This instrument is based on the standards of the People's Republic of China GB/T 4508-2010《 Method for determining the degree of radiated petroleum asphalt, industry standards of the People's Republic of China JTG E20-2011《 In the test procedures for asphalt and asphalt mixtures for highway engineering T 0605-2011《 Designed as required by the Asphalt Delay Test, it is applicable to GB/T 4508-2010、 or T 0605-2011 The method specified in the standard determines the length of petroleum asphalt stretched to fracture at a certain speed under specified conditions and temperature, so as to cm express.  

1. Main technical characteristics 

1、The operation controller is independently designed with a large screen (800×480lattice )Color touch screen, can be operated with wired and remote control, can also be operated with movable and wireless, which is intuitive and convenient.  

2、The color touch display screen displays in Chinese, a variety of flexible button configurations, and the internal real-time clock and large-capacity memory are provided. Various detection data such as temperature, pulse, and photoelectric input can be displayed and processed by themselves. The parameter settings, operating status and data are displayed in Chinese, which are intuitive and convenient.  

3、Adopt 50 L The split water tank is designed, and the split water tank independently completes the refrigeration, heating and constant temperature control of circulating water.  

4、Using a double-layer sink design to ensure that the temperature is constant in the test time (within 30 minutes) ±0.1℃，During the tensile test, the water surface of the inner tank has no fluctuations and the temperature is constant. After the test is completed, the working system will automatically work again.  

5、Adopt advanced temperature control technology, short cooling time, good temperature control effect, uniform water bath temperature, standard 25 ℃Refrigerate to 5 at room temperature ℃The time is about 1 hour ±10minute. , 

6、The stretching system adopts external screw rod and double-track positioning； The drive motor adopts a frequency converter motor, with a large torque distance, a wide selection range, and stable and reliable operation.  

7、It has two working modes: automatic operation and manual transfer. Users can choose [Automatic operation] or [Manual transfer], making the instrument operation and maintenance very simple and easy to operate.  

2. Main technical indicators and parameters 

1、Water bath setting temperature:     (5/10/15/50)℃ 

2、Water bath temperature control accuracy:     ±0.1℃ 

3、Maximum measurement length:     ≤1500mm 

4、Delay display accuracy: 1 mm 

5、Stretching speed:             ≤250mm/min±2.5mm/min  

6、Tensile motor power: 180 W 

7、Heating power: 2 kW×2 

8、Refrigeration power: 2700 large calories 

9、Working power supply: three-phase 380 V±10%、50HZ 

11、Ambient temperature: -10 ℃～+35℃ 

12、Relative humidity:         ≤85%。 

13、Dimensions: 2320 ㎜×620㎜×1030㎜（long ×Width ×high).  

14、Power consumption of the whole machine: not more than 4200 W。