SE Inspector Monitor 4, Monitor 4EC, and MC1K
Contents
1. We offer a continuing calibration service Your instrument can be entered into our Calibration Database At specified intervals you will be sent a notice reminding you of the upcoming calibration date Included in this manual is a Calibration Database Application Please send it to the address below and we will enter you in the database free of charge TECHNICAL SERVICE Should this instrument ever need servicing or calibration please contact the address below or your local distributor DO NOT SEND CONTAMINATED INSTRUMENTS FOR REPAIR OR CALIBRATION UNDER ANY CIRCUMSTANCES S E INTERNATIONAL INC P O Box 39 436 Farm Road Summertown TN 38483 0039 USA Tel 931 964 3561 Fax 931 964 3564 radiationinfo seintl com ADDITIONAL INFORMATION FOR THE NEWCOMER TO RADIATION PROTECTION Since our instruments are sometimes purchased by individuals with no background in radiation protection we thought it would be helpful to include this information MEASURING RADIATION The Monitor 4 and Monitor 4EC detect the four main types of ionizing radiation alpha beta gamma and x rays The MC1K detects gamma and x rays They are calibrated to Cesium 137 but also serve as an excellent indicator for many other sources of ionizing radiation Gamma and x rays are measured in milli Roentgens per hour mR hr micro Sieverts uSv hr or milli Sieverts mSv hr Alpha and beta are measured in counts per minute CPM or counts per second CPS The positio2. in the dark Tritium is now commonly used to obtain the same effect Tritium is also radioactive but emits low energy radiation which cannot penetrate the lens of the timepiece JEWELRY Some gold used to encapsulate radium and radon for medical purposes was improperly reprocessed and 4 entered the market as radioactive rings and other types of gold jewelry Some imported cloisonne being glazed with uranium oxide exceeds U S limits Some gems are irradiated by an electron beam or in an accelerator to enhance their color Irradiated gems typically are held until there is no residual activity remaining ROCK COLLECTIONS Many natural formations contain radioactive materials Hobbyists who collect such things should vent the rooms in which these items are stored and be careful to avoid inhaling the fine dust particles from these samples POTTERY Some types of pottery is glazed with uranium oxide To the best of our knowledge this process has been discontinued although some of these pieces are still in circulation GLOSSARY ALPHA Positively charged particles emitted from the nucleus of an atom Alpha particles are relatively large and very heavy Due to this strong charge and large mass an alpha particle cannot penetrate far into any material A sheet of paper or an inch of air can usually stop most alpha particles BACKGROUND RADIATION Naturally occurring radiation is always present it includes high energy gamma rays from the sun and
3. of particles or waves ROENTGEN rent gen A basic unit of measurement of the ionization produced in air by gamma or x rays One Roentgen R is exposure to gamma or x rays that will produce one electrostatic unit of charge in one cubic centimeter of dry air One thousand milliroentgen 1 000 mR 1R RADIOISOTOPE A natural occurring or artificially produced radioactive form of an element SIEVERT A unit of dose equivalent 1 Sv 100 roentgens 10 uSv hr 1 milliroentgen hr uSv micro Sievert micro is one millionth milli is one thousandth X RAYS Electromagnetic radiation photons of higher frequency and energy than visible and ultraviolet light usually produced by bombarding a metallic target with high speed electrons in a vacuum X rays are photons emitted by interactions involving orbital electrons rather than atomic nuclei X rays and gamma rays have the same basic characteristics The only difference between them is their source of origin SPECIFICATIONS MONITOR 4 and 4EC Detector for the MONITOR 4 and the MONITOR 4EC MONITOR 4 Halogen quenched uncompensated GM tube Thin mica window is 1 5 2 0 mg cm2 thick Approx 1000 CPM mR hr for Cesium 137 MONITOR 4EC Halogen quenched GM tube Energy compensated sidewall with 2 mm tin filter Thin mica window 1 5 2 0 mg cm2 thick Approx 1000 CPM mR hr for Cesium 137 Energy compensation is only effective through the sidewall of the GM refer illustration 1 MONITOR 4 Energy Sensitivi
