Users‘ manual

Electronic TheodoliteFET 420K / FET 405K

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CONTENTS

1) Important 3 2) Usage 3 3) Features(1) 4 4) Features(2) 4 5) Displayindication 5 6) Operatingpanel 5 7) Preparationformeasurement 6 8) Poweron 7 9) Batteryindication 810) Batteryreplacement 811) Anglemeasurement 912) HorizontalangleOSet 913) Measuringhorizontalandverticalangle(HR,VorHL,V) 1014) Modeconversionofhorizontalrightward(HR)andleftward(HL) 10 turningincrement15) Horizontalanglelocked-unlocked 1116) Measurementofzenithdistance,verticalangleandheightangle 1217) Angularrepeatedmesurement 1318) Functionsetting 1419) Settingmethods 1420) Factorysettings 1521) Errordisplay 1522) Mountanddismountofthebaseplate 1623) Checkandadjusting 1624) Technicalspecification 2225) Careandcleaning 2226) Intendeduseofinstrument 2227) Safetyinstructions 2328) Specificreasonsforerroneousmeasuringresults 2329) Electromagneticacceptability(EMC) 2330) CE-conformity 2331) Guarantee 2432) Exceptionsfromresponsibility 24

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1 IMPORTANT! READTHISBEFOREUSINGYOURINSTRUMENT

Makeafullcheckfortheinstrumentbeforeusingit.Besurethattheinstrument’sfunctions, power,originalsettingsandrevisedparametersmeetyourrequirementsbeforeyouoperateit.

Toavoiddirectsunlighttotheinstrument’slens,neverleavetheinstrumentexposedtoex- tremeheatlongerthannecessary,oritcouldaffecttheinstrument’saccuracy.

Whenmountingordismountingtheinstrumenttoorfromthetripod,holdtheinstrumentbyone hand,turnthecentralscrewonthetripodbytheotherhandtopreventtheinstrumentfrom falling.Iftheinstrumentmustbecarriedonthetripod,holdtheinstrumentasverticallyas possible.Nevercarrytheinstrumenthorizontallyoveryourshoulder.Anylongdistancetransport shouldbedonewiththeinstrumentinthecarryingcase.

Puttheinstrumentinthecarryingcasetoavoidextrusion,crashandshockduringthetranspor- tation.Shockproofcushionshouldbenecessarilyputinsidethecarryingcaseduringthelong distancetransportation.

Cleanthedirtonthesurfaceoftheorganicglassandplasticbyflossorbrushafterusingthe instrument.Drytheinstrumentintimeafteruseintherain.

Donotuseharshchemicalstocleanthesurfaceoftheorganicglassandplasticcomponents. Awaterdampenedragisallthatisnecessary.

Useabsorbentcottonorlensestissuetocleantheexposedopticalparts.Handkerchief,clothes orotherthingslikethatareforbiddenforcleaning.

Theinstrumentshouldbestoredinanareaoflowhumidityandgoodventilation,wherethe temperaturewillnotexceed110ºF(45ºC).Itshouldbenecessarytoreplacethedesiccant regularlyinthecarryingcase.

Alwaysremovethebatteriesbeforestoringtheinstrument.Pleasecontactourcompanyiftheinstrument’sfunctionsappearabnormal.Non-professional

repairersareforbiddentodisassembletheinstrument.

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2 USAGE

ElectronicDigitalTheodoliteFET420/405Kserieshasadoptedincrement-modedigitssystem foranglemeasurement. Theresolvingpowerofhorizontalandverticalanglescanreach10”. Theprecisionofanglemeasurementcanreach20”. ElectronicDigitalTheodoliteFET420/405Kcanbewidelyusedin3-4classnationaltriangle controlmeasurement,preciseleadmeasurement,engineeringmeasurementformine,railway waterconservancyandsoon,landformmeasurement,andalsocouldbeusedintheassembly ofthelargemachineryfacilities. Thedisplaysareilluminatedsoastomakeitconvenienttooperateinthedarkerenvironment.

