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IMI Rad 100 Operation Manual

Personal radiation detector
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2023/05/11 11:42:19
[100372_81375_RAD100 Manual 1.4-2:9:21.02_Cover.pdf]

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  • Page 1 2023/05/11 11:42:19 [100372_81375_RAD100 Manual 1.4-2:9:21.02_Cover.pdf]...
  • Page 3 2023/05/11 11:42:18 Personal Radiation Detector Operation Manual [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...
  • Page 4 Thank You for Purchasing this Instrument from IMI We trust it will provide you with many years of useful service. Please contact us if we can answer any questions or provide assistance in your radiation detection projects. Please remember to use caution when handling or working around radiation sources and radioactive materials.

  • Page 5: Table Of Contents

    2023/05/11 11:42:18 Contents 1 Introduction ................1 How the Rad 100 Detects Radiation ........1 Precautions ................2 2 Features ................3 The Display ................4 The Switches .................5 The Detector .................6 The Input/Output Ports ............6 3 Operation ................7 Units of Measurement ............7 Starting the Rad 100 ..............7 Operating in the Dose and Count Rate Modes .......7...
  • Page 6 [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...

  • Page 7: Introduction

    (mR/hr) is preferred you can easily convert units displayed in the Utility Menu. The count or dose rate displayed by the Rad 100 updates every 3 seconds and fluctuates due to the random nature of radioactivity. Use the Total mode feature on the instrument to get a highly accurate, unfluctuating reading by taking a measuremement for a longer timed period.

  • Page 8: Precautions

    • Do not put the Rad 100 in a microwave oven. It cannot measure microwaves, and you may damage it or the oven. • If you expect to not use the Rad 100 for longer than a few months, remove the battery to avoid damage from battery corrosion.

  • Page 9: Features

    The Rad 100 measures alpha, beta, gamma, and X-radiation. This chapter briefly describes the Rad 100's functions. For more information on how to use the Rad 100, see Chapter 3, “Operation.” The instrument counts ionizing events and displays the results on the liquid crystal display (LCD) (4).

  • Page 10: The Display

    • X1000 (E) appears when the radiation level is high. Multiply reading by 1,000 when this symbol is present. • AVG (F) appears when the Rad 100 is showing the average reading for a timed count. • CAL (G) appears while you are calibrating the Rad 100.

  • Page 11: The Switches

    2023/05/11 11:42:18 The Switches The Rad 100 has two switches on the front and three buttons on the end panel. Each switch has three settings, which are described below. Mode Switch (5) Dose Rate. The numeric display shows the current radiation level in the selected unit of measurement.

  • Page 12: The Detector

    Geiger tube has a thin disk of mica, which alpha radiation can penetrate, on its end. The screened opening at the top of the Rad 100 is called the alpha window (8). It allows alpha and low-energy beta and gamma radiation to penetrate the mica end of the tube.

  • Page 13: Operation

    To start the Rad 100, set the top switch to the mode you want, and set the bottom switch to On or Audio. The Rad 100 then does a brief system check, displaying all the indicators and numbers.

  • Page 14: Operating In Total/Timer Mode

    But over 12 hours, a one count increase over the 12-hour background average is statistically significant. The Rad 100 can give you a total count for a timed period of from one minute to 40 hours. Follow these steps: 1.
  • Page 15 40 hours. Follow these steps: 1. Place the Rad 100 in the location where you plan to take the count. 2. Note the time.

  • Page 16: Operating Ranges And Response Times

    The display shows RANGE:Full. The beeping pattern and the Range Full icon continue until the level decreases or the Rad 100 is turned off. Display Update and Response Time In Total/Timer mode, the numeric display is updated each second.
  • Page 17 >6000 CPM or >50 μSv/hr or >5 mR/ 3 seconds hr (>100 CPS) Note: You can set the response time to 3 seconds at all radiation levels using the Utility Menu; see “The Utility Menu” in this chapter. Rad 100 [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...

  • Page 18: The Utility Menu

    The Utility Menu allows you to change the default settings for several operating parameters. When a setting is changed, it remains in effect after the Rad 100 is turned off and until you change it again. • To activate the Utility Menu, hold down the + button on the end panel while you turn on the Rad 100.

