Fluke 35040 manual Symptom Internal Reset Error displayed, Symptom Configuration Error displayed

Page 61

Troubleshooting and Service

Troubleshooting 4

Explanation: The low battery annunciator is a reminder that while running on the battery, there is a finite amount of energy available. For the battery in this instrument and the energy consumption of the instrument, when the battery voltage drops below 5.9 volts there is less than 30 minutes of operating time left.

Symptom:

“Internal Reset Error” displayed.

 

ADC

 

Internal Reset Error

 

Press RESET/MEASURE

 

and Repeat Exposure

Cause:

Start of exposure detected during reset process.

Action:

Stop the exposure. Press the RESET/MEASURE button. Wait for the “System Not RDY”

 

annunciator to extinguish. Start the exposure.

Explanation: The instrument measured a current above the start threshold while resetting the electrometer. It is assumed that the exposure was started while the reset was occurring. If the exposure did start during the reset, some unknown amount of charge was lost. The lost charge would lead to an incorrect reading.

Symptom:

“Configuration Error” displayed.

ADC

Configuration Error

Service Required

Error Number : 16

Cause:

The instrument has lost the calibration or customization data.

Action:

Convert the configuration error number to a binary value using a program such as the

 

Windows® Calculator and use the table below to determine the extent of the problem.

 

For example, a configuration error of “18” corresponds to a binary value of “10010” (bits 5

 

and 2 set), which indicates that the customization for both the ion chamber and settings

 

are invalid.

 

 

 

 

 

 

 

 

 

Bit

Description

Action

 

 

 

 

 

 

 

1

Operator settings are

Select the proper settings

 

 

invalid.

from the front panel.

 

 

 

 

 

2

Customization settings are

Reinstall settings using the

 

 

invalid.

Customization software.

 

 

 

 

 

 

Electrometer calibration

Do NOT make

 

 

3

settings are invalid.

measurements. Return

 

 

 

 

instrument for repair.

 

 

 

Bias calibration settings are

Do NOT make

 

 

4

invalid.

measurements. Return

 

 

 

 

instrument for repair.

 

 

5

Ion chamber customization

Reinstall ion chambers using

 

 

settings are invalid.

the Customization software.

 

 

 

 

 

6

Ion chambers cannot be

Return instrument for repair

 

 

read.

to correct problem.

 

 

 

 

4-3

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Contents Therapy Dosimeter 35040Fluke Biomedical Table of Contents Addendum Features of Firmware Version 27JAN00 or Later Troubleshooting and ServiceSample Customization Reports Iii Blank Introduction FeaturesIntroduction Safety Symbols And Terms Before You Start Safety PrecautionsOperators Manual Factory Calibration Error Source ± %rdg SpecificationsMaximum Error Manual AddendaFull Scale Range Display Resolution Full Scale Range Display Resolution Noise ± countsTimed Charge Measurements Current MeasurementsEffective Exposure Time Measurements SpecificationsGeneral 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 QAccumpreviousLeakage Measurements Charge and Current 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 Time⎝ P Air Density Correction FactorMm 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 MessagesGeneral Considerations Basic Measurement TechniquesMaking Non-Timed Exposure Measurements Timer Use Timer Setup3Making Timed Exposure Measurements Using Other Ion Chambers Battery CareBattery Care PowerOperation Instructions Front Panel ControlsPowering Up the Model 35040 Therapy Dosimeter Using the Test Function Button Powering Down the Model 35040 Therapy DosimeterOperation 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 ButtonOverrange Conditions Reset ErrorCondition 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 SoftwareMenu Items and Controls DownloadingCOM Port Drop Down List Close or File Close Ion ChambersFile 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 BatteryGo to Bias ErrorLine Model 35040 Therapy Dosimeter Fuse Replacement Line Fuse ReplacementCleaning The Instrument Interface Connector CleaningReplaceable 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 Overview Introduction New FeaturesTimed Measurements Specifications Update New Features B SetupTimer Use Procedure Timer Setup ProcedureMaking Timed Exposure Measurements Setup B RESET/MEASUREAutomatic Leakage Compensation ADC ALCOperation Instructions B Start NA pA Stop Thres CurrentDecimal Places Timer SetupTable B-2. Measurement Indicators and Conditions Annunciators, Indicators, and Overrange ConditionsTable B-1. Annunciators Condition Overranged Measurement1 Table B-3. Overrange ConditionsTheory of Operation Theory Of OperationConfiguration Error Service Required Error Number Measurement Menu Main 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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