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2.5 A bandwidth is another important feature apart from its shape and
direction, since it displays the error in measurement. Considering the level of
accuracy you want to obtain, please wait until the band reaches an acceptable
width. You can observe numeric values of maximum and minimum specific
activity at the moment of measurement along with its graphic display in order to
evaluate the bandwidth. Figure 2.16 shows that if the current numeric value is
+
Bq/kg, the right end of the band's lower edge is at the level of
31
267
−
31
267-31=236 Bq/kg, while the right end of the band's upper edge is at the level of
267+31=298 Bq/kg.
Figure 2.15 – Stable trend band
35
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