Activity Optimized Source (AOS) for mould measurement0 pages

AOS - Activity Optimized Source
The Activity Optimized Source AOS is used for the measurement of mould
level. The advanced source permits a significant increase of accuracy in the
upper part of the measuring range – where the improved accuracy has
very positive effects on the steel quality. The optimized activity distribution
accomplishes these enhancements without increasing the total source
size at all.
Alternatively, when the accuracy is to remain unchanged, the source
activity can be reduced by several factors. Especially when installed on
small moulds, the AOS is highly efficient in terms of shielding costs and
radiation protection matters.
Photo: SMS Siemag AG
2 Spans for Outstanding Measurement Performance
The bottom measuring range is
characterized by a significantly
reduced source activity. The AOS
provides sufficient counts for a
reliable measurement during the
start of casting.
10.000
Count rate [cps]
Standard
Source
AOS
In the upper measuring range, the
AOS produces a measuring signal,
which is usually only achieved with
much higher source activities. This
characteristic results in an increased
resolution and a considerably improved measuring accuracy. Most
of all, the effect of count rate
fluctuations on the measurement is
drastically reduced – the signal is
now measurably calmer.
Count rate variations
resulting variations
in the level signal
0
50
Level [%]
100