User Manual
Contents
1. 7 Vista The dosimeter has an intrinsic RS232C interface which is converted to USB using an RS232 USB bridge To establish a connection connect the dosimeter to PC using the USB cable provided and switched it on The instrument can be switched on even if the battery is run down as it will be powered by the USB Start the Intech DMS software Fig 1 The software automatically searches for the device and gets connected Refer to the screen shot of the software window below Click on the connect Read button for reading the dosimeter The current reading last reading before switch off will be displayed in the summary window on the top right corner along with date and ID number The dosimeter settings such as dose dose rate alarm level ID No Calibration factor are read and displayed in the Settings Window In the result pane the half hourly logged data are displayed and on the right side of the result pane the same data are plotted as a dose vs time graph The graph shows the difference between consecutive data as a bar at half hourly intervals and hence the bar represents the total dose accumulated in the respective interval This facility is very useful in investigating overexposure cases Suppose there is a significant dose during an interval which is the lunch time it can be safely interpreted that the dosimeter was left in a radiation area during that time inadvertently If the dose recorded in all the intervals are same withi2. 011 41013728 Email sale intechindia net Page 5 Intech Dosimeters Pvt Ltd the segments of the LCD and the buzzer for two secs If the buzzer does not sound or if any segment fails to turn on the dosimeter should not be used and returned to the manufacturer for service The display then resets to O000 in dose display mode To switch off the instrument press the switch and hold it for 5 Secs the unit will switch off To switch it on again wait for 5 secs and press the switch for one sec as above In a second version while the switching on will be as above by pressing the switch for a second the switching off cannot be done manually The unit can be switched off only by connecting the dosimeter to a PC and using the software supplied Dose amp dose rate display selection The display is normally in dose display mode uSv or mSv To go into the dose rate display the front panel button is briefly pressed amp released Within a few Secs the display will change to dose rate mSv h briefly and revert back to dose mode Alarm amp Mute The dose and dose rate alarms are sounded as long and short beeps respectively In the case of both dose and dose rate the beeps continue even if the alarm condition disappears The display indicates ALM The beeps can be muted by briefly pressing amp releasing the front panel button The ALM indication continues even after muting the buzzer till the instrumen
3. Intech Dosimeters Pvt Ltd I Dose Alarm IDA 110 User s Manual Intech Dosimeters Pvt Ltd F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 1 Intech Dosimeters Pvt Ltd Contents Description Page No 1 Introduction 3 2 Features 3 3 Specifications 4 4 Operation 5 5 USB Interface amp Software 6 6 Fig 1 DMS Software 9 7 Fig 2 Search Window 10 8 Fig 3 Genuine Exposure Pattern 10 9 Fig 4 Deliberate exposure Pattern 10 10 Fig 5 reset Pattern 11 F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 2 Intech Dosimeters Pvt Ltd I Dose Alarm IDA 110 Personal Dosimeter User s Manual 1 Introduction The I dose alarm is a compact pen type X amp y dosimeter with dose amp dose rate alarm built on 35 years of experience in radiation protection instrumentation It is ideal for use in Nuclear Power Stations University Laboratories Cancer Hospitals and other industries dealing with radiation It is suitable for use as a single stand alone dosimeter or as part of a comprehensive Dose Management System using Intech DMS software package Immunity to Electromagnetic Radiation from mobile phone in close proximity very low power consumption with battery lasting for over 1 year when used for 8 hours a day and simplicity of o
4. ly exposes the dosimeter to a oe radiation source As in this case the 250 dosimeter is stationary the dosimeter a registers equal doses within statistical i00 50 variations in the intervals This insight will be very useful while reconciling the digital dosimeter readings with TLD Interval 30 minutes doses F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 10 Intech Dosimeters Pvt Ltd Fig 5 Dosimeter Reset during interval 13 Time at RO is 10 55 00 6000 4000 2000 Bee EnEn ee gues 2000 4000 6000 lt ar Interval 30 minutes Fig 5 shows the pattern when a worker deliberately switches off the dosimeter to keep his radiation dose low The graph is plotted after obtaining consecutive differences in cumulative readings to indicate the exposure in a given interval As the dosimeter is integrating the dose the counts in any interval will always be higher than or equal to the counts in the previous interval except when the reading is reset to zero deliberately by switching the unit off and then on F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 11
