7
Display
:
LCD dot matrix, back lighted
On board Memory:
1M Bytes flash memory for data storage
Power
:
Consumption
25mW
–
125mW (count rate dependant)
Power
:
Supply
3.7V Li-Ion battery / USB power
from mains or car DC adapter
Packing List:
1. GMC-320 Plus main unit.
2. USB cable
3. Quick start guide
4. Download link for SoftGeigerCounter software and USB driver for Windows
XP/Vista/Win7 32 and 64 bits (see Quick start guide)
How it works?
The GQ-320 Plus Geiger Counter installed a Geiger tube to detect radiation.
When the radiation pass through the Geiger tube, it triggers electrical pulses for the CPU to
register as count. The basic count rate unit is CPM(Count Per Minute). The CPM count rate
indicates the radiation level and it can be converted to a other traditional radiation units, such
as uSv/h or mR/h.
After GMC-320 turned on for one minute, it will show the background radiation reading. The
background radiation reading (in CPM) indicates the nature radiation detected at that minute.
This reading may change from time to time and location to location. To get accurate reading,
user may need to get an average value over a longer time period.
Caution
1. Avoid doing measurements when battery low.
2. Do not get the Geiger counter wet. Use sealed plastic bag to void wet.
2. Avoid doing measurements in direct sunlight.
3. Avoid directly contact the radioactive material. Use sealed plastic bag if needed.
4. Turn off the unit when not in use.
5. Keep it in a protective pouch after use.
-
Background Safe Levels
Suggested background readings levels:
1.
Safe level
. Less than 50CPM or 0.25uSv/h. Means no worry at all.
2.
Attention level
. 51CPM
–
99CPM. OR 0.26uSv/h
–
0.39uSv/h . Means you need to
find out why .
3.
Warning level.
More than 100CPM or more than 0.40uSv/h. Means do not stay in this
area for long period.
