly includes a ring holder, a bottom plate, 2pcs. brass rings, 2pcs. brass ball centering guides, 2pcs. stainless steel balls, a glass beaker and a magnetic stirrer bar.
Two revolutionary features of the are the immersed heating resistance and the cooling mechanism for the specimen pre-conditioning. Immersed heating resistance provides direct heat transfer to bath liquid without any loss and it is more efficient than the traditional hot plates. Combined with the PID control, temperature gradient is strictly maintained during the test. Cooling unit reduces the temperature of the bath liquid to 5°C automatically. This feature eliminates the dependency to a refrigerator or dealing with ice cubes for test preparation.
Optic sensors instantaneously detect the specimen collapse and the control unit records the softening point temperature value.
Control unit collects data from the temperature probe and governs the cooling and heating systems in PID control loop. Apart from the control, it utilizes user interface functions such as defining test sequences, multiple point & offset calibration of the temperature probe, calibration preparation menu, fine tuning of temperature gradient and visual simulation of the test area.
