Fluke 90100 manual Basic Operating Quantities

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				Theory of Operation	3
				Basic Operating Quantities	3
3.6 Basic Operating Quantities
Table 3-3. Basic Operation Quantities

	Quantity	Description	Units	Comments

				Electrical current delivered to readout in
	I	Current	nC/Min	response to radiation incident upon
				detector.
				Electrical charge delivered to readout in
	Q	Charge	nC	response to radiation incident upon
				detector.
				Electrometer output level returned by
	ADC	A-D Counts	Counts	A-D Converter during dose or dose rate
	ADC	A-D Counts	Counts	measurement.
				measurement.
				Electrometer output level returned by
				A-D Converter while operating in the
				dose rate measurement mode and in
	ADZ	A-D Zero	Counts	the absence of radiation. A-D Zero
	ADZ	A-D Zero	Counts	levels are field programmable via
				levels are field programmable via
				Customization Software.
				Overall electrical charge gain of the
				electrometer / A-D combination when
				measuring in the dose mode. Charge
	QG	Charge Gain	nC / Count	gain values are field programmable via
				Customization Software.
				Overall electrical current gain of the
				electrometer and A-D combination
				when measuring in the dose rate mode.
	IG	Current Gain	(nC/Min) / Count	Current gain values are field
	IG	Current Gain	(nC/Min) / Count	programmable via Customization
				programmable via Customization
				Software.
				Specific R/nC values are supplied by
		Ion Chamber	Ion Chamber	factory for each of the five ion chamber
		Ion Chamber	Ion Chamber	channels. Values are field
	ICCF	Calibration	Calibration Units	channels. Values are field
	ICCF	Calibration	Calibration Units	programmable via Customization
		Factor	/ nC	programmable via Customization
		Factor	/ nC	Software.
				Software.
	DUCF	Display Units	Display Units	Factory default of 0.879 rad/R is
	DUCF	Conversion	/ Radiation Calibration	supplied. Value is field programmable
		Factor	Units	via Customization Software.
		Air Density		Calculated by instrument and depends
	ADCF	Correction	None	on front panel Temperature and
		Factor		Pressure settings.
	FPGF	Front Panel	None	User specified via front panel gain
	FPGF	Gain Factor	None	setting.
		Gain Factor		setting.

3-7

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Contents Tracker System ModelFluke Biomedical Table of Contents Customization Maintenance and ServiceAppendix a Using Build-Up Theory of OperationIntroduction General InformationModel FeaturesManual Addenda Before You Start Safety PrecautionsSafety Terms SpecificationsIon Chamber Factory Calibration Nominal Ion Chamber CharacteristicsMechanical Specifications Recommended Operation ConditionsElectrometer / A-D Converter Measurements ModeDisplay Mode Model 35360A Tracker DisplayEnvironment High Performance Battery ChargerUnpacking and Inspection Interface Cable Detector to DisplayOptional Equipment Standard System ContentsBlank Rear Panel Familiarization OperationDetector Input Powering the SystemDisplay. Be sure to use the correct end of the cable 3 RS-232 Computer Interface RJ-45 Style Positioning the Model 35300A Detector in the BeamOperation Positioning the Model 353300A Detector in the Beam Front Panel Controls Operation InstructionsUnits Select PowerReset Test/DetectorUsing the TEST/DETECTOR Button Powering Up the Model 35360A Tracker DisplayPowering Down the Model 35360A Tracker Display Test/Detector Screen 2 Ion Chamber Calibration Factors Using the Units Select ButtonUsing the Gain Select Button Normal Mode Using the AIR Density ButtonAbsolute Measurements Using the Measure Select Button Normal ModePercent-of-Center Measurements Underranging and Overranging Conditions Battery and Bias Annunciators24. Positions of the Battery and Bias Annunciators Gain Setting ModeAborting the Fpgf Changes Saving the Fpgf ChangesBlank Theory of Operation Hardware Block Diagram of the Model 35360A Tracker Display Power SupplyVFD Display Front Panel Switches2 300-VOLT Electronic Bias Supply ProcessorMultiplexer and A/D Converter Serial Communications PortElectrometer Air Density Corrections Model 35300A Ion Chamber DetectorsBasic Operating Equations Basic Operating Quantities Blank Maintenance & Service Problem TroubleshootingNo Display Flowchart Low battery Yes Annuciator displayed? Low Battery Indication at the Display35360A Tracker Bias Error LoBias or HiBias Indication at the DisplayLeakage Flowchart Dose Rate Measurement Zero Problem Flowchart Line Fuse ReplacementIf fuses continue to blow return instrument for repair Replaceable Parts Information Interface Connector CleaningCleaning the Instrument Recalibration & Repair Information / Technical Assistance Replaceable Parts ListCustomization Screen Formats Make a Working DiskConnection to the Computer Starting the Customization SoftwareDisplay Customization Items Screen Appearance F10 Exit F1 Help On-Line Help for using the Customization softwareF2 Edit Item Editing F6 Print Report PrintingDefinitions Ion Chamber Calibration Factor Iccf Setting the Electrometer Gains and OffsetsCharge Gain QG Current Gain, Current Zero IG and ADZElectrometer Charge Gains QG Electrometer Current Gain IGUsage Examples Changing the Power Down IntervalChanging the ION Chamber Calibration Factor Units Input Errors ErrorsBuild-Up, Peg, and Retainer Kit Options Using Build-UpNominal Number of build-up Solid Water Appendix Fluke Biomedical