User Manual (UDKG-100)
Contents
1. Index Description R W R eee Dynamic parameters 0x71 Alarm threshold R W Single 25 0x73 Preliminary threshold R W Single 25 0x75 Bottom threshold R W Single 25 0x77 Algorithm 0 Following 1 Sliding R W Single 25 0x79 Number of intervals Sliding 1 60 R W Single 25 0x7b Length of the interval Sliding seconds 1 65535 R W Single 25 Ox7d Sensitivity coefficient R h cps R W Single 25 Ox7f Dead time us R W Single 25 0x81 Kl R W Single 25 0x83 K2 R W Single 25 0x85 K3 R W Single 25 0x87 Hours worked R W Single 25 0x89 Self background Sv h R W Single 25 D Allowable values of the register Selection of measured quantity for this detecting device are 1 and 2 Preset by the manufacturer Code of this device is 32 Dimension of threshold corresponds to the dimension of measured quantity selected as default The device itself updates this parameter during operation D 2 Selection of the measured quantity Register 0x15 allows selection of the default measured quantity The measured quantity set as default is used by registers Instant value 0x09 Combined package Measurement result of the selected measured quantity OxOf Measurement result of the selected measured quantity 0x10 Measurement interval of the selected measured quantity 0x13 Uncertainty of the measurement result 0x142. 40 to 2 10 photons s 1 2 3 Measurement and indication ranges of the EDR of gamma radiation MCICAOM trange seraa seh eera p AOp a Mucaappeb unl SEDERE VESSE 1 to 5 10 uR h Meas rement Tange moa teknon a inl a n ty eles E EE E ETEA 10 to 5 10 uR h 1 2 4 Limits of the permissible basic relative conversion error of EDR of gamma radiation and Paina photon UX narea E aA EE A A E E A E EEEN not more than 30 1 2 5 Sensitivity to gamma radiation of Cs 662 keV EDR ofgamma fadiations35 0 uien densa xi doscaaaun eet eaten eiausawes Oiacl anes 1 9 s per 1 uR h gamina PhOton fl R reeur ee are ea Ea kw ie nee eee TEARS 0 5 s per 1 photons 1 2 6 Warm up time strne onia i e T 2 E E E not more than 1 min 1 2 7 Continuous operation without limitation of number of turning on off not less than 24 h 1 2 8 Instability during 24 hours of continuous operation 0606 not more than 5 1 2 9 Detecting devices provide generation of self diagnostics codes and current measurement information for the external information channel and access to the processed information using DiBUS protocol via communication line based on the RS 485 or RS 422 interface 1 2 10 Power supply DC voltage chads ect 3 nocda nedeaacovignetuiden eens aueuciaaos aseots 24 V 1 2 11 Current consumption at voltage 24 V 0 2 cece cece cee eee ee eee not more than 20 mA AJAH 418268 029RE 3 1 2 12 Detecting device
3. Overall and fitting dimensions of elements are presented in the Appendix A 1 4 3 The detector module has a cylindrical casing made of stainless steel 12H18N9T supplied with load bearing ring on one side and detachable threaded joint on another AJAH 418268 029RE 5 1 4 4 The cable entry casing is connected to the threaded joint the casing is made of stainless steel in its termination point the coaxial load bearing cable is dressed The termination point is supplied with a ring for attachment of the load bearing rope The wiring diagram is presented in the Appendix B for the assignment of the connector contacts see Appendix C 1 4 5 Detecting device is comprised of single crystal scintillator Nal Tl with dimensions 01830 PMT photomultiplier tube FEU 67B high voltage converter for high voltage supply to the FEU 67B amplifier discriminator for amplifying and selection of pulses by amplitude pulse conditioner for transfer of electric pulses via a long line 1 4 6 Power supply of the detector module is provided through the coaxial cable in accordance with the wiring diagram of the Appendix B The coaxial cable can be as long as 1000 m 1 4 7 On the opposite side of the cable the cable socket is soldered type 2RMD24KPN10GS5V1 which is intended for the attachment of cable to the connector of the interface unit BS 16DD PD 1 4 8 Instead of cable entry the service cable AJAH 685621 032 is allowed for use when
4. sisacescceicesvestowanamarsersees ates pumabaenGenvenet 23 E 2 Description ofthe interface cccaacrcuinsneaacenttararnsdaneadeenieainpreeaens 23 E 2 1 Overview of the main window sssssssssssssssserrersssesss 23 E 2 1 1 Parameters DUttoits bs lor Acie civa acy eesonk ostecgease satan 24 BD 1 2 Information panel scswkicsieecursdinniiaaceceies eae tetas een 25 E 2 1 3 Measuring data panel ai aviicevssnhaieslign teria ths 25 E 2 1 4 Device Status Panel heeren eiar or nni 25 E 2 1 5 Device parameters panel wsswecseeiesccvsaivcattaiworaanedaawes 26 E 1 PURPOSE OF THE SOFTWARE The TETRA Checker software hereinafter program is intended for adjusting and calibration of devices and detectors hereinafter device The program allows doing the following read and indicate values of the device parameters write the net address into the device write values of the dynamic parameters into the device nomenclature of parameters is defined by the device itself select one of the measured quantities in the device as a quantity requested by default indicate information about the operation of the device and measurement results on the monitor of personal computer indicate the device status information on the monitor of personal computer ATTENTION BUGS ARE POSSIBLE WHEN USING THE PROGRAM SIMULTANEOUSLY WITH NET CLIENTS ICQ clients Skype GTalk Jabber etc IF THIS IS THE CASE
5. calibrating the detecting device 1 4 9 Scintillator converts gamma radiation energy into scintillations flashes of light and the PMT converts those scintillations into electric signals pulses which are statistically distributed in the course of time and have different amplitudes and durations The amplifier discriminator performs selection of pulses their amplification and conditioning for transfer via long line 1 4 10 The sequence of electric pulses from the detector module is transferred to the interface unit through the coaxial cable where it is transformed into data with content and formatting corresponding to the DiBUS protocol The signal parameters correspond to the RS 485 or RS 422 interface standard Assignment of the connector contacts and parameters of the output signals are presented in the Appendix C 1 4 11 The interface unit processes and converts measurement information received in a form of statistically distributed and conditioned pulses into information about the EDR of X ray and gamma radiation The format of information obtained as a result of such transformation is defined by the DiBUS data exchange protocol that provides possibility of data transfer to the external devices intended for visualization storage and alarm signalling Two connectors are located on the ends of the detecting device casing LINE the connector of ONC BS 1 10 14 type for connection via communication line to the data processing unit
