Fluke 35040 manual Annunciators, Indicators, and Overrange Conditions, Table B-1. Annunciators

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Appendix

Operation Instructions B

B.4.6 Annunciators, Indicators, and Overrange Conditions

Table B-1 specifies the annunciators that may appear on the top line of the display.

Table B-1. Annunciators

	Annunciator	Condition

	??Bias	No bias measurement possible since the
	??Bias	electrometer is not ready
		electrometer is not ready
	ADC	Air density correction in use (only applicable to
	ADC	radiological measurements)
		radiological measurements)
	ALC	Automatic leakage compensation enabled

	LoBat	Low Battery voltage

	LoBias	Low Bias voltage

	HiBias	High Bias voltage

	OvAmps	Overranged current

	Rst	Resetting electrometer

	Tmr	Timer in use

	WAIT Bias Not Ready	The dosimeter is setting the bias

	WAIT System Not Rdy	The dosimeter is resetting the electrometer
		(only applicable when automatic leakage
		compensation is enabled)

Figure B-8 illustrates the locations of some annunciators. The battery, bias, and overranged current annunciators appear at the same location, and the instrument alternates the displaying of each annunciator when more than one is applicable.

ADC LoBias Tmr ALC 39.995 nC

659.8 pA

59.891 s

Figure B-8. Annunciator Positions

Table B-2 lists the indicators the instrument uses to signal that a measurement quantity has not been compensated for leakage or is not available due to the specified condition.

Table B-2. Measurement Indicators and Conditions

Indicator	Measurement	Condition

? (left of value)	All Non-leakage1	Automatic leakage compensation is enabled, but the exposure
		started before a leakage measurement was available.
-.---	Leakage	Automatic leakage compensation is enabled, but the exposure
		started before a leakage measurement was available.
INVALID	Effective Time	The calculated effective time is longer than the actual
		exposure. This condition occurs when a large amount of
		charge is injected at the beginning of the exposure.
NA	Leakage	The leakage measurement is not available since automatic
		leakage compensation is disabled.
OVER	Non-leakage1	The quantity or one of its dependents has exceeded the
		maximum value. Refer to Table B-3 for more information.

1All non-leakage measurements (e.g., charge, current, dose, rate, effective time, etc.)

B-9

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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