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4 FEATURES(2)

1) Focusingknob 2) Opticalplummet 3) Communicationplug 4) Footscrew 5) Batterycompartment 6) Telescopeeyepiece 7) Verticalclampknob 8) Verticaltangentscrew 9) Clampoftribrach

3 FEATURES(1)

1) Opticalsight 2) Objectivelens 3) Horizontalclampknob 4) Horizontaltangentscrew 5) Display 6) Operatingkeys 7) Tripodbaseplate 8) Carryinghandle 9) Handlescrew10) Instrumentcentermark11) Platevial12) Circularvial

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6 OPERATINGPANEL

Button Function FUNC Optionalfunctionkeys Lightingswitchfordisplaywindow REP Repeatedanglemeasurement HOLD Holdhorizontalangle V/% Verticalangledisplay Verticalangle/percentdisplay R/L Optionofleft/righthorizontalangle 0SET 0SETforhorizontalangle Powerswitch Movecursorleftward Movecursorrightward Alterthenumbercursorindicated

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5 DISPLAYINDICATION

1) Ht Generalvalueofrepeatedmeasurements 2 V Verticalangle 3) Numberofrepeatedmeasurements 4) AVG Averageofrepeatedmeasurements 5) HR Righthorizontalangle 6) HL Lefthorizontalangle 7) TILT Inclinecompensatorfunction 8) F Optionalfunctionkeys 9) G AngleunitGON10) % Verticalslope%11) REP Stateofrepeatedmeasurement12) BAT Batterystateindication

Ifdisplayshows“b”afteractivatinginclinecompensation function,whichmeansexceededcompensationrange,the instrumentshouldbelevelled.

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7 PREPARATIONFORMEASUREMENT

Levelandcentertheinstrumentpreciselytoensureitsbestperformance.

a Mountthetripod Firstlyplacethetripodlegstoasuitablepositionandtightenthelockingdevice. b Mounttheinstrument Attachtheinstrumenttothetripodcarefully,andthenmovetheinstrumentbyloosening centerscrew.Lockslightlythecenterscrewonthetripodwhentheplummetiscentered abovethemark. c Roughlyleveltheinstrumentwiththecircularvial 1Usefootscrew1,2tomovetheairbubbleinthecircularvialsoitiscenteredlefttoright. 2Usefootscrew3tomovetheairbubbletothecenterofthevial.

d Finetuneleveltheinstrumentwiththeplatelevel 1Loosenhorizontalclampknob.Turntheinstrumenttoplacetheplatevialparallelwith thefootscrew1,2.Centerthebubbleusingthesetwofootscrews.Attention:Turnthetwo footscrewsreverselywhenyouadjustthem. 2Turntheinstrument90°andcenterthebubbleusinglevelscrew3. 3Repeatstep1,2everytimetheinstrumentisturned90°tocenterallthebubblesinthese positions.

4ReturntotheoriginalpositioninstepA.Rotatetheinstrument180°.Theplatevialis mountedcorrectlyandtheinstrumentislevelednicelyifthebubbleiscenterednomatter theinstrumentisrotatedinanydirection.Atthepositionofstep1,rotatethecollimating section180°.Theplatelevelismountedcorrectlyandtheinstrumentislevellednicelyif thebubbleiscenterednomatterwhatdirectionthecollimatingsectionisrotated.

Pleasepayattentiontotherelationsbetweentheturningdirectionofthelevelscrewsand themovingdirectionofthebubble.

Adjusttheplatelevelifthebubbleisnotcenteredinstep4

e Centeringtheinstrumentusingtheopticalplummet Adjusttheeyepieceaccordingtotheobserver’seyesight,thenmovetheinstrumentby looseningcenterscrewuntiltheimageofthesignonthegroundcenteredinthecircleof thereticule.Movetheinstrumentcarefullyincaseitappearsincline.

f Finallevellingoftheinstrument Leveltheinstrumentpreciselyinthesimilarwaytostep4.Rotatetheinstrumenttoseeif thebubbleintheplatevialiscentered,thentightenthecenterscrew.

8 POWERON

a Whenpressingthebuttonby1sec.audiotonesoundsandafteratest periodofabout2secondsinwhichallsegmentsaredisplayedinstrumentis readyforuse. b Movetelescopetoactivateverticalanglereading. c PushV%buttontoshowverticalangle“0”point.

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Target“0”

Theinstrumenthasbeenequippedwith“0”pointerintheverticalscale panelinordertosettheverticalangle“0”point.Rotatethetelescopeto passasensorthroughthezeropointerandstartanglemeasurement.The “O”pointissetnearthehorizontalplace,soitiseasytosetthevertical “0”byrotatingthetelescope.

Theinstrumentcanmeasurehorizontalanglewithout0setforthespecifi- cationoftheverticalplate.

