2.2.3.11 ALARM DISPLAY
When the survey meter has detected radiation above the alarm levels that were set,
an audible and a flashing visual alarm are produced. Alarm levels for accumulated
Dose and for Dose Rate are independently detected. The display shows the type of
alarm, which can be:
R = RATE ALARM
D = DOSE ALARM
B = BOTH RATE & DOSE ALARMS
The audible alarm will not sound if the Audio function is disabled.
Note: Alarm indicators will flash and continue to be displayed until the alarm
condition disappears and the alarm is acknowledged by the operator pressing any
button (except power).
2.2.3.12 SURVEY MODE
The ADM300 survey meter can be used to make multiple survey entries and view
these entries later or down load them to a computer using the ADMCOM software
package. The survey mode is only available with the ADM300 alone or when it has
an external probe that reads in dose rate not count rate. For example, the external
gamma probe and neutron probe have survey mode available. In the Survey mode,
the ADM300 measures the average dose rate. The period over which the average is
measured is determined by an algorithm that will automatically terminate when
sufficient data has been accumulated for a statistically accurate reading of ± 10%
accuracy at a 99% confidence level, 660 counts. This feature allows for accurate
readings, while minimizing exposure to the operator.
The Survey mode is menu driven from the bottom line of the ADM300 display. The
Survey mode is entered by pressing and releasing the MODE switch until the
display indicates "To enter Survey Push → SET." Press the SET button to enter the
Survey mode. The ADM300 now asks the user to select the TAKE_Survey option
by pressing SET or to select the SHOW_Survey option by pressing the INC (up
arrow) button.
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