Reset/Measure, Setup B | Fluke 35040 instruction

Appendix

Setup B

a timed measurement for sources that deliver at a constant exposure rate. If the predicted timed measurement is drastically different from the expected value, there is no reason to wait for the complete timer interval to expire before investigating the cause of the discrepancy.

NOTE

To differentiate the predicted and non-predicted timed measurements, the instrument alternates the display of time with a “PREDICT” indicator on the predicted timed measurement lines.

B.4 Operation Instructions

B.4.1 Front Panel Controls

Test Function

•When the Test Function screen is not displayed, pressing the TEST FUNCTION button displays the Test Function screen and the information/settings that were last viewed since power-up.

NOTE

The TEST FUNCTION screen provides access to information and settings such as the firmware revision, charge and current scale factors, battery and bias voltages, automatic leakage compensation settings, and timer settings.

•When the Test Function screen is displayed, pressing the TEST FUNCTION button displays a cursor that allows modification of the following settings:

-Enabling or disabling automatic leakage compensation or setting of the start and stop exposure current thresholds

-Selecting the timer interval, count mode, and decimal places

-Specifying the effective exposure time presentation

RESET/MEASURE

•When the Measurement screen is not displayed, pressing the RESET/MEASURE button displays the Measurement screen and the Measurement display that was last viewed since power-up.

•When the Measurement screen is displayed:

-And when the instrument is performing exposure measurements, pressing the RESET/MEASURE button toggles the timer

-Pressing and holding the RESET/MEASURE button for one second zeroes all exposure measurements; the instrument also zeroes leakage measurements if leakage was being measured

B-5

Image 81

Fluke 35040 manual Reset/Measure, Setup B

Contents

Therapy Dosimeter 35040 Fluke 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 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 Specifications Effective Exposure Time MeasurementsGeneral 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 Charge and Current Measurements Leakage 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 Air Density Correction Factor ⎝ PMm 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 Basic Measurement Techniques General ConsiderationsMaking Non-Timed Exposure Measurements Timer Setup Timer Use3Making Timed Exposure Measurements Using Other Ion Chambers Battery Care Battery Care PowerOperation Instructions Front Panel Controls Powering 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 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 Reset Error Overrange ConditionsCondition 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 Downloading Menu Items and ControlsCOM Port Drop Down List Ion Chambers Close or File CloseFile 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 Bias Error Go toLine Model 35040 Therapy Dosimeter Fuse Replacement Line Fuse Replacement Interface Connector Cleaning Cleaning The InstrumentReplaceable 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 Introduction New Features OverviewTimed Measurements Specifications Update New Features B Setup Timer Setup Procedure Timer Use 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 Annunciators, Indicators, and Overrange Conditions Table B-2. Measurement Indicators and ConditionsTable B-1. Annunciators Condition Overranged Measurement1 Table B-3. Overrange Conditions Theory of Operation Theory Of Operation Configuration 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