5. Measurements with the Barracuda System
Tube Current Probes
2012-10/4.3A
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Barracuda & QABrowser Reference Manual
6. The real-time display for mAs is now
displayed. Set the generator. Tap Reset.
Make an exposure.
7. The figure to the left shows the result from
an exposure with 80 kV, 50 ms, and
100 mA. The exposure time is measured
with the electrometer module (EMM).
If you would get a message as shown in the
figure to the left, the current is floating in the
wrong direction in the mAs probe. Switch the
two connectors that are connected in the
mAs measuring socket, tap Reset and make
a new exposure.
Since the MAS-1B probe is connected in the X-ray generator false triggering may occur
due to electrical noise when the pre-heat is started and the anode starts to rotate. If
you get incorrect or inconsistent results try the following:
· First start anode rotation without firing the exposure.
· While the anode is rotating tap Reset or press the corresponding button. Make
the exposure when the reset procedure is finished.
8. Tap Wave to view that mA waveform.
The figure to the left shows the mA
waveform. You can use the cursor to
analyse the waveform and read the mA
value as well as estimate the exposure time.
The MAS-1B probe can also be used for measurement of tube current during
fluoroscopy.
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