Fortheinstrumentequippedwiththeautomaticcompensatory“0”setdevice,thevertical specificationcannotbecompensated“0”setautomaticallyifthedegreeoutofthevertical exceedsthedesignrange,andtheinstrumentwilldisplaysymbol“B”.Theinstrumentwill notberecovereduntilitisreleveledpreciselyandthesymbol“B”disappears.

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10 BATTERYREPLACEMENT

a Removingthebattery Pushdownthepressbuttonandremovethebatterycompartment. bBatteryreplacement Pushdownthehooktopullcoverboardawayfromthebatterycompartment. Replacetheoldbatteriesbynewones.Takecareofcorrectpolarity. Snapthebatterycoverbackintoplace. cMountingbatterycompartment Sliptheprojectiononthebottomofthebatterycompartmentintotheslot.Pushthepress buttonontopofthebatterycompartmentuntilitclicksintoplace.

9 BATTERYINDICATION

Thebatterysymbolonthedisplayshowsthecurrentbatterystate.

Fullpower Effective Effective Lowpowerbuteffective,replacethebattery. Instrumentwillshutoffautomaticallyshortly.Replacebatteriesimmediately.

Batteryoperatingtimewillvarydependingontype,brandandqualityofthebattery.We suggestalwaystosecurefora2ndstandbybatteryset. Foranyquestionsaboutreplacingbatteries,seechapter“batteryreplacement”.

11 ANGLEMEASUREMENT

Verticalplateleft/rightobservation “Plateleft”meanstheverticalplateisontheleftsidebythetelescopewhentheobserverfaces theeyepiece.“Plateright”meanstheoppositetothe“plateleft”.Takingtheaveragereadingof the“plateleft”and“plateright”astheobservationvaluecaneffectivelyremovethecorrespon- dingeffectontheobserverfromthesystemerrorsintheinstrument.Therefore,turntheteles- cope180°forthe“plateright”observationaftertheaccomplishofthe“plateleft”duringthe observationofthehorizontalandverticalangle.

Targetaim Pointthetelescopeatthebrightnessandfocustheeyepieceuntilthecrosshaircanbeseen clearly.(Turnthefocusingknobinthedirectionfacingtheobserver,thenfocusinreverse direction.) Aimatthetargetcoarselyusingthecoarseaimingdevice.Thedefinitespacecanbekept betweenthedeviceandtheobserverwhenaimingcoarsely. Focusthetargetbyturningthefocusingknobonthetelescope. Attention: Thevisualerrorsofthetargetandreticulecrosshairwillbecreatedinthehorizontalandvertical directionifthetelescopeortheeyepiecearenotfocusedprecisely,whichcanresultinthe measuringerrors.Focusforthetelescopeandeyepieceshouldbenecessarytoremovethe visualerrors.

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12 HORIZONTALANGLEOSET(OSET)

OPERATINGPROCESS DISPLAY

AimattargetAusingcrosshairofthetelescope.

Press0SETkeyoncetosetreadingofhorizontalangle0°00’00”:

0SETkeyisonlyeffectivetothehorizontalangle.

Horizontalanglecanbeset0atanytimeexcepttheholding state(HOLDkey).

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13 MEASURINGHORIZONTALANDVERTICALANGLE(HR,VorHL,V)

Horizontalrightwardturningincrementandverticalanglemeasurement/HR,V)

OPERATINGPROCESS DISPLAY

AimattargetAusingcrosshairofthetelescope.

Press0SETkeyoncetosetreadingofhorizontalangle0°00’00”.

TurninstrumentclockwiseandaimatthesecondtargetBtogetits horizontalandverticalangle.

14 MODECONVERSIONOFHORIZONTALRIGHTWARD(HR)ANDLEFTWARD(HL) TURNINGINCREMENT

OPERATINGPROCESS DISPLAY

Aimattarget“A”usingcrosshairofthetelescope.

PressR/Lkey,transformhorizontalanglemodeHRinto themodeHL.

MeasuringbymodeHL.

R/Lkeyisofnoeffecttotheverticalangle. PressR/Lkeyagain,transformmodeHLintomodeHR.

