The light weight deflectometer is used to determine the soil bearing capacity and compaction or consolidation of soils and non-cohesive sub bases, as well as for soil improvement applications. The test method is suited for coarse-grain and mixed-grain soils having maximum grain size of 63mm.
Testing inbuilt soil layers can be carried out very quickly and without requiring a vehicle, which means it is also suitable for sites that are difficult to access. The machine is used in many areas - in road construction, railway engineering and earthworks, for quality protection in canal construction and utility trenches, and in the examination of roadbeds and foundation fillings.
Consisting of:
- Loading unit with bubble level
- Load plate with acceleration transducer
- Electronic settlement meter with display of date and time in carrying case
- intuitive menu navigation, languages selectable
- graphic display
- displaying and storing of settlement data, settlement speed and curve (relation s/v) and deformation modulus Evd
- storage capability for up to 500 tests
- interface for USB, Bluetooth, thermal printer and PC
- compatible with external GPS-receiver (optional 1.06.02.08)
- very robust and splashproof
- Thermal Printer
- small, quick, with light resistant thermal paper for immediate documentation
- long mobile usability, due to integrated 1,8 AhNiMH power pack
- incl. charger for vehicle (12V/24V),
- connecting cable to the electronic settlement measuring instrument,
- 5 thermal paper rolls
Applications
- Road construction
- Testing of pavement bedding
- Quality assurance in canal and sewer construction
- Compaction tests in ducts and trenches
- Backfill of foundations
- Railway construction
Features
- large graphic display (62 x 35 mm) comfortable menu navigation
- acoustic signal when ready to measure Bluetooth interface
- printer port
- GPS port
- internal memory for 500 tests
- more than 1000 tests with one battery charge
- 2 year warranty
- 10 years of spare parts availability guaranteed
Test Procedure
Set-up
- level the test area
- lay down the full-size load plate
- put loading mechanism onto it
- connect it with measuring instrument
- switch on, confirm mode 'Measuring'
- follow the instructions in the display
- perform successively 3 precompacting impacts & 3 measuring impacts
- displaying the settlement after each impact
- automatic calculation and displaying all measured data and the Evd value
- save the measurement, print and transfer it
- showing the GPS and curve data after completion of the measurement
SL412 Specification
Measuring Instrument |
| Settlement measuring range 0,1 to 2,0 mm ± 0,02 mm |
| Measuring range Evd < 225 MN/m² |
| Temperature range 0 to 40 °C |
Very robust, splash-water proof, connection cable
with high-quality LEMO connectors |
| Graphic display 38 x 68 mm |
| black/white |
| Bluetooth, USB, thermal printer interface |
| Dimensions 211 x 100 x 26 mm |
| Storage capacity, internal - 500 measurement series |
| Power supply - 4 x R6 Batteries |
| Menu navigation (18 languages available) |
Loading Mechanism
|
|
| Total weight 15,0 kg |
| Drop weight 10,0 kg |
| Max. impact force 7,07 kN |
| Duration of impact 17,0 ± 1,5 ms |
| Material: zinc coated/hard-crome plated steel |
| Spring element 17 disk springs |
Load plate |
|
| Diameter 300 mm, Plate thickness 20,0 mm |
| Total weight 15,0 kg, Material: zinc coated steel |
See SL413, SL414 and SL415 for units with printer and software.
Click to view a PDF file of the User Guide
A user guide is available to download from the Impact web site www.impact-test.co.uk