6. D 3 Restart of measurement Register 0x19 is used for restarting of measurement of the N th measured quantity The list of values written to this register is presented in the Table D 2 Table D 2 Values written to the register 0x19 Written value Description 0x00 Restart of measurement of selected measured quantity Value 1 2 Restart of measurement of corresponding measured quantity Oxff Restart of all measurements D 4 Current register Status register index 0x18 is used for determination of the detecting device status in accordance with the Table D 3 The value 0x0000 corresponds to a normal detecting device status B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 BS B4 B3 B2 B1 BO AJAH 418268 029RE 21 Table D 3 Description of flags of the status register 0x18 Flag Purpose BO 1 short circuit Bl 1 detector assembly is out of order B2 Reserved B3 Reserved B4 1 malfunction of the nonvolatile memory BS 1 Alarm threshold exceeded B6 1 Preliminary threshold exceeded B7 1 signal is below the Bottom threshold B8 Reserved B9 1 detecting device is not ready B10 1 parameters were changed B11 B15 Reserved D 5 Register Instantaneous Value of the selected measured quantity Data block of the package consists of combination of bytes
7. ENTER button Write new parameters to the detecting device by pressing the F2 key or SET PARAMETERS button in the right part of the window Device parameters Names of the parameters with example of their values are presented in the Table 2 1 Table 2 1 Names of the parameters with example of their values Alarm threshold 0 Preliminary threshold 0 Bottom threshold 0 Algorithm 0 Following 1 Sliding l Interval quantity Sliding 1 60 10 Interval time Sliding 1 65535 10 Sensitivity coefficient EDR R h cps 5 2e 007 Dead time us 3 Sensitivity coefficient flux photon pulse 2 0 Dead time us 3 Hours worked 83 Self background cps 0 2 4 5 For selection of the quantity to be measured EDR R h click on the SET CURRENT ALGORITHM button in the upper right corner The window will appear in this window select row EDR and press OK In the window Measuring data check that the measured quantity EDR is highlighted by blue color 2 4 6 For selection of units for flux EDR photon s click on the SET CURRENT ALGORITHM button in the upper right corner The window will appear in this window select row Flow and press OR In the window Measuring data check that the measured quantity Flow is highlighted by blue color Check that the measurement result in the upper left corner of the TE
8. Structure of the register Instantaneous value Idx InsMV InsPSS UniqSec Where Idx index of register 0x09 1 byte data type BYTE 1 InsMV measurement result of selected measured quantity 4 bytes data type Single 25 see description of the register Selection of the measured quantity in the table A 1 calculated using data for the UniqSec th second InsPSS number of pulses acquired during UniqSec th second 4 bytes data type Single 25 UniqSec unique identifier changes every second 4 bytes data type DWORD 11 Examples of packages are presented in the Table D 4 Table D 4 Note Package Request for measurement result of the Header A 010101 06 19 0100 C selected measured quantity Data 10 C Inquiry answer Header 010101 A 07 19 0500 C Data 10 XXXX C Request for measurement interval of the Header A 010101 06 0B 0100 C selected measured quantity Data 13 C Inquiry answer Header 010101 A 07 0B 0500 C Data 13 XXXX C Request for measurement uncertainty of the Header A 010101 06 01 0100 C selected measured quantity Data 14 C Inquiry answer Header 010101 A 07 01 0200 C Data 14 X C Where A are three bytes of the block address X bytes of the transferred values C are four bytes of the check sum AJAH 418268 029RE 22 Appendix E Obligatory SOFTWARE TETRA Checker USER MANUAL Content E l Purpose ofthe SOMmWare
9. equal to 8 88 uR h P readings from K after subtraction of the background were equal to 0 467 uR h Ko 0 774 R snv h mCi Koo 3 24 R sm h mCi AJAH 418268 029RE 28 Thus K for K calculated by the formula F 2 is i Ay Kgi P _ 412 0 744 0 467 _ 682 8 _ 1 37 Ay Kgo Py 1366 3 24 8 88 498 4 F 3 Let us calculate the increment of readings of the device with increasing of the K volumetric activity per 1 000 000 Bq m 1 MBq m 27 027 10 mCi m 27 027 10 mCi sm Then P K 4nK A p 1 37 12 56 0 774 27 027 10 0 0584 6208 10 R h 6 208 uR h Hus the calculated sensitivity to volumetric activity of K W is 6 208 pR h per 1 MBq m calc F 4 Experimental validation Detector assembly was immersed into a 200 liter drum filled with water the center of the detecting device s sensitive volume was located in the center of the drum The measured background value was 4 34 uR h After that KCI 2 2 kg 96 1 was dissolved in the 200 liter drum specific activity 16000 Bq kg The volumetric activity obtained was A 2 2 0 961 16000 0 2 169136 Bq m 0 169 MBq m According to the Table 6 1 in 1 the correction factor was determined K that allows taking into account dimensions of the drum The drum is 0 84 m in height its radius is 0 28 m The correction factor is 0 707 Multiplying of this factor and the volumetric activity of dissolved KC
10. greater 1 4 12 2 Algorithm Following allows tracking smooth variations as well as record jumps of the measured quantity The Following algorithm is characterized by a fast response to the measured quantity jumps which exceed the mean value by more than 30 where o JN N frequency of pulses s corresponding to the numerical value of jump like change At the constant count rate the averaging time is 200 seconds 1 4 12 3 Parameters of data processing algorithms are presented in the description of data exchange registers of the DiBUS protocol in Appendix D The algorithm selection procedure is described in the User Manual that comes with the Tetra Checker software see Appendix E 1 5 Marking and sealing 1 5 1 Casings of the detecting device elements have nameplates with the following information 1 the detector assembly BDKG 100 07 trademark and name of the manufacturer supplier designation of a device of which the assembly constitutes a part reference designation of the assembly works number of the assembly according to the manufacturer s system of numeration ingress protection provided by casings 2 interface units BS 16DD PD trademark or name of the manufacturer designation of a device of which the unit constitutes a part reference designation of the detecting device works number of detecting device according to the manufacturer s system of numeration pattern approval mark of
