March 2005 International Medcom 707-823-0336 How to Use the Inspector

March 2005March 2005 International Medcom 707-823-0336International Medcom 707-823-0336www.medcom.comwww.medcom.com

How to Use the InspectorHow to Use the Inspector


This presentation is intended to give the user a brief overview of how to operate the Inspector. For a complete understanding of this instrument please refer to the operating manual.


What the Inspector DoesWhat the Inspector Does The Inspector measures the The Inspector measures the

rate of the following types of rate of the following types of nuclear radiationnuclear radiation AlphaAlpha BetaBeta GammaGamma X-radiationX-radiation

The Inspector measures the The Inspector measures the amount of nuclear radiation in amount of nuclear radiation in Counts per minute (CPM) Counts per minute (CPM) Counts per second (CPS)Counts per second (CPS) MilliRoentgens per hour MilliRoentgens per hour

(mR/hr)(mR/hr) MicroSeiverts per hour MicroSeiverts per hour ((µµSv/hr)Sv/hr)


How to Turn On the InspectorHow to Turn On the Inspector Turn the Inspector on by moving Turn the Inspector on by moving

the lower switch from the lower switch from Off to to On or or Audio..

On--The Inspector is measuring --The Inspector is measuring radiation but there is no audio.radiation but there is no audio.

Audio--The Inspector is --The Inspector is measuring radiation, and beeping measuring radiation, and beeping with each count of radiation that is with each count of radiation that is detected. detected.

When the Inspector is first turned When the Inspector is first turned on it does a 3 second system on it does a 3 second system check, displaying all the indicators check, displaying all the indicators and numbers.and numbers.

After the system check is finished After the system check is finished the Inspector shows the current the Inspector shows the current level of nuclear radiation.level of nuclear radiation.

The Inspector updates its visual The Inspector updates its visual display once every three seconds.display once every three seconds.


How to Select the Operating ModeHow to Select the Operating Mode

Move the upper switch toMove the upper switch to Total/Timer CPM/CPS (counts per minute (counts per minute

or counts per second) or counts per second) mR/hr or or µSv/hr

(milliRoentgen per hour or (milliRoentgen per hour or microSeivert per hour).microSeivert per hour).

In In Total mode the Inspector mode the Inspector starts totaling the counts it starts totaling the counts it registers, and the numeric registers, and the numeric display is updated each time a display is updated each time a count is registered.count is registered.

The The CPM mode is the easiest mode is the easiest to understand for the to understand for the layperson.layperson.


How to Switch the ModeHow to Switch the Mode To switch the mode from To switch the mode from

mR/hr to to µSv/hr and and from from CPM to to CPS:: Turn the Inspector off.Turn the Inspector off. Hold down the Hold down the + button on button on

the end panel while turning the end panel while turning the Inspector on.the Inspector on.

Scroll through the numbers Scroll through the numbers on the screen until you get on the screen until you get to to 2..

Press the Press the CAL button on button on the end panel.the end panel.

Use the Use the + or or - button on the button on the end panel to toggle end panel to toggle between settings.between settings.


What is Background Count?What is Background Count? The background count is the normal The background count is the normal

level of nuclear radiation that is level of nuclear radiation that is occurring at a given time and place. occurring at a given time and place.

Some sources of background radiation Some sources of background radiation are:are:

The sunThe sun Minerals in the earthMinerals in the earth Residual radiation from nuclear testing Residual radiation from nuclear testing

and other man made sourcesand other man made sources Nuclear radiation is a naturally Nuclear radiation is a naturally

occurring phenomenon. When the occurring phenomenon. When the Inspector is on it is normally measuring Inspector is on it is normally measuring the background count.the background count.

A user should determine the normal A user should determine the normal background count in case abnormal background count in case abnormal levels of nuclear radiation occur.levels of nuclear radiation occur.

The mesh screen covers the end window of the Geiger-Mueller sensor.


How to Determine the Average How to Determine the Average Background CountBackground Count

Turn the Inspector Turn the Inspector On, and put it , and put it in Total mode. in Total mode.

Set the Set the Timer switch on the end switch on the end panel to panel to Set..

Press the Press the + button until the display button until the display reads 00:10 (this means ten reads 00:10 (this means ten minutes).minutes).

Set the Set the Timer switch to switch to On. The . The Inspector beeps three times and Inspector beeps three times and starts counting.starts counting.

At the end of the ten minutes, the At the end of the ten minutes, the Inspector beeps three times, and Inspector beeps three times, and repeats beeping several times. repeats beeping several times. Note the total reading.Note the total reading.

Divide this number by ten for the Divide this number by ten for the average count per minute which is average count per minute which is the average background count per the average background count per minute.minute.


How to Change the BatteryHow to Change the Battery Turn the Inspector over.Turn the Inspector over. Remove the battery cover.Remove the battery cover. Detach the 9 volt battery from the wire connector and replace.Detach the 9 volt battery from the wire connector and replace. The battery life for the Inspector is approximately 200 hours.The battery life for the Inspector is approximately 200 hours.

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March 2005 International Medcom 707-823-0336 How to Use the Inspector