The RDM-1 Radiation Dose Meter
is designed to improve efficiency and quality of radiographic
operations by eliminating the need for re-shots. Re-shots are often
required if the radiographer mis-calculates the exposure. This can
occur if he is given the wrong pipe-wall thickness, or the pipe is
full of liquid for instance. With the RDM-1 the radiographer does
not need to know the wall thickness, what is in the pipe, or even
the source strength. He just watches the display until the dose
reaches the appropriate dose for the film type used. The detector
wand is placed beside, or just behind the film during the exposure
and the 100' or 150' cable is fed back to the display unit which is
monitored by the radiographer during the exposure. When the display
has reached the target exposure, he terminates the shot. This should
lead to perfect radiographs every time.
It is often not necessary to
use the RDM-1 for every exposure. It can be used at the start of a
job to determine typical exposure for each size of pipe.
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