Fluke TRACKER 90100 Operators, Operator'S Manual

Page 1: ...Model 90100 TRACKER System Operators Manual May 2006 Manual No 37826 Rev 9 2006 Fluke Corporation All rights reserved Printed in U S A All product names are trademarks of their respective companies...

Page 2: ...Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland Ohio 44139 440 498 2564 www flukebiomedical com rms...

Page 3: ...A Detector In The Beam 2 4 2 4 Operation Instructions 2 6 2 4 1 Front Panel Controls 2 6 2 4 2 Powering Up The Model 35360A Tracker Display 2 8 2 4 3 Powering Down The Model 35360A Tracker Display 2 8...

Page 4: ...5 4 Absolute Dose Rate 3 6 3 5 5 Percent of Center 3 6 3 6 Basic Operating Quantities 3 7 Section 4 Maintenance and Service 4 1 4 1 Introduction 4 1 4 2 Troubleshooting 4 2 4 3 Line Fuse Replacement...

Page 5: ...ir density corrections and displays the measurement results on the 4 line by 20 character vacuum fluorescent display VFD directly in the user s choice of radiological units An integrated rechargeable...

Page 6: ...provide worldwide operation by use of the proper line cord The levels of the internal 300 V electronic bias supply and the rechargeable battery supply are continuously monitored Annunciators appear o...

Page 7: ...surement of radiation output knowledgeable about safety procedures observed when working with radiation sources such as therapy radiation machines aware of safety precautions required to avoid possibl...

Page 8: ...lsed 99 9 at 500 rads min continuous Leakage Less than 0 5 pA over the full operating temperature range Ion Chamber Factory Calibration Method Each of the 5 ion chambers within the detector array is c...

Page 9: ...when the input current or charge have exceeded the full scale values The full scale value of any unit is guaranteed not to differ from nominal values by more than 2 Long Term Stability Expected to be...

Page 10: ...an 0 5 pA over the full operating temperature range Connector Type Display interface end has five AMP male coaxial connectors and three AMP male single conductor connectors housed in a single DB 37 ty...

Page 11: ...o Display Interface Cable Build Up Kit 37825 Contains 10 pieces of 0 44 cm acrylic part number 37051 1 Kits containing other quantities of plates plate materials and plate thicknesses are available Pe...

Page 12: ...Model 90100 Operators Manual Blank page...

Page 13: ...ngs for securing the plates to the 35300A Detector are optional with the 90100 TRACKER System See Appendix A for additional information It is recommended that the user customize his Model 35360A TRACK...

Page 14: ...s or less of operation remains When the battery pack is fully discharged the instrument automatically shuts off and will not operate until AC line power is connected The Model 35360A TRACKER Display o...

Page 15: ...ction until tight Figure 2 2 Connecting the Interface Cable to the Model 35360A TRACKER Display Figure 2 3 Connecting the Interface Cable to the Model 35300A Detector D ET ECTO R INP UT 100 240V 50 60...

Page 16: ...tion program during the user customization process 2 3 Positioning the Model 35300A Detector in the Beam Proper and consistent positioning of the 35300A Detector is necessary for reliable measurement...

Page 17: ...or gantry angles of 90 or 270 degrees place the 35300A Detector on its side so the label faces the head Orient the connector away from the gantry This placement is shown in Figure 2 5 Operating the 35...

Page 18: ...s shown here correspond to a particular customization set up Other customization set ups will produce different results 2 4 1 Front Panel Controls Figure 2 6 shows the front panel of the 35360A TRACKE...

Page 19: ...Factor FPGF fields Measure Select The MEASURE SELECT button displays the Measurement screen Subsequent presses toggle the display mode between absolute and percentage presentations Reset The RESET but...

Page 20: ...an additional two seconds the display will change to the Bias and Battery Voltage Test Screen shown in Figure 2 10 As soon as this screen is displayed the 35360A TRACKER Display is fully operational a...

Page 21: ...its full charge the charging circuit switches to trickle charge mode with a corresponding terminal voltage of approximately 7 volts The unit will remain in this trickle charge mode as long as the ins...

Page 22: ...Figure 2 12 The Air Density Screen With Air Density Corrections Enabled To disable the air density correction advance the X cursor to the ADC annunciator at the upper left of the VFD With the X cursor...

Page 23: ...present the measurement data in an absolute form or as a percentage of the center ion chamber While the Measurement screen is displayed press the MEASURE SELECT button to toggle the display mode betw...

Page 24: ...nd the four peripheral ion chamber s readings as a percentage of the center ion chamber s reading top center x 100 left center x 100 right center x 100 bottom center x 100 center units Figure 2 19 A P...

Page 25: ...rrange Conditions Measurement Mode Condition Chamber Reading Absolute Overrange a chamber OVER for chamber Percent of Center Exposure at center chamber too small to calculate percentages UNDER for all...

Page 26: ...before an FPGF can be changed To enter or exit the Gain Setting Mode press and hold the GAIN SELECT button for approximately three seconds Entry into the Gain Setting Mode is indicated by a movement...

Page 27: ...increment or decrement the selected chamber s FPGF For example increasing the left percentage value by 2 will increase the left FPGF by 2 When the measurement values are displayed in the percent of ce...

Page 28: ...Model 90100 Operators Manual Blank page...

Page 29: ...Functional Description of the Model 35360A TRACKER Display The 35360A TRACKER Display contains a five channel electrometer capable of producing measurements of dose and dose rate Its 4 line by 20 char...

Page 30: ...maintain the Battery Pack at its fully charged condition indefinitely When operating from batteries an automatic turn off feature may be used to power down the unit after a user defined period of ina...

Page 31: ...g all of the executable code firmware The revision date associated with this code is displayed during the power up sequence on the VFD Also contained within the Processor block is 32 KBytes of RAM mem...