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15 HORIZONTALANGLELOCKED-UNLOCKED

Duringtheprocessoflevelobservation,pressHOLDkeyoncetokeepthemeasuringangle. Afterthehorizontalangleheld,thevalueofthehorizontalangleonthedisplaywindowblinks. Thereisnochangetothehorizontalangleeveniftheinstrumentisrotated.Whenthedirection aimedcorrectly,pressHOLDkeyonceagaintounlocktheholdingstate.Thedirectionofthe horizontalangletheinstrumentcurrentlyaimedisjusttheanglelockedbefore.

OERATINGPROCESS DISPLAY

Turnthetangentknobandplacetherequiredhorizontal angle.

PressHOLDkeyonce,holdandflickerthevalueofthe horizontalangle.

Aimatthetarget.

PressHOLDkey,noblinkandholdtothevalueofthe horizontalangle.

HOLDkeyisofnoeffecttotheverticalangle.

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16 MEASUREMENTOFZENITHDISTANCE,VERTICALANGELANDHEIGHTANGLE

Theverticalangleshouldbeoriginallysetaccordingtotheneedsbeforetheoperation.

ZENITHDISTANCE Ifchoose0°fortheverticalangleasthezenithdirection,themeasuredverticalangleV isthezenithangle. ZENITHDISTANCEV=(L+360°-R)/2 SPECIFICATONERRORi=(L+R-360°)/2

VERTICALANGLE Ifchoose0°fortheverticalangleinleftdirection,themeasuredverticalangleVisthe verticalangle. VERTICALANGLEV=(L+180°-R)/2 SPECIFICATIONERRORi=(L+R-540°)/2

HEIGHTANGLE Ifchoose0°fortheverticalangleinbothleftandrightdirection,themeasuredvertical angleVistheheightangle. HEIGHTANGLEV=(L+R)/2 SPECIFICATIONERRORi=(L–R)/2 ATTENTION:IfSPECIFICATIONERROR|i|≥10“inspectandadjustaccordingtothe instructionmanual.

SLOPEPERCENTMODE(slopeanglemeasurement) Measuringinanglemode,theverticalanglecouldbetransformedintopercentofgrade. Thepercentofgradevalue=H/D*100%: Therangeofgradepercentisfromthehorizontaldirectionto±45°.

OPERATINGPROCESS DISPLAY

PressV%keytoswitchfromverticalangularmeasure- mentshownindegreestopercent.

PressV%keyonceagainbacktotheangularmeasure- mentshownindegrees.

Anyangleexceeding100%thepercentofgradewillbe shownas“-----”onthedisplay.

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17 ANGULARREPEATEDMEASUREMENT

OPERATIONPROCESS DISPLAY

1 PressFUNCkey. 2 PressREPkeytoputtheinstrumentinrepeatedmode. 3 AimattargetAandpress0SETkeyoncetosetthefirst targetreading0°00’00”. 4 Turnthehorizontaltangentknobtoaimatthesecond targetB. 5 PressHOLDkeytoholdthehorizontalangleandstorein theinstrument. 6 TurnthehorizontaltangentknobtoaimatthetargetA again.PressR/Lkeytoreleasetheangleandkeepthe state. 7 TurnthehorizontaltangentknobtoaimatthetargetB again. 8 PressHOLDkeytoholdthehorizontalangleandstorein theinstrument.Doubleandaverageangle-valuewillbe shownonthedisplay. 9 Repeatsteps7and8accordingtomeasuringrequires.10 Backtonormalangularmeasurement,pressFUNCkey, thenpressHOLDkey.

Thereadingofhorizontalanglecouldreachatleast±2000°00’00”whenmeasuringin “Plateleft”or“Plateright”mode.Thefive-secondsreadingcouldreachatleast ±1999°59’59”. Therepeatedmeasurementshouldbelimitedwithin15timeswhentheinstrumentisinthe repeatedmode,otherwiseanerrorwillbeshown. ErrorE04willbeshownonthedisplaywhenmeasurederroreverytimeexceedsorequals ±30”duringtherepeatedmeasurement,gobacktostep3. PressFUNCkey,thenpressHOLDkeytobacktotheoriginalstate.

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18 FUNCTIONSETTING

Theinstrumentsuppliesmulti-functionsforyouroptiontomeetdifferentrequiresof measuringconfiguration.

