DIADOS E
T11035
Operating Manual
– Performing a Measurement
D616.131.00/10 en
31
NOTE
The displayed dose per pulse result is a value
averaged over all pulses of the series. A change
of the dose rate during the measurement, without
a minimum pause of the measuring delay time,
will cause erroneous readouts.
If a pulse count error occurs due to a signal that is
too small (see section 2.8.3) DIADOS E will display
“LO” instead of the value.
Dose rate measurement:
During dose rate measurements, the dose rate is
displayed at intervals of 0.5 s. If the timer is active,
the measuring time will blink for a period of time
equivalent to the timer setting plus 6 s. Afterwards,
the measuring time will stop blinking.
Digital resolution:
If the resolution is insufficient, one or two asterisks
(* or **) are displayed to the left of the measured
value.
If the digital resolution is below 1 %, two asterisks **
are displayed. For resolutions between 0.5 % and
1 %, one asterisk * is displayed. When no asterisks
are displayed, the digital resolution is better than
0.5 %.
4.2.5 Ending the Measurement
A measurement initiated with Autostart ends auto-
matically when no measuring signal is detected for
more than the measuring delay time. It is not possi-
ble to stop the measurement manually. RESET
aborts a measurement and resets the measured
values to zero. With START/STOP you abort an
Autostart measurement and initiate a manual
measurement.
A manually initiated measurement is stopped with
START/STOP.
4.2.6 Display at End of Measurement
When the measurement is over, the following pa-
rameters are displayed: dose and time or dose per
pulse and number of pulses.
The dose rate indication depends on the measure-
ment type: with or without timer.
Without timer:
The displayed dose rate is zero.
With timer:
After the measurement, the average dose rate and
the timer interval (2 s/20 s) will be displayed. The
mean dose rate is the average calculated over the
last 2 s or 20 s of fluoroscopy; the last 3 s before
the radiation switches off are ignored.
NOTE
If the selected fluoroscopy time is too short and
the timer function is enabled, the following
readouts may be displayed after the measure-
ment:
both dose rate and measuring time are zero
dose rate and measuring time, the measuring
time is shorter than the timer interval. The
displayed measuring values blink (see sec-
tion 1.5.10).
