Fluke manual Powering Down the Model 35040 Therapy Dosimeter, Using the Test Function Button

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Operation

Operation Instructions 3

NOTE

When attempting to turn the instrument on, firmly press the POWER button and hold for approximately one second. Always allow several seconds between retries.

During this self-test period, the Model 35040 Therapy Dosimeter displays a sequence of screens. The first screen to appear after pressing the POWER button is the Pixel Test screen shown in Figure 3-6.

Figure 3-6. The Pixel Test Screen

The pixel test screen remains visible for two to ten seconds depending on the number of ion chamber calibration factors in the instrument. It will be followed by the Calibration Identification screen shown in Figure 3-11. After an additional two seconds, the display will change to the General Information Screen shown in Figure 3-7. After two more seconds, the display will advance to the Bias and Battery Voltage Test Screen shown in Figure 3-8. The bias voltage will take a few seconds to reach a stable value. When the bias voltage is stable, the instrument is ready for use. While measurements may be made immediately, the specified warm up time must elapse before specified accuracy is warranted.

3.9.3 Powering Down the Model 35040 Therapy Dosimeter

Pressing the POWER button turns the instrument off. As part of the power down sequence, the Model 35040 Therapy Dosimeter saves all of its front panel settings and is thus able to restore these settings during the next power up sequence.

3.9.4 Using the TEST FUNCTION Button

Press the TEST FUNCTION button to display the Test Function screens, see Figure 3-7 to 3-11. Use the UP and DOWN buttons to cycle through the Test Function screens. These screens contain information about the instrument’s calibration, the calibration scale factors, firmware revision date, serial number, leakage current, bias and battery condition, and optional text lines.

The top line of the display, shown in Figure 3-7, has annunciators for air density correction applied (ADC), bias status (LoBias or HiBias), and battery status (LoBat). The firmware revision date, on the second line, indicates the revision level of the controlling program in the instrument. The two optional text lines can be customized using the Customization software.

ADC

FW Rev: 10JUN93 A

*Optional Text Line1

*Optional Text Line2

Figure 3-7. The Test Function Screen 1 - General Information

3-9

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Contents Therapy Dosimeter 35040Fluke Biomedical Table of Contents Troubleshooting and Service Addendum Features of Firmware Version 27JAN00 or LaterSample Customization Reports Iii Blank Features IntroductionIntroduction Before You Start Safety Precautions Safety Symbols And TermsOperators Manual Factory Calibration Error Source ± %rdg SpecificationsMaximum Error Manual AddendaFull Scale Range Display Resolution Full Scale Range Display Resolution Noise ± countsTimed Charge Measurements Current MeasurementsSpecifications Effective Exposure Time MeasurementsGeneral Measurements High Performance Power Supply and Battery Charger Unpacking and Inspection 35040 Functional Description Hardware Block Diagram of the Model 35040 Therapy DosimeterFront Panel Power SupplyMicroController Serial Communications PortElectrometer Basic Operating EquationsBias Supply Multiplexer and A/D ConverterQExposure Quantity Description Units CommentsQAccum QAccumpreviousCharge and Current Measurements Leakage Measurements= time of electrometer conversion s Timed Charge and Dose Exposure Charge and DosePredicted Timed Charge and Dose Setting ThresholdsAccumulated Charge and Dose Exposure Current and RateDoseRate = I a × Iccf Units/C × Adcf × RateMultiplier s Exposure TimeAir Density Correction Factor ⎝ PMm Hg = inch Hg x Units Display Minimum Maximum Standard Resolution ErrorSetup SetupFront Panel Familiarization IntroductionRear Panel Familiarization Powering The SystemIon Chamber Connector Power-Up Self-Test and Display MessagesBasic Measurement Techniques General ConsiderationsMaking Non-Timed Exposure Measurements Timer Setup Timer Use3Making Timed Exposure Measurements Using Other Ion Chambers Battery CareBattery Care PowerOperation Instructions Front Panel ControlsPowering Up the Model 35040 Therapy Dosimeter Powering Down the Model 35040 Therapy Dosimeter Using the Test Function ButtonOperation Instructions QScaleFactor=1.0000 IScaleFactor=1.0000 5Automatic Leakage Compensation 12. The Test Function Screen Showing the Timer SettingsCalibrated by Keithley RMD Nov 15 17. The Test Function Screen Showing the Timer Settings 6Timer SetupUsing the AIR Density Button Using the Detector Select ButtonUsing the Bias Select Button Using the Units Select ButtonSet 300.0 V 100% Central Electrde Pos IC Bias 300.0 V CEP Overranging Conditions Using the RESET/MEASURE ButtonReset Error Overrange ConditionsCondition Values Overranged Annunciators Reset Error With Automatic Leakage Compensation EnabledAnnunciators Annunciator ConditionIndicator Measurement Condition Measurement Indicators and Conditions? left of value Condition Overranged MeasurementCustomization Installing/Uninstalling Customization SoftwareConnection to the Computer Starting the Customization SoftwareDownloading Menu Items and ControlsCOM Port Drop Down List Ion Chambers Close or File CloseFile Save AS and File Print Edit Special Items OK and Cancel36. The Special Items Menu Calibration Temperature has focus Download and CancelMeasurement Displays Display Line Operators Manual Available Display LinesDisplay Line Group Selection Using the APPEND, DELETE, and Insert ButtonsSelecting an Item and Placing It Changing a Line on a Display38. The Timer Intervals Form Timer Intervals39. The Bias Settings Form Bias SettingsExamples Customizing a Measurement Display Changing the Pressure UnitsAppending a Display Deleting a DisplayErrors Troubleshooting Troubleshooting and ServiceSymptom ??Bias annunciator displayed Symptom Display does not light up when Power is pressedSymptom HiBias annunciator displayed Symptom LoBias annunciator displayedSymptom Configuration Error displayed Symptom Internal Reset Error displayedBit Description Action Do not makeSymptom Dashes displayed instead of digits Symptom Current Overrange DisplayedSymptom Bias voltage measurement changes by one digit Measurements. ReturnExample 299.9 to Display Will Not Light Hours? Is the battery voltage greater than 5.9 volts? Low BatteryBias Error Go toLine Model 35040 Therapy Dosimeter Fuse Replacement Line Fuse ReplacementInterface Connector Cleaning Cleaning The InstrumentReplaceable Parts Information Replaceable Parts List Warranty InformationRecalibration, Repair Information & Technical Assistance Replaceable Parts InformationBlank Sample Documents Sample Customization Reports35040 Appendix Sample Customization Reports 35040 Appendix Sample Customization Reports Blank Introduction New Features OverviewTimed Measurements Specifications Update New Features B SetupTimer Setup Procedure Timer Use ProcedureMaking Timed Exposure Measurements Setup B RESET/MEASUREAutomatic Leakage Compensation ADC ALCOperation Instructions B Start NA pA Stop Thres CurrentDecimal Places Timer SetupAnnunciators, Indicators, and Overrange Conditions Table B-2. Measurement Indicators and ConditionsTable B-1. Annunciators Condition Overranged Measurement1 Table B-3. Overrange ConditionsTheory of Operation Theory Of OperationConfiguration Error Service Required Error Number Main Menu Measurement MenuMeasurement Displays 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