This instrument is in accordance with the industry standards of the People's Republic of China JTG E20-2011《 Test Regulations for Asphalt and Asphalt Mixture in Highway Engineering T0621-1993《 Designed and manufactured asphalt standard viscosity test (Road Asphalt Standard Viscometer Method)" shall be applicable to T0621-1993 The methods specified in the standard determine the viscosity in the flow states such as liquid petroleum asphalt, coal asphalt, emulsified asphalt, etc.

1. Main technical characteristics
1、This instrument uses a high-precision temperature control device, and the temperature control accuracy can reach 0.1 ℃。
2、This instrument has a compact structure and beautiful shape. It uses dual microcomputer control, which is easy to operate and has high measurement accuracy.

2. Main technical parameters and indicators
1、Working power supply:   AC（220±10%）V ；50Hz。
2、Annular sink: Inner diameter 160 mm， Deep 116 mm。

3、Sample tube: a set of 4, the sizes of the flow holes are φ10mm±0.025mm；φ5mm±0.025mm；

                           φ4mm±0.025mm；φ3mm±0.025mm。

4、Ball plug specifications:     A： Ball diameter 12.7 mm±0.05mm； Marking height 92 mm±0.25mm；
                            B： Ball diameter 6.35 mm±0.05mm； Marking height 90.3 mm±0.25mm。
5、Temperature control range: Room temperature ~90℃。
6、Temperature control accuracy:   ±0.1℃。
7、Timer resolution value: 0.1 s ， Maximum timing value 999.9 s。
8、Heating form:     PTC Tube-shaped electric heating pipe heating, circulation pump and circulation bath, liquid control sink temperature, heating power 750 W。
9、Ambient temperature:     (-10~35)℃。
10、Relative humidity:   ≤85%。
11、Dimensions: 420 mm×340mm×570mm（ long ×Width ×high).
12、Power consumption of the whole machine: not more than 800 W。