DT-227Dual speed pavement material strength testerRoad strength testerHardware Function

1．240×128Large screen LCD display, numeric keypad.
2．2The input channel of the time division pressure sensor can be configured with different ranges to complete different functional tests.
3．2The road displacement sensor input can be used separately or simultaneously.
4Motor control output: single-phase output(Swap output)Three phase output is optional, and the motor power supports up to1.5KW.
5Limit input:2road(TTLLevel input)
6Built inRS232CCommunication port, can communicate withPCMachine communication.
7Built inUSBHost interface, capable of connectingUSBInk jet printer.
8Equipped with a parallel micro needle printer interface.
9Built in high reliability ferroelectric memory, capable of storing experimental data including curve data streams10Group test record, unlimited read and write life, power failure100Annual data is not lost.

Road strength tester
The software and hardware functions listed above may not be fully equipped at the factory, and some functional modules may not be installed according to user needs. If you need to know the functions configured when the machine is shipped, please refer to the next page of this manual.
(1)Second pressure sensor
(2)Second displacement sensor
(3)mini printer
(4) RS232Serial communication cable andPCMachine testing software
(5) EPSON ME1+colour inkjet printer

Pavement material strength tester(LC-127D)

1)Power on
2)Place the specimen on the lifting platform of the instrument.
3)Adjust the hand lever according to the experimental specifications,(That is, fast, slow, manual)
4)press“rise”Press the key to start the experimental operation.
5)During the experiment, the deformation of the specimen should be increased at a constant rate and maintained at that rate1mm/min.
6)When the specimen ruptures, promptly record the maximum load at the time of failureP(N).
7)press“drop”Press the key, remove the specimen, and disconnect the power supply.

Road strength testerThe indirect tensile strength of various soil specimens can be determined using attachments(Splitting test)Load bearing ratio test(Including the determination of water immersion expansion)Rebound modulus test(Intensity meter method)Unconfined compressive strength test, Marshall stability test, and asphalt mixture splitting test.
Main technical indicators of pavement material strength tester:
Maximum load:max.100KN
The maximum displacement:max.200mm
Speed:1mm/min，and 50mm/min.(Two speed options)
Measurement accuracy:±1%
Actions: manual and electric
power supply220V±10V 50Hz 1
Power:370W

Road strength testerPrecautions
1.The limit position of the rising screw disc of the pavement material strength tester is the distance between its disc surface and the top surface of the base box300mmThe limit position for the descent of the screw disc is the distance between its disc surface and the top surface of the base box60mmIf the above two limits are exceeded, the pavement material strength tester may be damaged.
2.The tester should be placed in a flat and stable position on the ground, and the tester should have a grounding safety protection device. 3.Attention should be paid to regularly maintaining the pavement material strength tester:
①.The road material strength tester should be kept clean and tidy regularly, and the table and surrounding environment should be cleaned and wiped clean after each use.
②.After wiping the screws, plates, and columns clean, they should be coated with anti rust oil, and an appropriate amount of lubricating oil should be dripped onto the screws before use every day(20Number of engine oils)To ensure the normal lubrication of the screw during operation, reduce wear and prolong its service life.
③.When not in use, the protective cover should be securely fastened.
4.When using the electric operation test of the pavement material strength tester, it is necessary to pull out and remove the handle to avoid injury caused by rotation during transmission.

Road strength testerstructural principle
The pavement material strength tester consists of a base, gearbox, column, crossbeam, and cover. The electric motor and control appliances are placed inside the base, and the gearbox is placed on the base. The crossbeam, gearbox, and base are connected by two columns, and the crossbeam can be adjusted up and down to accommodate samples of different heights. The lower plane of the crossbeam can be connected to a force measuring ring. The base and gearbox are equipped with covers on the outside. There are two forms of loading for the testing instrument, one is electric. The electric motor is transmitted from the synchronous toothed belt to the gearbox, and after being decelerated by the gearbox, the rotational motion is converted into the vertical motion of the screw, thus achieving the function of vertical loading on the sample. Another method is manual, by placing the speed control handle in neutral, you can manually load it by shaking the handle.