Annunciators, Indicators, and Overrange Conditions | Fluke 35040

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

Image 85

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

Contents

Therapy Dosimeter 35040 Fluke 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 Addenda Full Scale Range Display Resolution Full Scale Range Display Resolution Noise ± countsTimed Charge Measurements Current Measurements Effective 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 Dosimeter Front Panel Power SupplyMicroController Serial Communications Port Electrometer Basic Operating EquationsBias Supply Multiplexer and A/D Converter QExposure Quantity Description Units CommentsQAccum QAccumprevious Leakage Measurements Charge and Current Measurements= time of electrometer conversion s Timed Charge and Dose Exposure Charge and Dose Predicted Timed Charge and Dose Setting ThresholdsAccumulated Charge and Dose Exposure Current and Rate DoseRate = 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 Error Setup SetupFront Panel Familiarization Introduction Rear Panel Familiarization Powering The System Ion Chamber Connector Power-Up Self-Test and Display Messages General Considerations Basic Measurement TechniquesMaking Non-Timed Exposure Measurements Timer Use Timer Setup3Making Timed Exposure Measurements Using Other Ion Chambers Battery Care Battery Care PowerOperation Instructions Front Panel Controls Powering 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 Settings Calibrated by Keithley RMD Nov 15 17. The Test Function Screen Showing the Timer Settings 6Timer Setup Using the AIR Density Button Using the Detector Select Button Using the Bias Select Button Using the Units Select Button Set 300.0 V 100% Central Electrde Pos IC Bias 300.0 V CEP Overranging Conditions Using the RESET/MEASURE Button Overrange Conditions Reset ErrorCondition Values Overranged Annunciators Reset Error With Automatic Leakage Compensation EnabledAnnunciators Annunciator Condition Indicator Measurement Condition Measurement Indicators and Conditions? left of value Condition Overranged Measurement Customization Installing/Uninstalling Customization SoftwareConnection to the Computer Starting the Customization Software Menu Items and Controls DownloadingCOM Port Drop Down List Close or File Close Ion ChambersFile Save AS and File Print Edit Special Items OK and Cancel 36. The Special Items Menu Calibration Temperature has focus Download and Cancel Measurement Displays Display Line Operators Manual Available Display Lines Display Line Group Selection Using the APPEND, DELETE, and Insert ButtonsSelecting an Item and Placing It Changing a Line on a Display 38. The Timer Intervals Form Timer Intervals 39. The Bias Settings Form Bias Settings Examples Customizing a Measurement Display Changing the Pressure UnitsAppending a Display Deleting a Display Errors Troubleshooting Troubleshooting and Service Symptom ??Bias annunciator displayed Symptom Display does not light up when Power is pressedSymptom HiBias annunciator displayed Symptom LoBias annunciator displayed Symptom Configuration Error displayed Symptom Internal Reset Error displayedBit Description Action Do not make Symptom Dashes displayed instead of digits Symptom Current Overrange DisplayedSymptom Bias voltage measurement changes by one digit Measurements. Return Example 299.9 to Display Will Not Light Hours? Is the battery voltage greater than 5.9 volts? Low Battery Go to Bias ErrorLine Model 35040 Therapy Dosimeter Fuse Replacement Line Fuse Replacement Cleaning The Instrument Interface Connector CleaningReplaceable Parts Information Replaceable Parts List Warranty InformationRecalibration, Repair Information & Technical Assistance Replaceable Parts Information Blank Sample Documents Sample Customization Reports 35040 Appendix Sample Customization Reports 35040 Appendix Sample Customization Reports Blank Overview Introduction New FeaturesTimed Measurements Specifications Update New Features B Setup Timer Use Procedure Timer Setup ProcedureMaking Timed Exposure Measurements Setup B RESET/MEASURE Automatic Leakage Compensation ADC ALC Operation Instructions B Start NA pA Stop Thres Current Decimal Places Timer Setup Table B-2. Measurement Indicators and Conditions Annunciators, Indicators, and Overrange ConditionsTable B-1. Annunciators Condition Overranged Measurement1 Table B-3. Overrange Conditions Theory of Operation Theory Of Operation Configuration 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