Fluke 35040 Manual de usuario

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35040
Therapy Dosimeter
Operators Manual
February 2005
Manual No. 37870 Rev. 10
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
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Indice de contenidos

Pagina 1 - Therapy Dosimeter

35040 Therapy Dosimeter Operators Manual February 2005 Manual No. 37870 Rev. 10 ©2004, 2005 Fluke Corporation, A

Pagina 2

35040 Operators Manual 1-4 Measurement Accuracy: Charge measurement accuracy is warranted to be better than ± (0.20%rdg + 2 counts) over the operat

Pagina 3 - Table of Contents

General InformationSpecifications1 1-51.0000 μA 0.0001 μA Measurement Method: Average current measurement is derived by monitoring the charge integ

Pagina 4

35040 Operators Manual 1-6 0.10%0.10%]5Period[ Error Charge Observed +×≤ and 0.15%0.10%]5Period[ Error Current Observed +×≤ where “Period” is the

Pagina 5

General InformationSpecifications1 1-7command, or exposure detection). The automatic power down feature applies only when the instrument is operat

Pagina 6 - (Blank page)

35040 Operators Manual 1-8 - CD, 35040 Standard Customization (37870CD) - 9-pin connector adaptor (37616) - 7 foot RJ-45 Cable (105-260)

Pagina 7 - General Information

Theory of OperationIntroduction2 2-1Section 2 Theory of Operation 2.1 Introduction The Model 35040 Therapy Dosimeter is a radiation measurement in

Pagina 8 - 1.4 Safety Symbols And Terms

35040 Operators Manual 2-2 2.2.1 Power Supply During operation, the instrument may be powered by line voltage in the range of 100 to 240 VAC or fro

Pagina 9 - 1.6 Specifications

Theory of OperationFunctional Description2 2-32.2.5 Electrometer The electrometer is a single range, resettable, integrating amplifier. The high sp

Pagina 10 - (0.20%rdg + 2

35040 Operators Manual 2-4 Table 2-1. Description of Quantities Quantity Description Units Comments ADCF Air Density Correction Factor None Calcula

Pagina 11 - General Measurements

Theory of OperationBasic Operating Equations2 2-5Charge and Current Measurements The instrument’s electrometer charge and current measurements are f

Pagina 12 - [ Error Charge Observed +×≤

Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564

Pagina 13 - 1.7 Unpacking and Inspection

35040 Operators Manual 2-6 Figure 2-2. Leakage Current and Start of Exposure When automatic exposure detection is disabled (start and

Pagina 14

Theory of OperationBasic Operating Equations2 2-7 Q1 represents the next sample of charge at time T1 following the activation of the timer. Q2 cor

Pagina 15 - Theory of Operation

35040 Operators Manual 2-8 or dielectric absorption. The start and stop thresholds are set independently, but the stop threshold must be less than

Pagina 16 - 2.2.2 Front Panel

Theory of OperationBasic Operating Equations2 2-9 Figure 2-3. Average Current and Exposure Time 2.3.3 Air Density Correction Fac

Pagina 17 - 2.2.6 Bias Supply

35040 Operators Manual 2-10 Table 2-2. Air Density Adjustment Ranges and Resolutions Units Display Minimum Maximum Standard Resolution % Error* i

Pagina 18 - Leakage

OperationSetup3 3-1 Section 3 Operation 3.1 Setup Introduction This section contains set-up and connection procedures for the Model 35040 Therapy

Pagina 19 - Leakage Measurements

35040 Operators Manual 3-2 3.3 Rear Panel Familiarization Figure 3-2. The Model 35040 Therapy Dosimeter Rear Panel RS-232 Receptacle

Pagina 20 - Timed Charge and Dose

OperationPowering the System3 3-3The Model 35040 Therapy Dosimeter operates on battery power for eight hours after a full charge. The dosimeter can

Pagina 21 - 2.3.1 Setting Thresholds

35040 Operators Manual 3-4 Mating and unmating to this connector (or to the other end of a cable already connected to it) should be done only wh

