Passive Mas - Fluke Biomedical RaySafe Xi 8201011 User Manual

RaySafe Xi User Manual – mA/mAs Measurement

PASSIVE mAs

It is possible to measure mAs simultaneously with other measurements with an RaySafe Xi R/F or
mammography detector connected. The instrument will trig on radiation, not on the current in the RaySafe Xi
mAs cable. Any initial rush current will thus be excluded. The measured mAs value automatically appears in
MEASURE MODE on the display.
On some X-ray equipment the tube current does not drop below 25% of peak at the end of the exposure or the
generator give a second current pulse within 0.5 ms. The result is a long time measurement which gives a low
mA calculation. These situations are suitable for passive mAs. Follow the steps below to measure passive mAs:
1. Connect the R/F or MAM detector to the RaySafe Xi.
2. Connect the mAs cable to the RaySafe Xi base unit.
3. Connect the black and red banana plugs of the RaySafe Xi mAs cable to the mA/mAs port of the generator.
4. Place the R/F or MAM detector in the X-ray field.
5. Make the exposure.
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