4. outer space and alpha beta and gamma radiation emitted from elements in the earth BETA PARTICLES Negatively charged particles emitted from an atom Beta particles have a mass and charge equal to that of an electron They are very light particles about 2 000 times less mass than a proton and have a charge of 1 Because of their light mass and single charge beta particles can penetrate more deeply than alpha particles A few millimeters of aluminum will stop most beta particles Bq Becquerels A quantity of radioactivity in which one atom is transformed per second 1 dps one disintegration per second CPM counts per minute The unit of measurement usually used to measure alpha and beta radiation GAMMA RAYS Short wavelength electromagnetic radiation higher in frequency and energy than visible and ultraviolet light Gamma rays are emitted from the nucleus of an atom These high energy photons are much more penetrating than alpha and beta particles ION An atomic particle atom or molecule that has acquired an electrical charge either positive or negative by gaining or losing electrons IONIZATION The process by which neutral atoms of molecules are divided into pairs of oppositely charged particles known as ions IONIZING RADIATION Radiation capable of producing ionization by breaking up atoms or molecules into charged particles called ions RADIATION The emission and propagation of energy through space or through matter in the form
5. 4 amp 4EC amp MC1K z OPERATION X CE Roh Made In USA Same Monitor 4 New ergonomic design The M4 and M4EC are compact general purpose survey meters capable of detecting alpha beta gamma and x rays over 3 selectable ranges A red count light flashes and a beep sounds with each event detected The Monitor 4EC offers a more linear reading for gamma and x rays above 40 keV a7 RADIATION bead Bele EeReT QUALITY HANDHELD DETECTORS OPERATION MANUAL FOR THE MONITOR 4 MONITOR 4EC AND MC1K Before using this instrument the user must determine the suitability of the product for his or her intended use The user assumes all risk and liability connected with such use TABLE OF CONTENTS PAGE DESCRIPTION vesccssccsinaces sicriceseeceeeielite ae A ARER tie este deci ga 2 OPERATION ssceccisciscscstcszixecassavecctnsveslonscetsteseccececseatteosssdhenecesdeh aanina a a 2 PRECAUTIONS tie sccee dee ies aiicnedet adnate kiiidid anette Levene ET E E ERE 2 MAKING MEASUREMENT S sssscccccesestsccosecsstalssesdecennttaccotisauussinnostecotanace A RRR E ERRATA 2 CALIBRA MON irens aspnon n aaner NOn RENER SEA E RN 3 CALIBRATION SERVIC E snsszireuaunenineniiuei heana aaa aaa 3 TEGHNICAL SERVIC Eisstadion aaen 4 ADDITIONAL INFORMATION FOR THE NEWCOMER TO RADIATION PROTECTION 4 MEASURING RADIATION sssc sstedee aitictatiie tes neice ERNEA ARAETA 5 BRIEF OVERVIEW cssccesstestessstesstsssssnacssetescstedhcstentessctecstavbesssttes
6. 7 grams 8 7 oz without battery MC1K 235 7 grams 8 3 oz without battery Outputs 1 8 inch headphone jack with 5 volt pulse out Size 210 x 70 x 48 mm 8 25 x 2 75 x 1 875 in Includes 1 year limited warranty and carrying case Options USB Output option Observer Software Fy Radiation Ment Dhrerves Ob S ft Fie Mit ven Smi u Ha server o ware Banri Estro a erei F scrol 20 aio peasan E ane G ope ops J Count for cep zj mafi C cs fioo G continous Dwell tosses a The Observer software runs on a Windows platform and can be used with the Inspector Inspector Inspector EXP Digilert 50 Digilert 100 and Geiger Radiation Monitors The Observer reads in Counts CPM and CPS and has the ability to collect log and perform statistical analysis on the data received The data is displayed on a graph as well waa maa man aa osaan On lc as digital and analog on screen meters and can be saved or printed in E Cacti I various ways including a spreadsheet format The dwell count time can lt Pea Po a a be adjusted for each point on the graph You can also set the length of 2 eo time for the count The on screen meters in the software have adjustable fet Cia Con C000 7 icoon settings as well as a selectable alarm in CPM There are both visual and audio indicators and you can play the meter click through your PC speakers LIMITED WARRAN
