PRIMA100 light Weight Deflectometer (LWD) is 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.
This portable and practical equipment is the answer to on-site measurement of bearing capacity for on-site measurement of bearing capacity, thus minimizing risk and optimizing quality.
Using the portable falling weight deflectometer, PRIMA 100, is the quickest, easiest and most safe way to determine bearing capacity and assure unbound layer quality. PRIMA 100 measures the surface modulus and presents the results immediately allowing decisions to be made on site.
Direct mesuring 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 strenght, 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, who will have the possibility of analysing collected data and printing out data files on site. PRIMA 100 can be supplied with GPS allowing storage of measuring positions and data in GIS databases.
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.
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 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.
PRIMA 100 is a field instrument and thus the power supply must be handy. Four ordinary AA batteries supply power to electronics and display.