5. mployee ID Calibration factor Dose rate alarm and dose alarm are read and displayed in the respective windows The data are modified and saved using the Save Settings button On pressing this button the user is prompted for password and only on entering the user name and password the values can be changed and saved This facility is useful to prevent unauthorized persons from altering the settings The user name and password can be changed by clicking on the Change Password button It is necessary to click on Disconnect button or wait for the status window to turn red before disconnecting the device Failure to do so will result in software hanging or data corruption or both Installation of Intech DMS software Please read the read me file in the installation CD before installing the Software It is necessary to install the driver for the RS232 USB bridge before installing the Intech DMS software The driver is included in the CD For any queries servicing requirement of spare batteries contact Intech Dosimeter Pvt Ltd F 49 Okhla Industrial Area Phase 1 New Delhi 110020 India Tel 011 26816487 26816489 Fax 011 41013728 F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 8 Intech Dosimeters Pvt Ltd Fig 1 DMS software Intech DMS Comm
6. n statistical variations it can be readily interpreted as a case of deliberate exposure If there is a negative bar then it is a case of the instrument switched off prior to that interval Figs 3 5 indicate the pattern for normal genuine exposure deliberate exposure and a reset condition occurring in any interval On clicking the save button the entire data including the half hourly data are saved in the database MS Access F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 7 Intech Dosimeters Pvt Ltd Reset button is used to reset half hourly data in the dosimeter delete button is for deleting selected data in the summary window before saving to the database The delete function is useful when the dosimeter is read twice or when some experimental data are present On clicking the Search button a search window opens Fig 2 Using the search window one can search for all the readings corresponding to an ID Number during a given interval by giving the starting date and ending date The data are displayed and the graph for any any selected data is displayed By clicking on export summary data or export detailed data the summary data or the detailed graph data are exported to MS Excel for print out dose report The Read Settings button on the bottom is used to read the data from the dosimeter The E
7. peration are the outstanding features of the dosimeter With I dose there is no need to juggle with scroll increment decrement buttons for setting alarm and other parameters The dosimeter has an USB interface to connect to a PC for setting various parameters like the dosimeter or user s ID Calibration Factor dose dose rate alarm settings and the time date of issue All these parameters are stored in a non volatile EEPROM and can be retrieved even if the battery runs out A free user friendly PC software is provided to facilitate entry of these parameters as well as transfer and storage of dose meter readings in a database 2 Features Semiconductor diode detector Convenient PEN type design Large easy to read LCD display Light weight 80 gms Simple 1 button operation USB interface for data setting transfer using free Intech DMS software Storing the time date of issue through PC F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 3 Intech Dosimeters Pvt Ltd Storage of Half hourly dose Storage of last value before switch off Very low power design over 5000 hrs of continuous operation with CR2477 coin cell Loud 80dB audible Dose dose rate alarms Excellent immunity to Cell phone EMI Switch off option Either through the button on the device or through PC One year re