  • Page 19: Interfacing To An External Device

    2023/05/11 11:42:18 Interfacing to an External Device The lower output jack on the left side of the Rad 100 is a dual miniature jack that provides an audible click for use with a headset, or a data output that can be used to drive external devices. You can use it to record the counts on a computer, data logger, or accumulating counter.

  • Page 20: Common Procedures

    To accurately interpret the readings you get on the Rad 100, it is a good idea to establish the normal back- ground radiation level for each area you plan to monitor. You can do this with a timed count.

  • Page 21: Environmental Area Monitoring

    Chapter 3. Environmental Area Monitoring You can keep the Rad 100 in Dose Rate or Count Rate mode whenever you want to monitor the ambient radiation, and look at it from time to time to check for elevated readings.

  • Page 22: Maintenance

    5 Maintenance The Rad 100 should be handled with care and can be calibrated as necessary to comply with regulations. Use the following guidelines to maintain the Rad 100 properly. Calibration The Rad 100’s readings typically remain stable for many years of use.
  • Page 23 Rad 100 and the source is correct to produce the appropriate dose rate. Follow these steps: 1. Start with the Rad 100 turned off and the Mode switch set to Dose Rate. 2. Hold down the – button on the end panel while you turn the On/ Off/Audio switch to On.
  • Page 24 3. Start with the Rad 100 turned off and the Mode switch set to Dose Rate. Hold down the – button on the end panel while you turn the On/Off/Audio switch to On. (Don’t use the Audio setting.) The display shows CAL, and the Rad 100 counts down for 15 seconds, chirping each second.

  • Page 25: Troubleshooting And Service

    2023/05/11 11:42:19 Troubleshooting and Service The Rad 100 is a highly reliable instrument. If it does not seem to be working properly, look through the following chart to see if you can identify the problem. Problem Possible Cause What to Check...
  • Page 26 International Medcom, Inc. for instructions on where to ship the instrument. Contact IMI at 707-823-0336 or at customercare@medcom.com. Do not attempt to repair the Rad 100; it contains no user-serviceable parts and you could void your warranty. CAUTION: Do not send a contaminated instrument for repair under any circumstances.

  • Page 27: Basics Of Radiation And Its Measurement

    This chapter briefly tells what radiation is and how it is measured. This information is provided for users who are not already familiar with the subject. It is helpful in understanding how the Rad 100 works and in interpreting your readings.
  • Page 28 (referred to as daughters or progeny). For example U-238 becomes Th-234, which becomes Pa-234, etc. Notice that the half-life of the radionuclides in the chain range from 164 microseconds to 4.5 billion years. Rad 100 [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...

  • Page 29: Measuring Radiation

    The amount of radiation is generally determined by measuring the resulting ionization. The Geiger tube used in the Rad 100 consists of an anode (positive electrode) positioned in the center of a tubular cathode (negative elec- trode) filled with a mixture of argon,...

  • Page 30: Radiation Measurement Units

    A becquerel (Bq) is equivalent to one disintegration per second. Higher Than Normal Readings Due to the random nature of radioactivity, the Rad 100 reading varies from minute to minute. Normal radiation levels in different locations can vary greatly due to soil composition, altitude, and other factors.
  • Page 31 If you have questions about your readings please contact IMI at 707-823-0336 or, customercare@medcom.com. Follow our blog at geigercounter.com and subscribe to our mailing list there to get the latest up-to-date information on radiation detection.

  • Page 32: Appendix: Technical Specifications

    Can set sampling periods of 1 minute to 40 hours Averaging Periods: Display updates every 3 seconds, showing the average for the past 90-second time period at nor- mal levels. The averaging period decreases as the radiation level increases. Rad 100 [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...
  • Page 33 EN 61326-1:2006 (Class B) RF Emissions Immunity: EN 61326-1:2006 (Annex C) Portable Test and Measurement Equipment; EN 61000-4- 2:1995 (ESD); EN 61000-4-3:1997 (EM) RoHS Compliant Meets WEEE standards Specifications subject to change without notice. Rad 100 [100372_RAD100 Manual_Inside Pages, Modified May 8 2023.pdf]...

  • Page 34: Limited Warranty

    The user is responsible for determining the suitability of this product for the intended application. The user assumes all risk and liability connected with such use, IMI is not responsible for incidental or consequential damages arising from the use of this instrument.

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