Thermo EPD Mk2 User Manual

EPD/HB/40521/000
ISSUE 5
EPD TECHNICAL HANDBOOK Page 97
In built
Integrity
Checks
Detector Test Regular ‘flash LED’ detector test, also available on
demand over the communications link, at time of issue.
Non volatile
store.
Dose data copied to non-volatile store every 15
minutes ( and more regularly to dose profile ).
Processing /
Memory
checks.
Critical data areas, dose stores, calibration factors,
communications data, are all protected by powerful 16
bit polynomial crc ( Cyclic Redundancy Check ).
Calibration. EPDs normally supplied with Calibration factors in the
‘locked’ state and only changeable by Thermo Electron.
On request Thermo Electron will supply units with
calibration factors unlocked.
Dose Data
verification
User ‘dose’ readings also include detector counts and
associated ‘quality’ data such as impact counts, reset
counts, fault data. Dose and count data may be
‘sensibility’ tested .
ADS Facilities ADS Issue EPD may be ‘permanently’ issued by ADS but also
used on an access control system ( by the same wearer
).
ADS Store Dose and supporting data is accumulated in an
additional password protected ADS store.
System
Integration
Facilities
Messaging
Interface
A powerful and efficient messaging interface allows fast
and secure data transfer and speedy issue and return
times. Data is protected by 16 bit crc. Issue and
Return times take circa 1 second. Returns take longer if
extensive dose profile data is being extracted.
EPD Identity Every EPD has a unique serial number provided on the
case label ( numeric and bar-coded ) and duplicated in
internal memory. The latter is accessible over the
communications link.
Mark Number Every EPD is manufactured to a defined Mark Number
which is detailed on the case label and duplicated in
internal memory. The latter is accessible over the
communications link.
Wearer ID 12 character numeric wearer ID, displayable on EPD
LCD ( both control and ADS wearer IDs ). By
convention the wearer ID for a non-issued EPD is set to
FFFFFFFFFFFF.
Wearer Name 22 character wearer name ( may be used but is not

Thermo EPD Mk2 Specifications

General

Brand	Thermo
Model	EPD Mk2
Category	Measuring Instruments
Language	English