7. ESPONSE Graph 2 Relative to Cs 137 Detector for the MC1K Energy compensated halogen quenched GM tube no window MC1K Energy Sensitivity Detects gamma and x rays down to 40 keV Response is flat from 40 keV up Normal background avg 4 CPM counts per minute Range Switch for the MC1K X1 X10 X100 X1000 0 Operating Range MC1K RELATIVE COUNTRATE 10 107 10 104 PHOTON ENERGY keV X1 position in 05 increments 0 to 1 mR hr or 0 to 01 mSv hr milli Sievert per hour X10 position in 5 increments 0 to 10 mR hr or 0 to 1 mSv hr X100 position 5 0 to 100 mR hr or O to 1 mSv hr X1000 position 50 0 to 1000 mR hr 1R or 0 to 10 mSv hr COMMON SPECIFICATIONS FOR THE MONITOR 4 MONITOR 4EC AND MC1K Accuracy Typically 15 of reading referenced to Cs 137 Audio Built in piezoelectric transducer gives audible beep when switch is in the AUDIO position Can be switched off for silent operation Anti Saturation Meter will hold at full scale in fields as high as 100 times the maximum reading Operating Voltage 7 11 Volts DC High and low voltage is fully regulated Power Requirements One 9 Volt alkaline battery Battery life is up to 2 000 hours at normal background radiation levels Temperature Range 20 C to 55 C 4 F to 131 F Weight M4 223 9 grams 7 9 oz without battery M4EC 245
8. TY ELEMENTS OF WARRANTY This warranty covers all materials and craftsmanship in this product to be free from defect for a period of one year with only the limitations or exclusion set out below WARRANTY DURATION This warranty shall terminate and be of no further effect one year after the original date of purchase of the product or at the time the product is a damaged or not maintained as is reasonable or necessary b modified c repaired by someone other than the warrantor for the defect or malfunction covered by this Warranty d used in a manner or purpose for which the instrument was not intended or contrary to the written instructions or e is contaminated with radioactive material This warranty does not apply to any product subject to corrosive elements misuse abuse or neglect STATEMENT OF REMEDY In the event the product does not conform to this warranty at any time while this warranty is effective the Warrantor will repair the defective unit and return instrument to you prepaid without charge for parts or labor NOTE While the product will be remedied under this warranty without charge this warranty does not cover or provide for reimbursement or payment of incidental or consequential damages arising from the use of the inability to use this product The liability of the company arising out of the supplying of this instrument or its use whether on warranties or otherwise shall not in any case exceed the cost of correcting defects i
9. dom intervals depending on your location and altitude can be expected every minute from naturally occurring background radiation illustration 1 BEEPER GM END WINDOW MC1K no window OFF ON AUDIO SWITCH RANGE SWITCH MC1K X1 X10 X100 X1000 HEADPHONE DETECTOR AND PULSE sidewall OUTPUT BATTERY DOOR Optional USB OPERATION 1 Before turning on your instrument install a 9 volt alkaline battery If a battery is already installed turn the instrument on and switch the range switch to the battery position indicated by the battery icon on the on off switch Battery condition will be indicated on the meter 2 Set the range switch in the X1 position If the meter goes off scale move the range switch to the next higher setting X10 X100 or X1000 MC1K only Note Refer to specifications for operating ranges 3 For an audible signal position the OFF ON AUDIO switch to the audio position indicated by the speaker icon Note The flashes from the count light and the audible beeps are progressively shorter in X10 X100 or X1000 MC1K only 4 To use with Observer Software plug in the serial cable to the 3 5MM mono jack located near the battery door or a mini USB cable to the USB port located on the side of the instrument to connect to a Windows based computer PRECAUTIONS e Handle your instrument carefully as you would a camera e Avoid exposing the instrument to liquids moisture and corrosive gases also avoid extreme t