11. of the monitored radiation with AEDR of gamma radiation 5 10 uR h After overload the detecting devices are operable basic relative error of measurement remains within limits 1 2 20 By its protection against electric shock detecting devices comply with the IEC 61010 1 2001 1 2 21 Detecting devices are fire safe products fire probability is less than 10 year AJAH 418268 029RE 4 1 2 22 Detecting devices withstand the exposure to decontaminating solutions 1 boric acid H3BO3 16 g sodium thiosulfate Na2S203 5H2O 10 g distilled water up to 1 liter 2 trisodium phosphate or sodium hexametaphosphate any detergent 10 20 g l water solution 3 5 citric acid solution in rectified alcohol for connectors and contacts 1 2 23 Overall dimensions and weights do not exceed values shown in the Table 1 3 Table 1 3 Overall dimensions and weight of the detecting devices elements Name of the element unit fee en Weight kg AJAH 418268 027 Detector assembly BDKG 100 07 fea tl arian Go cad aneciey 1 2 24 The length of the logging cable type KG2x50 KSh between the detector assembly BDKG 100 07 and the interface unit BS 16 0 0 0 0 ee eee eee eee nents not more than 1000 m Weight of 10 meters of type KG2x50 KSh cable 0 ec teeee eee not more than 2 5 kg 1 2 25 Mean time before Tanlures 25 Aner ssiiw snes aisexiaatan Atanas not less than 5000 hours 12 26 Mian Ite Ge a 0 s dca
12. placed in conditions as per section 4 4 1 and kept under these conditions for 4 hours 4 4 3 Instead of cable entry AJAH 687111 001 the service cable AJAH 685621 032 is allowed for use when calibrating the detecting device After the calibration is completed assemble the detector assembly while assembling install the sealing rings and tighten the screw joint using service wrenches AJAH 741371 002 4 5 Procedure 4 5 1 External examination The items to be checked during external examination proper completeness absence of defects which could affect the detecting devices operation availability of operational documentation 4 5 2 Testing Perform the following operations to test the detecting device turn on the device according to section 2 2 apply power supply voltage Start the TETRA Checker software on the PC and make sure that detecting device AJAH 418268 029RE 11 parameters have being correctly read 4 5 2 1 Set the device s parameters Algorithm 1 Interval quantity 10 Interval time 10 Press F4 for restart of devices The detecting device operability can be checked by presence of indication of a measurement result in the window Measuring data of the TETRA Checker software 4 5 3 Determination of basic relative measurement error of EDR of gamma radiation and gamma photon flux 4 5 3 1 Determination of basic relative measurement error of EDR of gamma ra
13. program window Pressing the button Parameters displays a window shown in figure D 2 2 Parameters Figure E 2 2 Overview of the window Parameters AJAH 418268 029RE 24 The following can be done using the window Parameters selection of the serial port to which the device is connected setting extra waiting time of device s reply which may be necessary when additional devices radio modems protocol convertors etc are present in the information channel between the device and personal computer selection of the program s mode of operation with the device operation with individual device is fulfilled in the mode of requests using the broadcast address i e without indicating the net address of the device interrogation of the specified address is necessary when selection of a single device is needed from the functioning system or installation E 2 1 2 Information panel Information panel is located in the upper part of the main window to the left from the PARAMETERS button The following is displayed on the information panel in the course of the device preparation for measurements message banners related to the device preparation for switching to operating mode inthe course of measurements measurement result of the default measured quantity incase of failures during data exchange with PC information on errors The following messages may be displayed on th
14. s ambient air operation conditions operating temperature range i cosa uiesss honey cages goevadawdveddeewuawedss s minus 40 to 50 C Telatiye humidity seein a aaar E EEE EEE EE EI ES up to 98 at 35 C atMOsSpheric pPrESS TE viiese T a EE EE E 66 0 to 106 7 kPa content of the corrosive agents in the ambient air corresponds to the values in Table 1 2 Table 1 2 Type of atmosphere f Content of the corrosive agents Designation Description Sulfur dioxide gas not more than 20 mg m day I Relatively clean not more than 0 025 mg m Chlorides not more than 0 3 mg m day Sulfur dioxide gas not more than 20 to 250 mg m day I Industrial not more than 0 025 to 0 31 mg m Chlorides not more than 0 3 mg m day Sulfur dioxide gas not more than 20 mg m day HI Maritime not more than 0 025 mg m Chlorides 30 to 300 mg m day 1 2 13 Limits of the complementary measurement error of EDR of gamma radiation under operation conditions with ambient air temperature deviation from normal conditions 10 C eee 10 under increased relative humidity up to 98 at 35 C oo cece ccc cece ceeeee eee eee 10 1 2 14 Detecting devices withstand submersion of the device assembly into water lt deste depths 24 moran opie cae eas casece A ake meine Came saa oc ease down to 100 m E gt forap riod Ok MMC 5 04 429 ona Gesicesa E na ten sy mews ease
15. the measurement instrument ingress protection provided by casings made in Russia 1 5 2 Place and method of marking of the detecting device elements comply with the design documentation 1 5 3 Marking of the detector assembly BDKG 100 07 is engraved marking of the interface units is located on nameplates which are affixed to the units 1 5 4 Detecting devices are sealed in accordance with the design documentation 1 6 Packing 1 6 1 The detecting device s package complies with the design documentation and provides protection against ingress of atmospheric precipitations and aerosols splashes of water dust sand solar ultra violet radiation and limits the ingress of water vapour and gases AJAH 418268 029RE 7 2 INTENDED USE 2 1 Operational limitations 2 1 1 Detecting devices can be used with installations equipped with corresponding data exchange interface and providing power supply with required voltage for detecting devices 2 1 2 The following is not allowed during operation use of detecting devices at medium 6 35 kV and high above 35 kV voltage electric substation use of detecting devices as parts of high power electric installations use of mobile phones within 10 meters of the detecting devices 2 2 Preparation of the product for use 2 2 1 Remove plugs from the connectors of the detector assembly BDKG 100 07 and the cable entry install sealing rings on the termination point of the detector mo
16. 268 029RE 8 rocks ores liquid media and pulp which contain radionuclides by means of model experimental methods for determination of parameters of volumetric activity of measured media based on the measurement results of the EDR of photon radiation in accordance with specifically developed and certified measurement procedure It is recommended to familiarize with the Appendix F Measurement of the specific activity of liquids by immersion of the detector assembly into the pool reservoir 2 4 Adjustment 2 4 1 Before performing adjustment prepare the detecting device according to 2 2 2 4 2 Change of sensitivity Kx is performed by correcting the Sensitivity index parameter using the TETRA Checker software according to the formula 4 1 Change of this parameter results in proportional change of the readings measurement results 2 4 3 Correction of indications in the end of the range more than 0 4 of the upper limit of measurement range is performed by adjusting the dead time M using the TETRA Checker software Increasing dead time results in increasing indications at high count rates only 2 4 4 For correction of the detecting device parameters in the Device parameters window of the TETRA Checker software subsection Dynamic parameters place the pointer in the row with the desired parameter and double click on it in the column New value input new parameter value and press the
