Thermo Electron EPD MK2 - Page 9

ELECTRONIC PERSONAL DOSEMETER HANDBOOK
EPD/HB/40521/000
CONTENTS
ISSUE 5
Thermo
Page (v)
SECTION 5................................................................................................................................. 63
EPD FAULTS AND RECOVERY ACTIONS
............................................................................. 63
5.1 O
VERVIEW .................................................................................................................. 63
5.2 V
ISUAL AND AUDIBLE FAULT INDICATION ..................................................................... 64
5.3 I
NTERNAL LOGGING OF FAULT CONDITIONS.................................................................. 65
5.3.1
EPD Status Faults Record.................................................................................... 65
5.3.2 Event History store ............................................................................................... 65
5.3.3 Dose Quality Factors............................................................................................ 66
5.4 BLANK LCD DISPLAY AND OTHER FAULTS .................................................................. 67
5.5 I
NITIALISATION ERROR ( LCD ---- ) ............................................................................. 69
5.6 C
OMMUNICATIONS ERROR ( LCD ≡≡≡≡ ) .................................................................... 69
5.7 LCD D
ISPLAY ERROR CODES ..................................................................................... 71
5.8 R
ECOVERY PROCEDURES ............................................................................................ 72
5.8.1
Logging Faults / Extracting Data .......................................................................... 72
5.8.2 Clearing faults....................................................................................................... 72
SECTION 6................................................................................................................................. 79
MAINTENANCE
......................................................................................................................... 79
6.1 C
ALIBRATION .............................................................................................................. 79
6.2 T
HE EPD BATTERY..................................................................................................... 82
6.2.1
Replacement Batteries ......................................................................................... 82
6.2.2 Battery Leakage ................................................................................................... 82
6.2.3 Lithium Thionyl Chloride Battery Warning............................................................ 82
6.2.4 Replacing the EPD Battery................................................................................... 84
6.3 EPD CLIP ASSEMBLY ................................................................................................. 86
6.3.1
Removing the EPD Lanyard Plate/Clip Assembly................................................ 87
6.3.2 Replacing The EPD Lanyard Plate/Clip Assembly............................................... 88
6.4 CLEANING................................................................................................................... 89
6.4.1
General Cleaning.................................................................................................. 89
6.4.2 Radiological Cleaning........................................................................................... 89
6.4.3 Cleaning after a Battery Leakage......................................................................... 89
6.4.4 Periodic Cleaning ................................................................................................. 90
APPENDIX A ............................................................................................................................. 91
RADIOLOGICAL SPECIFICATIONS ........................................................................................ 91
APPENDIX B ............................................................................................................................. 93
ELECTROMAGNETIC COMPATIBILITY.................................................................................. 93
APPENDIX C ............................................................................................................................. 97
SUMMARY OF GENERAL PHYSICAL & FUNCTIONAL CHARACTERISTICS.................. 97
APPENDIX D ........................................................................................................................... 102
EPD FAULT LOG FORM......................................................................................................... 103