General-technologies TA500 SmarTach+COP : Multisystem Engine Analyser Manual de usuario descargar pdf (Pagina 6)

3.5 Additional functions

3.5.1 Minimum and Maximum functions (For COP and SPW modes)

TheTA500maintainsacontinuousrecordoftheminimumandmaximumreadingsofthe

functioncurrentlyselected.

1-TodisplaytheMinimumandMaximumreadings of themaindisplay, if notalready

selectedpress‘Secondary Function / Capture’ buttonmomentarily.

2-ToresettheMinimumandMaximumreadings,pressthe‘Power On/Off / Reset’ button

momentarily.Thesevaluesarealsoresetwhenturningtheuniton.

Note:

•For the tachometer function (RPM) all Minimum and Maximum readings on the

secondarydisplaysareshownwiththelastdigitroundedto“0”.

3.5.2 Spark KVolt calibration function (For COP mode only)

The TA500 requires the user to calibrate the instrument in order to measure spark

KVolt in Coil on Plug and Coil near Plug ignition systems. This calibration uses the

measurement values obtained during the procedure to find the optimal measuring

parametersor a particulartype ofignition module, andcompensates for differences in

waveformandsignalstrength.

• Once the TA500 has been calibrated on one of the ignition modules of the engine

beingdiagnosed,allthesubsequentmeasurementofsparkKVoltwillberelativetothe

calibrationvalue.

• TocalibratetheTA500,followtheprocedureasdescribedin‘3.4.2MeasuringCoilon

PlugandCoilnearPlugignitionsystems’.

Page9

3.4.2 Spark plug wire ignition systems

1-Turntheinstrumenton.

2-Ifnotalreadyin

SPW(SparkPlugWire)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.

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pickupoveroneofthesparkplugwires,andproceedtoreadthe

measurementonthedisplay.

Sparkplugwire

Capacitivepick-upat90°

Capacitivepick-upparallel

Fig.6-Capacitivepick-uponsparkplugwire

Page10

Important:

• InordertoobtainconsistentresultswhenmeasuringSparkKVoltonsparkplugwires,

thepositionofthecapacitivepick-uprelativetothesparkplugwireshouldbethe

sameforeverymeasurement.

•An easy way to obtain consistent measurements, is to position the capacitive

pick-upeitherat90°orparalleltothesparkplugwire(Fig5),andthenrepeatthe

samepositioningforeverysparkplugwire

•SparkburntimeandRPMmeasurementsarenotsensitivetotheexactpositionof

thecapacitivepick-uprelativetothesparkplugwire,butithastobeplacedsothe

instrumentiscapableofdetectingthesignal.

•When several spark plug wires are routed or bunched close together, the

capacitive pick-up may receive  signals  from  several wires at the same time,

which could cause erroneous measurements. In these situations it may be

necessarytoseparatethewireundermeasurementfromtheothers,inordertoreduce

interferenceandobtainanaccuratemeasurement.

Notes:

• Immediatelyaftercalibration,theTA500willdisplayabaselinevalueof“10.0Spark

KVolt” by default.All the spark KVolt measurements obtained thereafter would be

relativestothe(value)moduleusedforcalibration.

•CalibrationdoesnothaveanyeffectonsparkburntimeorRPMmeasuredvalues

(theseareabsolute).

•IftheTA500is calibratedagain, theSpark KVoltvalues obtainedbefore andafter

calibrationmaynotbecomparable.

•If not calibrated, the TA500 may show a false ‘0.0 Spark KVolt’ reading when

measuringsparkKVoltonCoilonPlugandCoilnearPlugsystems.

Fig.7-Displayduringcalibration

Burn Time

Cycles

Peak

Flashingletters

1 2 3 4 5 6 7 8 9

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