17. 9 hereinafter detecting devices are intended for measurement of gamma quanta fluence or the exposure dose rate hereinafter EDR in the boreholes pulp and other liquid media including logging works Detecting devices are used at the industrial facilities enterprises for radioactive waste conditioning and management in the areas neighbouring to the nuclear and nuclear hazardous including nuclear reactors as a part of systems complexes and installations for radiation monitoring Detecting devices are able to convert measurement information into data with content and formatting complying with the DiBUS data exchange protocol and to transfer the data to external information channels via communication lines with RS 422 or RS 485 interface Table 1 1 describes modifications of detecting devices that differ by interface units and interface types Table 1 1 Modifications of detecting devices Designation Description Interface type AJAH 418268 029 01 Detecting device UDKG 100DD including RS 422 AJAH 418268 027 Detector assembly BDKG 100 07 AJAH 418292 008 Interface unit BS 16DD AJAH 418268 029 02 Detecting device UDKG 100PD including RS 485 AJAH 418268 027 Detector assembly BDKG 100 07 AJAH 418292 008 01 Interface unit BS 16PD 1 2 Technical characteristics We De Enero yrange ona ee E duvehara egies wash oonea ops R oven not less than 0 1 MeV 1 2 2 Measurement range of the gamma photon flux
18. I gives Ay com Ay K 0 169 0 707 0 119 Bq m V corr The value as measured by the detector assembly was 5 11 uR h Increment to the background readings AP 0 77 uR h Actual sensitivity Wy act AP A 0 77 0 119 6 47 uR h per 1 MBq m The calculated error of the procedure A is A Wy act Wy care Wy cate 6 47 6 21 6 21 0 042 This does not exceed 5 Additional KCI 1 9 kg 96 1 1 9 was dissolved in the 200 liter drum specific activity 16000 Bq kg The volumetric activity obtained increased as follows A 4 1 0 961 16000 0 2 315208 Bq m 0 315 MBq m A Voor Ay Ky 0 315 0 707 0 222 Bq m Veorr The value as measured by the detector assembly was 5 74 pR h Increment to the background readings AP 1 4 uR h AJAH 418268 029RE 29 Actual sensitivity Wy act AP Ay 1 4 0 222 6 31 uR h per 1 MBq m The calculated error of the procedure A is A Wy aa Wy cae Wy cae 6 31 6 21 6 21 0 016 ie less than 5 act F 5 Calculation of the detecting device s sensitivity Let us calculate the increment of readings of the device with increasing of the Cs volumetric activity per 1 000 000 Bq m taking into account that 1 MBq m 27 027 10 mCi m 27 027 10 mCi sm Then P K 4nK Ay u 1 00 12 56 3 24 27 027 10 0 0857 12834 10 R h 12 83 uR h Thus the calculated sensitivity to Cs volumetric activity Wy c
19. IT IS RECOMMENDED TO CLOSE ALL ABOVE MENTIONED CLIENTS SOFTWARE AND RESTART THE PROGRAM E 2 DESCRIPTION OF THE INTERFACE E 2 1 Overview of the main window The overview of the program s main window is shown on the figure D 2 1 In the main window the following interface elements are located Parameters button Information panel Measuring data panel Device status panel Device parameters panel AJAH 418268 029RE 23 1 TETRA_Checker Dose rate 9 97e 006 Average count rate 19 Flow quanta s 70 9 30 Count rate 19 2 Device parameters Dynamic parameters Static parameters Device address 4 6 254 Alarm threshold AT 0 Device UDKG 100 Preliminary threshold PT 0 Device code 32 Bottom threshold BT 0 Firmware version 2 0 2985 20100830 Algorithm 0 Following 1 Sliding T Configuration date 19 04 1995 Interval quantity Sliding 1 60 20 Production date 19 04 1995 Interval time Sliding 1 65535 2 Device date time No information Sensitivity index dose rate R h pps 5 2e 007 Volume level No information Dead time ps 0 Current device language No information Sensitivity index flow quanta pulse 37 Dead time flow ps 0 Running hours h 0 Self background pps 0 Figure E 2 1 Overview of the main window E 2 1 1 Parameters button The Parameters button is located in the upper right corner of the main
20. N Oo3a Scientific Production Company Doza DETECTING DEVICES UDKG 100 User Manual AJAH 418268 029RE Content 1 Description and operation of the product ccc ccc e cece ence eee een ens 1 1 Product functionality 2 2 0 30ce sven nuiewdass noaedante ban pend as evigteenmimeeses 1 2 Technical Characteristics ct sudnsaanenwwenkeheratipniueametumnenmedantictads T3 Confis rato issie aise cet ie ale irae tae pk asl aley Ute ene 1 4 Design and operation cca tities cso cae abe Vda sean wanes cen dtebicotaleataset 1 5 Marking and sealing cg sancti atcusenciiven yea eiaeasn ent Te 1 6 Packing marna Aa T E seater aee teed dale REE E ET 2 Intended USE yn coceraapnewtdhane shaeahiaGrewnoepaheameumerapaneihneansepeluntuntepesh 2 1 Operational limitations vacicciedsestacirsens cheese see desaceeanadeneayaees 2 2 Preparation of the product for use c sce e cece eee etee ence een eed X3 Useofa PLOOUel ate uin concn A aston enteuutt einen tint ns Wuhan geet cc 2A AOUSUIMENE say iaceeriadielshinesiaveiiiaauvsariol icine sac a iaaa De Maintenance terie eare E a A I R 3 General NOEs seseina ine e Eo E ET Ea TEE 3 2 Safety precautions serorari aa a E E E EER 3 3 Maintenance routine f victs 8h aueneaiena ey discon Vaan cena ieaiee evans 4 Calibration FOULING ssas e eaa r e NEE AEE TIENS 4 1 General requirements 3 c 00 nevconconscundorsacerahawscersane savaduensgseces 4 2 Preliminary arrangements 5x5 0 cius
21. TRA Checker window is shown in corresponding units R h or photon s AJAH 418268 029RE 9 3 MAINTENANCE 3 1 General notes 3 1 1 Maintenance is performed with the purpose of ensuring correct and long term operation of detecting devices 3 2 Safety precautions 3 2 1 Before beginning to work with devices familiarize yourself with this User Manual 3 2 2 During all operations with detecting devices it is necessary to follow occupational and radiation safety requirements of current safety instructions in the company enterprise 3 2 3 All cable connections and disconnections should be performed with the power supply cut off When using detecting devices as part of measurement information complexes systems and installations hot connection of cables is allowed without switching detecting devices off 3 3 Maintenance routine 3 3 1 Maintenance is divided into routine and periodic 3 3 2 Routine maintenance 3 3 2 1 Routine maintenance is carried out during regular operation 3 3 2 1 Routine maintenance includes inspections of detecting devices for timely detection and elimination of factors which can compromise their operability and safety 3 3 2 2 The following main types and periodicity of routine maintenance are recommended MISUAL INSPECTION 4y cusascaneencotreews seer atuearcensune TOE R EN E N E EE A SEEE every month cleaning of external surfaces decontamination 0c ccc e cee ceceeesne eens ever
