Teledyne 9060Z Oxygen Equipment User Manual

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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.

13.1FIRSTAPPROACH

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 centr

e 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.

13.2DETAILEDFAULTANALYSIS

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de

scribesitsuse.AskTeledyne

AnalyticalInstrumentsformoredetails.

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Teledyne 9060Z Oxygen Equipment User Manual