User's Manual

PDM memory
The PDM has two dose data memories:
•
The accumulated dose memory, where the PDM stores accumulated dose
values every hour for the entire lifetime of the PDM.
• The dose rate memory, where the PDM stores dose rate samples. When
the radiation exceeds 40 µSv/h, the PDM stores one sample per
second. This memory is limited to 3600 second-samples.
When the dose rate memory is full, the oldest data will be overwritten with newer data.
Base Station memory
The Base Station stores dose information and PDM Info for PDMs that
have been connected to it.
As the Base Station does not have a limitation of 3600 s for the dose rate
memory, the information transmitted from the PDM will be more detailed.
When a PDM is connected to a Base Station, it continuously transmits its
measured dose exposures.
When the Base Station memory is full, the oldest data will be overwritten.
The capacity of the Base Station depends on the number of PDMs that have
been On-Line and the number of dose rate samples. Storage capacity example:
• 290 hours of dose exposure for 50 PDMs each.
Dose data transfer from PDM to Base Station
When a PDM gets within range of a Base Station, it will transfer data to the
Base Station (the accumulated dose values the PDM has collected since last
time it was within range). If a PDM is within range of a Base
Station when it is exposed to radiation, the PDM will also start sending dose
rate samples to the Base Station each second.
10.2
N O T E
10.3
N O T E
10.4
10.2 PDM memory
10-2
Technical data
DoseAware Base Station Package Document version 1.2
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