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BA082D66

Detector DG 27 - Co 60

4 HVL
max. attenuation

response time (s)

local

se rate at d

tector

[

Sv/h]

Fig. 5.12:

Relay response time as a

function of local dose rate for

detector DG 27 and source Co 60

Detector DG 27 - Cs 137

4 HVL
max. attenuation

local

dose rat

detect

response time (s)

BA082D67

[

Sv/h]

Fig. 5.13:

Relay response time as a

function of local dose rate for

detector DG 27 and source

Cs 137

sponse t

(s)

dose rate factor

BA082D67

0.5 HVL

0.7 HVL

1 HVL

2 HVL

4 HVL

Cs 137

Factor for DG 57/100: see graph
Factor for DG 57/400: graph x 0.5

Co 60

Factor for DG 57/100: graph x 1.8
Factor for DG 57/400: graph x 0.9

Fig. 5.14:

Local dose rate as a function of

relay response time for

DG 57/100 and DG 57/400

detectors

Gammapilot FTG 671

Chapter 5: Limit Switches - Relays

Содержание gammapilot FTG 671

Страница 1: ...gammapilot FTG 671 Level Limit Detection Operating Instructions BA 082F 00 en 12 03 016309 1000 Software 1 3 Hauser Endress The Power of Know How...

Страница 2: ...100s Press E to register entry With radiation off and vessel full wait 100s Press E to register entry Integration time V0H4 Enter max permissible integration relay switching time in s Press E to regis...

Страница 3: ...Z 29 4 Calibration and Operation 31 4 1 Commissioning 31 4 2 Standard calibration with background calibration for detector DG57 33 4 3 Standard calibration normal without background calibration for DG...

Страница 4: ...Gammapilot FTG 671 Table of Contents 2...

Страница 5: ...e highest safety classification for industrial source containments Certificates The Gammapilot FTG 671 is a transmitter for level limit detection which can be used with a variety of radioactive source...

Страница 6: ...rformed correctly may indirectly affect operation or may lead to an instrument response which is not planned Caution Caution indicates actions or procedures which if not performed correctly may lead t...

Страница 7: ...es describes in detail the setting of the relays for fail safe or acknowleged operation Chapter 6 Trouble Shooting contains a description of the self checking system with error messages the simulation...

Страница 8: ...conforming to EEx ib IIC A list of certificated combinations is to be found in Notes on Safety preceding this chapter Min max relays Gammapilot FTG 671 transmitter BA082E01 Source Detector Alarm rela...

Страница 9: ...dressed via the Rackbus In this case communication is controlled by a ZA 67 Gateway which converts Rackbus data into the appropriate network protocol The Gammapilot can be remotely configured its meas...

Страница 10: ...nd is dependent upon the orientation of the detector which however is usually mounted horizontally on the vessel Statistical assessment The precision of a gamma limit switch is dependent on the statis...

Страница 11: ...witch off point is exceeded an alarm is detected or the power supply fails A switching hysteresis is obtained by entering a second switch point Alternatively the relays can be operated in acknowledgem...

Страница 12: ...Gammapilot FTG 671 Chapter 1 Introduction 10...

Страница 13: ...o switch on the radiation How to switch off the radiation How to change the radiation source These must be read before the measuring system is commissioned Section 2 2 also includes a short descriptio...

Страница 14: ...ISO 2919 classification 66646 This is acknowledged to be the highest safety classification governing industrial source con tainments Source Container The gamma rays emitted by the radioactive source r...

Страница 15: ...source in the interior of the container The radius r of the control area At this radius the local dose rate is attenuated to a given value D The following table summarizes some typical examples For 13...

Страница 16: ...ctor In this case the dose rate usually lies below that defining a control area i e 7 5 Sv h 0 75 mR h or 2 5 Sv h 0 25 mR h which has to be sealed off Warning The actual extent of the control area de...

Страница 17: ...generated by a LED is sent through the scintillator to generate a reference value The reference value temperature and pulse rate are transmitted digitally via a two wire connection to the transmitter...

Страница 18: ...ed by gamma rays move to anode and cathode causing a current to flow Gas filled envelope with high voltage drop Anode Cathode Fig 2 6 Function of the DG 17 27 Geiger M ller counter Detector types DG 1...