10. emperatures or direct sunlight i e car dashboards for extended periods Remove battery to prevent leakage if you do not plan to use the instrument for an indefinite period e The mica window of the GM tube can be easily damaged if struck directly DO NOT INSERT ANYTHING THROUGH THE SCREEN e To avoid contamination do not touch the instrument to the surface being tested This instrument may be sensitive to and may not operate in radio frequency microwave electrostatic and magnetic fields e Since the instrument has semiconductors in its circuitry it is susceptible to EMP electromagnetic pulse and may be rendered inoperable by an atomic detonation It has not been determined what distance from an atomic blast would be considered safe for semiconductor circuitry MAKING MEASUREMENTS To determine whether the radiation detected is alpha beta or gamma hold the back of the instrument toward the source see illustration 2 for location of Geiger tube Gamma If there is an indication of radioactivity it is most likely gamma or high energy beta Low energy gamma and x rays 10 40 keV cannot penetrate the sidewall of the Geiger tube but may be detected through the window Beta Place a piece of aluminum about 1 8 3 mm thick between the instrument and the source If the indication stops decreases or changes it is most likely beta radiation Most common isotopes contain both beta and gamma Alpha If there is no indication thr
11. n of the GM tube detector is shown in illustrations 3 and 4 The window of the tube is very thin mica This mica window is protected by a screen the MC1K does not have a window Some levels of alpha low energy beta gamma and x rays that cannot penetrate the plastic case or the side of the tube can be sensed through the window See Specifications for the GM tube sensitivities Try not to touch the instrument to any suspected radioactive substance Although some beta and most gamma radiation can go through protective gear try to avoid skin contamination and ingestion When you leave a radioactive area remove any protective outerwear and dispose of properly If you think you have been contaminated as an additional precaution shower and consult a physician BRIEF OVERVIEW OF RADIATION DETECTION None of the instruments listed in this manual detect neutron microwave RF radio frequency laser infra red or ultra violet radiation All of the instruments are most accurate for Cesium 137 and isotopes of similar energies Some isotopes detected relatively well are Cobalt 60 Technicium 99M Phosphorous 32 Strontium 90 and many forms of Radium Plutonium Uranium and Thorium Some forms of radiation are very difficult or impossible for a Geiger tube to detect Tritium is a by product of a nuclear reactor and is used in research The beta emissions from Tritium are so weak that there is very little instrumentation that is capable of detecting it O
12. n the instrument and after the said one year period all such liability shall terminate Any implied warranty is limited to the duration of this written warranty PROCEDURE FOR OBTAINING PERFORMANCE OF WARRANTY In the event that the product does not conform to this warranty please contact your local distributor NOTE Before using this instrument the user must determine the suitability of the product for his or her intended use The user assumes all risk and liability connected with such use Calibration Database Application Please fill out this form and send it back to us if you would like to be notified of the NIST calibration renewal for your instrument to S E International Inc P O Box 39 436 Farm Rd Summertown TN 38483 1 800 293 5759 931 964 3561 Fax 1 931 964 3564 www seintl com radiationinfo seintl com NAME MODEL NAME COMPANY SERIALNUMBER ADDRESS gt DATE PLACED INSERVICE CITY i EMAL STATE ZIP amp COUNTRY PHONE NUMBER g Or fill out the form online at http seintl com calibrations 28
13. ough the back of the case position the window close to but not touching the source see illustration 2 If there is an indication it is alpha beta or low energy gamma If a sheet of paper placed between the window and the source stops the indication it is most likely alpha Do not hold the source above the window to avoid particles falling into the instrument CALIBRATION CALIBRATION Factory calibration is by pulse generator and is typically 15 of reading relative to Cesium 137 For calibration to NIST standards contact the manufacturer distributor or a certified lab Calibration Procedure for the Monitor 4 Monitor 4EC and MC1K We Remove the four screws on the rear of the case and the one screw inside the battery compartment 2 Ease off the front of the case 3 Position the instrument upright with the back of the instrument facing the source refer to Illustration 2 and 3 4 Adjust the height of the instrument so the radiation symbol on the rear label that marks the center of the tube is centered with the beam 5 Measure the appropriate distance from the source to the center of the tube 6 Expose the instrument to the known radiation field 7 Adjust the appropriate trimpot x1 VR1 x10 VR2 x100 VR3 x1000 MC1K only VR4 The trimpots are located below the switches and above the battery compartment aa A GM Tube BATTERY DOOR Illustration 2 Illustration 3 MONITOR 4 4EC MC1K CALIBRATION SERVICE