ITEM INSTRUCTION PARAMETERSETTING

1 Minimumrea- Changebetween10“ Setting0 Setting1 ding and20“ 10“ 20“

2 Quadrant Confirmevery90° Setting0 Setting1 signaltone bysignaltone off on

3 Unitofangle ChangebetweenDEG, Setting0/DEG Setting2/MIL measurement (degree),GON,MIL Setting1/GON Setting3/DEG

4 Autoshut-off Setintervalforauto- Setting0/Off Setting2/20min. maticshut-off Setting1/10min. Setting3/30min.

5 Measuring Set„0“pointofvertical SettingO Verticalangle modefor angle (0inhorizontal) verticalangle Setting1 Zenithangle (0inzenith) Setting2 Heightangle+/- (0inhoirzontal)

6 Automatic Setincline Setting0 Setting1 compensation correctionfunction Off On

7 Datatrans- Setdatatransmission Setting0 Setting1 mission function Off On

19 SETTTINGMETHODS

Powerontheinstrument,pressFUNCkey,thenpress key.Theinstrumententersthestate oftheoriginalsettingmode,displayasfollows:

Toselecttherequiredparameteruseandkeys. Tochangetocorrectparameterusekey. TostorethesettingspressFUNCkeyfirstandthen. Thesettingswillbestoredeveniftheunithasbeenshutoff.

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21 ERRORDISPLAY

DISPLAY ERRORCONTENTANDDISPOSAL

B Verticalcompensatoroutofcompensatingrange. Leveltheinstrumentagain.

E00 Collimaterotatingtoofast.Press0SETkeytoset0. If“E00”isshownagaininstrumentneedstoberepaired.

E01 Telescopeturningtoofast,pressV/%keytoset0fortheverticalplate specification.

E02 Interiorerrorofthehorizontalanglemeasuringsystem.Poweronthein- strumentagain.Iferrorisshownagaininstrumentneedstoberepaired.

E03 Interiorerroroftheverticalanglemeasuringsystem. Iferrorisshownagaininstrumentneedstoberepaired.

E04 Differencebetweeneveryvalueexceeds30“duringtheanglerepeated measurement,press0SETkeyandmeasurerepeatedly.

E05 Numberofanglerepeatedmeasurementexceed15,presskeyandmeasure repeatedly.

E06 Errorsduringtheprocessoftheverticalangle0setoradjusting0setwhen theclampangletothehorizonexceeds45°.Needadjustingrepeatedly.

Attention: Fullycheckeverypartoftheinstrumentandseewhethertheoperationcoincideswiththe proceduresaftertheerrorappears.Iftheerrorcodeisstillshownaftermanychecksplease sendtheinstrumentforrepair.

20 FACTORYSETTINGS

Minimumreading 10“ Quadrantsignaltone off Unitofanglemeasurement 360° Automaticshut-off off Verticalanglemeasuring-mode zenithangle Automaticcompensation off Datatransmission off

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22 MOUNTANDDISMOUNTOFTHEBASEPLATE

Looseningortighteningturninghandlecaneasilymountordismounttheinstrumenttoorfrom thebaseplate.

Dismount Turnthefixedpullhandle180°counterclockwise.Holdthebaseplatebyonehand,bringup theinstrumentusingthecarryinghandlebytheotherhand. Mount Bringuptheinstrumentbyhandandaimtheorientationblockattheorientationslot.Mountthe instrumentonthebaseplatecarefully.Tightenthefixedpullhandleonthebaseplate.

23 CHECKANDADJUSMENT

Adjustmentinstruction

Adjusttheeyepieceandfocusitpreciselytoavoidthevisualerrorsbeforetheobservation throughtelescope. Adjustmentshouldbecarriedoutonebyoneaccordingtothefollowingstepsbecauseeach step’sadjustmentisbasedonitsformerone’sresult.Disorderthestepswilldefaulttheadjust- ment. Tightenthescrewaftertheadjustment!Thestrengthappliedshouldbesuitablebecause overtightenwilldamagethethread. Aftertheadjustmentrepeattheinspectiontomakesurethattheadjustmenthasbeenwell done.

Inspectandadjusttheplatevial

Inspection Maketheplatevialparallelwithtwofootscrewsamongthethreeones. Centeritsbubblebyadjustingthetwofootscrews. Turntheinstrument180ºandobservethebubble.Adjustmentisneeded ifthebubbleisnotcentered. Adjustment Calibratetheplatevialbyusingtheadjustingpintoadjustitsscrewto makethebubblemovecenter-orientedhalfwayoftheoffset. Theotherhalfwaywillbeoffsetbyperformingtheadjustmentofthe twolevellingscrews,whichareparallelwiththelongvial. Turntheinstrument180°andcheckifthebubbleiscentered.Ifnot, repeatthestepsmentionedabovetillthebubbleiscentered. Turntheinstrument90°andcenterthebubblebyadjustingthethird levellingscrew.Repeatthecheckingandadjustmentstepsaboveuntil thebubblestayscenterednomatterinwhichdirection.

