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Light Therapy Device
Fluke
35040 manual
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Contents
Main
Page
Table of Contents
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Appendix B: Addendum Features of Firmware Version 27JAN00 or Later............. B-1
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Section 1
General Information
1.1 Introduction
1.2 Features
1.3 Before You Start - Safety Precautions
1.4 Safety Symbols And Terms
1.5 Manual Addenda
1.6 Specifications
Charge Measurements
Timed Charge Measurements
Current Measurements
Average Current Measurements
Effective Exposure Time Measurements
General Measurements
High Performance Power Supply and Battery Charger
Internal Electronic High Voltage Ion Chamber Bias Supply
General
Environment
Mechanical
1.7 Unpacking and Inspection
Standard System Contents
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Section 2
Theory of Operation
2.1 Introduction
2.2 Functional Description
2.2.1 Power Supply
2.2.2 Front Panel
2.2.3 MicroController
2.2.4 Serial Communications Port
2.2.5 Electrometer
2.3 Basic Operating Equations
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Charge and Current Measurements
() ( ) () ( )
Leakage Measurements
=
I
()
(
Timed Charge and Dose
()()
)()
Predicted Timed Charge and Dose
2.3.1 Setting Thresholds
Thresholds other than those used by the calibration agency may render inaccurate measurements.
2.3.2 Exposure Time
2.3.3 Air Density Correction Factor
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Section 3
Operation
3.1 Setup
Introduction
3.2 Front Panel Familiarization
Figure 3-1. The Model 35040 Therapy Dosimeter Front Panel
3.3 Rear Panel Familiarization
3.4 Powering The System
3.5 Power-Up Self-Test and Display Messages
Leakage: 0.001 pA
3.6 Ion Chamber Connector
ADC IC Bias: 300.0V CEP
Batt: 6.8 V +0.10 A
3.7 Basic Measurement Techniques
3.7.1 General Considerations
3.7.2 Making Non-Timed Exposure Measurements
3.7.3 Making Timed Exposure Measurements
Timer Setup
Timer Use
The instrument will not permit the timer to be started while leakage is being measured.
3.8 Battery Care
3.9 Operation Instructions
3.9.1 Front Panel Controls
3.9.2 Powering Up the Model 35040 Therapy Dosimeter
*Optional Text Line2
3.9.3 Powering Down the Model 35040 Therapy Dosimeter
*Optional Text Line1
3.9.4 Using the TEST FUNCTION Button
ADC FW Rev: 10JUN93 A
Leakage: 0.001 pA
ADC IC Bias: 300.0 V CEP
Batt: 6.8 V +0.10 A
QScaleFactor=1.0000 IScaleFactor=1.0000
Start Thres: 1.0pA Stop Thres: 0.9pA Current: 0.0pA
Start Thres: 1.0 pA Stop Thres: 0.9 pA Current: 0.0 pA
ADC ALC
Interval: 60 s Count: UP Decimal Places: 0
ADC ALC
Exp Time: HR/MIN/SEC
Calibrated by Keithley RMD Nov 15, 1993
3.9.6 Timer Setup
3.9.7 Setting Thresholds
Interval: 60 s Count: UP Decimal Places: 0
ADC ALC
3.9.8 Using the DETECTOR SELECT Button
The ion chambers calibration unit includes the radiological measurement unit.
3.9.9 Using the AIR DENSITY Button
Farmer - S/N 12345 Co-60 ICCF=4.678E+09 R/C
22.5 C 760 mmHg ADCF = 1.002
3.9.10 Using the UNITS SELECT Button
dose unit: R
3.9.11 Using the BIAS SELECT Button
22.5 C 760 mmHg ADCF = 1.000
OFF
rate unit: R/min
Set: 300.0 V 100% Central Electrde Pos IC Bias: 300.0 V CEP
WARNING
Set: 0.0 V 0% Bias Off IC Bias: 0.0 V OFF
Set: -150.0 V -50% Central Electrde Neg IC Bias:-150.0 V CEN
3.9.12 Using the RESET/MEASURE Button
39.995 nC 59.891 s
659.8 pA
OVER pA
OVER nC OVER s
Figure 3-29. The Measurement Overrange Screen
OVER nC OVER min OVER s
OVER pA
Current Overrange
Reduce exposure and
Internal Reset Error
and Repeat Exposure
Press RESET/MEASURE
3.9.16 Annunciators
ADC ALC Internal Reset Error
39.995 nC 59.891 s
ADC LoBias Tmr ALC
659.8 pA
3.10 Customization
3.10.1 Introduction
3.10.2 Installing/Uninstalling Customization Software
3.10.3 Connection to the Computer
3.10.4 Starting the Customization Software
3.10.5 Downloading
3.10.6 Menu Items and Controls
Ion Chambers, Bias Settings, Special Items, Measurement Displays, or Timer Intervals
COM PORT Drop Down List
3.10.7 Ion Chambers
EDIT
3.10.8 Special Items
DOWNLOAD and CANCEL
3.10.9 Measurement Displays
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Page
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3.10.11 Bias Settings
3.10.12 Examples
Changing the Pressure Units
Customizing a Measurement Display
Appending a Display
Deleting a Display
Inserting a Display
3.10.13 Errors
Printing Error
Com Initialization Error
Serial Link Error
Download Errors
Troubleshooting and Service
4.1 Introduction
4.2 Troubleshooting
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and Repeat Exposure
Press RESET/MEASURE
Service Required
Error Number : 16
Internal Reset Error
Reduce exposure and
Reduce exposure and
Press RESET/MEASURE
Current Overrange
ADC Current Overrange
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4.3 Display Will Not Light
4.4 Low Battery
4.5 Bias Error
4.6 Line Fuse Replacement
4.7 Interface Connector Cleaning
4.8 Cleaning The Instrument
4.9 Replaceable Parts Information
4.10 Recalibration, Repair Information & Technical Assistance
4.11 Warranty Information
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Appendix A
Sample Customization Reports
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Appendix B
Features of Firmware Version27JAN00 or Later
B.1 Introduction
B.2 New Features
B.2.1 Overview
B.2.3 Specifications Update
Charge Measurements
Timed Charge Measurements
Current Measurements
Average Current Measurements
B.3 SETUP
B.3.1 Making Non-Timed Exposure Measurements
With Automatic Leakage Compensation Disabled
Procedure
With Automatic Leakage Compensation Enabled
B.3.2 Making Timed Exposure Measurements
B.4 Operation Instructions
B.4.1 Front Panel Controls
Page
Start Thres: 1.0 pA Stop Thres: 0.9 pA Current: 0.0 pA
ADC ALC
Start Thres: NA pA Stop Thres: NA pA Current: 0.0 pA
ADC OFF
B.4.4 Timer Setup
Interval: 60 s Count: UP Decimal Places: 0
ADC ALC
Press RESET/MEASURE
and Repeat Exposure
ADC ALC Internal Reset Error
39.995 nC 59.891 s
ADC LoBias Tmr ALC
659.8 pA
Page
B.5 Theory Of Operation
Basic Operating Equations
Leakage Measurements
Timed Charge and Dose
()()
B.6 Troubleshooting
Service Required
Error Number : 16
ADC Configuration Error
B.7 Customization
Reduce exposure and
Press RESET/MEASURE
B.7.1 The Main Menu
B.7.2 The Measurement Menu
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Timer Intervals