ZORN INSTRUMENTS ZFG 3.0 User Manual
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ZORN INSTRUMENTS ZFG 3.0 User Manual

Light weight deflectometer (lwd)
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User Manual
for the
Light Weight Deflectometer (LWD)
ZFG 3.0
according to German standards
Technical Test Code for Soils and Rock Mechanics in
Road Construction
(Technischer Prüfvorschrift
für Boden und Fels im Straßenbau)
TP BF – StB Teil B 8.3
Benzstraße 1, 39576 Stendal (Germany)
Tel: +49 3931 25273-0
Fax: +49 3931 25273-10
www.zorn-instruments.com
info@zorn-instruments.com
Technical changes reserved
Effective: 21.03.2013

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Summary of Contents for ZORN INSTRUMENTS ZFG 3.0

  • Page 1 User Manual for the Light Weight Deflectometer (LWD) ZFG 3.0 according to German standards Technical Test Code for Soils and Rock Mechanics in Road Construction (Technischer Prüfvorschrift für Boden und Fels im Straßenbau) TP BF – StB Teil B 8.3 Benzstraße 1, 39576 Stendal (Germany)
  • Page 2 ZFG 3.0 with printer ZFG 3.0 with carrier bag...

  • Page 3: Table Of Contents

    Purpose ............................4 Concept of saving ........................5 Measuring without SD-card ................... 5 Plug in/ remove SD-card ....................6 Measuring with the ZFG 3.0 ....................7 User advice for engaging drop weight ............... 7 Preparation ......................... 7 Performing a measurement ................... 8 3.3.1...
  • Page 4 7.1.3.4 Problems using the printer ......................18 7.1.3.5 Change paper ..........................18 7.1.3.6 Technical data ..........................19 7.1.4 Transport box ............................19 7.1.5 Transport trolley ............................19 7.1.6 Software ..............................20 7.1.6.1 Short manual ............................ 20 Calibration ..........................21 Correlations ..........................22 Warranty ..........................
  • Page 5 This user manual refers to the default settings of the measurement device. When changes on the settings have been made, the described characteristics can differ. In regarding chapters are links which leads to additional information. For ZFG 3.0 different configurations are available. This manual mainly refers to the 10 and 15 kg configuration.

  • Page 6: Purpose

    User Manual ZFG 3.0 Purpose The dynamic plate load test with the help of the ZFG 3.0 light weight deflectometer (LWD) is a rapid method of determining the dynamic deflection modulus Evd [MN/m²]. This allows conclusions to be made about the load-bearing capacity and compaction of soils.

  • Page 7: Concept Of Saving

    User Manual ZFG 3.0 Concept of saving The measurements are saved on the SD-card, which is plugged into the SD-slot of the measurement device. The measurement device uses the sub directory „ZFG“ of the SD-card. There are three different file types in it: .ZXZ-files, .NRZ-files and .ZXC-files.

  • Page 8: Plug In/ Remove Sd-Card

    Plug in/ remove SD-card To plug the SD-card into the ZFG 3.0 hold the card as shown on Picture 1. Push the card in as far as possible until a click sounds. When the card is plugged in correctly, it sticks 3 mm out of the top.

  • Page 9: Measuring With The Zfg 3.0

    Ensure that there are no hollows underneath the load plate. In this case, fill the hollows with dry medium sand. Then, put the load device on the load plate. Connect the load plate to the ZFG 3.0 with the electronic lead. Pull the transport lock.

  • Page 10: Performing A Measurement

    User Manual ZFG 3.0 Performing a measurement 3.3.1 Switch on device After preparation of measurement (chapter 3.2 - Preparation) switch on the device by pressing the <On/Off> Button. The following start screen appears: ZFG 3.0 Mi 12.01.11 11:58:37 Battery: 5,4V Zorn Instruments The current date/time and battery voltage with load capacity are shown.

  • Page 11: Evaluation And Printing The Results

    User Manual ZFG 3.0 Evaluation and Printing the results Following results are shown: Result TEXT Nr:33 11.03.09 13:22 : 0.266 mm s/v: 2.414 : 84.59 MN/m Meaning of the lines: Screen mode and possibly text input. Test number (only with plugged in SD-card), date and time.

  • Page 12: Menu

    User Manual ZFG 3.0 Menu In the menu, further functions are available. Enter the Menu from the start screen by pressing the <Mode> button. Scroll through the menu by pressing the <Mode> button again. By pressing the <OK> button it is possible, to select a menu item.

  • Page 13: Type

    User Manual ZFG 3.0 4.5.3 Type If the device is prepared for several measurement types, it is possible to change the current measurement type for measuring (i.e. 300mm/10kg, 300mm/15kg, CBR etc.). 4.5.4 Unit The unit of E -can be shown in MN/m² or MPa.

  • Page 14: Coordinates

    User Manual ZFG 3.0 If no satellite signals can be received (e.g. due to enclosed rooms) soil compaction measurements (incl. data storage) are still possible without position fixing. Note: The power consumption of the device increases when the GPS receiver is switched on.

