User’s HandbookLwL.pdf · 4 stroke engine cycle DIS or waste spark ignition system. Page 5 4.3...

User’s Handbook

ENGINE IGNITION ANALYZER

Table of Contents1. Safety Rules Page 12. Technical Specifications Page 22.1 Generalspecifications Page22.2 Electricalspecifications Page2

3. General description Page 33.1 Instrumentdescription Page33.2Displaydescription Page3

4. Buttons, icons and menus operation Page 44.1POWER/CLEARbuttonandmenu Page44.2CYCLEbuttonandmenu Page44.3 MODEbuttonandmenu Page54.4VIEWbuttonandmenu Page54.5HOLDbuttonandmenu Page64.6Tachometerreadings Page64.7Batterylevelindicator Page6

5. Measurement modes Page 75.1EngineRPM Page75.2Sparkburn(firing)time Page75.3 Sparkplugvoltage Page75.4Dwellangle Page75.5Ramptime Page7

6. Display views Page 86.1Chartview Page86.2Comparisonview Page86.3 Digitalview Page96.4WaveformView Page10

7. Measurement procedures Page 117.1Flexibleprobeandpick-upsetup Page117.2Measuringcoilonplugandcoilnearplugignitionsystems Page117.3Measuringignitionsystemswithsparkplugwires Page12

8. Recharging the instrument Page 139. Maintenance Page 14

10. Warranty Page 14

1. SAFETY RULES• Thisinstrumentisdesignedforindooruseattemperaturesbetween32°and104°F(0°Cand40°C)andaltitudesupto6500ft(2,000meters).

• Toensurethattheinstrumentisusedsafely,followallsafetyandoperatinginstructionsinthisoperationmanual.Iftheinstrumentisnotusedasdescribedinthisoperationmanual,thesafetyfeaturesofthisinstrumentmaybeimpaired.

• Donotusetheinstrumentiftheinstrument,thepick-upsortheflexibleprobelooksdamaged,orifyoususpectthattheinstrumentisnotoperatingproperly.

•Whenusingtheinstrument,keepawayfrommovingparts(fan,drivebelts,etc)andhotobjects(exhaustpipes,muffler,catalyticconverter,etc),toavoidpersonalinjuriesanddamagetotheinstrument,thepick-upsandtheflexibleprobe.

• Donotconnectanythingotherthatthepick-upssuppliedwiththeinstrumentorapplymorethanACorDCpowertothepick-uportheflexibleprobeconnectors.

• Atalltimes,toavoidelectricalshock,useCAUTIONwhenworkingwithelectricalcircuitsabove60VDCor25VACrms.Suchvoltagesposeashockhazard.

• DonotoperatethisinstrumentwhileconnectedtotheACpoweradaptororanyotherdevice.• Toavoidelectricalshockordamagetotheinstrument,donotexceedthespecifiedinputlimits.

Exceeding the limits listed above when using this apparatus, or not observing the precautions listed above can expose you to physical injury and permanently damage

your instrument and/or parts and components of the vehicle under test.

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2. TECHNICAL SPECIFICATIONS2.1 General specifications

Display: 3.5”TFTLCD,320x240pixelsresolution.

Framerate: Upto30timespersecond.

Ignitionsystemcomp.: Coilonplug,coilnearplug,DIS,wastespark,conventional,andmagneto.

Enginecycle: 2or4strokes.

Power(internal): 3.2volt/1500mAh,rechargeableLiFePO4battery.

Autopoweroff: Automaticallypowersoffafter3min.ofinactivity.

Batterylife: Approximately6hoursofcontinuousoperation.

USBconnector(input): MicroUSB(5Volt/0.5AmperesDC).

Probelength: 13.5”(34cm)includingpick-up.

Dimensions: 6.3”x3.9”x1.3”(160x99x34mm)withoutprobe.

Weight: Approximately14oz.or406gwithoutprobe.

Includedaccessories: Sparkplugwirepick-up,coilonplugpick-up,BNCflexibleprobe,protectiverubberholster,paddedhardcarryingcase,microUSBcable,ACpoweradaptoranduser’shandbook.

2.2 Electrical Specifications

• Thespecificationsbelowaretypicalat23°C,andwillvaryslightlyfromdevicetodevice,andwith temperature.The input voltage shouldnot exceed the indicatedmaximumvalues,topreventpersonalinjuryordamagetotheinstrument.

