User manual

Radiation Measurement

Indicating Current Radiation

• PressingthebuttonputsGAMMA-SCOUT

into standard mode, and its display shows you the

present radiation in microsievert per hour - not only as a value, but also in the form of a bar chart.

Note that for a small radiation value, this bar chart appears only as a single line. In order to visualize

the volume of detected radiation, there is a bar diagram on the ground line of the display using

symbols as >1a (stay for more than 1 year), <1m (less than 1 month for accumulation), etc.

• ToswitchfrommSvtomRemandback,startfrommode“measureradiation.”Pressbutton

andconrmunitwithbutton.Alldatawillbedisplayedintheselectedunit.

Indicating Average Over the Past Day (12:00 am to 12:00 am)

• Pressingthebuttonasecondtimedisplaystheaverageradiationoverthelastday(midnight

to midnight - taken from the GAMMA-SCOUT

clock) for a few seconds, again in microsievert per

hour. The H symbol in the display will blink. Note that this function is not available for up to 48 hours

afterrstoperatingthedevice,orafterareset.

Automatic Alert Level (w/ALERT version)

• Whenexceedingtheuserprogrammedalertlevel,GAMMA-SCOUT

generates an acoustic alert

and displays the blinking icon . This icon continues blinking until the user shuts it off by pressing

the button twice.

What Does a “Microsievert” Mean?

In physics, three types of radioactive radiation are known: alpha, beta and gamma radiation. They differ, not only

in their physical characteristics, but also in their effects on humans. To make these three radiation types com-

parableintheireffectsonhumans,avaluehasbeencreatedwhichdenesthebiologicaleffectsofradiation:itis

referred to as dose equivalent whose unit is the sievert (called equivalent dose). The older unit was called REM.

1 REM = 0.01 Sievert (Sv). Based on the counted radiation pulses, the different components of a radiation mix

areconvertedintoacommonmeasureforthebiologicaleffect.Toreectthis,Cs-137isused.Conversionintothe

dose equivalent refers to the gamma quantum of the Cs-137, radionuclide with quantum energy of 662 keV. The

conversion takes place due to physical reasons with different factors dependent upon the amount of impulses per

time;intheenvironmentaleld,thefactor142impulsesperminute=1.0Microsievertperhour.