EPD/HB/40521/000
ISSUE 5
EPD TECHNICAL HANDBOOK Page 51
4.6 EPD Internal Processing & Facilities
This section describes the internal processing performed by the EPD and the
facilities provided over the IR communications link.
4.6.1 Memory Characteristics:
Memory Retention: 10-year data retention.
Dose Profile History: Settable interval from two seconds to 35 hours.
Stores transitions of Hp(10) and Hp(0.07) at a
resolution of 1µSv. Store for up to 579 records
for transitions up to 127 µSv or less.
Dose Store (short term): Hp(10) and Hp(0.07). Can be reset after each
controlled area entry, day, month (etc) by health
physics staff or dose management system,
according to local procedures.
Total Dose Store: Separate total dose store.
Special Total Dose Store: 12 entries, e.g. for automatic recording of end
of month dose etc.
Event Log: 23 entries for time recording of alarms etc., for
incident assessments.
ADS Dose Store: Approved Dosimetry Service (Record of Dose)
dose memory area with password protection.
Peak Dose Rates: Peak dose rates with time of occurrence.
Storage Times: 1 second resolution.
Alarm Flags: Various alarm and fault flags.
Timer: Count-down timer configurable up to 1 hour 39
minutes and 59 seconds (1 second resolution).
Return for Read: Programmable warning.
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