Offset 1/2

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Inspectandadjustthecircularvial

Inspection Ifthecircularvialiscenteredcorrectlyafterlevellingtheinstrumentaccordingtothelongvial, thennofurtheradjustmentisnecessary.Ifnot,pleaseproceedwiththefollowingadjustment. Adjustment Therearethreeadjustingscrewsonthebottomofthecircularvial.Whenadjusting,loosenthe screwoppositetothebubble’smovingdirection(oneortwo),thentightentherestscrews alongthebubble’smovingdirectiontocenterthebubble.Thetighteningstrengthofthese threescrewsshouldbecoincided.

Adjusting screw

The bottom part Circular vial

Thetelescopereticule Inspection Mounttheinstrumentonthetripodandlevelitcarefully. SettargetpointA50meterstotheinstrument,aimatpointAbythestadiahairs. TurnthetelescopeandobservepointAwhetheritmovesalongtheverticalhair. IfpointAmovesalongtheverticalhair,thatmeanstheverticalhairisperpendiculartothe horizontalaxis,thennofurtheradjustmentisnecessary. AdjustmentisnecessaryifpointAmovesdeviatedfromtheverticalhair

Adjustment Turncounterclockwiseandremovethereticlecoverbetweentheeyepieceandfocusingknob, Thiswillexposefourreticlefixingscrews. Loosenthesefourfixingscrewsequablybyscrewdriver.Turnthereticlebasearoundthevisual axistosetpointAontheverticalhair. Tightenthesefourfixingscrewsequablyandobservewhetheranydeviationappearswhen pointAmovesalongtheverticalhair.Ifnot,theadjustmentisover. Assemblebackthereticlecovertoitsoriginalposition.

A

A'

A

A'

Adjusting screw

Fixing screw

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Perpendiculardegreeofthevisualaxistothehorizontalaxis

Inspection Settwoobvioustargetsashighastheinstrumentabout100metersapartwiththeinstrument intheircenterpoint. Leveltheinstrumentpreciselyandpoweriton. AimattargetAusingcrosshairofthetelescopeplate-leftward. Loosentheverticalbrakingknob.Rotatethetelescopearoundthehorizontalaxis180°toaim itattheoppositedirection. AimattargetBwiththesamedistancetotargetA Rotatethehorizontalbrakingknobtoturntheinstrument180°. AimatthetargetA,thenlocktheknob. Rotatetheverticalbrakingknobtoturntheinstrument180°.AimattargetC.TargetC shouldbesuperposedtotargetB.Ifnot,adjustmentisnecessary.

Adjustment Removethereticulecoverbetweentheeyepieceofthetelescope andthefocusingknob. SetuppointDbetweenpointBandC.ThedistanceofDCshould beaquarterofBC.Adjustthetwoadjustingscrewstomovethe reticuletohaveitscrossaimatpointD. RepeataboveinspectionandadjustmentstepsuntilBandCare superposed. Assemblebackthereticulecovertoitsoriginalposition.

Loosenonescrewiftheverticalhairofthecrosshairshouldbe moved,thentightentheotheroneinthesameturn.Loosenthescrew counterclockwiseandtighteninclockwisedirection.Theturnshould beaslittleaspossiblenomatterloosenortighten. Aftertheadjustmentabove,thezeroresetoftheverticalangleshouldbe carriedout.

Adjusting screw

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Automaticcompensationoftheverticalaxis

Theinstrumentisequippedwiththeelectronicinclinesensordevice,whichcancompensate theverticalaxis.

Check Aftermountingandlevellingtheinstrument,coincidethepointofthetelescopewiththeline betweenthecenteroftheinstrumentanditsanylevelscrew.Thentightenthehorizontal brakingknob. Setzeroforindicationoftheverticalplateafterpower-on.Tightentheverticalclampknoband theinstrumentdisplaysthecurrentvalueoftheverticalanglethetelescopepointed. Turnthefootscrewinonedirectiontill10mm(circledistance).Thevalueofverticalangle alsochangescorrespondinglytillitdisappearsandthesymbol“b”isshown,whichmeansthe inclineoftheinstrument’saxishasexceededoutofthecompensatedrange.Whenturningthe levellingscrewinreverse,theinstrumentreturnstodisplaytheverticalangle(repeattestingand observethechangesonthecriticalpoint),whichmeansthecompensationdeviceworkswell.

