ELECTRONIC PERSONAL DOSEMETER HANDBOOK
EPD/HB/40521/000
GETTING STARTED
ISSUE 5
Thermo
Page
9
Figure 2.4 - Inserting The EPD Battery
(v)
To fit the battery cap, first locate it against the special tool or coin, as
appropriate) and align the battery cap tangs with the recesses in the EPD
body. Push the battery cap into the battery compartment opening, ensuring
that:
a)
the body of the battery cap, which houses the (
-
) electrode contact
plate, is fully engaged within the battery compartment,
b)
the cap sits flush with the body of the EPD.
(vi)
Using the special tool or coin, as required, maintain pressure on the battery
cap (against its compression spring), and rotate the battery cap in a
clockwise direction, through approximately 85
°
, to its end-stop. Rotate the
cap slowly to the point where the resistance of the end stop is felt. Avoid
use of excessive force.
2.1.3 Start-up
Sequence
When a battery is inserted into the EPD, fitment of the battery cap will
automatically initiate the start-up sequence. The start-up sequence is as follows:
1.
‘8888’ is shown on the display for approximately three seconds;
2.
internal software initialisation, which checks the state of the EPD (such as
the internal bus, internal memory, each detector amplifier and counter
chain,
etc.);
3.
confidence test sequence, see section 2.1.4 below.
