BNC SAM 935 Portable Gamma Spectroscopy System - Manual (Page 35)

SAM 935™ Instruction Manual 31
The Surveillance screen when alarms have been triggered looks something like this:
The function keys on the Surveillance monitoring display are:
• C ALIB (F2) performs the quick, one-button calibration adjustment that is described in Section 4.2.1
and in the Quick Reference.
• C APTURE (F3) saves the currently displayed reading. The current alarm will be terminated when
you press C APTURE . If the condition continues to alarm, a new alarm will be created and you will
again have the choice to capture it or not.
• S ILENCE (F4) turns off the audible alarm. If there are no alarms currently going on, then the F4
F unction key becomes A LM T EST . Pressing A LM T EST will activate the alarm indicators for test pur-
poses; each press of the A LM T EST key will cause the alarm indicators to turn on for 5 seconds.
• When in the alarm review mode, the F2, F3, and F4 function keys become R ETURN , P RN S EL , and
MCA, respectively. These functions are described above in Section 4.5.
5.2 The Monitor Mode of Operation
The primary element of the monitor mode display is the alarm meter. This “graphics equalizer” type of bar
graph shows a continuous readout of the signal strength associated with each trigger being monitored.
The display is drawn in terms of sigma’s above background.
For each trigger, a dashed line shows the alarm threshold for that trigger. When an alarm occurs, the word
Alarm and the alarm value will be displayed next to the bar graph. Once an alarm has occurred, the word
Alarmed will flash at the top center of the screen with the number of stored alarms immediately below it.
The time of the alarm will be displayed in the message line immediately below the bar graphs.
The order in which the bar graphs are presented changes with every measurement interval: the most
intense alarm measured during the interval is presented first; least intense is shown last.
The function keys on the main monitor display are:
• D ETAIL (F1) switches to the Detail mode, if it is enabled. This mode is described in the next section.
• C ALIB (F2) performs the quick, one-button calibration adjustment that is described in Section 4.2.1
and in the Quick Reference.