Sy
clone Portable Gamma-Ray Spectrometer, Revision 10 5.0 MANUAL MODE
Ra
dComm – Proprietary Page 26 Revision Date: March 3, 2016
5.1 SEARCH
SEARCH MODE:
Select the menu item then ENTER to activate –
Figure as displayed.
SEARCH - Shows that the system is in the SEARCH
mode.
- battery icon displaying battery status.
N
o
te: The information shown below documents
examples taken from the figure above. The Syclone has threshold settings for Dose Rate, Counts
per Second (CPS), and Neutrons. “CPS Threshold” by default is OFF, in accordance with
parameters (see Appendix C
).
NE
UT – shows that measurement is for Neutrons. The example shows 0.5 CPS (Counts per
Second of neutrons detected).
ROI 1 – This is the Region of Interest (1) collected by the sodium iodide (NaI) detector.
169 CPS – this is the gamma radiation level in cps (counts per second) in the selected ROI, which
is ROI1 in this case. This level will always show some counts even if no apparent radioactive
material is present as this is the local radiation background of an area. Typically in low background
areas, 50-100cps is common. Resettable CPS radiation alarm thresholds are: OFF, 100, 200, 250,
300, 350, 400, 450, 500, 600, 700, 1K, 2K, 5K, 9Kcps.
DOSE RATE NaI – the numeric data shows the Dose Rate data in the selected units. The numeric
data shown above (169cps in the figure) is an essential tool to locate radioactive
material but the DOSE data gives the user an idea of the potential hazard level of such
material. Resettable Dose Rate radiation alarm thresholds are: OFF, 10, 20, 50, 100,
200, 500, 1000, 2000, 4000, 5000, 9000 µR/h (linked to units).
142 nSv/h – this is the current dose rate.
CHART DISPLAY – this is a chart recorder display of the radiation data. The bottom of the chart is
ZERO cps and the top of the scale (depends upon the scale setting). The display moves from left to
right so the LEFT hand data is the current data. The chart shows the last 256 samples and is a very
useful “view back” at the data making it very easy to see any significant radiation increases. Note
that the numeric cps data is not energy dependent so very small changes of any type of radioactive
material emitting gamma rays can be easily seen. This shows the region of interest (ROI 1) is
sampled between channels 0015CH to 0030CH.
ACC.DOSE - this shows the accumulated dose in nSv
5.1.1 HIGH DOSE
The system has a preset maximum Dose Rate level – normally set at 10µSv/h (1000µR/h).
Below this level Dose Rates are considered acceptable for system operation. However above
this level it is recommended that users move away from the source of radiation to reduce the
high Dose Rate to an acceptable level. To make things simple, the Syclone advises the
users automatically if the Dose Rate goes above the preset limit, “HIGH DOSE RATE. MOVE
AWAY!”
To Next Page
Loading...
Need help?
General
