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  DM1000  
 

DM 1000 is designed for accurate PVT measurement for gases. Based on the state of the art Burnett technique, it helps users to obtain PVT data accurately and automatically:

¡ï temperature measurement uncertainty: better than ¡À5mK (DM1020);

¡ï pressure measurement uncertainty: better than ¡À2kPa (DM1020);

¡ï wide temperature range: -30¡æ~120¡æ;

¡ï Wide pressure range: 0~13.8MPa;

¡ï various properties: PVT data, virial coefficients, and virial equation of state (EOS);

¡ï highly automatically: automatic temperature control system, automatic temperature measurement system, automatic pressure measurement system, automatic data acquisition and automatic data analysis.

 
Introduction Features Specifications Components Validation  

The DM1000measurement system of consists of Burnett apparatus, temperature measurement devices, pressure measurement devices, temperature control system, vacuum discharge system and software.

Burnett Apparatus

The Burnett apparatus consists of the Burnett cell system and pressure measuring devices. The cell system consists of two cells (sample cell A and expansion cell B) that are connected with expansion valve (V1). Both cells are thick-walled spherical vessels. No calibration of mass or volume is needed. The pressure control and measurement system is also combined within the apparatus.

      

Temperature Measurement Devices

Accurate temperature measurement is very important to the experimental research of PVT data. For DM1000/ DM1010, the temperature measurement uncertainty of platinum resistance thermometer is better than ¡À0.01K; and for DM1020, a resistance thermometry bridge with a measurement accuracy better than ¡À0.001K was used.

 

      

Temperature Control System

Uniform temperature is very important for the thermophysical property measurement, especially for PVT measurement.

The temperature system in DM 1000 has a temperature stability of £¨¡À 0.01~ 0.02 ¡æ£©in the temperature range of -30 ~ 120 ¡æ. Together with the software PVT Measurement, automatic temperature control can be achieved.

    

       

 

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