Fluke 90100 manual Leakage Flowchart

Page 42

Model 90100

Operators Manual

Dose Measurement Value Drifts Prior to (or following) the Exposure

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.

One or more dose measurement values exhibits a drift rate of greater than two counts per minute in the absence of

radiation.

Disconnect interface cable from 35360A TRACKER Display and recheck dose drift.

No

Excessive dose drift?

Yes

 

(35360A TRACKER

 

 

Display only)

 

Reconnect interface cable to the 35360A

TRACKER Display without the 35300A

Detector and recheck the dose drift.

Yes

Excessive dose drift?

No

(35360A TRACKER Display

 

 

 

+ interface cable)

 

Clean interface cable connectors via procudure given later in this section and recheck dose drift.

 

Yes

Excessive dose drift?

No

 

 

 

(35360A TRACKER Display

 

 

 

+ interface cable)

 

 

 

 

 

 

 

 

 

Attempt to clean interface cable

 

 

Connect the 35300A Detector to the

 

connectors was unsuccessful. Cable

 

interface cable and recheck complete

 

will require repair or replacement.

 

 

 

 

system leakage.

 

 

 

 

 

 

 

 

 

 

Yes

 

Excessive dose drift?

No

 

 

 

 

(35360A TRACKER Display,

35300A Detector, and interface cable)

Clean 35360A TRACKER Display's interface connector via procedure given later in this section and recheck dose drift.

No

Excessive dose drift?

Yes

 

(35360A TRACKER

 

 

Display only)

 

Attempt to clean 35360A TRACKER Display's interface connector was unsuccessful. 35360A TRACKER Display will require repair or replacement.

Clean 35300A Detector's interface conncector via procedure given later in this section and recheck dose drift.

The drift problem has been eliminated and the system is ready

for use.

Yes

Excessive dose drift?

No

(35360A TRACKER Display,

 

 

 

35300A Detector and

 

 

interface cable)

 

Attempt to clean the 35300A Detectors's interface connectors was unsuccessful.

35300A Detector will require repair or replacement.

The drift problem has been eliminated and the system is ready

for use.

Figure 4-4. Leakage Flowchart

4-6

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Contents Model Tracker SystemFluke Biomedical Table of Contents Theory of Operation Maintenance and ServiceAppendix a Using Build-Up CustomizationGeneral Information IntroductionFeatures ModelSpecifications Before You Start Safety PrecautionsSafety Terms Manual AddendaRecommended Operation Conditions Nominal Ion Chamber CharacteristicsMechanical Specifications Ion Chamber Factory CalibrationModel 35360A Tracker Display Measurements ModeDisplay Mode Electrometer / A-D ConverterInterface Cable Detector to Display High Performance Battery ChargerUnpacking and Inspection EnvironmentStandard System Contents Optional EquipmentBlank Operation Rear Panel FamiliarizationPowering the System Detector InputDisplay. Be sure to use the correct end of the cable Positioning the Model 35300A Detector in the Beam 3 RS-232 Computer Interface RJ-45 StyleOperation Positioning the Model 353300A Detector in the Beam Operation Instructions Front Panel ControlsTest/Detector PowerReset Units SelectPowering Up the Model 35360A Tracker Display Powering Down the Model 35360A Tracker DisplayUsing the TEST/DETECTOR Button Using the Units Select Button Test/Detector Screen 2 Ion Chamber Calibration FactorsUsing the AIR Density Button Using the Gain Select Button Normal ModeUsing the Measure Select Button Normal Mode Absolute MeasurementsPercent-of-Center Measurements Battery and Bias Annunciators Underranging and Overranging ConditionsGain Setting Mode 24. Positions of the Battery and Bias AnnunciatorsSaving the Fpgf Changes Aborting the Fpgf ChangesBlank Theory of Operation Power Supply Hardware Block Diagram of the Model 35360A Tracker DisplayProcessor Front Panel Switches2 300-VOLT Electronic Bias Supply VFD DisplaySerial Communications Port ElectrometerMultiplexer and A/D Converter Model 35300A Ion Chamber Detectors Air Density CorrectionsBasic Operating Equations Basic Operating Quantities Blank Maintenance & Service Troubleshooting ProblemNo Display Flowchart Low Battery Indication at the Display Low battery Yes Annuciator displayed?Bias Error LoBias or HiBias Indication at the Display 35360A TrackerLeakage Flowchart Line Fuse Replacement Dose Rate Measurement Zero Problem FlowchartIf fuses continue to blow return instrument for repair Interface Connector Cleaning Cleaning the InstrumentReplaceable Parts Information Replaceable Parts List Recalibration & Repair Information / Technical AssistanceCustomization Starting the Customization Software Make a Working DiskConnection to the Computer Screen FormatsDisplay Customization Items Screen Appearance F6 Print Report Printing F1 Help On-Line Help for using the Customization softwareF2 Edit Item Editing F10 ExitDefinitions Current Gain, Current Zero IG and ADZ Setting the Electrometer Gains and OffsetsCharge Gain QG Ion Chamber Calibration Factor IccfElectrometer Current Gain IG Electrometer Charge Gains QGChanging the Power Down Interval Usage ExamplesChanging the ION Chamber Calibration Factor Units Errors Input ErrorsUsing Build-Up Build-Up, Peg, and Retainer Kit OptionsNominal Number of build-up Solid Water Appendix Fluke Biomedical
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