HLS400 - Heavy-Duty Load Frame

Universal Test Machine for Uniaxial testing, Unidimensional compression tests, CBR-tests and Marshall-tests (optional: tensile testing)

Standards: DIN EN ISO 17892-5 • DIN EN ISO 17892-7 • DIN EN ISO 17892-8 • DIN EN ISO 17892-9 • EN 13286-47 • TP BF-StB Part B 7.1 • ASTM D 2435 / 4546 • BS 1377

The test machine HLS400 is optimized for speed- and load-controlled tests.  Because of its hydraulic drive, is particularly suitable for the analysis of brittle sample material.

A 400 kN load transducer directly records the load on the specimen. Alternatively, smaller sensors can also be used. With appropriate adapters these sensors can be installed and connected to the controller electronics on the back of the device.

With an external digital dial gauge, the travel distances and deformations are also recorded directly on the test specimen with an accuracy of 1µm and fed to the controller electronics. This compensates for even the smallest device deformation and loads the test specimen with the specified speed rate.

The operation panel with touch-screen and separate function keys with haptics offers a intuitive and easy handling. The panel shows all measured values and gives an overview of the general operating status.

For controlling and data recording, the device is connected via RS232-interface with a standard computer. The Software GeoDESC is managing the data exchange between testing machine and computer. GeoDESC is logging all measured and given values in a database. The software provides an online interface to MS EXCEL® for standardized and customized test procedures. This offers a free testing programming (using MS VBA®) and fully automatic and flexible testing procedures.
Next to the logged data in the GeoDESC-database and the EXCEL test procedures there is an option for online ASCII-export during testing.

By using the latest hydraulic and control technology from our own development, all components could be integrated directly into the device. The HLS400 enables tests procedures up to a maximum load of 400 kN with a small footprint and low power consumption.

Due to the low power consumption, operation on a UPS (uninterruptible power supply) is possible without any problems.


  • precision hydraulic drive for closed-loop load-, displacement- and speed-controlled testing optimized for uniaxial testing acc. DIN 18136, CBR-tests acc. DIN EN 13286-47 and  TP BF-StB Part B 7.1, Unidimensional compression tests acc. DIN 18135 and Triaxial testing acc. DIN 18137-2
    - additional firmware and accessories requiered -
  • high speed multi-core-system with bus coupling and high resolution closed-loop controller with 1 ms sampling time
  • rugged and functional construction with a very stiff 4-pillar load frame
  • precise settlement measurement with digital dial gauge, resolution 10 µm and 1 µm
  • intuitive operation and easy handling with 4,3” touch screen with separate function keys and haptics
  • changeable load sensors with automatic detection of the measurement range to adapt different test parameters
  • manual adjustment of the thrust plate / upper traverse
  • electronic load and stroke limitation to prevent sensor damages
  • measurement of a external analog signal (e.g. pore pressure or temrature sensors)
  • internal temperature measurement and monitoring
  • serial interface for PC-controlled testing with data logging; cyclic measurement data logging, displaying and transfering to Microsoft EXCEL for advanced evaluation purposes
  • ready for 230 Volt connection, no three-phase current required

Options (additional accessories requiered):

  • tension testing
  • direct load measurement with load cell on top of sample
  • automatic sample contact recognition for taring (with digital dial gauge)


  • housing for access and splinter protection
  • several load cells
  • digital dial gauges (DMU)
  • external sensors (e.g. pore pressure or temrature sensors)
  • Accessories for Uniaxial compression testing, CBR-testing, Unidimensional compression testing and Triaxial testing
maximum load: 
400 kN (compression)
drive system: 
maximum traverse distance: 
150 mm
sample compartment: 
350 x 500 mm (W x H)
settlement measurement: 
max. 60 mm, resolution 1 µm (depending on dial gauge)
test speed: 
0,001 .. 10 mm/min
serial, RS232
power supply: 
230 V AC, 50/60 Hz
dimensions (WxDxH): 
550 x 600 x 1800 mm
approx. 380 kg