ZFG 3000 | ZORN Light Weight Deflectometer (LWD)

Determining Evd values : Checking the compaction quality of soils


With the ZFG 3000, we offer you compact measuring electronics in a robust case with internal data storage for more than 10,000 measurements, an SD card drive and a mega-powerful battery for long runtimes. A thermal printer, an integrated GPS receiver and an integrated WLAN module (for wireless, fast and secure transfer of measurement data to a smartphone, tablet or PC) are also included.

An acoustic signal indicates when the test impact can be dropped and when the test is complete. And if things get dusty, simply close the case lid and operate the device conveniently from the outside.

You will find all the important details in the technical data sheet.

The mechanical components of the ZFG 3000 Light Weight Deflectometers are surface-treated and withstand even rough construction site conditions. The measuring range (Evd) with the 10 kg load device covers 15-70 MN/m². You can optionally purchase a 15 kg load device and use the extension to determine an Evd value in the range of 70-105 MN/m².

The Light Weight Deflectometer is used to determine the dynamic deformation modulus Evd [MN/m²] by means of the dynamic plate load test. This provides conclusions on the bearing capacity and compaction quality of soils.

The main field of application for Light Weight Deflectometers is earthworks and traffic route construction. Other areas of application include gardening and landscaping and soil exploration.

The result in just two minutes

Easy handling

The operation of the LWD Light Weight Deflectometer is convenient and simple, as already during the design and development phase great care was taken to automatically exclude incorrect measurements by means of an internal plausibility check. This ensures that even a non-expert can operate the Light Weight Deflectometer properly after a short instruction and perform precise measurements for soil compaction. However, if you have any questions, please feel free to consult the FAQs to find out what the error could be...or give us a call.

The result of a measuring process including settlement curves can be printed out already on site with the integrated mini printer. All results can also be viewed, processed and printed out later via the SD card. With our ZORN FG Software you can  view, compare and complete the measurement data and mail it as a finished test report to the office or to the client.

With our ZORN FG WebApp, you can go one step further using your smartphone or tablet to view, compare and complete the measurement data and email it to the office or client as a finished test report. To do this, you simply need to transfer the measurement data via WiFi or from the SD card to the relevant device beforehand.

You can find all the advantages of the Light Weight Deflectometer here. 

Evaluation in detail

The evaluation of the measurement results of your LWD 3000 can be carried out directly on the construction site or on the PC in your office.

After completion of each measurement, the result including all measurement curves can be read on the large, backlit display. The data is automatically stored in the internal memory and (!) on the inserted SD card.

With the integrated thermal printer, you can create printouts on site. The printouts show the dynamic deformation module Evd, the measured individual settlements and mean values, the ratio of settlement to settlement velocity (s/v), as well as GPS position (GPS module optional with purchase) and the text entry of the measurement location.

Using the SD card, up to 10,000 measurements can be safely stored. The ZORN FG Software enables the individual display of the measurement logs with all detailed information, summary logs and evaluation in a statistical display. Interfaces to various map providers such as Google Maps enable the display of the respective measuring point on a map or in a satellite image.

A documentation of your test is thus safe and at the same time conceivably simple.

This details are displayed:

  • Three settlements of the bearing plate with settlement curves and the mean value
  • Three settlement velocities with mean value
  • The s/v value as an indicator of the compactability of the tested soil
  • The deformation modulus Evd as a measure of the compaction quality and for the assessment of the bearing capacity
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