22. adaiaesanuiedeledepiinandeadadesanenwerares Ad Safety precautions cimere nie enia REEE EEA E A A TOOT IA OI EEEN EE EST E E AS Proceduren ninen ie oh racine oO te sla E E a e EEAO E EEES IRGUPING repai Seed erena a Eaa E e AOE AA ORARAA E NEERA TE ote ae Storap E o apeere npa a a a a a e a aia Transportation osie erene eni aE T E EEE lan aed NEE EE Disposal a oane a are a E arate Eaa eaa ONDA Appendix A Outline drawing 65scidscacssasicnios cokasieess tae ieciaedanihes coesobant Appendix B Wiring diagram 255 405 desasnach evae tncuegs ee neeacnesastaeasanacdoass vip ees Appendix C Assignment of the connector contacts ece eee sesers seere ees Appendix D Description of data exchange registers Using the DIBUS protocol esiri tcct desea rode En T EATE T ene a Appendix E Software TETRA_ Checker User Manual 0 seeeeeee Appendix F Measurement of the specific activity of liquids by immersion of the detector assembly into the pool reservoir 0c cece cece eee ee eee eee AJAH 418268 029RE 2 This User Manual contains information on design principle of operation characteristics of the product and instructions essential for correct and safe use of this product intended use maintenance servicing storage and transportation as well as information regarding the utilization of the product 1 DESCRIPTION AND OPERATION OF THE PRODUCT 1 1 Product functionality Detecting devices UDKG 100 AJAH 418268 02
23. allation UPG P with Cs sources range relative measurement error of reproduced EDR from 1 10 to 4 10 pR h with error of EDR of gamma radiation not more than 7 and gamma photon flux PC with technical means for use of corresponding port with installed TETRA Checker software Power supply with voltage 12 0 5 V and current not less than 100 mA Barometer with measurement range 60 to 120 kPa and scale interval 1 kPa Thermometer with measurement range 0 to 30 C and scale interval 0 1 C Stopwatch with measurement range 1 to 3600 seconds Note It is allowed to use newly designed or currently in use tools and equipment for verification provided that their characteristics are equal or better than indicated in this verification procedure 4 3 Safety precautions It is necessary to follow safety requirements described in section 3 2 and in documentation accompanying calibration tools and equipment 4 4 Conditions 4 4 1 The following normal operating conditions shall be met during calibration a SAMheMPCraline a aa N r E NN A EES E E E webiste EES 20 5 C So Telatiye all h midity wing scol ae anvna tian tee a aa ari from 30 to 80 atmospheric pressure co ickuta Sven ta deein ga kanes ticohan cecnetneana daced einer 86 0 to 106 7 kPa external radiation background 0 0 0 ccc cece eee e cence ees not more than 0 20 uSv h 4 4 2 The detecting device before calibration should be
24. and BD of 2RMGD type for connection of the detecting device assembly Power supply line and signal line are galvanically isolated from the side of LINE connector 1 4 12 Processing of the measurement information in the interface unit is carried out by Sliding or Following algorithm selected by operator during preparation of the detecting device for operation 1 4 12 1 The Sliding algorithm moving average method provides continuous measurement of the count rate The measurement result is determined as an arithmetic mean of separate readings that corresponds to measurement intervals of user selected duration and with the number of readings to be averaged also determined by the user AJAH 418268 029RE 6 The algorithm includes two parameters the number of elementary measurements interval quantity which can be set to any value between and 60 duration of the measurement interval interval time which can be set to any value between 1 and 65535 seconds Measurement interval is a period between two subsequent readings refreshing a measurement result The default measurement interval set by the manufacturer is 20 seconds The product of measurement interval time and a number of such intervals represents the averaging time when measuring count rate The greater this product is the lesser is the statistical uncertainty of measurement however the response time to changes of the measured quantity is also
25. and if necessary to test it SET ADDRESS in the broadcast mode this button allows to set the net address for setting the address press the button Set address then in the window that will appear input the new address three dot separated groups of digits 3 digits in each group The range of values in each group from 002 to 254 After completion the input click Ok The new address will be written into the non volatile memory of the device At the same time parameter date of correction of parameters is automatically set to current date AJAH 418268 029RE 26 GET PARAMETERS F3 when the button F3 is pressed values of parameters on the Device parameters panel are refreshed SET PARAMETERS F2 when the button F2 is pressed new values of the dynamic parameters are written into device At the same time parameter date of correction of parameters is automatically set to current date AJAH 418268 029RE 27 Appendix F Reference MEASUREMENT OF THE SPECIFIC ACTIVITY OF LIQUIDS BY IMMERSION OF THE DETECTOR ASSEMBLY INTO THE POOL RESERVOIR F 1 EDR created in the location of the detector assembly immersed into infinite medium in accordance with the Table 6 1 in 1 is calculated by the following formula P K 4m K A u F 1 where P is the EDR created in the location of the detector assembly immersed into infinite medium R h K is the relative sensitivity to the ra
26. arried out in clean boxcars when transported by air the boxes with detecting devices shall be placed in air tight heated compartment when transported by water and sea transport the boxes with detecting devices shall be placed in the hold 7 2 Arrangement and fastening of the boxes on transport means shall provide their steady AJAH 418268 029RE 13 position en route absence of displacement and striking each other 7 3 The requirements of the inscriptions on the transport packing shall be observed during loading and unloading 7 4 Transportation conditions are as follows 2 SPEMPELALIES senese nona en ode OE Ena EE ERA EErEE Eia from minus 50 to 50 C a humidity rrenen aet narape A EEA E I T up to 95 at 35 C sinusoidal vibrations 0 cece eee eee within frequency range from 10 to 55 Hz with displacement amplitude 0 35 mm 8 DISPOSAL 8 1 On full expiry of the detecting device its component parts service life and also prior to its dispatching for repair or calibration it shall be inspected for possible radioactive contamination of its surfaces Criteria for decision making on decontamination and further use shall comply with obligatory requirements of national standards 8 2 Decontamination shall be attempted in cases when the detecting device surfaces contamination including surfaces accessible during repair can be reduced below allowable limits In case the radioactive contamination exceeds allowa
