Fluke 35040 manual Before You Start Safety Precautions, Safety Symbols And Terms, Operators Manual

Page 8

35040

Operators Manual

•The ion chamber bias voltage may be set to one of 11 user-customized settings. The display indicates the polarity of the central electrode and the actual measured output voltage generated by the ion chamber bias supply.

•Highly regulated, stable, electronic ion chamber bias supply.

•The level of the internal electronic bias supply is continuously monitored. Annunciators appear on the display if an abnormal bias voltage level is detected.

•Bright, clear, multi-line alphanumeric display.

•Simplified, uncluttered control panel.

•A wide AC line input range of 100 to 240 VAC and the use of an IEC 320/C13 style receptacle provide worldwide operation by use of the proper line cord.

•The system may be operated from either AC line power source or from its internal battery. The battery will be charged from AC line power during use.

•A high performance rechargeable battery system provides 8 hours of continuous operation from a 3-hour charge. A low battery annunciator indicates when 30 minutes or less of operation remains.

•Automatic power-down after a user-specified time period, when operating from battery power.

1.3 Before You Start - Safety Precautions

The Model 35040 Therapy Dosimeter should be used only by people who are:

•Aware of and understand the limitations of the device as they relate to the measurement of radiation output

•Knowledgeable about safety procedures observed when working with radiation sources, such as therapy radiation machines

•Aware of safety precautions required to avoid possible injury when using electrical/electronic equipment

NOTE

The Model 35040 Therapy Dosimeter is NOT approved for applications where the sensor or the dosimeter is in contact with the patient.

Please take the time to read this manual carefully before operating this instrument.

1.4 Safety Symbols And Terms

The following symbols and terms are found on the instrument and used in this manual.

The symbol on the instrument indicates that the user should refer to the operating instructions located in the manual.

The symbol on the instrument shows that high voltage may be present on the terminal(s). Use standard safety precautions to avoid personal contact with these voltages.

The

WARNING

heading used in this manual explains dangers that might result in personal injury or

 

death. Always read the associated information very carefully before performing the indicated procedure.

1-2

Page 7 Page 9
Image 8
Page 7 Page 9
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
Top Page Image Contents