EPD/HB/40521/000 ELECTRONIC PERSONAL DOSEMETER HANDBOOK
CONTENTS
ISSUE 5
Page (iv) Thermo
SECTION 4................................................................................................................................. 41
TECHNICAL DESCRIPTION.....................................................................................................41
4.1 GENERAL ................................................................................................................... 41
4.2 ELECTRICAL DESCRIPTION.......................................................................................... 42
4.2.1 Electrical Characteristics...................................................................................... 42
4.2.2 Battery Management ............................................................................................ 42
4.2.3 On / Off Operating Modes .................................................................................... 44
4.3 MECHANICAL DESCRIPTION ......................................................................................... 45
4.3.1 Mechanical Characteristics And Dimensions.......................................................45
4.3.2 Brief Mechanical Description................................................................................ 45
4.4 ENVIRONMENTAL DESCRIPTION ................................................................................... 47
4.4.1 Environmental Characteristics..............................................................................47
4.4.2 Brief Environmental Description........................................................................... 47
4.5 INFRA-RED INTERFACE ................................................................................................ 48
4.5.1 Communicating With The EPD............................................................................. 48
4.5.2 EPD Configuration via the IR Communications Links.......................................... 49
4.6 EPD INTERNAL PROCESSING & FACILITIES .................................................................. 51
4.6.1 Memory Characteristics:.......................................................................................51
4.6.2 Alarm Characteristics: .......................................................................................... 52
4.6.3 Default Display ..................................................................................................... 52
4.6.4 User Identification................................................................................................. 52
4.6.5 Dose and Dose Rate............................................................................................ 53
Dose......................................................................................................................... 53
Dose Rate ................................................................................................................ 53
4.6.6 Counts .................................................................................................................. 54
4.6.7 Dose Quality Flags...............................................................................................55
(i) Reset Count........................................................................................................ 55
(ii) Knock Time Seconds ......................................................................................... 55
(iii) Dose Over-range...............................................................................................55
(iv) Dose Rate Over-range......................................................................................56
(v) Counter Over-range........................................................................................... 56
(vi) Abuse Warning..................................................................................................56
(vii) CRC Failure......................................................................................................56
(viii) Low Voltage (EPD firmware version 11 and later)..........................................56
(ix) Detector Fault (EPD firmware version 11 and later)........................................ 56
4.6.8 Dose And Dose Rate Alarm Processing ..............................................................56
4.6.9 EPD Operating Status ..........................................................................................57
EPD ‘Run’ and Off times .......................................................................................... 58
EPD State................................................................................................................. 58
Alarms ......................................................................................................................58
Faults........................................................................................................................58
4.6.10 Dose Profile......................................................................................................60
4.6.11 Event History Store .......................................................................................... 61
