Fluke 35040 Interface Connector Cleaning, Cleaning The Instrument, Replaceable Parts Information

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35040

Operators Manual

NOTE

If fuses continue to fail - return the instrument for repair.

4.7 Interface Connector Cleaning

WARNING

Select 0.0 V bias setting AND turn off the Model 35040 Therapy Dosimeter prior to cleaning the interface connectors. Failure to do so may result in an electrical shock.

The presence of dust or lint at the interface connectors can produce leakage currents that may have a detrimental affect upon the accuracy of radiation measurements.

The ends of the interface cable may pick up dust and lint as the cable touches the floor during packing and unpacking. Dirt may later be transferred to the interface connectors located on the Model 35040 Therapy Dosimeter during mating with the interface cable.

In some cases, the offending foreign matter may be removed by gently blowing across the connector with dry air. Air containing moisture or other contaminants should be avoided. A suitable source of dry air is available where camera accessories are sold. They are intended for use in cleaning fine and delicate camera equipment. If this cleaning method fails to produce satisfactory results, then service will be required.

A procedure for troubleshooting excessive leakage is given earlier in this section.

4.8 Cleaning The Instrument

To clean the exterior of the instrument, follow these steps:

1.Turn off the instrument and disconnect all input connectors.

2.Place the caps on both triax connectors.

3.Moisten a soft cleaning cloth with a solution of three parts water and one part liquid dishwashing detergent.

Do not soak the cloth in the solution; you must not let the solution drip inside the instrument.

4.Use the moistened cloth to wipe the instrument’s exterior cover.

5.Let the instrument dry completely before using.

4.9 Replaceable Parts Information

Fluke Biomedical maintains a complete inventory of all normal replaceable parts (see Table 4-1). To place an order, or to obtain information concerning replaceable parts, contact Fluke Biomedical at 440.248.9300.

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Contents 35040 Therapy DosimeterFluke Biomedical Table of Contents Sample Customization Reports Troubleshooting and ServiceAddendum Features of Firmware Version 27JAN00 or Later Iii Blank Introduction FeaturesIntroduction Operators Manual Before You Start Safety PrecautionsSafety Symbols And Terms Specifications Factory Calibration Error Source ± %rdgMaximum Error Manual AddendaFull Scale Range Display Resolution Noise ± counts Full Scale Range Display ResolutionTimed Charge Measurements Current MeasurementsGeneral Measurements SpecificationsEffective Exposure Time Measurements High Performance Power Supply and Battery Charger Unpacking and Inspection 35040 Hardware Block Diagram of the Model 35040 Therapy Dosimeter Functional DescriptionPower Supply Front PanelMicroController Serial Communications PortBasic Operating Equations ElectrometerBias Supply Multiplexer and A/D ConverterQuantity Description Units Comments QExposureQAccum QAccumprevious= time of electrometer conversion s Charge and Current MeasurementsLeakage Measurements Exposure Charge and Dose Timed Charge and DoseSetting Thresholds Predicted Timed Charge and DoseAccumulated Charge and Dose Exposure Current and RateExposure Time DoseRate = I a × Iccf Units/C × Adcf × RateMultiplier sMm Hg = inch Hg x Air Density Correction Factor⎝ P Standard Resolution Error Units Display Minimum MaximumSetup SetupFront Panel Familiarization IntroductionPowering The System Rear Panel FamiliarizationPower-Up Self-Test and Display Messages Ion Chamber ConnectorMaking Non-Timed Exposure Measurements Basic Measurement TechniquesGeneral Considerations 3Making Timed Exposure Measurements Timer SetupTimer Use Battery Care Using Other Ion ChambersPower Battery CareOperation Instructions Front Panel ControlsPowering Up the Model 35040 Therapy Dosimeter Operation Instructions Powering Down the Model 35040 Therapy DosimeterUsing the Test Function Button QScaleFactor=1.0000 IScaleFactor=1.0000 12. The Test Function Screen Showing the Timer Settings 5Automatic Leakage CompensationCalibrated by Keithley RMD Nov 15 6Timer Setup 17. The Test Function Screen Showing the Timer SettingsUsing the Detector Select Button Using the AIR Density ButtonUsing the Units Select Button Using the Bias Select ButtonSet 300.0 V 100% Central Electrde Pos IC Bias 300.0 V CEP Using the RESET/MEASURE Button Overranging ConditionsCondition Values Overranged Reset ErrorOverrange Conditions Reset Error With Automatic Leakage Compensation Enabled AnnunciatorsAnnunciators Annunciator ConditionMeasurement Indicators and Conditions Indicator Measurement Condition? left of value Condition Overranged MeasurementInstalling/Uninstalling Customization Software CustomizationConnection to the Computer Starting the Customization SoftwareCOM Port Drop Down List DownloadingMenu Items and Controls File Save AS and File Print Ion ChambersClose or File Close Edit OK and Cancel Special ItemsDownload and Cancel 36. The Special Items Menu Calibration Temperature has focusMeasurement Displays Operators Manual Available Display Lines Display LineUsing the APPEND, DELETE, and Insert Buttons Display Line Group SelectionSelecting an Item and Placing It Changing a Line on a DisplayTimer Intervals 38. The Timer Intervals FormBias Settings 39. The Bias Settings FormExamples Changing the Pressure Units Customizing a Measurement DisplayAppending a Display Deleting a DisplayErrors Troubleshooting and Service TroubleshootingSymptom Display does not light up when Power is pressed Symptom ??Bias annunciator displayedSymptom HiBias annunciator displayed Symptom LoBias annunciator displayedSymptom Internal Reset Error displayed Symptom Configuration Error displayedBit Description Action Do not makeSymptom Current Overrange Displayed Symptom Dashes displayed instead of digitsSymptom Bias voltage measurement changes by one digit Measurements. ReturnExample 299.9 to Display Will Not Light Low Battery Hours? Is the battery voltage greater than 5.9 volts?Line Bias ErrorGo to Line Fuse Replacement Model 35040 Therapy Dosimeter Fuse ReplacementReplaceable Parts Information Interface Connector CleaningCleaning The Instrument Warranty Information Replaceable Parts ListRecalibration, Repair Information & Technical Assistance Replaceable Parts InformationBlank Sample Customization Reports Sample Documents35040 Appendix Sample Customization Reports 35040 Appendix Sample Customization Reports Blank Timed Measurements Introduction New FeaturesOverview Specifications Update Setup New Features BMaking Timed Exposure Measurements Timer Setup ProcedureTimer Use Procedure RESET/MEASURE Setup BADC ALC Automatic Leakage CompensationStart NA pA Stop Thres Current Operation Instructions BTimer Setup Decimal PlacesTable B-1. Annunciators Annunciators, Indicators, and Overrange ConditionsTable B-2. Measurement Indicators and Conditions Table B-3. Overrange Conditions Condition Overranged Measurement1Theory Of Operation Theory of OperationConfiguration Error Service Required Error Number Measurement Displays Main MenuMeasurement Menu Figure B-9 shows the Measurement Displays dialog box Table B-4. Available Display Lines Figure B-10. The Timer Intervals dialog box Page Fluke Biomedical