27. ate 18 12 83 uR h per 1 MBq m F 6 Based on the expected background readings from the detector assembly immersed in water equal to 4 uR h let us suppose the minimum detected increment of readings to be equal to 0 4 uR h Then the minimum detected Cs activity Av is min Av min AP nin Wy cate 0 4 12 83 0 031 MBq m 31000 Bq m REFERENCES 1 Radiation Protection Handbook author V F Kozlov AJAH 418268 029RE 30
28. ble limits requirements set forth for the radioactive wastes become applicable to the detecting devices 8 3 Detecting devices accepted for operation after decontamination are subjects for repair or replacement in case of failure Detecting devices not suitable for operation with radioactive contamination levels below permissible limits should be dismantled to prevent further use and transferred to a special site for disposal of industrial wastes 8 4 Detecting devices with expired lifetime accepted for use after decontamination shall undergo technical inspection If the technical condition of a detecting device is satisfactory an extended operation term of the product shall be determined AJAH 418268 029RE 14 Appendix A Obligatory OUTLINE DRAWING Socket 2RMD24KPN10G5V1 Where detector module AJAH 418285 041 2 cable entry with logging cable AJAH 687111 001 3 ring groove Figure A 1 Outline drawing of the detector assembly BDKG 100 07 AJAH 418268 029RE 15 Plug ONC BS 1 10 14 LINE i Usup Rx Rx Case 152 176 Common Plug 2RMGD24B10Sh5 BD Detector Circuit U Output Common F 4 5 2 holes Figure A 2 Outline drawing of the interface unit BS 16DD BS 16PD AJAH 418268 029RE 16 Appendix B Obli
29. diation Determine the basic relative measurement error by means of successive exposure of the detector assembly to radiation with EDR values within the following ranges 1 10 to 5 107 uR h and 3 10 to 4 10 uR h For performing calibration do the following 1 place the detector assembly on the calibration installation so that the axis of the collimated radiation beam be perpendicular to the longitudinal axis of the detector assembly passing through the ring groove on the front side the assembly casing center of the detector assembly 2 create in the detector center which is located at the intersection of the longitudinal axis of the detector assembly with the plane coming through the ring groove on the the detector assembly casing the following values of EDR of gamma radiation from the Cs source in the range from 1 107 to 510 pR h and from 3 10 to 4 10 uR h 3 determine EDR for each test point as the arithmetic average of five measurement results obtained with exposition 100 seconds 4 calculate the relative error Ox in the i th point in per cents by the following formula X Xoi XG be X 100 4 1 where X is the EDR value reproduced by the calibration installation uR h X measurement result of EDR in the i th point uR h The detecting device is considered valid if the maximum obtained during EDR measurement does not exceed the value stated in the 1 2 4 If the calculated 5 for the
30. diation emitted by specific nuclide Kg specific gamma ray constant R sm h mCi A volumetric activity of the medium mCi sm u linear absorption factor of the medium sm F 2 The relative sensitivity to the radiation emitted by specific nuclide K is determined in experiment or using the formula Ke or F 2 where A is the activity of source with nuclide under consideration Bq A is the activity of Cs source Bq K specific gamma ray constant of nuclide under consideration R sm h mCi Koo specific gamma ray constant of 1376s R sm h mCi P readings from the source with nuclide under consideration after subtraction of the background R h P readings from the 137Cs source after subtraction of the background R h Readings above background level shall be obtained from two sources with identical dimensions one source containing 137Cs which is used for adjustment of the device and source with nuclide under consideration Activity of both sources shall be known The OSGI sources reference sources for gamma spectrometry are thought the most convenient However the OSGI source with K is not available thus special powder sources were prepared in plastic bags 50x70x10 mm with the use of filler intended for preparation of sources for spectrometric applications A Cs 1366 Bq A K 412 Bq P readings from Cs after subtraction of the background were
31. dule attach the casing of the cable entry to the termination point and tighten the screw joint using wrench included in the installation kit 2 2 2 Connect the interface unit to the detector assembly BDKG 100 07 through connector BD according to the wiring diagram see Appendix B 2 2 3 Connect the detecting device to PC using communication cable via the LINE interface unit connector RS 485 or RS 422 as shown in the Appendix B When necessary use interface convertors RS 232 RS 485 RS 422 or USB RS 485 RS 422 in accordance with figures 2 1 or 2 2 UDKG 100 RS 422 RS 485 Interface convertor Rees RS 422 RS 4 Detector RS i PC 24 V E assembly 2 J1 Rs 232 _ USB UDKG 100 Interface convertor Data processing unit Detector RS 422 RS 485 receiving and assembly BS 16 RS 232 USB processing of information and power supply 2 2 4 Start the TETRA Checker on the PC as described in the Software User Manual Appendix E and make sure that detecting device parameters have being correctly read The devices operability can be checked by presence of indication of measurement result in the window Measurement information of the TETRA Checker software 2 3 Use of a product 2 3 1 Detecting devices and units do not require any actions of personnel during their operation 2 3 2 The output signal can be used for measurement of the specific or volumetric activity of AJAH 418
32. e information panel in different situations when failures occur during data exchange COM port error probably the non existent port was selected or port is busy by another program recommended actions select correct port or release port by shutting down the concurrent program No reply this message appears when the device is not connected or the conversion mode of the matching device RS 232 to RS 485 RS 4272 is incorrect Read error probably in the broadcast request mode several devices answer simultaneously it is recommended to switch to request mode with specific net address or working in the broadcast request mode disconnect from the data way all devices except the one you need E 2 1 3 Measuring data panel As a rule Measuring data panel contains several lines each of which contains name of measured quantity Measurand measurement unit of the measured quantity Unit current reading measurement result Result measurement interval Time s error of the measurement result Measurement uncertainty In the upper part of the panel the following buttons are located Set current algorithm for selection of the quantity to be measured by default by the device Measurement result for the measured quantity will be displayed on the information panel On the Measurement information panel corresponding line will be highlighted in color Re