Pagina 22 - 2.3.2 Exposure Time

OperationBasic Measurement Techniques3 3-5Procedure: • The annunciator line on the Measurement screen displays "WAIT System Not RDY" whil

Pagina 23

iTable of Contents Section 1: General Information... 1-1 1.1 Intr

Pagina 24

35040 Operators Manual 3-6 Use the predicted timed charge or dose measurement to diagnose a problem at the onset of a timed measurement for sourc

Pagina 25 - Operation

OperationBattery Care3 3-7instrument will not be available for use. Depending upon the level of discharge, this period of unavailability may be on

Pagina 26 - ION CHAMBER INPUT

35040 Operators Manual 3-8 and bias voltages, automatic leakage compensation settings, and timer settings. • When the Test Function screen is dis

Pagina 27

OperationOperation Instructions3 3-9 When attempting to turn the instrument on, firmly press the POWER button and hold for approximately one second

Pagina 28

35040 Operators Manual 3-10 Figure 3-8 shows the ion chamber bias voltage (IC Bias), the system leakage current (Leakage), and the battery voltage

Pagina 29

OperationOperation Instructions3 3-11 Figure 3-11. The Test Function Screen Showing the Automatic Leakage Compensation Settings Figure 3-12

Pagina 30 - 3.8 Battery Care

35040 Operators Manual 3-12 With the automatic leakage compensation settings displayed (Figure 3-14), press the TEST FUNCTION button. The "f&

Pagina 31 - 3.9 Operation Instructions

OperationOperation Instructions3 3-133.9.6 Timer Setup The Test Function screen provides for configuring the timer interval, count mode, and decimal

Pagina 32

35040 Operators Manual 3-14 3.9.8 Using the DETECTOR SELECT Button Pressing the DETECTOR SELECT button displays the Detector Select screen, see F

Pagina 33 - FW Rev: 10JUN93 A

OperationOperation Instructions3 3-15 Figure 3-20. The Air Density Screen With Air Density Corrections Disabled Air density correction is on

Pagina 34 - Batt: 6.8 V +0.10 A

ii3.9.12 Using the Reset/Measure Button ... 3-17 3.9.13 Overrange Co

Pagina 35 - ADC ALC

35040 Operators Manual 3-16 Figure 3-23. The Bias Select Screen With the Bias Set to a Positive Voltage Figure 3-24. The Bias Sel

Pagina 36 - Nov 15, 1993

OperationOperation Instructions3 3-173.9.12 Using the RESET/MEASURE Button The RESET/MEASURE button has dual functionality. If no Measurement scre

Pagina 37 - Decimal Places: 0

35040 Operators Manual 3-18 Figure 3-28. The Measurement Screen With the Charge and Current Limits Exceeded After the First 60 Seconds

Pagina 38

OperationOperation Instructions3 3-19A reset error will not occur for ion chambers calibrated in dose rate units (i.e. Brachytherapy chambers) since

Pagina 39 - ADCF = 1.000

35040 Operators Manual 3-20 Figure 3-32. Annunciator positions Table 3-2 lists the indicators the instrument uses to signal that a measure

Pagina 40

OperationCustomization3 3-213.10 Customization 3.10.1 Introduction The Model 35040 Therapy Dosimeter is shipped with valid settings allowing you t

Pagina 41 - 35040 Therapy Dosimeter

35040 Operators Manual 3-22 35040 Customization Software, verify that COM PORT indicator is green, and click on the UPLOAD button. We recommend th

Pagina 42 - OVER pA

OperationCustomization3 3-23CONNECT Select CONNECT to force an initialization the computer’s serial port for use with the 35040 Customization Softwa

Pagina 43 - Internal Reset Error

35040 Operators Manual 3-24 Figure 3-34. The Ion Chambers Form EDIT To modify existing ion chamber parameters, click twice

Pagina 44 - ADC LoBias Tmr ALC

OperationCustomization3 3-25OK and CANCEL When you complete your editing of ion chamber parameters, you may use OK or CANCEL to exit the Parameter E

