Thermo EPD Mk2 - Page 4

EPD/HB/40521/000
ISSUE 5
EPD TECHNICAL HANDBOOK Page (vi)
4.2.2 Battery Management....................................................................................................................44
4.3 MECHANICAL DESCRIPTION ................................................................................................................46
4.3.1 Mechanical Characteristics And Dimensions.......................................................................46
4.3.2 Brief Mechanical Description.....................................................................................................46
4.4 ENVIRONMENTAL DESCRIPTION .........................................................................................................48
4.4.1 Environmental Characteristics..................................................................................................48
4.4.2 Brief Environmental Description ...............................................................................................48
4.5 INFRA-RED INTERFACE..........................................................................................................................49
4.5.1 Communicating With The EPD.................................................................................................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) Shock Time Seconds...........................................................................................................................55
(iii) Dose Over-range...................................................................................................................................55
(iv) Dose Rate Over-range.........................................................................................................................55
(v) Counter Over-range ...............................................................................................................................55
(vi) Abuse Warning......................................................................................................................................56
(vii) CRC Failure...........................................................................................................................................56
4.6.8 Dose And Dose Rate Alarm Processing................................................................................56
4.6.9 EPD Operating Status.................................................................................................................57
EPD ‘Run’ and Off times.............................................................................................................................57
EPD State.......................................................................................................................................................57
Alarms ..............................................................................................................................................................58
Faults................................................................................................................................................................58
4.6.10 Dose Profile...............................................................................................................................59
4.6.11 Event History Store.................................................................................................................59
SECTION 5.................................................................................................................................................................61
EPD FAULTS AND RECOVERY ACTIONS........................................................................................................61
5.1 OVERVIEW ..............................................................................................................................................61
5.2 VISUAL AND AUDIBLE FAULT INDICATION...................................................................................62
5.3 INTERNAL LOGGING OF FAULT CONDITIONS ....................................................................................63
5.3.1 EPD Status Faults Record.........................................................................................................63
5.3.2 Event History store.......................................................................................................................63
5.4 BLANK LCD DISPLAY AND OTHER FAULTS.....................................................................................65
5.5 INITIALISATION ERROR ( LCD ---- )...................................................................................................67
5.6 COMMUNICATIONS ERROR ( LCD ==== ).......................................................................................67
5.7 LCD DISPLAY ERROR CODES.............................................................................................................69
5.8 RECOVERY PROCEDURES ..................................................................................................................... 70
5.8.1 Logging Faults / Extracting Data..............................................................................................70
5.8.2 Clearing faults ................................................................................................................................70
SECTION 6.................................................................................................................................................................77
MAINTENANCE........................................................................................................................................................77
6.1 CALIBRATION.........................................................................................................................................77