MeasurementMode MeasurementRange Accuracy/Resolution

Tachometer400to19999RPM

2and4cyclesandDIS Accuracy:0.5%±1LSD

Sparkplugvoltage(kV) 0to50kV Resolution:±0.01kV

Sparkburn(firing)time 0to12ms Resolution±0.05ms

Dwellangle 0to>270°(4stroke/600RPM+)0to>180°(2stroke/750RPM+) Resolution:±0.1º

Ramptime(Ignitioncoilprimarycurrentramptime) 0to35ms Accuracy:±0.05ms

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3. GENERAL DESCRIPTION3.1 Instrument Description

3.2 Display descriptionFig.1-Instrumentdescription

Fig.2-LCDDisplay

01607 RPM

-10

10

20

kv

-4 -2 0 2 ms

0

Enginecyclesetting

Modesetting

Displaysetting

Tachometerreading

Batterylevel

Statusindicators

Measurementdisplayarea

MicroUSBconnector

LCDdisplay

POWER/CLEARbutton

CYCLESbutton

MODEbutton

BNCconnector

Protectivehoster

HOLDbutton

VIEWbutton

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4. BUTTONS, ICONS AND MENUS OPERATION

4.1 ‘POWER/CLEAR’ button

•WhentheinstrumentisOFF,toturnitONpressandholdthe‘POWER/CLEAR’ buttonuntiltheunitturnson(inapproximately1second).

•WhentheinstrumentisON,toturnitOFFpressandholdthe“POWER/CLEAR’buttonuntilthedisplayturnsOFF(inapproximately3seconds).

•When the instrument isON, press the ‘POWER/CLEAR’ button to clear allmeasurementdata,andstartanewmeasurement.Thisoperationcanbealsobeperformedtore-scalethemeasurementsandoptimizeviewinginthedisplay.

•The ‘AutoPowerOff’ featurewillautomatically turn the instrumentoffafter3minutesofnobuttonbeingpressedor15secondsafterthelastsparksignalwasdetected.Turningtheunitoffmanuallywhennotinusewillprolongbatterylife.

4.2 ‘CYCLE’ button and menu

• The‘CYCLE’buttonallowsselectionofthenumberofstrokescorrespondingtotheengineundermeasurement.Uponpressingthisbutton,apulldownmenuwillopenwiththecurrentsettinghighlighted,Tochangethesettingpressthe‘CYCLE’buttonrepeatedlyuntilthecorrectsettingishighlighted,thenwaituntilthepulldownmenucloses.Thenewsettingwillbedisplayedasthecycleiconatthetopofthescreen.

01607 RPM

-5-4 -2 0 2 ms

0

4

2

4 Stroke

2 Stroke

Waste Spark

Fig.3-Enginecycleselectionmenu

2strokeenginecycle

4strokeenginecycle

DISorwastesparkignitionsystem

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4.3 ‘MODE’ button and menu The ‘MODE’ button allows the selection of the type ofmeasurement to beshowninthedisplay.Uponpressingthisbuttonapulldownmenuwillopenwiththecurrentsettinghighlighted,Tochangethesettingpressthe‘MODE’buttonrepeatedlyuntilthedesiredsettingishighlighted,thenwaituntilthepulldownmenucloses.Thenewcurrentsettingwillbedisplayedasthemodeiconatthetopofthescreen.

01607 RPM

-5

5

10

kv

-4 -2 0 2 ms

0

Burn Time

Dwell

Tachometer

Voltage

Fig.4-Measurementselectionmenu

Measuring/displayingsparkburn(firing)time.

Measuring/displayingdwellangleorramptime(automaticallyselecteddependingontheconnectedsensor).

Measuring/displayingRPM(tachometer).

Measuring/displayingsparkplugvoltages.

4.4 ‘VIEW’ button and menu

The’VIEW’buttonisusedtoselecthowthechosenmeasurementwillbeshowninthedisplay.Uponpressingthisbuttonapulldownmenuwillopenwiththecurrentsettinghighlighted.Tochangethesettingpressthe‘VIEW’buttonrepeatedlyuntil thedesiredsetting ishighlighted, thenwaituntilthepulldownmenucloses.Thenewsettingwillbedisplayedasthedisplayiconatthetopofthescreen.

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01607 RPM

-10

10

20

kv

-4 -2 0 2 ms

0

Chart

Comparison

Digital

Waveform

Fig.5-Displaymodeselectionmenu

Chart(i.e.trendline)view.

