HMP LFG4 Reference guide

TheLightWeightDeflectometer HMP LFG4 
Briefinstructions*
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Keyfunctions
 Switchon/offmeasuringinstrument
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 Selectupward
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 Selectdownward
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 Confirmselection/Startaction
Menufunctions
Measuring Takingmeasurement 
Measureddata Read/Print 
USB 
Delete 
HMPtransfer 
Settings Display Date
  Time
  Language
Device Dropweight
  GPS
  Unit
  Calibr.date
Printer Printhead
  Date/time
  Graphics
  Contactdata
Byconfirmingthemenuitem»Back«youalwayscomebacktothepreviousmenu.
Loading
mechanism
Load plate
Release mechanism
Bubble level
Guide tube
Drop-weight
Transportation lock
Resilient element with disc springs
Sensor socket
(to connect the measuring cable)
Fig. 1: Light Weight Deflectometer
Ente
r
Measuring cable
USB port
Printer port
Fig. 2: Electronic settlement
measuring instrument

Rev.2018‐07‐16
PreparingtheTest
 Placetheloadplateonplaingroundsuchthatfull‐
areasupportisensured.
 Positiontheloadingmechanismontheloadplate.
 Disengagethetransportationlock.
 Interconnect the settlement measuring instrument
andtheloadplatebythemeasuringcable.
 Switchonthesettlementmeasuringinstrument.
 Confirmthe»Measuring«mode.
 Thepromt»Precompactthreetimesplease«pops
uponthescreen.
 Precompactthesoilthreetimes:
 Engage the drop weight on the release
mechanism.
 Usethebubbleleveltoaligntheguidetubeuntil
itisinverticalposition.
 Releasethelever.
 Catchthereboundingdrop‐weightbyhand.
MeasuringProcedure
Thebasesettingsoftheelectronicsettlementmeasuringinstrumentcomplywiththeordereddevicetype.
Individualadjustmentscanbecarriedoutinthe“Settings”menu.
Startmeasuring
 Startthemeasuringprocessbypressingthe[Enter]
key.
 An acoustic signal is emitted, and on the screen
appearstherequest»Initiatemeasuring«.
 Successivelyperform3impacts.
Handle the drop‐weight as described for pre‐
compactingthesoil.Thereadinessformeasure‐
ment only insists during displaying »Initiate
measuring«.
 ThevaluesofsettlementamplitudesS1,S2andS3
aredisplayedonthescreen.
 After the third measurement the individual
settlement amplitudes and the average
settlementS
m
aswellasthepath‐speed‐ratios/v
andthecalculatedE
vd
‐valuearedisplayed.
Storeandprintcurrentmeasureddata
Uponcompletionofonetestseriesthefollowing
functionscanbechosenbypressingkeys:
 Save: Store the current test series under the
displayedtestseriesnumber
 Delete: Deletethecurrenttestseriesandreturn
tomainmenu
 Print: Printoutthecurrenttestseries
 Back: Returntothemainmenu
Hintsformaintenanceandservicing
ForalonglifeandreliableoperationofyourLightDrop‐
WeightTester,werecommend:
Beforeuse:
 Wipetheguidetubewithaslightlyoilyragtoensure
unhinderedmovementofthedropweight(useonly
acidfreeoil).
Afteruse:
 Wipeoffanydirtandwetnessofthedevice.
 Oilslightlyreleasemechanismanddropweight.
 Control the drilling of the transportation lock and
removeexistingslotsandburrrespectively.
Monthly:
 Checkreleasemechanismandoilslightly.
 Checktransportationlockandoilslightly.
 Checkdropheight. 
(specifiedsize:seecalibrationsignondropweight)
Theinstructionmanual,testcodesforusingtheHMPLFG,PCsoftwareaswellasvideoswithHMP
imageandusingHMPLFGandHMPPDGpleasefindonsuppliedUSBstick.
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Re‐calibrationisrequieredatleastannuallyandafteranyrepair.
(InconformancewiththeGerman»TechnicaltestcodeforsoilandrockinroadconstructionTPBFStBpartB8.4,Issue2016«)
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* TheseBriefInstructionsarenotasubstitutefortheInstructionManual.
Therighttointroducetechnicalmodificationsisreserved.