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Manual Collimator
The Collimator can rotate ± 90° on its vertical axis while the X-ray tube
remains in the same position. This movement is performed by manually
turning the collimator and has detents every 90°.
1
2
3
4
5
Filter indicator
1.
Filter selection wheel
2.
Knobs to adjust the internal blades
3.
The table on the front panel shows the number to set with the knobs for
each combination of SID and image size.
Button to switch on the light field.
4.
After pressing the button, the lamp remains lit for a few seconds before
automatically switching off.
Measurement tape to measure the distance between the focal spot of X-ray
5.
tube and the tabletop
Figure 54: Ralco 221 collimator controls
Another button to switch on the light field is available on the RAD Wall Stand.
Related Links
RAD Wall Stand
Dose Area Product Meter (DAP)
An optional radiation meter can be installed under the manual collimator and
reads the radiation as Dose Area Product in [µGy x m
The measured radiation value is transferred to the X-ray generator console
and the Software Console automatically and displayed after each exposure.
The DAP meter can be removed from the rail system to be cleaned or serviced.
To remove the radiation meter:
1. Disconnect the cable of the radiation meter.
on page 96
DR 400 | Operation | 123
2
].
3231A EN 20150710 1114
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