S.E. International Radiation alert Monitor 1000 EC Operation Manual - page 7
7
Chapter 3: Operation
Starting The Monitor 1000
EC
Before starting the Monitor 1000
EC
, install 2 AA alkaline batteries in the battery compartment located in the
lower rear of the enclosure. You will need to remove the protective boot to gain access. CAUTION: Be sure not
to press on the window of the GM tube while removing the boot.
The power button is located in the center of the circular buttons on the front. To turn the Monitor 1000
EC
on, press and hold the power button until you hear a beep. The Monitor 1000
EC
then begins a system check,
displaying the serial number and firmware version. After the system check, the radiation level is displayed in
the previously selected mode. Approximately 30 seconds after start up, a short beep indicates that enough
information has been collected to ensure statistical accuracy.
If you plan on using the data logging feature, please be sure to set the correct local time and date with the
Observer USB Software prior to activating the data logging. See Chapter 6: Observer USB Software.
Units of Measurement
The Monitor 1000
EC
is designed for the use of conventional measurement units; counts per minute (CPM),
microroentgens per hour (µR/hr), milliroentgens per hour (mR/hr), counts per second (CPS), microsieverts
per hour (µSv/hr), and counts, which are used when taking a timed count. To switch between units, press the
mode button.
Display Update
In the dose, rate, and count modes, the numeric display is updated every second.
Maximum level
When the maximum level for the current mode is reached, the Monitor 1000
EC
beeps for 3 seconds, pauses
for 3 seconds, and repeats. The numerical values displayed will show OVER instead of the specific rate. The
beeping pattern and the flashing display continue until the level decreases or the instrument is turned off.
Response Time (Autoaveraging)
When the radiation level is less than 6,000 CPM, the reading in any of the dose rate modes is based on the
radiation detected in the previous 30 seconds. In order to give a quicker response to changes, when the
radiation level exceeds 6,000 CPM in any 30-second period, the reading is based on the previous 6 seconds.
When the radiation level exceeds 12,000 CPM in any 30-second period, the reading is based on the previous
3 seconds. Note: Though Auto-Averaging is on by default, you can choose the fast response mode at any
radiation level in the menu.
After 30 second start-up
The reading will be based
if instrument is detecting
on an average of the previous
(<100 CPS)
30 seconds
<6000 CPM or <1.75 mR/hr
(100 -200 CPS)
6 seconds
6000-12,000 CPM or 1.75-3.6 mR/hr
(>200 CPS)
3 seconds
>12.000 CPM > 3.6 mR/hr