Automatic Softening Point Tester is an innovative microprocessor controlled automatic testing device which is used to determine the softening point of bituminous materials using water or glycerol as bath liquid in a range from 30°C to 150°C.
Softening point test determines the softening point of two bitumen samples cast in shouldered brass rings while being held in horizontal position and heated at a controlled rate. The softening point is the average temperature value of two samples at the time they collapse 25 mm while each carrying a steel ball.
TB-0240 is equipped with a cooling and heating system, speed controlled magnetic stirrer, motorized beaker lift, optic sensors, temperature probe with its holder, USB port for PC and a touch screen control unit.
Two revolutionary features of the TB-0240 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.
To ensure uniform temperature distribution, bath liquid is stirred by an integrated step motor with adjustable speed and a magnetic stirring bar.
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 utilises 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.
The device can also be connected to a computer via on board USB-Port to record test data for each minute and export the data in an excel sheet.
TB-0241 Assembly with Ring Holder and Bottom Plate for TB-0240 is also includes 2pcs. brass rings, 2pcs. brass ball centering guides and 2pcs. stainless steel balls.
- EN 1427
- ASTM D36
- AASHTO T53