Страница 19: ...rotective measures must be taken to prevent accidental exposure Using the clamps supplied the DG 57 detector must be clamped directly to the vessel or a steel frame DG 17 DG 27 Geiger M ller counters...

Страница 20: ...e transmitters to the left of the rack Install foreign cards first Install dummy panels between all foreign transmitters and between Racksyst cards and foreign transmitters in accordance with the inst...

Страница 21: ...the jumper switch see Fig 2 10 2 17 Monorack protective housing If the Gammapilot FTG 671 transmitter and Monorack II housing are to be mounted at an exposed site then it is recommended that they be i...

Страница 22: ...lated from all transmitter circuits and each other The circuit zero of the unit is connected to the negative terminal of the supply voltage Note Two indexing pins at positions 2 and 7 in the rack conn...

Страница 23: ...f standards in accordance with EN 50018 Section 12 1 and 12 2 Unused cable entries must be sealed to IP 65 in accordance with EN 50 018 Section 12 5 Type of protection IP65 must be obtained For connec...

Страница 24: ...own in Fig 2 16 Max current per contact 2 5A for switching capacity see Section 2 6 Alternative 2 RACKBUS d b z 2 4 6 10 8 12 14 16 32 L RACKBUS d b z 2 4 6 10 8 12 14 16 32 L RACKBUS d b z 10 18 r 20...

Страница 25: ...le connector at the base of the housing Note The Gammapilot FTG 671 is a Racksyst II card It cannot be installed in a Monorack I housing These are easily identified by the lack of the jumper switch in...

Страница 26: ...674 FIP gateway as follows Set a unique device address between 0 and 63 at the address switch When off each switch has the value 0 When on each switch is assigned the value shown in Fig 2 10 inset In...

Страница 27: ...eight approx 0 3 kg Multipoint plug conforming to DIN 41 612 Part 3 Type F 25 pole Coding pins in positions 2 and 7 Electrical connection Power supply 24 V DC 6V 4V residual ripple 2V within tolerance...

Страница 28: ...Gammapilot FTG 671 Chapter 2 Installation 26...

Страница 29: ...g Program TI 113 A matrix card reproduced at the back of this manual is delivered with the Gammapilot FTG 671 transmitter Current matrix position Gammapilot display Parameter at current matrix positio...

Страница 30: ...el of the Gammapilot FTG 671 Keys Function Matrix selection Press V to select the vertical position Press H to select the horizontal position Press simultaneously to select the measured value field V0...

Страница 31: ...ct matrix position Escape key selects the position V0H0 Displays error message if diagnostics icon flashes Press Escape to reset fault alarm and return to V0H0 Parameter entry Calls the parameter entr...

Страница 32: ...Gammapilot FTG 671 Chapter 3 Controls 30...

Страница 33: ...back cover Should the transmitter be exchanged at a later date simply re enter all the parameters and the system is ready to run see Chapter 6 p 42 4 1 Commissioning Note Make sure that the instrumen...

Страница 34: ...5 V3H2 0 DG 57 detector 6 E Registers entry 7 V3H3 0 Detector mounted horizontally 8 E Registers entry 9 V3H4 2425 1992 week 42 Friday 10 E Registers entry 11 Continue with calibration to Section 4 2...

Страница 35: ...e calibration parameters for the decay of the source The switching points are influenced by the compensation too The background calibration ensures that the minimum countrate will not drop below the b...

Страница 36: ...tion mode enables them again Note The alarm LED flashes Warning E 630 until all parameters have been entered The integration time is automatically set to 20 s during calibration 5x 100s even if the va...

Страница 37: ...r integration time see p 37 register entry with E The auxiliary calibration can be completed later by calling up the recalibration mode Recalibration Step Matrix Entry Significance 1 V3H0 4 Select rec...

Страница 38: ...urce It is run once every twenty four hours Minimum countrate check The measured countrate is checked continuously against the corrected mini mum countrate If it is smaller Alarm E 201 is set the alar...

Страница 39: ...countrate PCM or frequency PFM depending upon the detector mode used V0H8 Current measuring frequency or pulse rate Displays the frequency or pulse rate which is actually measured The value is dispaye...

Страница 40: ...umber Step Matrix Entry Significance 1 V8H9 e g 888 Enter any code from 100 669 or from 680 999 2 E Register entry In this mode all entries can be displayed but not changed The lock is released when a...

