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January 2012International Medcom, Inc. 707-823-0336 www.medcom.com How to Use the Radalert 100.

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Presentation on theme: "January 2012International Medcom, Inc. 707-823-0336 www.medcom.com How to Use the Radalert 100."— Presentation transcript:

1 January 2012International Medcom, Inc How to Use the Radalert 100

2 January 2012International Medcom, Inc This presentation is intended to give the user a brief overview of how to operate the Radalert 100. For a complete understanding of this instrument please refer to the operating manual.

3 January 2012International Medcom, Inc What the Radalert 100 Does The Radalert 100 measures the rate of the following types of nuclear radiation The Radalert 100 measures the rate of the following types of nuclear radiation Alpha Alpha Beta Beta Gamma Gamma X-radiation X-radiation The Radalert 100 measures the amount of radiation in The Radalert 100 measures the amount of radiation in Counts per minute (CPM & CPS) or Counts per minute (CPM & CPS) or MilliRoentgens per hour (mR/hr) or MicroSieverts per hour (µSv/hr). MilliRoentgens per hour (mR/hr) or MicroSieverts per hour (µSv/hr). The Radalert 100 can audibly alert the user when a pre-determined level of nuclear radiation occurs. The Radalert 100 can audibly alert the user when a pre-determined level of nuclear radiation occurs.

4 January 2012International Medcom, Inc How to Turn On Radalert 100 Turn the Radalert 100 on by moving the lower switch from to or. Turn the Radalert 100 on by moving the lower switch from Off to On or Audio. --The Radalert 100 is measuring radiation but there is no audio. On--The Radalert 100 is measuring radiation but there is no audio. --The Radalert 100 is measuring radiation, and beeping with each count of radiation that is detected. Audio--The Radalert 100 is measuring radiation, and beeping with each count of radiation that is detected. When the Radalert 100 is first turned on it does a 3 second system check, displaying all the indicators and numbers. When the Radalert 100 is first turned on it does a 3 second system check, displaying all the indicators and numbers. After the system check is finished the Radalert 100 shows the current radiation level. After the system check is finished the Radalert 100 shows the current radiation level.

5 January 2012International Medcom, Inc How to Select the Operating Mode Move the upper switch to Move the upper switch to Total / Timer (counts per minute or counts per second). CPM / CPS (counts per minute or counts per second). or (milliRoentgen per hour or microSievert per hour). mR/hr or µSv/hr (milliRoentgen per hour or microSievert per hour). In mode the Radalert 100 starts totaling the counts it registers, and updates the numeric display each time it registers a count. In Total / Timer mode the Radalert 100 starts totaling the counts it registers, and updates the numeric display each time it registers a count. In the and modes the numeric display is updated every three-seconds. In the CPM / CPS and mR/hr / µSv/hr modes the numeric display is updated every three-seconds. The mode is the easiest to understand. The CPM / CPS mode is the easiest to understand.

6 January 2012International Medcom, Inc How to Switch the Mode in the Utility Menu To switch the mode from to and from to : To switch the mode from mR/hr to µSv/hr and from CPM to CPS: Turn the Radalert 100 off. Turn the Radalert 100 off. Hold down the button on the end panel while turning the Radalert 100 on. The icon will appear at the lower right corner. Hold down the + button on the end panel while turning the Radalert 100 on. The menu icon will appear at the lower right corner. Scroll through the numbers on the screen by pushing the and buttons until you get to. Scroll through the numbers on the screen by pushing the + and - buttons until you get to 2. Press the button on the end panel. Press for and for Press the SET button on the end panel. Press + for mR/hr (CPM) and - for µSv/hr (CPS). button twice. Press the SET button twice.

7 January 2012International Medcom, Inc What is Background Count? The background count is the normal level of nuclear radiation that is occurring at a given time and place. The background count is the normal level of nuclear radiation that is occurring at a given time and place. Some sources of background radiation are: Some sources of background radiation are: The sun The sun Minerals in the earth Minerals in the earth Residual radiation from nuclear testing and other man made sources Residual radiation from nuclear testing and other man made sources Nuclear radiation is a naturally occurring phenomenon. When the Radalert 100 is on it is normally measuring the background count. Nuclear radiation is a naturally occurring phenomenon. When the Radalert 100 is on it is normally measuring the background count. A user should determine the normal background count to be able to set the appropriate alarm level in the case of abnormal levels of nuclear radiation. A user should determine the normal background count to be able to set the appropriate alarm level in the case of abnormal levels of nuclear radiation. The mesh screen covers the end window of the Geiger-Mueller sensor.

