Light Weight Deflectometer (LWD) PRIMA100


Product code: CRT-PRIMA100

Light Weight Deflectometer (LWD) PRIMA100
The LIGHTER field measuring equipment with state-of-the-art technology based on more than 30 years of experience of development and production of large scale equipment

Unique PRIMA 100 features

Direct measuring of the E-modulus. PRIMA 100 is the only portable falling weight Deflectometer with a separate load cell. This allows measuring on all layers irrespective of strength, as the drop height is adjustable. The PRIMA 100 method is quicker than the isotope measuring method and requires no reference measurements. The equipment has no radioactive sources requiring safety courses and can be operated by one operator, allowing for the analysis of collected data and printing out of data files on site. PRIMA 100 can be supplied with GPS allowing storage of measuring positions and data in GIS databases.

Data collection

Data collection with the new PRIMA 100 is done via cable/portable PC or wireless PDA/blue-tooth. The latter option allows the operator to work freely on a measuring site. The operator controls the measuring work on the instrument itself. After each drop all data is displayed. Data is stored in the computer or PDA. When measuring large amounts of points, it may be an advantage to store data in more files.

Data presentation/documentation

After the measuring campaign or any time during a campaign, data can be seen on the display. Either each individual drop or the entire series of measuring points is displayed. Data can be transferred to Excel or Word. This allows printing of data for further interpretation or direct presentation in a report as documentation for e.g. a client. Extension to three geophones is possible.

The equipment

The equipment is delivered with a 100 mm and 300 mm diameter loading plate, a 10 kg weight, integrated load cell and electronic box and a centre-mounted geophone. Extension with a beam for two extra geophones is possible. A portable PC or a PDA with a data collection program installed is required.
Easy power supply PRIMA 100 is a field instrument and thus the power supply must be handy. Four ordinary AA batteries supply power to electronics and display.

Key Features

  • 100mm loading plate
  • 300mm loading plate.
  • 10kg drop weight (up to 20kg drop weight is possible).
  • 4 rubber buffers.
  • 1 load cell for force measurement.
  • 1 centre deflection sensor (up to 3 deflection sensors are possible).
  • Interface box and communication cable for laptop / PC.
  • Measuring and data collection software (Windows 98/200 /NT/XP).
  • Including Bluetooth Antenna and Trimble PDA.
  • RoSy compaction.
  • E-modulus calculation/design software for up to 4 layer structures.
  • Calibration certificate
  • Manuals in English (1pc)
  • 24 months warranty on LWD parts
  • CE marked
  • ISO 9001/2000
  • ASTM E2583-07 US
  • HA IAN73/06 – UK
  • Pr IV 90 – DK

  • Estimated Weight Weight, standard equipment <20kg
    Weight incl. all weights <30kg Drop weight 10, 15 or 20kg
    Maximum drop height 85cm
    Guide rod: D22mm stainless steel 316
    Load Characteristics Load plate: D100, 200 or 300mm Load range: 1-20kN
    Load pulse duration: 15-30ms
    Load pulse shape: Essentially half-sine
    Load pulse rise time: 8-15ms
    Load Cell Load cell accuracy: 1% +/- 0.1 kN
    Load resolution: 0.1kN (1KPa)
    Frequency range: 0-400Hz
    Deflector sensor Sensor type: Seismic Velocity Transducer
    Number of geophones: 1-3
    Geophone accuracy: Better than +/-2%
    Geophone resolution: 1micron
    Geophone range: 1-2200microns
    Frequency range: 0.2-300Hz
    Calibration & Maintenance

    Calibration, Annual Service and Maintenance Contracts are available for this device. Please enquire for further details. Note: This device should be checked and calibrated annually.

    Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

    Loading plate for Prima100 200mm loading plate
    5kg weight for Prima100 Extra weight detach type 5 kg*
    (one extra weight is possible with 2 tonnes load cell, two extra weights are possible with 5 tonnes load cell)
    geophone for Prima100 Extra geophone with individual housing – mount beam
    (up to two extra geophones are possible)
    T-Beam for prima100 T-Beam
    mounted with two additional geophones
    Photo? N.A Geophone beam for 2 extra geophones
    (enabling measuring with a total of 3 geophones)
    Transport Trolley for Prima100 Transport trolley* (Aluminium)
    Transport box for Prima100 Transport box
    (reinforced box) 765 x 362 x 400 mm
    stacking tower for Prima100 Stacking tower
    for verifying the geophone readings
    Photo? N.A Battery charger
    for 4 x AA batteries
    Photo? N.A Upgrade RoSy Compaction
    E-modulus calculation/design software for 9 layer structures
    Photo? N.A PRIMA Design
    Back calculation software for 3 –geophones

    *The accessories no. 2 and 7 are the most sold as well as most recommended pieces of accessories. Especially if you are doing a lot of field work.

    Please complete the form below to download the datasheet