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See how simple it is to take measurements with the HMP LFG4

Put the loading mechanism in place. The additional base plate prevents the device from falling over and getting dirty. It’s held magnetically.

Lay down the full-size load plate.
Put the loading mechanism onto the load plate and release the transportation lock. Now connect the measuring instrument with the load plate, and, switch on the device.

The menu navigation of the HMP LFG4 will guide you reliably through the measuring process.

HMP LFG4 - Start Display - Start measuring

With the arrow keys, please select the corresponding function and confirm it by pressing the [Enter] key.

HMP LFG VideoHave a look at the video.

HMP LFG4 - Display precompaction

Before starting the measurement, the soil has to be pre-compacted by 3 impacts. Therefore connect the falling weight to the release mechanism at the top, and align the guide tube vertically by means of the spirit level.
Now release the lever. Catch the returning weight by hand and connect it again. Repeat this procedure twice.

Start measurement by pressing the [Enter] key.

HMP LFG4 - Display initiate measuring

HMP LFG4 - display measuring, first settlement s1

Now carry out 3 impacts consecutively. The device is ready to measure as soon as you have heard the signal tone.

Therefore connect the falling weight to the release mechanism at the top, and align the guide tube vertically by means of the spirit level. Now release the lever. Catch the returning weight by hand and connect it again. Repeat this procedure twice.

HMP LFG4 - displays measuring process dynamic plate load test

measurement result

HMP LFG4 - display save measuring result, Evd-value, individual settlement amplitudes, average settlement Sm, path/speed ratio s/v

After the third impact, the individual settlement amplitudes, the average settlement Sm, the path-to-speed ratio and the calculated Evd-value will all be displayed.

You are able to save, reject or print out the test series directly. Therefore please choose the corresponding option by means of the arrow keys, and then confirm it by pressing the [Enter] key.

The printout includes the following data:

The current date, the time, the settlements, settlement rates, its average value, the dynamic deformation modulus Evd, the path-to-speed ratio and the settlement curves.

Optionally, the GPS coordinates of the point for measuring can be recorded.


Based on these measured values, you can immediately decide on quality and continuation of the construction project – non-destructive and with no required waiting for time-consuming laboratory results.

You would like to create professional test protocols additionally? No problem!

Transfer the measured values directly via Bluetooth to your smart phone and from there using the HMPtransfer App into the cloud to be processed then by the web-based software HMPreport.

While you are still at the construction site, the data can already be analyzed and further processed at the office. Or, by using your smart phone on site, you simply add missing information to the protocol and send it to whom you want as PDF.


Needless to say, the data can also be transferred conveniently for further processing and archiving using a USB stick or cable to your PC. The software, especially developed by HMP, allows you to store the data in a database with convenient search- and editing features.

HMP LFG4 - display print out the measuring result, Evd-value, individual settlement amplitudes, average settlement Sm, path/speed ratio s/v

HMP LFG4 - Print out - immediately decide on quality and continuation of the construction project – non-destructive and with no required waiting for time-consuming laboratory results!

HMP LFG4 - Display export measuring result into HMPtransfer App, LWD

HMP LFG4 - Transfer/export the measured values directly via Bluetooth to your smart phone using the HMPtransfer App, evaluation of the Dynamic Plate Load Test using the Light Weight Defelctometer

Measured data

HMP LFG4 - display measured data, memory

Here you can find all stored measurements clearly arranged for further processing and documentation.

HMP LFG4 - display measured data, memory

Individual adjustments

HMP LFG4 - individual settings - drop weight

Adjust the display and device configurations to your requirements. Regarding menu navigation just choose one of the various languages and use nationally usual measuring units.

HMP LFG4 - display settings, for example display and device, drop weight, device Light Weight Deflectometer

Note

The procedure of the dynamic plate load test is described in "Engineering Code for Soil and Rock in Road Construction" and in ASTM Code E2835. In addition, other related international standards and comprehensive correlations for other test methods exist.

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