Owner's manual

<8 TROUBLESHOOTING> 8-4
IM 11Y01B02-01E-A 4th Edition September 11, 2012-00
Yokogawa
Process Temperature out of range. The gas temperature
range for the application is programmed into the analyzer.
Check temperature transducer feed to analyzer from the
heat trace controller
Checktoensuresoftwaresetting(AdvancedMenu,Con-
gure)iscorrect
If operating outside of temperature range, a re-calibration
mayberequired–contactYokogawa
Concentration out of range. The process pressure range for
the application is programmed into the analyzer.
Checktoensuresoftwaresetting(AdvancedMenu,Con-
gure)iscorrect
L or D unit temp out of range.TheControllerUnithastwo
builtintemperaturesensors(backplaneanddetectboard).
This diagnostic is triggered if they sense the ambient tem-
peratureisoutsideoftheanalyzerdesignrange(-10to50C)–
causing the internal temperatures to exceed the preset limit
Checkpurgesystemowsandexcessiveheatoutputfrom
SBCand/orotherelectroniccomponents
Look for excessive heat output from adjacent processes
and/orradiantprocessand/ordirectsunlight
8.3 Analyzer Faults
ForanalyzerfaultsitisrecommendedthatyoucontactYokogawaLaserAnalysisDivisionimmediately.
Thereistypicallynouserinterventionthatshouldbeattemptedunlessspecicallydiagnosedor
directed by Yokogawa.
Yokogawa Laser Analysis Division personnel will step you through diagnostic and repair steps.
Laser Temperature Out of Range. This is an indication that the system can not control the laser
temperature, resulting in wavelength instability of the laser.
Detector Signal High.Detectorissaturated(i.e.toomuchdetectorsignalgain)orhasbeendamaged.
Detector Signal Lost.Theanalyzerisnotreceivingadetectorsignal–pleasecheckallelectrical
connections and follow the procedure for Troubleshooting Low or Lost Transmission.
Outlier Rejection.Futurefeature–yettobeimplemented.
Peak Center Out of Range. Indication that the system can not keep the peak centered in the scan
range.Pleasereviewtheabsorptionspectratochecktheactualpeakposition,checkthatsometarget
gasintheopticalpath–capturespectraandsendtoYokogawaLaserAnalysisDivisionorlocalagent
for further assistance.