5. Measurements with the Barracuda System
Tube Current Probes
Barracuda & QABrowser Reference Manual
2012-10/4.3A
170
7. The figure to the left shows the result from
an exposure with 80 kV, 100 ms, and
25 mA. The exposure time is measured
with the MAS-2B probe.
If you would get a message as shown in the
figure to the left, the mAs probe is probably
connected in the wrong direction. Change
the direction of the mAs probe, press the
reset button on the mAs probe, tap Reset,
and make a new exposure.
Since the MAS-2B probe is based on measurement of magnetic flux, 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 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.
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