Operating Manual – Description of the Device
In normal operation:
Depending on the currently selected display
(ALT key), the Auto Range function decides in
an overrange condition whether to switch to the
next higher range with REPEAT or whether to
track the signal continuously. As in pulsed oper-
ation, the initial, most sensitive range is AUTO L.
If DIADOS E is in the dose rate mode at the time
the overrange condition occurs, it will immedi-
ately start switching ranges until the suitable
range is found.
If the range changes in the dose rate mode (e.g.
from LOW to MED), the displayed dose value
will read “OL” because it could not be correctly
determined. After the end of the measurement,
the dose rate readout will again begin with
AUTO L.
If DIADOS E is displaying the dose or time when
the overrange occurs, it will behave as in the
pulsed operating mode: the message REPEAT
appears after identification of the condition and
the next higher range is selected after the
measurement. After the end of the measurement
and when the dose is displayed, the measuring
range remains set until RESET is activated.
1.5.9 ALT Key
In combination with the keys APPL, MODE and
RESET, ALT activates the second function as-
signed to each key.
ALT + APPL. FILTER
ALT + MODE RANGE
ALT + RESET ZERO
During and after a measurement, you can use the
ALT key to toggle between display of
dose, dose rate and time in normal operation
or of
dose, dose per pulse and number of pulses in
pulsed operation.
ALT can also be used to exit the Setup menu and
the sub-menus. If you exit sub-menus with ALT, all
changes in that sub-menu will be lost.
1.5.10 TIMER Function
Measurements with the timer are only possible in
normal mode. Pressing the START/STOP key
disables the timer function.
Functional description:
The timer function can be used to determine the
average dose rate over an interval of 2 s or 20 s.
To exclude the effects of switching on/off, the first
3 s and the last 3 s of the measuring interval will be
ignored.
The measuring interval is determined by the end of
the measurement (the measurement ends as soon
as the measuring signal is removed).
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