33. first test point exceeds the allowable error limit perform correction of the nominal conversion function by means of fitting the sensitivity coefficient K for this point at that the dead time M shall be taken from data of previous calibration If the calculated 6 for the second test point exceeds the allowable error limit perform correction of the nominal conversion function by means of fitting the dead time M for this point at that the sensitivity factor K shall be taken from the previous calibration certificate if K was not changed or from data of the current calibration Write new values of K and M into the device s memory using the button SET PARAMETERS in the right part of the window Device parameters of the TETRA Checker software If more than 50 change of K or a tenfold change of dead time is necessary for bringing AJAH 418268 029RE 12 the relative error value into allowable range than the results of calibration are considered negative Note Typical value of sensitivity coefficient is K 5 2 10 s R h and that of dead time is M 3 0 us 4 5 3 2 Determination of the basic relative error of gamma photon flux measurement shall not be carried out because the conversion factor of the gamma photon flux into count rate of pulses is in linear dependence with K Compliance with requirements with regard to basic relative error of EDR of gamma radiation ensures compliance w
34. gatory WIRING DIAGRAM ONC BS 1 10 14 V1 1 V Circuit y Upower 1 XS1 XP2 Rx DTR 4 Rx DTR 5 Tx 6 Tx 8 Casing 9 Common 10 Cont Circuit No Circuit Center U Output 1 U Output Outer Common 10 Common Pos Description Q ty Note designation A1 Detector module AJAH 418285 041 1 A2 Cable entry AJAH 687111 001 1 A3 Interface unit BS 16 AJAH 418292 008 1 XS Socket SRG 50 11FV 1 XS Socket 2RMD24KPN10G5V1 1 XP1 Plug SR 50 58PV 1 XP2 Plug 2RMGD24B10Sh5E2B 1 XP3 Plug ONC BS 1 10 14 V1 1 V 1 Figure B 1 Wiring diagram detecting devices AJAH 418268 029RE 17 Rx OTR Pos designation 1 Supply f 7 GND RX DTR T x Tx Housing GND Line Designation Interface Close contacts A2 AJAH 4 18292 008 BS 71600 01 BS 16P0 Description Interfacing assembly AJAH 418283 036 Composite assembly UKB 17 AJAH 4 18285 013 Plug connector ONC BS 1 7 12 V1 1 V Plug connector ONC BS 1 10 14 V1 1 V Figure B 2 Wiring diagram of the interface unit AJAH 418268 029RE 18 Appendix C Obligatory ASSIGNMENT OF THE CONNECTOR CONTACTS C 1 Parameters of the output signals of devices comply with the requirements of the communication line interface RS 422 RS 485 Cable type twisted pair cable type STP 4 category 5 or higher with impedance 130 20 Ohm C 2 Assignment of contacts of the LINE co
35. ith regard to basic relative error of gamma photon flux Accordingly 1 calculate the value of gamma photon flux F photons s by the formula F X 4 18 10 4 2 where X is the EDR value reproduced by the calibration installation R h 2 calculate the value of sensitivity coefficient Kr s photon s by the formula Kp K 4 18 10 4 3 Record the obtained value Kr into the certificate of calibration 5 ROUTINE REPAIRS 5 1 Routine repairs include restoration of damaged cables and connectors 6 STORAGE 6 1 Prior to putting into operation detecting devices shall be stored in a heated warehouse with natural ventilation in manufacturer s package at ambient temperatures from 5 to 40 C and relative humidity up to 80 at 25 C unpacked at ambient temperatures from 10 to 35 C and relative humidity up to 80 at 25 C 6 2 The storage location should be free of dust chemical vapours aggressive gases and other substances that may cause corrosion The storage location shall exclude exposure of the detecting devices to the direct rays of sunlight 6 3 Unpacking of device that was kept at temperature below 0 C shall be performed in the heated room after keeping the device under normal conditions for at least 4 hours 7 TRANSPORTATION 7 1 Detecting devices in the original manufacturer s package can be transported by all means of transport at any distance transportation by railway shall be c
36. nanneaernemdennnnavadvaeanoeedtnensdaaes T EOE not less than 10 years 1 2 27 Detecting devices do not contain precious materials 1 3 Configuration 1 3 1 Detecting device consists of detector assembly BDKG 100 07 AJAH 418268 027 and interface unit BS 16DD AJAH 418292 008 or BS 16PD AJAH 418292 008 01 connected with each other by the logging coaxial cable The detector assembly BDKG 100 07 includes detector module AJAH 418285 041 and cable entry AJAH 687111 001 with logging cable 1 3 2 Detecting device comes with installation kit and spare parts and accessories kit Interface PI 02 and software TETRA Checker are included in the delivery kit by the customer s request 1 4 Design and operation 1 4 1 The detecting device s operating principle is based on conversion of the ionizing radiation energy into series of conditioned electric pulses with count rate frequency proportional to the gamma photon flux or exposure dose rate 1 4 2 The detector assembly BDKG 100 07 consists of two parts detector module with internal connector of SRG 50 11FV type which is closed by the plug AJAH 715131 001 during transportation the connector is intended for connection of the cable entry cable entry with connector of SRG 50 58PV type for connection to the detector module during transportation it is closed by the plug AJAH 713721 001 sealing ring providing air tightness of screw connection between the cable entry and the detector module
37. nnector modular plug ONC BS 1 10 14 V1 1 V of the interface unit is presented in the Table C 1 Table C 1 Assignment of contacts of the LINE connector Contact Signal Commentary 1 Upow 12 0 24 0 V 4 Reception D Interface RS 422 RS 485 5 Reception D Interface RS 422 RS 485 6 Transmission Interface RS 422 8 Transmission Interface RS 422 9 Casing 10 Common C 3 Assignment of the contacts of BD connectors plug 2RMGD24B10Sh5E2B of the interface unit is presented in the Table C 2 Table C 2 Assignment of contacts of the BD connector Contact Signal Commentary 1 A inawiout Output signal is combined with power supply 2 epewiout Output signal is combined with power supply 9 Common Cable screen 10 Common Cable screen AJAH 418268 029RE 19 Appendix D Reference DESCRIPTION OF DATA EXCHANGE REGISTERS IN THE DiBUS PROTOCOL D 1 Data for reading from and writing to the detecting devices Data for reading from and writing to the detecting devices are interrogated in accordance with indices indicated in the table D 1 1 Data for reading from and writing to the detecting devices Index Description R W PN ae General purpose registers 0x09 Combined package Instant value R BYTE 1 0x0c Date and time of correction of the detec