Comparisonview.

Digitalandanaloggaugereadouts.

Waveform(i.e.oscilloscope)view.

4.5 ‘HOLD” button · Whenchart,digitalorwaveformdisplaymodeisselected,pressingthe‘HOLD’buttonwillpausethemeasurement,holdthecurrentdisplay,andtheword“HOLD”willbeshowninthemeasurementareaofthedisplaytoindicatethisstatus.Pressthe‘HOLD’buttonagaintoresumenormaloperation.

· Wheninthecomparisondisplaymode,thisbuttonisusedtoinitiateandstopameasurement.Fordetailssee‘6.2Comparisonview’.

4.6 Tachometer readingDigitalreadoutoftheengineRPM.

4.7 Battery level indicator Thebatterylevelindicatorprovidesanapproximateindicationofthestateofchargeoftheinternalbattery,asfollows:

Full

Empty

NOTE: Theinstrumentwillturnautomaticallyoffifthebatteryvoltagefallsbelowtheabsoluteminimum.

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5. MEASURING MODESThere are four different ignition systemparameters that can be selected formeasurement,dependingontheengine’signitionsystem:•EngineRPM.

•Sparkburn(firing)time.

•Sparkplugvoltage.

•Dwellangles(forignitionsystemsequippedwithhighvoltagesparkplugwires).

•Primaryignitioncoilcurrentramptime(forcoilonplugandcoilnearplugignitionsystems).

5.1 Engine RPMMeasuresengineRPM(revolutionsperminute)in2and4strokeengines,andmaybeusedincombinationwithothermeasurementstoevaluateignitionsystem performanceatdifferentenginespeeds.

5.2 Spark burn (firing) timeThe spark burn time, also called “firing time”, is themeasurement of the period fromthemomentasparkisinitiateduptothepointwhenit isextinguished,andisthemostindicativemeasurementofperformanceoftheignitionsystem.Abnormallylongorshortburntimesmayindicatesomeproblemintheignitionmodule,sparkplug,fuelmixture,cylindercompression,etc.

5.3 Spark plug voltageSparkplugvoltagevaluesareusefulforcomparingtheperformanceoftheignitionsystembetweencylinders.Thismaybeusedtodiagnosecommonproblemslikemisfires,brokensparkplugwires,etc.Sparkplugpeakvoltagesmayvarywidely,arelessconsistentandnotalwaysindicativeofaproperlyworkingignitionsystem.Ontheotherhand,observationofthesparkplugvoltagewaveformortrendmayproveusefulindiagnosingignitionandmechanicalproblems.

5.4 Dwell angle (for ignition systems using spark plug wires only)Dwellangleisameasurementoftheangleofrotationofthecrankshaft,betweenthemomentinwhichtheprimaryoftheignitioncoilisenergized(e.g.pointcontactsclosed)andthesparkisgenerated(e.g.pointcontactsopened).Itsmainuseisindeterminingifthereisenoughangle(ortime)toenergizetheprimaryoftheignition,andnotsomuchastocausetheignitioncoiltooverheatandfail.DwellanglesarespecifiedforaparticularengineandRPM,andusuallyadjustedinthemechanicaldistributor/pointassembly.

5.5 Current ramp time (for coil on plug and coil near plug only)Ramp time ismeasured fromwhen theprimary coil current first begins to increase towhenitstopsincreasing.Thecurrentmaystopincreasingbecausethecoilhasreacheditssaturationpoint,oritisinterruptedtogenerateaspark.

Ramp timemeasurementsareuseful fordiagnosingproblems in theprimarycircuitoftheignitionmodule.Abnormallylongramptimesmayindicateexcessiveprimarycircuitresistance,lowinputvoltage,thatthewrongmoduleisinstalled,etc.Shorterthannormalramptimesmayindicateashortedprimarycoil,thatthewrongmoduleisinstalled,etc.

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6. DISPLAY VIEWSTherearefourviewsthatcanbeselectedtodisplaymeasurements:

•Chart•Comparison•Digital•Waveform

6.1 Chart viewThisviewdisplaystheselectedmeasurement’svaluecorrespondingtoeachofthelast276sparks,withtheleftmostmeasurementbeingtheoldest,andtherightmostthenewest.Themeasurementscaleandunitsarelocatedontheverticalaxis,atthefarleftofthedisplay.

