Multispeed Digital Automatic Universal Tester

Multispeed Digital Automatic Universal Tester for Displacement Controlled Tests

ASTM D1883, ASTM D1559, ASTM D5581, AASHTO T245, EN 12697-34,EN 12697-12, EN 12697-23, ASTM D4123, NF P98-251-1/4, BS 598:107, BS 1377:4, NF P94-078, AASHTO T193, EN 13286-47, ASTM D6927, DIN 1996, UNI CNR 10009, CNR 30, CNR 34

Multispeed Digital Automatic Universal Tester is suitable for CBR, Marshall, Indirect Tensile, Unconfined Compression and many other displacement controlled tests. The new MULTISPEED compression tester is the ideal solution for Road testing laboratory. The 50 kN capacity and the fully variable test speed of 0.2 to 51 mm/min make it possible to perform not only the CBR and Marshall tests, but many other applications as for instance Indirect Tensile test,  Quick Triaxial tests,  Unconfined and Uniaxial soil testing and, in general, all test to be performed under  displacement control. The machine can be equipped with analogical or digital load/displacement measurement systems as well as with the specific accessories, to suit either the field or central laboratory requirement.

Main Features

The firmware provide the digital speed control and a number of important test functions as follows:

• Closed loop speed control
• CBR and MARSHALL test speed can be selected by default.
• Other testing speeds (Custom) between 0.2 and 51 mm/min, can be easily set.
• Selection of maximum platen displacement.
• The automatic stop of the machine avoids machine and specimen overloading, thus assuring operator safety.
• Rapid approach function, to reduce the testing time.
• Rapid platen return to speed up the platen base return at the end of the test.
• Speed calibration function by firmware. The test speed is originally factory calibrated using a polynomial interpolation. A test point is provided to verify the speed with a standard tachometer.
• Emergency stop button as required by the CE prescriptions.

Technical Specifications

• Max. Capacity:  50 kN
• Test Speed Range, infinitely variable: 0.2 to 51 mm/min
• Power: DC motor 750 W
• Horizontal Clearance (distance between columns): 270 mm
• Max. Vertical Daylight (without accessories): 730 mm
• Platen Travel: 100 mm
• Overall Dimensions (lxwxh): 392 x 495 x 1213
• Net Weight approx.: 65 kg
• Alphanumeric Display 2x16 characters

Multispeed Automatic Universal Tester with Touch Screen Digital Speed Control and Data Acquisition

ASTM D1883, ASTM D1559, ASTM D5581, AASHTO T245, EN 12697-34, EN 12697-12, EN 12697-23, ASTM D4123, NF P98-251-1/4, BS 598:107, BS 1377:4, NF P94-078, AASHTO T193, EN 13286-47, ASTM D6927, DIN 1996, UNI CNR 10009, CNR 30, CNR 34

The new automatic MULTISPEED Automatic Universal Tester is a versatile stand-alone machine; an ideal solution for road testing laboratories and generally for any test that requires displacement/speed control. The 50kN capacity and fully variable speed of 0.05 to 51 mm/min make it possible to perform not only CBR and Marshall tests, but also many other applications such as indirect tensile, quick undrained triaxial and unconfined/uniaxial soil tests.

The MULTISPEED tester features a rigid two-column structure with an upper crossbeam which can be set at various heights. The load jack, DC motor and controls are housed in an ergonomic cabinet. Automatic control of the test speed/travel is ensured by the microprocessor. Prior to the test, the operator can impose travel limits for automatically ending the test. No external transducer is required for displacement measurement. The firmware allows performance of transducer calibrations and setting of up to 10 test profiles, saving data onboard. A real-time test graph and transducer data are displayed on the touchscreen. The machine has built-in data acquisition with four channels dedicated to two strain gauge load cells and two potentiometric linear transducers; one of each can be used during the test. An important feature is provided by the processing unit that controls the speed in a closed-loop mode, avoiding speed calibrations and tension fluctuation effects. The user-interface is a large touchscreen graphic display supplied with a stylus pen. The front panel is fitted with an emergency button for prompt stopping of the machine.

Test data can be stored on a USB pen drive or downloaded through a LAN communication port in Controls, txt or ASCII format. All the accessories have to be ordered separately.

Main Features

• Stand-alone automatic digital load frame
• Closed-loop speed control
• Four channel on board data acquisition
• CBR and MARSHALL test speed can be selected by default
• Speed calibration function by firmware.
• Integrated transducer calibration facility
• Infinitely variable speed from 0.05 to 51 mm/min can be easily set by keyboard
• Selection of maximum platen displacement with automatic stop
• Rapid approach and return function, to reduce the testing time

Technical Specifications

• Maximum capacity: 50 kN        
• Infinitely variable test speed from 0.05 to 51 mm/min
• Power: DC motor 750 W
• Data download: using LAN port  (ASCII, TXT or Controls format)
• USB port for USB memory stick data storage
• Resolution: 132000 divisions
• Sampling frequency: 50 Hz
• Horizontal clearance (distance between columns): 270 mm
• Maximum vertical clearance (without accessories): 730 mm
• Platen travel: 100mm
• Overall dimensions (l x w x h): 392x495x1213 mm
• Net weight approx.: 65 kg
• Touchscreen graphic display: 240 x 128 pixel
• Large memory data storage in USB pen drive