38. s sccatphanee cos not less than 24 h 1 2 15 Detecting devices withstand sinusoidal vibrations in the frequency range from 10 to 55 Hz with displacement amplitude 0 35 mm Limits of the complementary measurement error of EDR of gamma radiation under sinusoidal VI EATIODS hieren e ro AE EOE E EE EATER AE sh ETA awe D OERE EE OE A eea t 10 1 2 16 Detecting devices are stable against seismic impacts with magnitude 7 according to the MSK 64 scale being installed on the building structures of the industrial site at 70 to 30 m relative to the grade level After the seismic impact with the above mentioned parameters detecting devices are operable within the limits stated in sections 1 2 4 1 2 9 during the whole life cycle under specified operation conditions 1 2 17 Degree of protection provided by casings of the detecting devices elements detecting device assembly BDKG 100 07 1 2 0 00 ccc cece cece cece cette ena e esse enneeaes IP68 interface units BS 16DD BS 16PD 2 0 0 ccc cece cece eee eeseeeesseesanes ees IP65 1 2 18 Detecting devices are stable against electromagnetic interference of 2 grade according to the IEC 1000 4 8 93 IEC 1000 4 9 93 IEC 61000 4 2 95 IEC 61000 4 3 2006 IEC 61000 4 4 2004 IEC 61000 4 5 95 IEC 61000 4 6 96 IEC 61000 4 12 95 and comply with the emission standards stated by the CISPR 22 2006 for equipment of class A 1 2 19 Detecting devices are stable against short duration 5 minutes overloads
39. ssess the value in the exponential form for example 2 3E 003 0 0023 Some parameters are read only for example Running hours Correction of the parameters is carried out as follows double click on the line of the parameter to be corrected inthe column New value input new parameter value press ENTER or click on any other line if necessary correct other parameters press the button Set parameters F2 check correctness of the writing new parameter values will be displayed in the column Parameter point after a while ATTENTION DECIMAL POINT SEPARATOR BETWEEN INTEGER PART OF THE NUMBER AND THE FRACTION IS USALLY A DOT HOWEVER YOUR OPERATION SYSTEM CAN BE SET TO USE COMMA INSTEAD BE CAREFUL WHEN YOU INPUT NUMBERS Sets of values or ranges of values of parameters are indicated in the operational documentation for each device E 2 1 5 4 Buttons on the Device parameters panel In the upper part of the Device parameters panel the following buttons are located DEVICE DATE TIME this button is activated for devices that has or emulates built in clocks SET DEVICE LANGUAGE OF THE INTERFACE this button is activated for devices with multilanguage interface it allows setting the active language of the device SET VOLUME LEVEL this button is activated for devices equipped with adjustable signaling features it allows to set the desired volume
40. start measurement F5 for initiating new measurement cycle for certain measured quantity Restart all F4 for initiating new measurement cycles for all measured quantity E 2 1 4 Device status panel On the Device status panel the information is displayed with regard to current state of the device and other device specific information readiness of the device for measurement different errors which occurred during the device operation results of comparison of the measured values with preset thresholds etc AJAH 418268 029RE 25 E 2 1 5 Device parameters panel E 2 1 5 1 The Device parameters panel contains information about static parameters which are not used in the measurements process and dynamic parameters which define measurement characteristics of the device and also general information about the device operation E 2 1 5 2 Static parameters Device address Device Device code Firmware version Configuration date Assembly date Device date time Volume level Current device language Factory number Parameter Configuration date is a variable it is automatically changed when the Set parameters button is pressed Parameter device address represents the net address of the device E 2 1 5 3 Dynamic parameters Each device has its own set of dynamic parameters Some parameters can possess the value of 0 or 1 some parameters can po
41. ting device R Long DateTime 31 parameters 0x0d Date and time of assembling of the device R Long DateTime 31 Ox0f Combined package value of selected measured R BYTE 1 quantity see description of the register Selection of measured quantity and status of the device 0x10 Measurement result of selected measured quantity R Single 25 see description of the register Selection of measured quantity 0x13 Measurement interval for selected measured quantity R DWORD 11 see description of the register Selection of measured quantity 0x14 Uncertainty of the measurement result for selected R BYTE 1 measured quantity see description of the register Selection of measured quantity 0x15 Selection of the measured quantity R W BYTE 1 0x18 Status of the device R WORD 5 0x19 Restart of measurement W BYTE 1 Oxlce Device code R BYTE 1 Oxld Setting the net address of the block 1 W DiBUS_address 33 Oxle Software version R UNICODE 29 Measured quantities 0x22 Measured quantity No 1 R Single 25 Exposure dose rate EDR R h 0x23 Interval for EDR measurement s R DWORD 11 0x24 Uncertainty of the EDR R BYTE 1 0x27 Measured quantity No 2 R Single 25 Average count rate counts per second cps 0x28 Interval for measurement of average count rate s R DWORD 11 0x29 Uncertainty of the average count rate R BYTE 1 AJAH 418268 029RE 20
42. y year 3 3 2 3 During visual inspection conditions of cables and connectors and reliability of securing are assessed 3 3 2 4 Decontamination of detecting devices is performed in accordance with work schedule at the company facility external surfaces of detecting devices are decontaminated using solutions 1 and 2 of the 1 2 22 after cleaning surfaces using cloth moisten with decontaminating solution it is necessary to wipe surfaces using cloth moisten with distilled water and then dry using filter paper cable connectors are decontaminated using solutions 3 of the 1 2 22 additional treatment with distilled water and drying with filter paper are not required Dry cleaning can be performed with any periodicity Detecting devices should be disconnected from the power supply before dry cleaning and or decontamination 3 3 3 Periodic maintenance Periodic maintenance consists of calibration of detecting devices 4 CALIBRATION ROUTINE 4 1 General requirements 4 1 1 Calibration of detecting devices are performed in accordance with the IEC 61453 2007 4 2 Preliminary arrangements Operations performed during calibration and necessary equipment are listed in the Table 4 1 Table 4 1 List of calibration operations AJAH 418268 029RE 10 Calibration tools and equipment and their technical Operation a characteristics 1 External examination 4 5 1 Visual 2 Testing 4 5 2 3 Determination of basic 4 5 3 Calibration inst
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