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STM-8 Digital Marshall Stability Tester

STM-8 Digital Marshall Stability Tester

This machine is complete with kinds of loading equipments and accessories. It is special for Marshall test.

It can also meet the requirements for the compression strength test and the modulus and splitting strength test of the pavement materials (bitumen mixture, cement lime and so on).

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描述

Application

This machine has the functions such as digital display test result, automatic caculation, data display, to print the test results and the drawing, automatic locking the loading peak value and so on. It has the features such as reliable data, swift and convenient.

Main Performance Index and Technical Specifications:

  1. P1=20.00KN, P2=100.00KN (P as per pressure sensor)
  2. Y=(Y1+Y2)/2=10.00mm (Y as per electric displacement meter)
  3. Working Voltage: AC220V±5%, 50Hz
  4. Working environment: Temperature: 0-40℃,Humidity:＜85%, Air pressure: 86-106Kpa
  5. Stability: ±0.5%
  6. Precision: ±1%
  7. Overloading range: ＋30% (digital), long-term overload is not allowed.
  8. Speed indication: 20 times/second, scanning speed: 100 times/second.
  9. Lift speed: 50mm±5mm
  10. It has function as per both electric motorized load and manual load.
  11. Measuring range: 0-50Kn, precision: 1%
  12. Measuring resolution: 0.1KN, 0.01KN

Main principle and functions:

  1. Loading equipments include the motor, the transmission, the loading system, the special break head for Marshall test, control circult and so on. They have the features as per stable loading lift speed and so on.
  2. This machine includes the force sensor, the electric displacement meter, the stagger amplifier, the single-chip, the control system of the printer and so on. It can quickly collect the datas of “P”, “Y” and enlarge the sihnals through the stagger amplifier. The special software carries on the processing and caculation of the datas. The digital indicator displays the last result after caculation. It can also print the result and drawing at the same time, so the test result is direct to see.

You can select the sampling paces on the faceplate to meet the sampling speeds for different materials. It also has the peak value maintenance function. It can automatically lock the peak value when the specimen in the larggest broken value and print the data. The machine has the function to delete the initial pressure value (P) and displacement value (Y). It means that the displacement variables enter into the data collection system only under the condition of with pressure. The machine has memory function for set. For example, if you set the pace as per 1.00KN when the automatic peak value AAAA (P1=20.00KN), restart the machine after close it, the machine can work according to the settlement as last time.

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