DIADOS E
T11035
Operating Manual
– Description of the Device
18
D616.131.00/10 en
Figure 5:
Timer function
At the end of the measurement, the dose rate aver-
aged over the timer interval will be indicated.
NOTE
Purpose of
the timer interval “2 s”:
You will select the 2 s timer interval if DIADOS E
is to continue indicating the dose rate after radia-
tion has been removed (when the timer is off, the
dose rate displayed after removal of radiation is
0.0).
Measuring tasks:
a) Display of the dose rate value after removal
of radiation:
Recommended timer interval: 2 s (selection in
the Setup menu). DIADOS E starts averaging
3 s after a dose rate signal has been detected,
the displayed time blinks. The dose rate signal is
required for another 5 s at minimum. The dis-
played time stops blinking and DIADOS E stores
the measured dose rate values which are aver-
aged over 2 s in each case. When radiation is
removed, DIADOS E will display the dose rate
value measured 3 s before removal of radiation.
b) Determining the Average Dose Rate Over a
Period of 20 s:
The timer interval shall be set to 20 s (selection
in the Setup menu). DIADOS E starts averaging
3 s after a dose rate signal has been detected,
the displayed time blinks. The dose rate shall
now be maintained constant until the time dis-
played on DIADOS E stops blinking (this is the
case after another 23 s). Radiation can now be
removed. DIADOS E will display the dose rate
averaged over the last 20 s of fluoroscopy, while
ignoring the last 3 s.
NOTE
If the dose rate signal ends while the displayed
time still blinks, the average is calculated on the
basis of the existing values (with the exception of
the first and last 3 s) and the corresponding
measuring time is displayed. If the irradiation
time is less than 6 s, DIADOS E will indicate a
measured value of zero for dose rate, dose and
time. The dose is calculated on the basis of the
average dose rate and the irradiation interval.
