Fluke 35040 manual Symptom Display does not light up when Power is pressed

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35040

Operators Manual

The decision trees of the second part are presented in text format. To use the decision tree, start with statement number 1. The text may state one or more actions to be completed followed by a question. Choose the most appropriate answer. Use the number after the answer to find the next statement.

Eventually, you will come to a statement that has an action and no question. This may refer you to another section or provide a conclusion to the problem.

When “PROBLEM”: is the first part of the action, the problem has been identified. The exact wording of the phrase should be used when reporting the problem to Fluke Biomedical’s Repair Coordinator.

Let’s walk through a likely problem. The instrument is running from the battery. The phrase “LoBat” is blinking on the top line of the display. Look through the list of symptoms for the phrase “LoBat”. The symptom-cause-action block states that the most likely cause is the battery voltage is less than 5.9 volts. Many times the information in the cause may be enough to take corrective action. In this case though, you are going to follow the suggested action. Turn to the decision tree titled Low Battery (see Section 4.4). The first statement asks if the instrument is plugged in. The instrument is not, so the answer is NO. Proceed to statement 6. Statement 6 says to plug the instrument in and asks if the current is positive. All parts of the instrument are operating normally, so the answer is YES. You proceed to statement 7. Statement 7 states that the battery is charging. Since there is no question, you are done.

Symptom:

Display does not light up when POWER is pressed.

Cause:

The battery voltage may be very low.

Action:

See Section 4.3.

Explanation: The instrument will not operate if the battery voltage is less than 5.4 volts. The battery must be slowly charged to the 5.4 volt level by plugging the instrument in for up to 24 hours.

Symptom:

“??Bias” annunciator displayed.

Cause:

Signals from the high voltage side of the instrument are not valid.

Action:

See Section 4.5.

Explanation: The electrometer has not been initialized properly or the data transfer across the high voltage isolation has been interrupted. If the bias voltage is shorted by connecting or disconnecting a cable while the bias is on, a high voltage spark may be generated which can turn off some or all of the logic on the high voltage side of the instrument.

Symptom:

“HiBias” annunciator displayed.

Cause:

Bias is higher than the selected voltage by more than 1 volt.

Action:

See Section 4.5.

Explanation: HiBias is a normal momentary indication when changing from one bias selection to the next. It should only persist for a few seconds. This display is triggered when the magnitude of the measured bias voltage exceeds the set point by more than 1 volt.

Symptom:

“LoBias” annunciator displayed.

Cause:

Bias is lower than the set point by more than 1 volt.

Action:

See Section 4.5.

Explanation: LoBias is a normal momentary indication when changing from one bias setting to the next. It should only persist for a few seconds. This display is triggered when the magnitude of the measured bias voltage is less than the set point by more than 1 volt.

Symptom:

“LoBat” annunciator displayed.

Cause:

The battery voltage is 5.9 volts or less.

Action:

See Section 4.4.

4-2

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Contents 35040 Therapy DosimeterFluke 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 Specifications Factory Calibration Error Source ± %rdgMaximum Error Manual AddendaFull Scale Range Display Resolution Noise ± counts Full Scale Range Display ResolutionTimed Charge Measurements Current MeasurementsSpecifications Effective Exposure Time MeasurementsGeneral 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 QAccumpreviousCharge and Current Measurements Leakage Measurements= time of electrometer conversion s 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 sAir Density Correction Factor ⎝ PMm Hg = inch Hg x Standard Resolution Error Units Display Minimum MaximumSetup SetupFront Panel Familiarization IntroductionPowering The System Rear Panel FamiliarizationPower-Up Self-Test and Display Messages Ion Chamber ConnectorBasic Measurement Techniques General ConsiderationsMaking Non-Timed Exposure Measurements Timer Setup Timer Use3Making Timed Exposure Measurements Battery Care Using Other Ion ChambersPower Battery CareOperation 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 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 ConditionsReset Error Overrange ConditionsCondition Values Overranged 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 SoftwareDownloading Menu Items and ControlsCOM Port Drop Down List Ion Chambers Close or File CloseFile Save AS and File Print 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?Bias Error Go toLine Line Fuse Replacement Model 35040 Therapy Dosimeter Fuse ReplacementInterface Connector Cleaning Cleaning The InstrumentReplaceable Parts Information 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 Introduction New Features OverviewTimed Measurements Specifications Update Setup New Features BTimer Setup Procedure Timer Use ProcedureMaking Timed Exposure Measurements RESET/MEASURE Setup BADC ALC Automatic Leakage CompensationStart NA pA Stop Thres Current Operation Instructions BTimer Setup Decimal PlacesAnnunciators, Indicators, and Overrange Conditions Table B-2. Measurement Indicators and ConditionsTable B-1. Annunciators Table B-3. Overrange Conditions Condition Overranged Measurement1Theory 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
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