Fluke 90100 manual Bias Error LoBias or HiBias Indication at the Display, 35360A Tracker

Page 41

Maintenance & Service

Troubleshooting 4

Bias Error (LoBias or HiBias) Indication at the Display

WARNING

The Model 35360A TRACKER Display and 35300A Detector contain no internal operator serviceable parts. Disassembly of either unit could result in electrical shock.

Always turn the 35360A TRACKER Display's power off prior to connecting or disconnecting the interface cable.

Failure to do so may result in an electrical shock.

When powering the 35360A TRACKER Display from

an AC line, always use a 3-wire grounding type line cord such as the one supplied with the 90100 TRACKER System.

In addition, only connect the 35360A TRACKER Display to an AC power outlet employing a third wire safety ground.

Bias error annuciator is displayed on 35360A TRACKER Display's VFD.

Disconnect interface cable from 35360A TRACKER Display and recheck VFD for bias error indication.

No	Bias error annuciator displayed?	Yes
	Bias error annuciator displayed?
	(35360A TRACKER
	Display only)

Reconnect interface cable to the 35360A TRACKER Display without the 35300A Detector and recheck VFD for bias error indication.

35360A TRACKER Display's electronic bias circuit is faulty. 35360A TRACKER Display will require repair or replacement

No	Bias error annuciator displayed?	Yes
	(35360A TRACKER Display
	and interface cable)

Connect the 35300A Detector to the interface cable and recheck VFD for bias error indication.

Interface cable is faulty and will require repair or

replacement.

		Bias error
	Yes	annuciator displayed?	No
	Yes	(35360A TRACKER Display,	No
		(35360A TRACKER Display,
		35300A Detector, and
		interface cable)

The 35300A Detector is faulty and will require repair or replacement.

The bias error has disappeared. Repeat the troubleshooting procedure if the error indication returns.

Figure 4-3. Bias Error Flowchart

4-5

Image 41

Contents Tracker System ModelFluke Biomedical Table of Contents Appendix a Using Build-Up Maintenance and ServiceTheory of Operation CustomizationIntroduction General InformationModel FeaturesSafety Terms Before You Start Safety PrecautionsSpecifications Manual AddendaMechanical Specifications Nominal Ion Chamber CharacteristicsRecommended Operation Conditions Ion Chamber Factory CalibrationDisplay Mode Measurements ModeModel 35360A Tracker Display Electrometer / A-D ConverterUnpacking and Inspection High Performance Battery ChargerInterface Cable Detector to Display EnvironmentOptional Equipment Standard System ContentsBlank Rear Panel Familiarization OperationDetector Input Powering the SystemDisplay. Be sure to use the correct end of the cable 3 RS-232 Computer Interface RJ-45 Style Positioning the Model 35300A Detector in the BeamOperation Positioning the Model 353300A Detector in the Beam Front Panel Controls Operation InstructionsReset PowerTest/Detector Units SelectUsing the TEST/DETECTOR Button Powering Up the Model 35360A Tracker DisplayPowering Down the Model 35360A Tracker Display Test/Detector Screen 2 Ion Chamber Calibration Factors Using the Units Select ButtonUsing the Gain Select Button Normal Mode Using the AIR Density ButtonAbsolute Measurements Using the Measure Select Button Normal ModePercent-of-Center Measurements Underranging and Overranging Conditions Battery and Bias Annunciators24. Positions of the Battery and Bias Annunciators Gain Setting ModeAborting the Fpgf Changes Saving the Fpgf ChangesBlank Theory of Operation Hardware Block Diagram of the Model 35360A Tracker Display Power Supply2 300-VOLT Electronic Bias Supply Front Panel SwitchesProcessor VFD DisplayMultiplexer and A/D Converter Serial Communications PortElectrometer Air Density Corrections Model 35300A Ion Chamber DetectorsBasic Operating Equations Basic Operating Quantities Blank Maintenance & Service Problem TroubleshootingNo Display Flowchart Low battery Yes Annuciator displayed? Low Battery Indication at the Display35360A Tracker Bias Error LoBias or HiBias Indication at the DisplayLeakage Flowchart Dose Rate Measurement Zero Problem Flowchart Line Fuse ReplacementIf fuses continue to blow return instrument for repair Replaceable Parts Information Interface Connector CleaningCleaning the Instrument Recalibration & Repair Information / Technical Assistance Replaceable Parts ListCustomization Connection to the Computer Make a Working DiskStarting the Customization Software Screen FormatsDisplay Customization Items Screen Appearance F2 Edit Item Editing F1 Help On-Line Help for using the Customization softwareF6 Print Report Printing F10 ExitDefinitions Charge Gain QG Setting the Electrometer Gains and OffsetsCurrent Gain, Current Zero IG and ADZ Ion Chamber Calibration Factor IccfElectrometer Charge Gains QG Electrometer Current Gain IGUsage Examples Changing the Power Down IntervalChanging the ION Chamber Calibration Factor Units Input Errors ErrorsBuild-Up, Peg, and Retainer Kit Options Using Build-UpNominal Number of build-up Solid Water Appendix Fluke Biomedical