S.E. International Radiation alert Monitor 1000 EC Operation Manual - page 9
9
Operating in Count Mode
A timed count is useful for determining the average counts per minute over a longer period of time. The
number of counts detected varies from minute to minute due to the random nature of radioactivity. When a
count is taken over a longer period, the average count per minute is more accurate.
Taking an average allows you to detect low-level contamination or differences in background radiation due
to altitude or soil mineral content. For example, if one 10-minute average is 1 count per minute higher than
another 10-minute average, the increase is likely due to normal variation. But over 12 hours, a 1 count per
minute increase over the 12 hour background average may be statistically significant.
How to Take a Timed Count
1. Press the count button
2. Using the menu button to switch between seconds, minutes, and hours, set the
time using the + and - buttons, to increase and decrease the time.
3. Once you set the count time, press the enter button (Figure 2(2)) to begin the timed count.
4. On the count screen, once the count has begun, a flashing hourglass will appear at
the top of the display and a star will appear next to the count down until the count is
completed. Once the count is completed the hour glass and star will disappear.
5. From the count screen, press the mode button to cycle through the various units of measure. If you want
to see the remaining time in the count, continue cycling through the units of measure until you return to
the count screen. If you have pressed the count button accidentally and do not wish to start a new timed
count, press the count button again to exit the set count time screen and return to the units of measure.
6. To stop the current count, press the count button, and press enter.
Using Dose/Rate Modes While The Timer is On
Dose/rate modes can be used while the timer is on. In any dose/rate mode, the hour glass indicator will
continue to flash during a timed count. At the end of the timed period, the hour glass will remain solid, and the
Monitor 1000
EC
will beep 3 times.
Menu
The Menu allows the user to change the default settings for several operating parameters. Once a setting is
changed, it remains in effect unless it is changed through the Utility Menu, the USB Observer Software, or by
restoring the default settings.
1. To activate the Menu, press the menu button. The display will show the menu options.
2. Scroll through the menu by pushing the + or - buttons.
3. To select an option, push the enter button.
4. Use the + or - buttons to toggle between choices and press the enter button to select
the new value. To adjust another menu option, repeat the above steps.
5. To exit the Utility Menu at any time, press the menu button again. Normal operation will continue.