Pagina 45 - 3.10 Customization

iiiAppendix B: Addendum Features of Firmware Version “27JAN00” or Later...B-1 B.4.5 Reset Error (with Automatic Leakage Compensation E

Pagina 46 - 3.10.5 Downloading

35040 Operators Manual 3-26 Figure 3-36. The Special Items Menu (Calibration Temperature has focus) To modify th

Pagina 47 - 3.10.7 Ion Chambers

OperationCustomization3 3-273.10.9 Measurement Displays The Model 35040 Therapy Dosimeter can contain up to sixteen (16) measurement displays, which

Pagina 48

35040 Operators Manual 3-28 Table 3-4. Available Display Lines Display Line Group Title Appearance (on a Measurement Display) Blank Line Air D

Pagina 49 - 3.10.8 Special Items

OperationCustomization3 3-29Display Line Group Selection Click on the Group’s DOWN arrow key and select another group from the drop down list by cli

Pagina 50

35040 Operators Manual 3-30 Upon completing the insertion, the Customization software tells the Model 35040 Therapy Dosimeter to insert the Di

Pagina 51 - 3.10.9 Measurement Displays

OperationCustomization3 3-31The Model 35040 Therapy Dosimeter displays the timer intervals in the same order they are entered. That is, it does not

Pagina 52

35040 Operators Manual 3-32 When you press Bias Select on the Model 35040 Therapy Dosimeter front panel, the UP & DOWN keys allow you to selec

Pagina 53

OperationCustomization3 3-331. Clicking on the Power Down Interval places the input focus there. 2. Keyboard: Enter 15 into the Edit Box. 2. Clic

Pagina 54

35040 Operators Manual 3-34 2. The Customization software prompts you to enter a Display number ahead of which to insert a new Display. Type 3 a

Pagina 55 - 3.10.11 Bias Settings

Troubleshooting and ServiceIntroduction4 4-1Section 4 Troubleshooting and Service The Model 35040 Therapy Dosimeter contains no internal operat

Pagina 57 - Inserting a Display

35040 Operators Manual 4-2 The decision trees of the second part are presented in text format. To use the decision tree, start with statement numb

Pagina 58 - 3.10.13 Errors

Troubleshooting and ServiceTroubleshooting4 4-3Explanation: The low battery annunciator is a reminder that while running on the battery, there is

Pagina 59 - Troubleshooting and Service

35040 Operators Manual 4-4 7 Additional operator settings are invalid. Select the proper settings from the front panel. 8 Timer interval customizat

Pagina 60

Troubleshooting and ServiceTroubleshooting4 4-5 Example: 299.9 to 300.0 Cause: Rounding error in measurement. Action: None. Explanation: Th

Pagina 61

35040 Operators Manual 4-6 4.3 Display Will Not Light Go to line: 1. Is the instrument connected to line voltage? YES NO 2 4 2. Disconnect the

Pagina 62 - Current Overrange

Troubleshooting and ServiceLow Battery4 4-74.4 Low Battery Go to line: 1. Is the instrument connected to line voltage? Is the instrument connect

Pagina 63

35040 Operators Manual 4-8 4.5 Bias Error Go to line: 1. Is "??Bias" displayed? YES NO 2 6 2. Has the instrument been on for more t

Pagina 64 - 4.3 Display Will Not Light

Troubleshooting and ServiceLine Fuse Replacement4 4-94.6 Line Fuse Replacement Disconnect the Model 35040 Therapy Dosimeter from other equipment a

Pagina 65 - 4.4 Low Battery

35040 Operators Manual 4-10 If fuses continue to fail - return the instrument for repair. 4.7 Interface Connector Cleaning Select 0.0 V bias s

Pagina 66 - 4.5 Bias Error

Troubleshooting and ServiceReplaceable Parts Information4 4-11Table 4-1. Replaceable Parts List 4.10 Recalibration, Repair Information & Tec

