Teledyne 9060Z 13.TROUBLESHOOTING

Model9060ZManual

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53

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13.TROUBLESHOOTING

TheTeledyneAnalyticalInstrumentsoxygentransmitterhasprovedanextremelyreliableinstrument.

Thetroubleshootingguidehereisbasedonananalysisofthepotentialproblemthatmayoccurafter

manyyearsofoperationinthefield.Acurrentlistofproblemsandsolutionscanbefoundonthe

TeledyneAnalyticalInstrumentswebsiteatwww.teledyne‐ai.comwhenanyareidentified.

Theprobewillnotheatup.

Turnthepoweroff,removeandcheck2x20mmglassfuses.Ifeitherofthemisblown,checkthe

probeheaterresistancebetweenthetwowhitewiresthatcomefromtheprobe.Itshouldbe110+/‐

15ohms,andbothwiresshouldbeopencircuittoearth.Ifnot,replacetheprobe.

Isthe‘B’shownonthebottomlefthandcornerofthedisplay?Ifnot,checkthattheburnerisenabled

witheitheralinkbetweenterminals10&11,BURNERINPUT,orisenabledwithaconnectiontoa

voltage‐freecontactfromthemainfuelvalvetotheseterminals.

Thedisplayisblankandthereisnobacklighton.

MeasurethepowersupplyvoltagesatthetestpointslabeledCOMMand+5vattherighthandsideof

themainPCB1732‐1.Itshouldbe5+/‐0.15v.

Turnoffthepowerandremovethemainshield.Checkthattheplug‐infuseFS1hasnotblown.It

shouldonlybereplacedwitha1A,250vfuseifithasblown.

Isthemainspowerbeingsuppliedtoterminals36&37andisitbetween100and240VAC?Ifmaybe

necessarytoreplacetheswitchmodepowersupply,PS5,APC‐5S.

An‘ADCCalibrationFail’alarmhasoccurred.

Turnthetransmitteroffandremovethemainshield.Turnthetransmitterbackonandmeasurethe

voltagesonthe‘Acom’testpoints.Withthenegativeleadonthecentreterminaltheother2

terminalsshouldmeasure12+/‐0.3v.Ifnot,replacethesmallDC‐DCconverterPS4.

An‘Output1(2)Failure’alarmhasoccurred.

Turnthetransmitteroffandremovethemainshield.Turnthetransmitterbackonandmeasurethe

voltagesonthe‘D1com’testpoints.Withthenegativeleadonthecentreterminaltheother2

terminalsshouldmeasure12+/‐0.3v.Ifnot,replacethesmallDC‐DCconverterPS4.

A‘Heater1(2)Failure’alarmhasoccurred.

ThesoftwarehasfoundthattheSSR4hasfailed.Ifonlyoneprobeisbeingusedandyouneedtogets

thetransmitterbackworkingquickly,usetheCALIBRATIONmenufunction18,HeaterSSRSelect,to

changetheheateroutputterminals.Seechapter8.2.8,HeaterSSRfaultcorrection.

A‘BBRAMFail’alarmhasoccurred

ReplacetheBBRAM,MEM1onthe1732‐1mainPCB.

The9060Ztransmitterhasadiagnosticsmodebuiltintothesoftware.Thismodeallowsdetailed

analysisofthehardwareofthetransmitter,butdoesrequirealevelofcompetenceinelectronics.

Thediagnosticsmodeisselectablebyturningthe‘Diagnostics’DIPswitchtoONandthenturnonthe

power.ThereisaseparateDiagnosticsModeManualavailablethatdescribesitsuse.AskTeledyne

AnalyticalInstrumentsformoredetails.