General-technologies TA500 SmarTach+COP : Multisystem Engine Analyser Manual de usuario descargar pdf (Pagina 5)

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4-Select the measurement to show in the main display: RPM, spark burn time or

sparkKVolt.

5-Selectthemodeforthesecondarydisplay:MinimumandMaximumofthemaindisplay

orthecomplementarymeasurements.

6-Placethecapacitivepick-up(yellowtipoftheprobe),asshowninFig.4below,over

oneoftheignitionmodules,searchingforthepositionthatproducesastableRPMor

sparkburntimereading.

7-Ifthisistherstmeasurementtakenintheengine,thenproceedtocalibratethespark

KVoltmeasurementrst(followingtheprocedurein‘3.3.4MainFunction/Calibrate

button‘),asthiscalibrationvaluewillbeusedasareferencevaluetocomparethe

sparkKVoltreadingbetweenallthecoilonplugorcoilnearplugmodules.

8-Placethecapacitivepick-upovertheignitionmodulesandreadthemeasurements

inthedisplay.

Fig.4-Capacitivepickuponcoilonplugmodule

CoilonPlugmodule

Capacitivepickup

Important:

•Insomeengines,theignitionmodulesarelocatedveryclosetogether,andthismay

causetheTA500’scapacitivepick-uptoreceivesignalsfromnearbymodules,which

maycausefalsereadings.

•Toreduceinterferencefromothersignitionmodules,covercompletelythenearby

ignitionsmoduleswithpiecesofaluminumfoil,makingsurethealuminumfoilis

connectedtoagoodelectricalgroundintheengine(e.g.valvescover,mounting

bolts).

CAUTION

To avoid personal injuries and damage to the instrument carefully inspect the

spark plug wires, distributor cap, ignition coil , ignition module, and all other

ignition system parts for damage or leaks, and avoid using this instrument in

case any damage or leaks are found. Never touch the capacitive pick-up or

exible probe during a test

.  Wear insulating gloves when working around high

voltage, and hot parts, and keep away from moving parts (fan, drive belts, etc)

and hot objects (exhaust manifold and pipes, mufer, catalytic converter, etc.)

Nearby ignition coils shielded

withaluminumfoil

Ignitioncoilundertest

Probe

Fig.5-Avoidinginterferencebyshieldingnearbyignitioncoils

3.4 Measurement Procedures

3.4.1 TA500 measuring functions

The TA500 has specially dedicated modes for use in the diagnostics and

troubleshootingofCoilonPlugandCoilnearPlugignitiontechnology,andforsystems

usingsparkplugwires.Thesespecialmodescompensatesfordifferencesinsignalstrength

andwaveformpatternsbetweenignitionsystems.

TheTA500canmeasurethefollowing:

•EngineRPM,

•Sparkburntime,and

•SparkKVolt(relativemeasurement).

3.4.1.1 Engine RPM

Measures engine RPM in 2, 4 cycles and DIS engines, and it can be used in

combinationwithsparkburntimeandsparkKVoltmeasurements,toevaluatetheignitionsystem

performanceatdifferentenginespeeds.

3.4.1.2 Spark burn (ring) time

Thesparkburntime,alsocalled“ringtime”,isthemeasurementofthetimeperiodfrom

themomentthatasparkisinitiateduptothepointwhenitisextinguished,andisthemost

indicativemeasurementofperformanceoftheignitionsystem.Abnormallylongorshort

burntimesmayindicatesomeproblemintheignitionmodule,sparkplug,fuelmixture,

cylindercompression,etc.

3.4.1.2 Spark KVolt

SparkKVoltvaluesarerelativemeasurements,usefultocomparetheperformanceofthe

ignitionsystemineachcylinder.ComparingsparkKVoltbetweencylindersmaybeused

todiagnosecommonproblemslikemisres,brokensparkplugwires,etc.Howeverspark

KVoltvaluesmayvarywidely,arelessconsistentandnotalwaysindicativeofaproperly

workingignitionsystem.

3.4.2 Measuring Coil on Plug and Coil near Plug ignition systems

1-Turntheinstrumenton.

2-IfnotalreadyinCOPmode,selectitbypressingthe‘Ignition System’ button.

3-Selectthenumberofcyclesfortheengineundermeasurementbypressingthe

‘Engine

Cycles’buttonrepeatedlyuntilthedisplayshowsthecorrectsetting.

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