Pagina 67 - 4.6 Line Fuse Replacement

General InformationIntroduction1 1-1Section 1 General Information 1.1 Introduction The Model 35040 Therapy Dosimeter is designed for calibration d

Pagina 68 - 4.8 Cleaning The Instrument

35040 Operators Manual (Blank Page)

Pagina 69 - 4.11 Warranty Information

AppendixSample Customization ReportsA A-1Appendix A Sample Customization Reports A.1 Sample Documents This section contains sample documents that t

Pagina 70 - (Blank Page)

35040 Operators Manual A-2

Pagina 71 - Sample Customization Reports

AppendixSample Customization ReportsA A-3

Pagina 72

35040 Operators Manual A-4

Pagina 73

AppendixSample Customization ReportsA A-5

Pagina 74

35040 Operators Manual (Blank page)

Pagina 75

AppendixFeatures of Firmware Version “27JAN00” or Later B B-1Appendix B Features of Firmware Version”27JAN00” or Later B.1 Introduction This adden

Pagina 76

35040 Operators Manual B-2 Refer to the following sections for details on the timed measurements: • Section B.3.2, Making Timed Exposure Measuremen

Pagina 77 - Appendix B

AppendixNew FeaturesB B-31.000 μA 0.001 μA 1 Average Current Measurements Range and Resolution: Full Scale Range Display Resolution 200.00 pA 0.01

Pagina 78 - Current Measurements

35040 Operators Manual 1-2 WARNING • The ion chamber bias voltage may be set to one of 11 user-customized settings. The display indicates the pol

Pagina 79 - B.3 SETUP

35040 Operators Manual B-4 Procedure • The annunciator line on the Measurement screen displays "WAIT System Not RDY" while the instrument

Pagina 80

AppendixSetupB B-5a timed measurement for sources that deliver at a constant exposure rate. If the predicted timed measurement is drastically diffe

Pagina 81 - B.4 Operation Instructions

35040 Operators Manual B-6 Interval: 60 sCount: UPDecimal Places: 0ADC ALCB.4.2 Using the Test Function Button Figure B.1 sh

Pagina 82

AppendixOperation InstructionsB B-7the instrument will cease updating the exposure measurements when the current drops below the stop threshold and w

Pagina 83

35040 Operators Manual B-8 B.4.4 Timer Setup The Test Function screen provides for configuring the timer interval, count mode, and decimal places

Pagina 84

AppendixOperation InstructionsB B-9B.4.6 Annunciators, Indicators, and Overrange Conditions Table B-1 specifies the annunciators that may appear on

Pagina 85

35040 Operators Manual B-10 Table B-3 specifies the conditions that cause the Model 35040 Therapy Dosimeter to display an overrange indicator (OVER)

Pagina 86

AppendixTheory of OperationB B-11 B.5 Theory Of Operation Basic Operating Equations Quantity Description Units Comments QTimed Timed Charge C The

Pagina 87 - 12Leakage12Timed TTIQQQ

35040 Operators Manual B-12 B.6 Troubleshooting This section outlines steps that the operator may take to identify and correct problems. Symptom: &

Pagina 88 - Configuration Error

AppendixOperation InstructionsB B-13 Cause: The input current has exceeded the 1.200 uA limit. Action: Stop the exposure. Change the setup to red

Pagina 89

General InformationSafety Symbols and Terms1 1-3CAUTION The heading used in this manual explains hazards that could damage the instrument. Su

Pagina 90

35040 Operators Manual B-14 Figure B-9 shows the Measurement Displays dialog box. Figure B-9. The Measurement Displays Dialog Box (shown with the

Pagina 91 - Timer Intervals

AppendixCustomizationB B-15Table B-4. Available Display Lines Display Line Group (on the Rotating Rack) Title (on the Rotating Rack) Appearance (

Pagina 92

35040 Operators Manual B-16 Figure B-10. The Timer Intervals dialog box Select a field by pressing TAB until it is highlighted, or click on it wi

Pagina 94

Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland, Ohio 44139 440.498.2564

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