EPD/HB/40521/
000
ELECTRONIC PERSONAL DOSEMETER HANDBOOK
FAULTS AND RECOVERY ACTIONS
ISSUE 5
Page 72
Thermo
5.8 Recovery
Procedures
5.8.1
Logging Faults / Extracting Data
All faults other than the communications error described in section 5.6 should be
logged using the standard Form in the Appendices. This form may be used to log
single or multiple faults. The completed form should be copied to the supplier of
the EPD ( Thermo or other supplier / Distributor ).
If the unit is in operational use it is recommended that as much fault and
operational data as possible is extracted from the unit, via the LCD and using
EasyEPD2. The extent that this is possible will depend upon the nature of the
fault. Note that for many faults button/display operation and IR communications
are unaffected. This includes many Fxxx codes displayed on the LCD. Data
should be extracted and logged as follows:
1. Display fault code or indication ( Fxxx, ---- ).
2. Internal faults logged in the EPD Status Faults record.
3. Contents of internal Event History store.
4. Dose and peak dose-rate/time data ( if a spurious dose fault is suspected ).
5. Dose profile data ( if a spurious dose fault is suspected ).
Where possible the data should be obtained as screen dumps from EasyEPD2
and attached to the completed Fault Log Form ( Appendix D ).
If a faulty unit is to be returned to Thermo it must be returned in a fully
decontaminated and reasonably clean condition. The battery must be removed
but kept with the unit. The date of installation of the battery should be marked on
the battery.
5.8.2 Clearing
faults
The steps required to clear a fault are as follows:
1.
Extract data and fault information and complete a Fault Log Form,
Appendix D.
2.
Identify the fault type in Tables 5.1 or 5.2 and take the recommended
action. This will range from resetting the unit (removing, then
replacing the battery), to returning the unit to the supplier ( Thermo
or other Supplier or Distributor ).
3.
If the unit is to be restored to operational use, clear down all faults on
display and in the Fault Status Record, using EasyEPD2. This is to
ensure that any subsequent faults are detected.