0S

2

3

RPM

1

01607 RPM

Fig6-Chartmodedisplay

• ‘POWER/CLEAR’ button: PressingthePower/Clearbuttonclearsallvaluesinthechart,andre-scalesthechartifnecessary.

• ‘MODE’ button: Pressingthe‘MODE’buttononcewillopenthemodemenu,andhighlightthemeasurementmodecurrentlyselected;pressingthe‘MODE’buttonagainwhilethemenuisopenwillselectthenextavailablemeasurementmode.Allfourmeasurements(sparkburntime,RPM,sparkplugpeakvoltage,dwellangleandramptime)aresimultaneouslytrackedandstored,andareavailableforviewingatanytime(withoutdelay).

• ‘HOLD’ button: Pressingthisbuttonwillpausethecurrentmeasurement,andholdthedisplayinitsthecurrentcondition.Pressingthe‘HOLD’buttonagainwillresumenormalmeasurement.

6.2 Comparison viewThismodeallows thecomparisonofsetsofvalues (minimum,averageandmaximummeasurements)betweenseveralcylinders,undervarioustestingconditions,andinmanyothersituations.Themeasurementsaredisplayedfromlefttoright,withtheleftmostsetofvaluesbeingtheoldest,andtherightmostthenewest.Anewsetofvaluesisaddedeverytimethe‘HOLD’buttonispressedtwice(start/stop)anduptothelast12setsofvalueswillbeshowninthegraphatonce,ifthismaximumisexceeded,theoldestsetwillbedeletedandanewsetadded.Themeasurementscaleandunitsarelocatedontheverticalaxis,atthefarleftofthedisplay.

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0

10

15

kv

5

01607 RPM

Maximum

Average

Minimum

Oldestset Newestset

Fig.7-Comparisonmodedisplay• ‘POWER/CLEAR’ button: Pressingthe‘POWER/CLEAR’buttonclearsallmeasurements,andre-scalesthechartifnecessary.

• ‘MODE’ button: Pressingthe‘MODE’buttononcewillopenthemodemenu,andhighlightthemeasurementmodecurrentlyselected;pressingthe‘MODE’buttonagainwhilethemenuisopenwillselectthenextavailablemeasurementmode.Allfourmeasurements(sparkburntime,RPM,sparkplugpeakvoltageanddwellangleandramptime)aresimultaneouslytrackedandstored,andareavailableforviewingatanytime(withoutdelay).

• ‘HOLD’ button: The‘HOLD’buttonwhenpressedoncepausesmeasurementandholdsthedisplayinitscurrentcondition(whiledisplayinga“HOLD”labelinthecenterofthescreen).Pressingthe‘HOLD’buttonasecondtimewillremovethepause(andlabel),andaddanewsetofvaluesattherightofthescreen,whichwillkeepupdatinguntilthe‘HOLD’button ispressedagain.Thiscycle repeatsevery time thebutton ispressed twice(start/stop)anduptothelast12setofvalueswillbeshowninthedisplayatonce,ifthismaximumisexceededtheoldestsetwillbedeletedandanewsetadded.

6.3 Digital viewThisviewprovidesdigitalandanaloggaugereadoutsfortheselectedmeasurement,aswellasdigitalreadoutsfortheotherthreemeasurements.

Fig.8-Digitalmodedisplay

• ‘POWER/CLEAR’ button: Pressingthe‘POWER/CLEAR’buttonclearsallvaluesinthegraph,andre-scalesthegaugeifnecessary.

• ‘MODE’ button: Pressingthe‘MODE’buttononcewillopenthemodemenu,andhighlightthemeasurementmodecurrentlyselected;pressingthe‘MODE’buttonagainwhilethemenuisopenwillselectthenextavailablemeasurementmode.Allfourmeasurements(sparkburntime,RPM,sparkplugpeakvoltageanddwellangleandramptime)aresimultaneouslytrackedandstored,andareavailableforviewingatanytime(withoutdelay).

• ‘HOLD’ button: Pressing this buttonwill pausemeasurement, andhold the display in the currentcondition.Pressingthe‘HOLD’buttonagainwillresumenormalmeasurements.

6.4 Waveform ViewThismodedisplaysthesignalamplitudeovertime(likeanoscilloscope).Thescaleandunitsofthemeasurementarelocatedontheverticalaxis,atthefarleftofthedisplay.Thetimescaleandunitsareshownbelowthehorizontalaxis,atthebottomofthescreen.

