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Summary
  This instrument is designed and made as per national standard GB/T ********0 Standard Test Method for Ductility of Bitumen and T********1 Asphalt Ductility Test in JTG E******1 in the Industrial Standard of Peoples Republic of China,Test Methods of Bitumen and Bituminous Mixture for Highway Engineering and ASTM D**3 Standard Test Method for Ductility of Bituminous Materials. It is suitable to determine the distance to which it will elongate before breaking when two ends of a briquette specimen of the material are pulled apart at a specified speed and at a specified temperature，which is named as the asphalt ductility,and also it can measure the ductility of the coal tar pitch.The maximum measurement distance is less than ***0mm,the Unit:cm,and it could do the tensile test for the two samples.

I.    Main technical characteristics
1.The operating controller with independent structure design,and using the single chip microprocessor as the control core.With the large (**0×**0 dot matrix) color touch screen,two types operation:wire and wireless.
2.With the variable frequency motor to control the tensile speed of the asphalt sample,and the photoelectric pulse to detect the tensile speed,automatically adjusting speed by the frequency motor.The both tension sensors to measure the value of the drawing force independently and display it on the screen.
3.It adopts the split design *0L water tank to independently cool by the water circulation,heat and control the constant temperature with the digital temperature sensor to detect and high accuracy temperature control.
4.It use the double water tanks design to make sure the constant temperature accuracy is at ±0.1℃ during the test time(*0 mins) and there are no fluctuation in the water tank.It has the automatic reset after the test,and the system work again
automatically.
5.The stretch system adopts the external lead screw and double track location.The drive motor adopts the variable frequency motor,big torque,wide selection range,reliable and stable work.
6.With two work modes:automatic operation and manual,it makes the instrument operation and daily mantainance much convenient and easy.
7.The instrument has 2 roads force measurement,It can detect 3 samples at a time and measure the tension of 2 samples of them.

II.    Main technical specifications
1.    Water bath temperature setting: control range (**0～*0)℃；accuracy ±0.1℃
2.    Ductility measurement:range ***0mm(±*0mm),accuracy 1mm
3.    Tensile speed: 5cm/min±0.*5cm/minï¼›1cm/min±0.*5cm/min
4.    Tension measurement:range (0～***0)Nï¼› accuracy ±0.1N
5.    Tensile motor power: **0W
6.    Heating power: 2×2kW
7.    Refrigeration power: ***0 kilocalorie
8.    Power supply: Three phase **0V±*0%、*0HZ
9.    Environment temperature: **0℃～**5℃
*0.    Relative humidity: ≤*5%
*1.    Boundary dimension: ***0mm×**0mm×***0mm(L*W*H)
*2.    Overall power consumption:less ***0W