14. testesschehSdescosentesscebesdeeb sSdvsssscdhisSedieanetbssSsdbesssdisstsiies fue tusdnisitstt 5 POSSIBLE HOUSEHOLD SOURCES OF RADIATION Q csssssssssssssssssssssssssssssssesseseeceneecccceeccceccecenceccennecneneenene 5 LOS SPRAY rsa Sea E E E E RS 6 SPECIFICATIONS MONITOR 4 G4 EC inertiae ekaniea iita ieaiai 6 MGU rsisi aa EA NRE E E NEE RE 7 LIMI TED WAPIRANT Ysissssssc costsstsss ccs cocsesstesasdeessSbnscnrsccosssnconccocssoenvoveecusranetaeGeodesbueeePGscesbeeeeecesduotuavosGeaettsunenedacebteeenssGssdsteessedasotet 8 CALIBRATION DATABASE APPLICATION cccccsssssssssssssssssssssssssssssessssssssseessessesstsssttttstnsesstsntenstsnsnsnnsstnnsessensensensesee 9 LIST OF ILLUSTRATIONS IELUSTRA TION Sis costececccececcectcesceteccee cee cceconessescoeeecotectoennvereegueesbeceseesaiereeqcrtastiateescvtcvniseeqicdiassneesqieciaynaeevnciavieatyeeleipnacericlaiee 2 ILLUS TRATION 2 inl sccsssscc cscs tess eden atsececee cee ares ap ate cence a e e ste 3 AAPM Visas aac aes R ERE E O 6 DESCRIPTION The monitor senses ionizing radiation by means of a GM Geiger Mueller tube with a thin mica window Note There is no window on the MC1k The tube is enclosed inside the instrument When a ray or particle of ionizing radiation enters or passes through the tube it is sensed electronically and displayed by a red count light When the switch is in the AUDIO position the instrument will also beep with each radiation event About 5 to 25 counts at ran
15. ther examples of when more sophisticated equipment is needed are for the measurement of contamination in environmental samples such as radioactivity in milk produce soil etc The radiation from some isotopes can cause a Geiger tube to overexcite and cause an indication of a higher level of radiation than is actually there Americium 241 is an example of this phenomenon Americium 241 is used in some smoke detectors and many different types of industrial density and flow meters Unless you know exactly what you are measuring and understand the limitations of detection instruments it is possible to draw misleading conclusions from your readings We designed our instruments to be able to detect the broadest range of ionizing radiation possible and remain in the price range of the average person The full spectrum of ionizing radiation cannot be measured by one single instrument Everyone agrees that radioactive materials can be dangerous We encourage you to seek out other sources of information POSSIBLE HOUSEHOLD SOURCES OF RADIATION SMOKE DETECTORS Some smoke detectors contain a sealed radioactive isotope as part of the smoke sensing mechanism CAMPING LANTERN MANTLES In recent years this has changed but some lantern mantles are made with radioactive Thorium Be especially careful not to inhale or ingest the fine ash left when they are burned out CLOCKS WATCHES AND TIMERS Many old timepieces have dials painted with radium to make them glow
16. ty Detects alpha down to 2 5 MeV typical detection efficiency at 3 6 MeV is greater than 80 Detects beta at 50 keV with typical 35 detection efficiency Detects beta at 150 keV with typica 75 detection efficiency Detects gamma and x rays down to 10 keV typical Graph 1 through the window 40 keV minimum through the ENERGY RESPONSE case GRAPH 1 Normal background is 5 20 CPM Relative to Cs 137 MONITOR 4EC Energy Sensitivity Oo The energy response to gamma through the detector sidewall is flat to within 61 or 26 over the range of 40 keV to 100 keV and within 35 or 17 over the range of 100 keV to 1 3 MeV referenced to Cs 137 Detects alpha down to 2 5 MeV typical detection efficiency at 3 6 MeV is greater than 80 RELATIVE COUNTRATE o NOR TDN Ow O Detects beta at 50 keV with typical 35 detection efficiency 102 10 104 PHOTON ENERGY keV Detects beta at 150 keV with typical 75 detection efficiency Detects gamma and x rays down to 10 keV typical through the window non compensated 40 keV through the sidewall Normal background is approx 5 20 CPM Operating Range Monitor 4 and Monitor 4EC 0 50 mR hr and 0 50 000 CPM or 0 500 uSv hr and 0 50 mR hr Range Switch for the Monitor 4 Monitor 4EC X1 X10 X100 Refer to common specifications for more details MC1K MC1K ENERGY R
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