Page 32: ...2 8 Multiplexer and A D Converter This block consists of an six channel analog multiplexer and 16 bit A D Converter which operates under the direct control of the microcontroller Its main function is...

Page 33: ...absorption takes place in the chamber s windows and build up materials when the incident photons or primary electrons interact with the atoms of these materials When absorption occurs high speed elect...

Page 34: ...60A TRACKER Display it is an intermediate result upon which the dose value directly depends nC count QG counts ADZ counts ADC nC Q 3 5 2 Current Although current is not a value which can be displayed...

Page 35: ...ain of the electrometer A D combination when measuring in the dose mode Charge gain values are field programmable via Customization Software IG Current Gain nC Min Count Overall electrical current gai...

Page 36: ...Model 90100 Operators Manual Blank page...

Page 37: ...ounding type line cord such as the one supplied with the 90100 TRACKER System In addition only connect the 35360A TRACKER Display to an AC power outlet employing a third wire safety ground 4 1 Introdu...

Page 38: ...360A TRACKER Display s VFD does not illuminate when POWER key is pressed See Figure 4 1 Low Battery annunciator is displayed on the 35360A TRACKER Display s VFD See Figure 4 2 Bias error annunciator i...

Page 39: ...ating from AC power source When attempting to turn the instrument on firmly press the POWER key and hold for approximately one second Always allow several seconds between retries NOTE When powering th...

Page 40: ...source and press the POWER key Low Battery annuciator is displayed on 35360A TRACKER Display s VFD Operating from AC power source When powering the 35360A TRACKER Display from an AC line always use a...

Page 41: ...play s VFD Bias error annuciator displayed 35360A TRACKER Display Reconnect interface cable to the 35360A TRACKER Display without the 35300A Detector and recheck VFD for bias Bias error annuciator dis...

Page 42: ...es exhibits a drift rate of greater than two counts per minute in the absence of radiation Clean interface cable connectors via procudure given later in this section and recheck dose drift Excessive d...

Page 43: ...n to within one count of zero in the absence of radiation Dose measurement leakage drift greater than 2 counts per minute The problem appears to be caused by current leakage in one or more measurement...

Page 44: ...g fuses Use only the recommended fuse type The use of a higher current rating than specified above may cause damage to the instrument which will void any or all warranties currently in effect 4 Place...

Page 45: ...dry air is available where camera accessories are sold They are intended for use in cleaning fine and delicate camera equipment If this cleaning method fails to produce satisfactory results then servi...

Page 46: ...ce Cable 37783 30 Customization Kit 37827 DB 9 Female Wiring 37616 7 Ft RJ 45 Cable L COM 105 260 Customization Software Disk 38330 Build Up Plate 37051 Pegs and Retainer Kit 37825 Pegs 37081 Retainer...

Page 47: ...the electrometer gains and zeros and the ion chamber calibration factors may be changed The basic features of the Customization software are its ease of use an on line help facility printer support a...

Page 48: ...tion software Place the working disk into the floppy drive If you wish to operate the Customization software from the hard drive copy all of the files from the working disk to a directory on the hard...

Page 49: ...Help F2 Edit F6 Print F10 Exit Down PgDn Calibration It Up The power down interval specifies the b f minutes the Dosimeter remains powered d i periods of inactivity Enter 0 to disable th Automatic Pow...

Page 50: ...to the Item press Enter After you press Enter the Customization software downloads the new information to the 35360A TRACKER Display In this manner the Customization screens always reflects the inform...

Page 51: ...millibars and hectoPascals Optional Message Text entered for this Item will appear on the bottom line of the 35360A TRACKER Display s Test screen The Item is limited to a maximum of 20 characters Ion...

Page 52: ...ITEMS Charge Gain QG The 35360A TRACKER Display uses the Charge Gain to convert the number from the analog to digital converter to charge The Charge Gain must be in units of nanocoulombs per count Cur...

Page 53: ...cond row 3 Repeat Steps 1 and 2 if the value displayed on the 35360A TRACKER Display is not zero ELECTROMETER GAINS The procedure for setting the electrometer gains differs for current and charge For...

Page 54: ...play CHANGING THE PRESSURE UNITS 1 Place the cursor on the Pressure Units Item 2 Press F2 The function key area indicates the keys used to make a choice 3 Press the spacebar or use the up and down arr...

Page 55: ...7 Press F2 8 Enter the original value and press Enter 9 The software restores the original value in the instrument CHANGING THE CURRENT GAIN This example changes the current value of a factory set cur...

Page 56: ...munications between the computer and the instrument is faulty Generally the icon in the upper right corner indicates the status of the RS 232 connection The following errors indicate problems during a...

Page 57: ...Detector are also available as optional accessories see Figure A 1 The build up pegs a set of eight screw into threaded holes in the 35300A Detector four build up pegs can be installed on each side of...

Page 58: ...s not require any added build up Table A 1 Recommended Amount of Build up to Use With the Model 35300A Detector to Attain Photons dmax for Linear Accelerators Nominal Accelerator Potential MeV Number...

Page 59: ...0 5 4 1 0 5 5 2 1 0 6 2 1 0 7 3 1 5 8 3 1 5 9 4 2 0 10 5 2 0 11 5 2 5 12 6 3 0 13 6 3 0 14 7 3 5 15 7 3 5 16 8 4 0 17 8 4 0 18 9 4 5 19 10 4 5 20 10 5 0 21 11 5 5 22 11 5 5 23 12 6 0 24 12 6 0 25 13 6...

Page 60: ...Fluke Biomedical Radiation Management Services 6045 Cochran Road Cleveland Ohio 44139 440 498 2564 www flukebiomedical com rms...