3. Description of the QABrowser
Real-time Display and Waveforms
Barracuda & QABrowser Reference Manual
2012-10/4.3A
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then starts the measurement and the Barracuda will
measure all radiation received during the
measurement time, without any trig levels. When the
time has passed, a reading will be presented.
· Free run, the Barracuda will continuously measure
the radiation without any trig levels.
Default value is set according to selected type of
measurement and this parameter normally never needs
to be manually changed, unless really low-level
measurements are to be accomplished. See the sections
Measurement Type Settings and Update Modes
for more information.
The QABrowser is able to show a total of 640 samples.
The sampling interval is normally 0.5 ms, giving a total
measurement window of 320 ms. By increasing the
sampling interval, a sampling window up to 40 seconds,
or even more, can however be selected. This is very
handy when longer exposure times are used and the
waveforms need to be viewed.
The available range is however higher for some slower
detectors, typically ion chambers, and also when "Very
high" sensitivity is chosen for EMM-BiasW. See section
Update Modes for more information. The default value
is set according to selected type of measurement, see
section Measurement Type Settings .
When this is selected, the waveform recoding will start
after the set delay. This can be useful if you want to study
a phenomenon that occurs after the normal waveform
recording time. When this is selected the electrometer
waveform will not show simultaneously and you will get a
warning that the irradiation time measurement is
inaccurate. The reason for this is that the Barracuda
needs the waveform from start to be able to accurately
calculate the irradiation time.
This is a temporary setting, and it will be turned off when
you exit the RTD.
Here general measurement settings for the MPD are
shown. You can find information about the different
parameters below.