Страница 41: ...matrix fields V1H0 to V1H4 for relay 1 and V1H6 to V1H9 for relay 2 Table 5 1 lists the configuration parameters Table 4 2 in Section 4 5 summarizes the response of the relays in minimum and maximum...

Страница 42: ...entry 3 V1H1 20 Normalised countrate at which relay 1 de energises 4 E Registers entry Plausibility test DG 57 The limits entered are subject to a plausibility test Due to the statistical fluctuation...

Страница 43: ...relay response time 0 300s your process will tolerate Enter this plus 2 s as the integration time Figs 5 3 5 6 can be used to check at which local dose rate the warning E635 integration time too short...

Страница 44: ...x attenuation BA082D62 local dose rate at detector response time s Sv h Fig 5 7 Relay response time as a function of local dose rate for detector DG 57 400mm and source Cs 137 Detector DG 57 100 Co 60...

Страница 45: ...dose rate at detector Sv h Fig 5 10 Relay response time as a function of local dose rate for detector DG 17 and source Co 60 BA082D64 Detector DG 57 100 Cs 137 Detector DG 17 Cs 137 local dose rate at...

Страница 46: ...h Fig 5 13 Relay response time as a function of local dose rate for detector DG 27 and source Cs 137 0 5 10 15 20 25 10 20 response time s dose rate factor BA082D67 0 5 HVL 0 7 HVL 1 HVL 2 HVL 4 HVL...

Страница 47: ...rgises when the switching condition is fulfilled After switching the relays return to initial status only after the operator presses E when the confirmation field V1H4 relay 1 or V1H9 relay 2 is selec...

Страница 48: ...Gammapilot FTG 671 Chapter 5 Limit Switches Relays 46...

Страница 49: ...et thermal screening change of mounting position Current reference V7H4 This parameter is a measure for the relative sensitivity of the detector It is used internally by the software in order to compe...

Страница 50: ...Gammapilot FTG 671 Chapter 6 Maintenance 48...

Страница 51: ...1H3 and V1H8 see Chapter 5 p 35 the code for a diagnostic message is to be found in V9H0 If several faults occur together the code for the one with the highest priority is displayed The others can be...

Страница 52: ...hange detector If the voltage is not correct at the detector check for the same voltage at the output of the transmitter FMG 671 If the output voltage is not correct the transmitter is defective E404...

Страница 53: ...zontally Gamma beam not precisely aligned re align Fittings in vessel not considered in activity calculation recalculate activity and change source accordingly Build up in vessel Clean vessel Source t...

Страница 54: ...is entered at matrix position V9H6 or V9H7 the relay response can be tested accordingly Throughout the simulation the red alarm LED flashes to indicate that the instrument is no longer measuring the a...

Страница 55: ...on time and V1H0 V1H9 relay parameters For Co 60 source and DG 17 27 detector make additional entries at V3H1 1 V3H2 1 2 On completion of the above procedure the barrier now functions as before If you...

Страница 56: ...ice Centre with a note containing a short description of the fault Disposal of spent radioactive nuclides In all countries the disposal of radioactive material is strictly controlled by law If you are...

Страница 57: ...in the matrix below a full matrix is to be found overleaf The parameters in brackets are default parameters H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 V0 0 0 100 0 2 V1 72 38 0 0 38 72 0 0 V2 V3 0 0 Y WW D Y WW D...

Страница 58: ...ration Y WW D Today s date Y WW D Pulse rate frequency for empty calibration per 100ms 10 s Pulse rate frequency for full calibration per 100 ms 10 s Current mean local dose rate Sv h Dose rate in Sv...

Страница 59: ...Gammapilot FTG 671 Operating Matrix 57...

Страница 60: ...ion time 41 L Limit detection 36 Limit switches 39 45 M Measured value display 37 Measuring system 7 11 Monorack installation 19 Monorack protective housing 19 O Operating matrix 27 Operating paramete...

Страница 61: ...Index Gammapilot FTG 671 59...

Страница 62: ...Gammapilot FTG 671 Index 60...

Страница 63: ...Index Gammapilot FTG 671 61...

Страница 64: ...bamba Tel 042 56993 Fax 042 50981 Brazil Samson Endress Hauser Ltda Sao Paulo Tel 011 50313455 Fax 011 50313067 Canada Endress Hauser Ltd Burlington Ontario Tel 905 6819292 Fax 905 6819444 Chile Endre...

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