01607 RPM

-10

10

20

kv

-4 -2 0 2 ms

0

Fig.9-Waveformdisplay

• ‘POWER/CLEAR’ button: Pressingthe‘POWER/CLEAR’buttonclearsallvaluesinthegraph,andre-scalesthegraphifnecessary.

• ‘MODE’ button: Pressing the ‘MODE’ button oncewill open themodemenu, and highlight themeasurementmodecurrentlyselected;pressingthe‘MODE’buttonagainwhilethemenuisopenwillselectthenextavailablemeasurementmode.Thewaveformgraphfocusesontheareaofthesparkwaveformwhichismostrelevanttothemodeselected.

• ‘HOLD’ button: Pressingthisbuttonwillpausethecurrentmeasurement,andholdthedisplayinthecurrentcondition.Pressingthe‘HOLD’buttonagainwillresumenormalmeasurement.

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7. MEASUREMENT PROCEDURES

CAUTIONTo avoid personal injuries and damage to the instrument carefully inspect thespark plug wires, distributor cap, ignition coil , ignitionmodule, and all otherignition system parts for damage or leaks, and avoid using this instrument incase any damage or leaks are found. Never touch the capacitive pick-up or flexible probe during a test. Wear insulating gloveswhenworking around highvoltage, and hot parts, and keep away frommoving parts (fan, drive belts, etc)and hot objects (exhaustmanifold and pipes,muffler, catalytic converter, etc.)

7.1 Flexible probe and pick-up setupThisinstrumentissuppliedwithaflexibleprobe,andtwotypesofpick-upsensors:

• Flexibleprobe:equippedwithaBNCconnectoratoneendandabarrelconnectorattheother.

• COPpick-up:formeasuringcoilonplugandcoilnearplugignitionsystems.

• SPWpick-up:forallignitionsystemswhichusehighvoltagewires(sparkplugwires)toconnecttheignitioncoilordistributortothesparkplug.

COPpick-up SPWpick-up

Flexibleprobe Flexibleprobe

Fig.10-Pick-upconnectiontoflexibleprobe

1-ConnecttheprobetotheinstrumentusingtheirBNCconnectors.

2-InsertandfirmlypresstheappropriateCOPorSPWpick-upintothebarrelconnectoroftheprobe.

NOTE: Theinstrumentwillautomaticallydetectandconfigurethepick-upconnectedtotheprobe.Usingthewrongpick-upfortheignitionsystemundermeasurementmayleadtoerroneousreadings,ornoreadingsatall.

7.2 Measuring coil on plug and coil near plug ignition systems1-Ensuretheinstrumentisturnedoff.

2-InserttheCOPpick-upbarrelconnectorplugintotheflexibleprobereceptacle,removingtheSPWpick-upifnecessary.

3- Turn the instrument on and select the appropriate cycle for the engine undermeasurement.

4-Selectthedesiredmodeandview.

5- PlacetheCOPpick-uponthetopandcenteroftheignitionmodule(asshownintheFig.11),andobservewhethertheinstrumentisabletodetectanddisplaythedesiredmeasurement.

Page11

COPpick-up Ignitionmodule

Fig.11-UsingtheCOPpick-uponaignitionmodule

6-Iftheinstrumentisunabletodetecttheignitionsystemsignal,itmaybenecessarytorepositionthepick-upsothataconsistentsignalisdetectedanddisplayed.

NOTES

• The position of the pick-up and the particular design of the ignitionmodulemayaffect the signal’s shapeshownwhen thewaveformdisplay is selected. Inorder tocomparewaveformsbetweenseveralcylinders’ignitionmodules,theplacementofthepick-uprelativetotheignitionmoduleshouldbekeptasconsistentaspossibleforallthemeasurements.

•In someengines, the ignitionmodulesare located very close together, and in rareoccasions this could cause the instrument’s pick-up to detect signals fromnearbymodules,leadingtoinconsistentmeasurements.Thiscanusuallybesolvedbychangingtheplacementororientationofthepick-upontheignitionmodule.

7.3 Measuring ignition systems with (high voltage) spark plug wires1-Ensuretheinstrumentisturnedoff.2-InserttheSPWpick-upbarrelconnectorplugintotheflexibleprobereceptacle,firstremovingtheCOPpick-upifnecessary.

3-Turn the instrument on, and select the appropriate cycle for the engine undermeasurement.

4-Selectthedesiredmodeandview.5-Placethesparkplugwireintotheslotofthepick-up,andasfaraspossiblefromothersparkplugwirestryingtomaintainarightangle(90°)betweenthepick-upandthewire.