8 January 2012International Medcom, Inc How to Determine the Average Background Count Turn the Radalert 100 on, and put it in mode. Turn the Radalert 100 on, and put it in CPM / CPS mode. Wait one minute until the hourglass icon on the left side of the screen disappears. After this icon disappears the Radalert 100 updates every three-seconds. Wait one minute until the hourglass icon on the left side of the screen disappears. After this icon disappears the Radalert 100 updates every three-seconds. Take 30 consecutive minute readings and record each of the readings. Take 30 consecutive minute readings and record each of the readings. Add together each of the readings and divide this number by 30 (the length of your timed count). Add together each of the readings and divide this number by 30 (the length of your timed count). This number is the average background count. This number is the average background count.

9 January 2012International Medcom, Inc Considerations Involved in Finding the Best Level to Set the Alert The ideal alert setting provides enough sensitivity to detect any increase in the radiation level above naturally occurring background levels without false alarms caused by normal random variations in the background radiation level. The ideal alert setting provides enough sensitivity to detect any increase in the radiation level above naturally occurring background levels without false alarms caused by normal random variations in the background radiation level. A good setting for one location may cause alerts in another location since background radiation levels can vary due to A good setting for one location may cause alerts in another location since background radiation levels can vary due to altitude altitude geography geography radon gas radon gas radioactive materials in buildings radioactive materials in buildings mineral content in soil and rocks mineral content in soil and rocks Each user should balance the need for sensitivity against false alarms occurring from local geography and conditions. Each user should balance the need for sensitivity against false alarms occurring from local geography and conditions. A good alert level can be developed experimentally or through the formula found on the next slide. A good alert level can be developed experimentally or through the formula found on the next slide. Use this number and adjust it as necessary for local conditions. Use this number and adjust it as necessary for local conditions.

10 January 2012International Medcom, Inc One Way to Determine Where to Set the Alert Use the Radalert 100 in mode to measure counts for 30 consecutive minutes. Use the Radalert 100 in CPM / CPS mode to measure counts for 30 consecutive minutes. Record each reading. Record each reading. Add the readings and divide the sum by 30. Add the readings and divide the sum by 30. Find the difference between each reading and the average. Find the difference between each reading and the average. Square each of these differences (multiply it by itself). Square each of these differences (multiply it by itself). Total the squares of the differences and divide the sum by 29. Total the squares of the differences and divide the sum by 29. Find the square root of this sum. This number is the standard deviation. Find the square root of this sum. This number is the standard deviation. Multiply the standard deviation by 4 and add this number to the average from step 3 above. Set the alert level to this number. Multiply the standard deviation by 4 and add this number to the average from step 3 above. Set the alert level to this number.

11 January 2012International Medcom, Inc How to Set the Alert Put the Radalert 100 in mode. Put the Radalert 100 in CPM / CPS mode. Press the button on the end panel. A nuclear radiation icon will appear on the left side of the screen. Press the Set button on the end panel. A nuclear radiation icon will appear on the left side of the screen. Use the or buttons to set the alert level to the desired setting. Use the + or - buttons to set the alert level to the desired setting. Press the button twice. The nuclear icon remains on. This icon means that the alert is set. Press the Set button twice. The nuclear icon remains on. This icon means that the alert is set. Each time you turn the Radalert 100 on you will have to turn on the alert feature, but the setting will remain the same. Each time you turn the Radalert 100 on you will have to turn on the alert feature, but the setting will remain the same.

12 January 2012International Medcom, Inc How to Change the Battery Turn the Radalert 100 over. Turn the Radalert 100 over. Remove the battery cover. Remove the battery cover. Detach the 9 volt alkaline battery from the wire connector and replace. Detach the 9 volt alkaline battery from the wire connector and replace. The battery life for the Radalert 100 is approximately 2,160 hours at normal background, average 625 hours at 1 mR/hr with beeper off. The battery life for the Radalert 100 is approximately 2,160 hours at normal background, average 625 hours at 1 mR/hr with beeper off.


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