SAIC Exploranium – GR-135 System Manual page: 28
FWHM - the Full-Width-Half-Maximum is a measurement of the quality of the detector to
resolve narrow peaks. The best detectors when new have a FWHM of 6 – 6.5%
but good operation is possible up to 8.5%. Above 8.5% the spectral peaks are
widening, making accurate peak analysis very difficult, and above 9.5%
spectral analysis, especially in the lower energy area, is almost impossible.
NEW GAIN - the Gain computed based on the error of the peak centroid calculation
OLD GAIN – the gain setting before the gain is corrected
System stabilization is now complete so the unit may be removed from the Docking-Station and
used. However if the user is not ready then the GR-135 may be left in the DS to keep the
batteries charged. This process also keeps the unit “warmed-up” as well as continuously
charging the batteries so when not in use it is recommended that the unit remains in the DS.
NOTE: In this software release – automatic stabilization in the DS in the MANUAL mode is NOT
supported
8.4 AUTOMATIC CORRECTION WHEN IN USE
When the unit is removed from the Docking-Station, the GR-135 electronics detects this change.
Stabilization on Cesium is automatically halted and the current detector temperature noted. As the
detector temperature changes, the system automatically corrects for any gain drifts using a built in
gain-correction Vs temperature curve so the Gain is maintained correctly.
To Next Page
Loading...