Adjustment Whenthecompensationdoesn’tworkwellorworksabnormally,sendtothefactoryforrepair.

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Verticalplateanglespecification(“i”angle)andits0set

Check Aftermountingandlevelling,powerontheinstrument.Aimthetelescopeatanycleartarget AtogetthereadingL,whichistheuprightangleplateleftwardreading. TurnthetelescopeconverselyandaimattargetAagaintogetthereadingR,whichistheup- rightangleplaterightwardreading. Ifuprightangleisinthezenithanglemode,theni=(L+R-360°)/2. Ifuprightangleisintheverticalanglemode,theni=(L+R-180°)/2ori=(L+R-540°)/2 Ifuprightangleisintheheightanglemode,theni=(L–R)/2 Ifthespecificationerrors|i|≥10”,0resetoftheuprightplateisnecessary.

Adjustment

Operatingprocedures Operation Display

Leveltheinstrumentaccuratelywiththe platevial.

Powerontheinstrument,theverticalangle andhorizontalanglearedisplayedafterupright Rotatethetelescope passeszeroposition.

PressFUNCkeyonce,andthenpressV/%key. FUNC V%

Rotatetheinstrumentandpreciselyaimatthe Aimattheleft clearandstabletargetAashighastheinstru- positionofAplate mentinthedistance.

Press0SETkeyonce. OSET

Turntheinstrumentandaimtherightofthe Aimattheleft verticalplateatthesametargetA. positionofAplate

Press0SETkeyandthemeasuredvalues OSET areset.Theinstrumentgoesbacktothe anglemeasurementmode,andthecalibration isfinished.

Checkthespecificationerroritoseewhetheritisaccordingtotherequirements.Ifnot,check whethertherightadjustingprocedureisperformed,orwhethertheaimofthetargetispre- cise. Resetasrequired. Sendtheinstrumenttothefactoryforrepairafteroperationsarerepeatedmanytimeswithout anyeffect.

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Otheradjustment

Adjustthetwolevellingscrewsonthebaseplateifthescrewloosens.Thetighteningstrength shouldbesuitable.

Checkandadjusttheopticalplummet

Tosuperposetheopticalaxisoftheplummetandtheverticalaxis,adjustmentfortheplummet isneccessary,otherwisetheverticalaxiswillnotbeonthetrueanchorpointwhentheaim begins.

Inspection Mounttheinstrumentonthetripodandplaceasheetofpaperwithacrossonitunderthe instrument. Afteradjustingthefocusoftheopticalplummet,movethepapertocenterthecrossofthe crosshairinthefieldofview. Turnthecollimator180º,observethesuperposeddegreeofthecentermarkandthecross. Ifthecentermarkoftheopticalplummetandthecrossofthehairkeepsuperposedwhentur- ningthecollimator,adjustmentisunnecessary.Ifnot,adjustit. Adjustment Turncounterclockwiseandremovetheadjustingscrewcoverbetweentheopticalcentering deviceandthefocusingknob. Fixthesheetofpaperwiththecrossonitandmarkthefallenpointofthecentermarkeach timewhentheinstrumentturns90º,shownastheillustration:pointA,B,C,D. LineuppointsonthecrossACandBDtogetthepointoftheirintersectionO. Regulatethefouradjustingscrewsontheopticalplummetwiththeadjustingpintosuperpose thecentermarkandpointO.

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25 CAREANDCLEANING

Pleasehandlemeasuringinstrumentswithcare. Cleanwithsoftclothonlyafteranyuse.

Ifnecessarydampclothwithsomewater:Ifinstrumentiswetcleananddryitcarefully. Packituponlyifitisperfectlydry. Transportinoriginalcontainer/caseonly.

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26 INTENDEDUSEOFINSTRUMENT

Triangle,polygonandengineermeasurementsinthefieldofcivilengineeringaswellas cadastralsurvey.

