I. Summary
　The instrument is designed and made as per the National Standard
of Peoples Republic of China GB/T***7 Test Methods for Softening
Point of Petroleum Asphalt, and T***8 Asphalt Softening Point Test
(Ring and Ball Methods) in the Industry Standard of Peoples
Republic of China JTJ**2 Specification and Test Methods of Bitumen
and Bituminous Mixture for Highway Engineering. It is suitable to
determine softening point of petroleum asphalt, coal pitch, liquid
petroleum asphalt, and various asphalts. It is the best instrument
for asphalt manufacturing companies, highway and bridge
construction companies, relative college and universities, and
scientific research institutes.
　It adopts microcomputer controlling, linear heating and
automatic stirring mode, it can make tests for two samples at the
same time. It can automatically show measurement results after
test. It is convenient, efficient, and reliable. It is the best
instrument used to determine softening point of petroleum asphalt
in the asphalt inspection laboratory.
II. Main technical specifications and parameters
　1. Power supply: AC **0V±*0%, *0 Hz
　2. Environment: The room temperature should be less than *5 ℃
and keep stable without air convection.
　3. Measurement range: *2℃～**0 ℃; ±1.0 ℃
　4. Stirrer: The stirring speed can be continuously
adjusted.
　5. Heating power: **0 W
　6. Heating medium: glycerin
　7. Beaker cubage: ***0 ml
　8. Relative humidity: ≤*5%
9. Total power consumption: ≤ **0 W
