ELECTRONIC PERSONAL DOSEMETER HANDBOOK
EPD/HB/40521/000
OPERATING INSTRUCTIONS
ISSUE 5
Thermo
Page
23
3.3 Button
Operation
and Display Selection
The EPD will display a range of data to the user. The data displayed is selected
by use of the button. The full range of displays is arranged on a two dimensional
grid, as shown in Figure 3.4. There are a number of menus, each having a top-
level display. Menus are changed by holding down the button (Long Press). This
navigates the user down the left hand side of Figure 3.4. Once the desired menu
has been reached the button must be released. Then, by a series of short
presses, the user can navigate across Figure 3.4 until the desired display within
the current menu has been reached.
Any displays that are disabled are removed from the sequence. Some displays
are usefully disabled if their retention might confuse the wearers of the EPD.
Other displays should be disabled if their retention might cause an operational
risk, for example, the ability to zero dose or adjust alarm thresholds. Such display
configuration is easily done using the
EasyEPD2
software package. A batch write
facility is available in
EasyEPD2
to enable the speedy configuration of a number
of EPD units.
Some displays allow the user to change the status or operation of the EPD. For
example, the user can start, stop and reset the countdown timer. In general,
these operations are activated by “double-pressing” the button. To prevent
unwanted user intervention (e.g. to prevent the user resetting count-down timer)
the EPD can be configured to disable any (or all) of the displays shown in Figure
3.4. Display configuration changes can only be carried out via the IR
communications link.