24 TECHNICALSPECIFICATIONS

FET420K FET405K Telescope: Magnification 30× 30x Clearobjectiveaperture 45mm 45mm Shortestfocussingdistance 1,4m 1,4m Anglemeasurement: incremental incremental Accuracy 4mgon(20“) 1mgon(5“) Shortestfocussingdistance 2mgon(10“) 0,5mgon(2“) Compensator Automatic Automatic compensation compensation Measuringunits 400gon/360°/mil 400gon/360°/mil Display 2xLCD 2xLCD Opticalplummet: Magnification 3x 3x Focussingrange 0,5to∞ 0,5to∞ Vials: Platelevel 8‘/2mm 8‘/2mm Powersupply 4x1,5VAAAlkaline 4x1,5VAAAlkaline Operatingtime 15h 15h Temperaturerange -20°C-+45°C -20°C-+45°C Tribrach detachable detachable Weight 4kg 4kg

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27 SAFETYINSTRUCTIONS

Pleasefollowupinstructionsgiveninoperators’manual.Useinstrumentformeasuringjobsonly.Donotopeninstrumenthousing.Repairsshouldbecarriedoutbyauthorizedworkshopsonly.

Pleasecontactyourlocaldealer.Donotremovewarninglabelsorsafetyinstructions.Keepinstrumentawayfromchildren.Donotuseinstrumentinexplosiveenvironment.

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28 SPECIFICREASONSFORERRONEOUSMEASURINGRESULTS

Measurementsthroughglassorplasticwindows;dirtylaseremittingwindows.Afterinstrumenthasbeendroppedorhit.Pleasecheckaccuracy.Largefluctuationoftemperature:Ifinstrumentwillbeusedincoldareasafterithasbeen

storedinwarmareas(ortheotherwayround)pleasewaitsomeminutesbeforecarryingout measurements.

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29 ELECTROMAGNETICACCEPTABILITY(EMC)

Itcannotbecompletelyexcludedthatthisinstrumentwilldisturbotherinstruments(e.g.navi- gationsystems);

willbedisturbedbyotherinstruments(e.g.intensiveelectromagneticradiationnearbyindustrial facilitiesorradiotransmitters).

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30 CE-CONFORMITY

InstrumenthasCE-markaccordingtoEN61326:1997,EN55022,EN61000-4-2/-3.

geo-FENNELGmbH Kupferstraße6 D-34225Baunatal Tel.+49561492145 Fax+49561497234 Email:info@geo-fennel.de www.geo-fennel.de

08/2008 Allinstrumentssubjecttotechnicalchanges.

32 EXCEPTIONSFROMRESPONSIBILITY

Theuserofthisproductisexpectedtofollowtheinstructionsgiveninoperators’manual. Althoughallinstrumentsleftourwarehouseinperfectconditionandadjustmenttheuser isexpectedtocarryoutperiodicchecksoftheproduct’saccuracyandgeneralperformance. Themanufacturer,oritsrepresentatives,assumesnoresponsibilityofresultsofafaultyor intentionalusageormisuseincludinganydirect,indirect,consequentialdamage,andlossof profits. Themanufacturer,oritsrepresentatives,assumesnoresponsibilityforconsequentialdamage, andlossofprofitsbyanydisaster(earthquake,storm,floodetc.),fire,accident,oranactofa thirdpartyand/orausageinotherthanusualconditions. Themanufacturer,oritsrepresentatives,assumesnoresponsibilityforanydamage,andlossof profitsduetoachangeofdata,lossofdataandinterruptionofbusinessetc.,causedbyusing theproductoranunusableproduct. Themanufacturer,oritsrepresentatives,assumesnoresponsibilityforanydamage,andlossof profitscausedbyusageotherthanexplainedintheusers‘manual. Themanufacturer,oritsrepresentatives,assumesnoresponsibilityfordamagecausedby wrongmovementoractionduetoconnectingwithotherproducts.

31 WARRANTY

Thisproductiswarrantedbythemanufacturertotheoriginalpurchasertobefreefromdefects inmaterialandworkmanshipundernormaluseforaperiodoftwo(2)yearsfromthedateof purchase. Duringthewarrantyperiod,anduponproofofpurchase,theproductwillberepairedorre- placed(withthesameorsimilarmodelatmanufacturersoption),withoutchargeforeither partsorlabour. Incaseofadefectpleasecontactthedealerwhereyouoriginallypurchasedthisproduct. Thewarrantywillnotapplytothisproductifithasbeenmisused,abusedoraltered. Withoutlimitingtheforegoing,leakageofthebattery,bendingordroppingtheunitarepre- sumedtobedefectsresultingfrommisuseorabuse.