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RADIATION METER

TM-91N

HB2TM91N0001

TENMARS ELECTRONICS CO., LTD

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Summary of Contents for TM-91N

Page 1: ...RADIATION METER TM 91N HB2TM91N0001 TENMARS ELECTRONICS CO LTD ...

Page 2: ...CONTENTS 1 introduction 3 2 Safety Precaution 4 3 Specification 6 4 Identifying parts 7 5 Operation Procedure 7 6 Battery Replacement 11 7 NOTICE 12 8 Interaction of radiation with matter 13 9 End of life 15 ...

Page 3: ...the following instructions are followed your radiation monitor will give you many years of reliable service The radiation meters are very sensitive pieces of equipment Although housed in a high impact case the Geiger Mueller tube that senses radiation is fragile If the unit is dropped the G M tube may break Exposure of the unit above 40 100 may also cause the G M tube to stop functioning The elect...

Page 4: ...g CAUTION Please put the radiation monitor into a plastic zipper bag before operating it in a radiative contaminated area to avoid radiative dust falling on the monitor s surface Do not operate the meter under the environment with explosive gas material combustible gas material steam or filled with dust ...

Page 5: ...ternal operating voltage is over 400VDC In order to avoid reading incorrect data please replace the battery immediately when the symbol appears on the LCD In order to avoid the damage caused by contamination or static electricity do not touch the circuit board before you take any adequate action Operating Environment Indoors use This instrument has been designed for being used in an environment of...

Page 6: ...r 50µRem h 140 0mRem h Alarm function alarm set default 0 50µSv h can set 0 19 99µSv h Auto Power Off function set time default 30 min can set 0 60min 0 min disable auto power off Low battery indication Power 9V battery NEDA 1604 IEC 6F22 or JIS 006P Battery Life About 50 hours Alkaline battery Over load display OL Accuracy 20 Cesium 137 Energy dependency 30KeV to 1 3 Mev Weight 220g Size 143x74 x...

Page 7: ...ON OFF button 5 Unit and setup function up button 5 OPERATION PROCEDURE Press All segment of the LCD indicator is illuminated together with BEEP signal for about two second We are now ready for testing Intermittent BEEP signal follows during detection auxliary radiation strength sensing The higher the repetition rate ...

Page 8: ...etting auto power off APO the LCD display APO first the setting value press the or change the digit value Auto power off setting the initial value is 30 minutes Press more than 1 second to enter setting buzzer ON or OFF the setting default is always ON the LCD display ON or OFF press or change the ON or OFF Press more than 1 second to enter setting calibration facfor the LCD display CF first the s...

Page 9: ...in surface is fragile and poking sharp objects through the slots will damage the tube Your Geiger Counter is designed to be sensitive to 1 Gamma radiation which includes X rays 2 Beta radiation Gamma radiation and X rays can penetrate the plastic case with comparative ease Beta radiation can most efficently enter the case through the slots Although Beta radiation is easily detected It is difficult...

Page 10: ...beep sound volume in this position you can be certain that the object is emitting Beta radiation Now position the unit as shown in Figure 2 In this position where radiation cannot pass directly through the slots Beta radiation travels in straight lines for the most part only gamma and X ray radiation from the object wil be detected ...

Page 11: ...TTERY REPLACEMENT WARNING If the symbol appears on the LCD please replace the battery immediately Use form screwdriver to insert into battery cover hole OPEN Press completely screwdriver into battery cover hole and fix it on slide of hole Push screwdriver towards the back and remove battery cover out ...

Page 12: ...cturer assumes no liability for damages consequential or otherwise that may arise from the use of the Geiger counter by any person under any circumstances The Geiger counter is sensitive to gamma beta and X ray radiation but not necessarily to extremely low energy forms or alpha neutron or microwave radiation Do not open Geiger counter or otherwise tamper with or attempt to service it ...

Page 13: ...nown to emit betas at energies in excess of 10 million eV The penetration range of typical beta particles is only a few millimetres in human skin Alpha particles have even shorter penetration ranges than beta particles Typical alpha energies are on the order of 5 million eV with ranges so short that they are extremely difficult to measure Alphas are stopped by a nin sheet of paper and in air only ...

Page 14: ...ift through great thickness of material without incident A free neutron drifting through space will decay in an average of 11 7 minutes yielding a proton and an electron beta ray The neutron can also combine with the nucleus of an atom if its path carries it close enough When a neutron is absorbed into a nucleus it is saved from its ultimate fate decay but may render the nucleus unstable This abso...

Page 15: ...eral million eV One million e V gamma radiation can penetrate an inch of steel Gamma and X ray radiation are by far the most penetrating of all common types and are only effectively absorbed by large amounts of heavy dense material of high atomic number such as lead 9 END OF LIFE Caution this symbol indicates that equipment and its accessories shall be subject to a separate collection and correct ...

Page 16: ... Light meter RF meter Hot wire Anemometer Co meter Anemometer Lan cable tester Co2 meter Solar power meter Radiation meter Clamp meter Multimeter Phase Rotation test Digital Insulation tester Our products of high quality are selling well all over the world TENMARS ELECTRONICS CO LTD 6F 586 RUI GUANG ROAD NEIHU TAIPEI 114 TAIWAN E mail service tenmars com http www tenmars com ...

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