Thermo Electron EPD MK2 - 4.6 EPD Internal Processing & Facilities; 4.6.1 Memory Characteristics

ELECTRONIC PERSONAL DOSEMETER HANDBOOK
EPD/HB/40521/000
TECHNICAL DESCRIPTION
ISSUE 5
Thermo
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 1
µSv. Store for up
to 579 records for transitions up to 127
µ
Sv 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.