8. placement warranty 3 SPECIFICATIONS Radiological Radiation detected X and y radiation Display Units Direct readout of dose equivalent in Sv Range Dose 1 uSv to 1 Sv auto ranging Dose rate 0 1 to 100mSv h auto ranging Alarms Dose and dose rate alarms continuously settable 80 dB 30 cm buzzer 9dB optional Dose long intermittent dose rate short intermittent Over range continuous Energy response 25 from 50keV to 1 25 MeV 137Cs BARC Tested Angular response 15 up to 60 for Cs BARC Tested Accuracy 137Cs 10 BARC Tested Dose rate linearity lt 20 upto 1 Sv h BARC Tested Overload 10 times the range on exceeding 15Sv BARC Tested display indicates ovr for over range Audible alarm becomes continuous Memory Memory Type EEPROM 10 years retention Dose profile history Fixed 30 mts intervals No of records 24 Electrical and Mechanical F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 4 Intech Dosimeters Pvt Ltd Power supply Battery Life Communications Display and function Size Weight Case material Single Li Coin CR2477 Over 5000 Hrs of continuous operation non alarming USB connector Control by a single button On Off dose rate select mute Pen type enclosure 26mm x 130mm x 15mm lt 100 g incl
9. t is switched off and then on Overload condition The dosimeter is 100 overload compatible i e the dosimeter will not show any under estimate when the dosimeter is exposed to an overload of up to 100 the maximum range 2 Sv As soon as the range of 15Sv is exceeded the display will indicate ovr over range with the audible alarm sounding continuously Storage of parameters The following parameters can be entered through a PC MS Windows using a free software provided with the instrument The dosimeter or user s ID Calibration Factor Dose dose rate alarm settings Time date of issue F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 6 Intech Dosimeters Pvt Ltd The dosimeter ID can be up to 8 characters alphabets or numbers The calibration factor setting is not available to the user it is for factory setting only The date amp time of issue setting is used to store the dose values every half an hour in the internal non volatile memory with time stamp Another exclusive feature of the dosimeter is the storage of the last accumulated value of dose just prior to switch off Thus the value is not lost if the unit is accidentally switched off 5 USB Interface amp Software A mini USB B connector is provided on the side near the battery compartment for connection to a PC Windows XP Windows
10. uding battery clip high impact ABS Environmental Operating temperature 0 C to 45 C Humidity 20 to 90 RH non condensing Vibration IEC 61526 2g 15min 10 33Hz Shock 1 5m drop on each surface on to concrete EMI EMC Exceeds IEC 61526 Less than 5 change in response due to EMI 100 V m cell phone in close proximity 4 OPERATION Principle of operation The dosimeter is basically an integrating device for indicating the cumulative dose The pulses from the detector are counted ina counter and the counter is read every 5 secs multiplied by the calibration factor and displayed as Dose in Sv or mSv The dose rate is calculated based on the counts accumulated every 5 secs and multiplying it by a suitable factor to obtain dose rate per hour Therefore the dose rate could have large spread due to poor statistics in low dose rates It is advisable to set the alarm level for dose rate above 0 5mSv h to avoid nuisance sounding of dose rate alarm As the dose rate is instantaneous just averaged over 5 secs dose rate display is for guidance only and the dose rate alarm is meant to fore warn momentary increases in dose rate above the expected dose rate Switching On and Off Press the button on the front panel for a sec and release The instrument will switch on into the buzzer display check mode by turning on all F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax
11. unication 10 08 2011 Status Port come Connect Read m Dosefusv Actions M Result Pane DateTime DoseValue a 11 31 00 11 31 00 366 6000 12 01 00 452 4000 12 31 00 449 2000 13 01 00 452 O eum neneee de o 13 31 00 459 2000 14 01 00 454 4000 14 31 00 462 6000 15 01 00 467 hd Settings Date Time 8 10 2011 1 33 30 PM Rate Alam 0999 99 mSv h Emp ld 00001125 Dose Alarm 099999 uSv Calb Fact 1200 Progress F 49 Okhla Industrial Area Phase I New Delhi 1100020 India Tel 2681 6487 2681 6489 Fax 011 41013728 Email sale intechindia net Page 9 Intech Dosimeters Pvt Ltd Fig 2 Search Window Search eee xi Emp ld From Date To Date fitte 02708 2011 x 10 08 2011 x Search Export Summary Export Detailed Data M Result Pane Empld DateTime DoseValue Time at RO is 10 53 00 AM cc 500 Te SRE ERE ED oe 500 H 1000 S 500 v 2000 2500 3000 i Log Data Interval 30 minutes Fig 3 Genuine Exposure RS Ree Fig 3 shows a typical pattern for a genuine exposure The exposures during all the intervals are different as will be the case in genuine personal exposure Also notice that the exposure is almost zero during interval 5 this could be a lunch interval when the worker remains in aradiation free area Interval 30 minutes Fig 4 Deliberate Exposure Time at RO is 10 52 00 Fig 4 shows the pattern when a worker deliberate
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