SparkplugwireSPWpick-up

Fig.12-UsingtheSPWpick-uponasparkplugwire

6-Iftheinstrumentisunabletodetecttheignitionsystemsignal,itmaybenecessarytorepositionthepick-upsothataconsistentsignalisdetectedanddisplayed.

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NOTES• Theabsolutesparkplugvoltagereadingwilldependonthepositionof thepick-up,theparticularcharacteristicsofthewire,etc..Thereforetheplacementofthepick-uprelativetothewireshouldbekeepasconsistentaspossibleforallthemeasurementsinordertocomparevoltagereadingsbetweenseveralcylinders’sparkplugwires.

•Sparkburntime,dwellangleandRPMmeasurementsarenotsensitivetotheexactpositionofthepick-uprelativetothesparkplugwire,butthepick-upmustbepositionedsotheinstrumentiscapableofdetectingthesignal.

• When several spark plug wires are routed or bunched close together, the capacitivepick-upmayreceivesignalsfromtwoormorewiressimultaneously,whichcouldcauseerroneousmeasurements.Inthesesituationsitisnecessarytoseparatethewireundermeasurementfromtheothers,inordertoreduceinterferenceandobtainanaccuratemeasurement.

8. RECHARGING THE INSTRUMENT1-Ifstilloperating,turntheinstrumentpoweroff.

2-Locateandlifttherubbercap(attachedtotheprotectiveholsterandlocatedbesidestheBNCconnector)torevealthemicroUSBreceptacle.

BNCConnector MicroUSBconnectorcap

Fig.13-Instrument’sconnectors

3-InserttheUSBchargercable’smicroUSBplugintothereceptacleoftheinstrumentmatchingtheorientationoftheconnectors.

4-InserttheUSBtypeAconnectorofthecableintotheUSBportofthesuppliedUSBpowerchargeradapter,andplugthepoweradapterintoanACpoweroutlet.

5-Uponstartofchargingthebattery,thedisplaywillshowthecharginginprogressiconandthescreenwillturnoffafterafewseconds.

CharginginprogressChargingcomplete

Fig.14-Chargingindicators

Page14

6-Iftheinstrumentisturnedon(bypressingthe‘POWER/CLEAR’button)atanytimewhileconnectedtothepoweradapter,theinstrumentwilldisplaythechargingstatus.

7-TheUSBtypeAconnectorcanbealsopluggedintoaUSBportofapersonalcomputer,poweredUSBhub,oranyotherUSBcompliantpowersource.

5-Therechargetimewilldependonthestateofchargeofthebattery,anditmaytakeupto6hourstofullyrechargeadepletedbattery.

NOTES• If the instrument has not beenused for a long time, or the state of charge of thebatteryhasfallentoacriticallylowlevel,aperiodofpre-conditioningofthebatteryisautomaticallyaddedtothenormalchargingcycle,whichincreasesthechargingtimeinordertorestorethebatterycapacitytoitsmaximum,Nouserinterventionisneeded,andthisprocessisautomaticallycarriedoutbytheinstrument.

• If thebattery iscompletelydepleted,pressing thepoweronbuttonwillnot turn theinstrumenton,anditmustberechargedbeforeitcanbeusedagain.

9. MAINTENANCEKeeptheinstrumentinitscarryingcasewhennotinuseanddonotsubjectittodampnessorsevereheatorcold.Donotusetheinstrumentintherain,ifitshouldaccidentallygetwet,dryitoffwithacleanpapertowelbeforestoringitaway.

Protecttheunitfromcontactwithanysolvents.Nevercleanwithasolventorpetroleumbasedmediumsuchasgasoline,as thesechemicalsmayattack theplasticpartsandcausepermanentdamage.Neveruseanabrasivecleaner.Cleaningshouldbelimitedtowipingwithacleandamppapertowelandasmallamountofsoapifrequired.Drytheunitthoroughlyafteranycleaning.

Theunit is a sealed instrument, andcontainsnouser serviceableparts.Opening thisinstrumentwillvoidthewarranty.

10. WARRANTY

Thisinstrumentcarriesaone(1)yearwarranty(fromthedateofpurchasebytheoriginalowner)againstdefectsofmaterialorworkmanship.FordetailsseeourStandardWarrantyInformationonourwebpageatwww.gtc.caor,requestaprintedcopy.

Part#GTC505MN1602EN

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