  • Page 15: Care And Maintenance

    This is shown at the bottom of the battery compartment. • When finished, close the battery compartment and screw it down. Picture 2: ZFG 3.0 with opened battery compartment Instead of batteries, it is also possible to use rechargeable batteries (4x1.2V). In this case, the state of charge is invalid.

  • Page 16: Technical Data

    User Manual ZFG 3.0 Picture 3: Mechanic of LWD Technical data Mechanic and terms Loading device Load plate Handle Top limit stop with release device Guide rod Handle on drop weight Drop weight Transport lock Set of plate springs Anti-tip device...

  • Page 17: Loading Device

    User Manual ZFG 3.0 Loading device Mass of drop weight 10 kg 15 kg Total weight of loading device 15 kg 20 kg Maximum width 200mm Height 1135 mm 1150 mm Maximum drop force 7,07 kN 10,6 kN Pulse duration 17 ms ±...

  • Page 18: Scope Of Delivery

    As required, following additional equipment can be bought. 7.1.1 Carrier bag The carry bag protects the ZFG 3.0 during transportation and measurement. If the ZFG 3.0 is delivered in a carrier bag, the electric measurement lead is 2 m long.

  • Page 19: Printer

    „Printer battery empty“ appears. The battery of the printer has to be charged using the provided AC-adapter. 1. To use the printer, connect it to the ZFG 3.0. Use the provided lead (Mini-USB – 3.5mm plug) and insert the 3.5mm plug into the provided jack (see Picture 1 No.

  • Page 20: Charge Printer

    7.1.3.3 Self test of printer To check the printer without the ZFG 3.0, it is possible to run a self test. Disconnect the Printer from the ZFG 3.0. Switch off the printer (wait one minute). Press <FEED/ENTER> button, longer than 3 seconds, a test printout will be created. Firmware version and a set of characters will be printed.

  • Page 21: Technical Data

    User Manual ZFG 3.0 7.1.3.6 Technical data Type of printer Thermal printer Type of paper Thermal paper; width: 57mm, Ø: max. 31mm Power supply Battery 4xNiMH mignon (AA) cells, 1500mAh, rechargeable AC-adapter unregulated wall plug transformer; 6V, 500mA Time of charging for fully discharged batteries is approx. 4 hours.

  • Page 22: Software

    User Manual ZFG 3.0 7.1.6 Software The software comes on a CD, along with an USB-SD adapter. 7.1.6.1 Short manual A detailed manual for the software is on the installation CD, is generated by the software by pressing „F1“ or can alternatively be accessed in the menu Help/Show Manual.

  • Page 23: Calibration

    User Manual ZFG 3.0 Calibration According to German standard, LWDs have to be calibrated annually. Calibration points ZORN INSTRUMENTS e. K. HOCHPRÄZISIONS PRÜFTECHNIK Kalibrierstelle Benzstr. 1 39576 Stendal Germany Tel.: +49 3931 / 25273 0 Fax: +49 3931 / 25273 10 info@zorn-instruments.de...

  • Page 24: Correlations

    User Manual ZFG 3.0 Correlations For information purposes only, no guarantee of information correctness Quote from German ZTVE- STB 09, Research Institute for Road and Traffic (Edition 2009) 4.5.2 Requirements for deflection modulus The information provided below is based on the 10% minimum quantile.
  • Page 25 User Manual ZFG 3.0 Table A Number of authoritative traffic load construction class more than 3200 1800 to 3200 900 to 1800 300 to 900 60 to 300 10 to 60 up to 10 Table B Road type construction class...
  • Page 26 User Manual ZFG 3.0 For information purposes only, no guarantee of information correctness Quote from Ril 836, Deutsche Bahn AG (German Rail), (20.12.1999 a) 836.0501 Ril 836 - Designing, constructing and maintaining earthworks Page 10 Soils body Principles Route categories in accordance with module 413.0202...
  • Page 27 User Manual ZFG 3.0 For information purposes only, no guarantee of information correctness Construction material and soil engineering institute, Wetzlar Backfilling of trenches Verification of compaction with light drop weight tester in accordance with TP BF-StB Part 8.3 Indicators for the allocation of Compaction ratio D •...

  • Page 28: Warranty

    Only plug in the measurement lead, when the drop weight is on bottom. It is recommended to wear safety shoes. Information on safe disposal ZORN INSTRUMENTS takes back your ZFG 3.0 and the associated load device free of charge for disposal. The customer have to pay the cost for transport and packaging.

  • Page 29: Eu - Declaration Of Conformity

    User Manual ZFG 3.0 EU – declaration of conformity - 27-...
  • Page 32 Benzstraße 1 39576 Stendal Germany Tel. +49 3931 25273 – 0 Fax +49 3931 25273 – 10 www.zorn-instruments.com info@zorn-instruments.com...

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