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Chapter 9 Maintenance

Mini-Switch LB 471

9.4.2

Checking the Crystal-Multiplier Combination

Often, faulty parts can easily be detected through visual inspection
of crystal and multiplier.



Crystal



Magnetic shielding

(Mu-metal)



Photomultiplier



Optical connection

Crystal is OK if

Crystal has to be replaced if

the crystal appears to be crys-
tal-clear inside, does not have
any cracks nor milky spots and
has a slightly greenish color-
ing.

the crystal shows a clear yel-
lowish to brownish coloring.

Multiplier is OK if

Multiplier has to be replaced if

the vapor deposited layer in
the multiplier window (photo
cathode) has a slight brownish
or tinted glass like coloring.

the vapor deposited layer is no
longer available or spotted
(cathode destroyed e.g. due to
overheating, breakage of glass
or incidence of light).

If no errors are visible, you can check the function of the crystal-
multiplier combination by performing a plateau measurement.

Figure 45:

Multiplier-crystal

combination









Содержание LB4710-050

Страница 1: ...Process Control Limit Switch Mini Switch LB 471 Hardware Manual ID No 39505 BA2 Rev No 03 17 Nov 2015 Soft Version 1 12 or higher detect and identify User s Guide...

Страница 2: ......

Страница 3: ...dware de scription and the software description The hardware manual comprises mechanical components assembly electrical installation radiation protection guidelines technical data electrical and mecha...

Страница 4: ......

Страница 5: ...eldings 17 2 7 General Safety Instructions 19 2 8 Emergency Instructions 19 2 8 1 Theft Protection 20 Chapter 3 Functional Safety 21 3 1 Use and Function 21 3 2 Safety Function 22 3 3 Safety Requireme...

Страница 6: ...Shielding Installation 67 7 1 General Installation Instructions 67 7 2 Installation Proposal for Shielding 68 7 3 Pneumatic Shielding Shutter Option 70 Chapter 8 Electrical Installation 71 8 1 Connect...

Страница 7: ...s 108 13 4 Pneumatic Locking Drive 108 Chapter 14 Certificates 109 14 1 ATEX Certificate for Evaluation Unit LB 4710 XXX 109 14 2 ATEX Certificate NaI Detector 113 14 3 ATEX Certificate GM Detector 11...

Страница 8: ......

Страница 9: ...r s guide has been written for operating assembly and service personnel The system may only be assembled serviced and maintained by authorized and trained persons Any modification of the settings may...

Страница 10: ...ic mode the value is calculated using a formula Enter 1 to enable the automatic mode The inverted C in the top row indicates whether a parameter has been set to automatic EVU Evaluation Unit Edit Chan...

Страница 11: ...der a certain code Timeout Time after which an automatic reset is performed Full Level below limit value Full count rate Count rate with full container Count rate Value of counts relative to one secon...

Страница 12: ...d for the activity of a source However this unit has been replaced by the unit MBq 1mCi 37 MBq 1 5 Safekeeping of the User s Guide Note This user s guide always has to be available at a fixed place Th...

Страница 13: ...nnel have been defined on an international lev el These limits have to be observed when designing shieldings and planning the configuration of the measuring system at the meas urement point 2 2 Symbol...

Страница 14: ...tor compliance with the regulations of the Radiation Pro tection Ordinance issue directives and carry out training and instruction of the employees get on site information on the situation and takes a...

Страница 15: ...ed Areas Controlled areas are areas in which persons in one calendar year may receive an effective dose of more than 6 mSv if they stay in this area 40 hours a week and 50 weeks per calendar year Base...

Страница 16: ...e of more than 1 mSv in one calendar year The monitoring area starts at the controlled area It is an area in which persons staying permanently in this area may be exposed to a radiation level of more...

Страница 17: ...tightly welded into a sturdy stainless steel capsule so that the radioactive substance cannot escape and contamination is pre vented The capsule with the source is fixed on a holder and installed into...

Страница 18: ...ing configuration such that the internationally permissible dose rate limits will not be exceeded The source and shielding version is documented in the supplied technical source documentation and on t...

Страница 19: ...ing provisions have to be taken Danger Hazard due to radiation damages Never touch the source with your hands Restrict access to this area identify radiation protection areas Check the function of th...

Страница 20: ...have to be secured such that they are protected against access by unauthorized persons If you discover that radioactive substances are missing you have to notify the radiological safety officer and th...

Страница 21: ...on device for containers storing liquids that are hazardous to waters Electromagnetic compatibility according to EN 61326 and Na mur NE 21 If the device is employed in safety relevant systems function...

Страница 22: ...uous demand rate SIL PFDavg PFH 4 10 5 to 10 4 10 9 to 10 8 3 10 4 to 10 3 10 8 to 10 7 2 10 3 to 10 2 10 7 to 10 6 1 10 2 to 10 1 10 6 to 10 5 Safe failure fraction Hardware fault tolerance SFF HFT 0...

Страница 23: ...ternal power supply failure rates multiple errors operating mode as minimum level switch The mean ambient temperature during the operating time is 40 C The environmental conditions correspond to those...

Страница 24: ...Keep Clear button pushed and turn the power supply on The device is reset to factory setting Basic parameter setting Set parameters according to the following parameter list The order in which the par...

Страница 25: ...stant s 0 1 999 9 1 13 Live count rate 0 999 9 Display 14 Maximum time constant s 0 999 999 8 15 Standard reading 10 11 10 16 Max or min limit value switch 0 Max 1 Min 0 1 0 17 Switching threshold 0 1...

Страница 26: ...e threshold EVU 0 99 85 50 20 50 Limit switch software 1 00 9 99 Version 51 Detector software only FSK 1 00 9 99 Display 52 Detector temperature C only FSK detector 40 80 Display 53 Detector high volt...

Страница 27: ...LOGIES or your local representative Typically you will lose some dynamics in the measure ment which results in a higher time constant Select code 31 Push the Enter button Push the Cal button The full...

Страница 28: ...to operation 3 6 Behavior during Operation and Malfunctions The following parameter are automatically adjusted in the course of operation relative to the decay compensation there fore their values may...

Страница 29: ...or of the physical measurement effect The methods and procedures used in the tests have to be named and their degree of suitability has to be specified The tests have to be documented If the function...

Страница 30: ...channel architecture HFT 1 Hardware Fault Tolerance 1 for Common cause 5 PFDavg TProof 1 year TProof 2 years TProof 5 years TProof 10 years 1 8 x 10 5 3 7 x 10 5 9 5 x 10 5 20 x 10 5 2 for Common cau...

Страница 31: ...y linear to the operating time in the period up to 10 years The above mentioned values apply only to the TProof interval according to which a recurrent performance check has to be carried out Time dep...

Страница 32: ......

Страница 33: ...Chapter 3 Functional Safety Mini Switch LB 471 33...

Страница 34: ...Chapter 3 Functional Safety Mini Switch LB 471 34...

Страница 35: ...Chapter 3 Functional Safety Mini Switch LB 471 35...

Страница 36: ...point and the source is designed on the basis of this calculation The system comprises three major components shielding with radiation source Detector evaluation unit The shielded radiation source is...

Страница 37: ...red in a 19 rack in a wall housing or in a cassette Caution Observe explosion protection Intrinsically safe and not intrinsically safe systems must not be mixed neither in a 19 rack nor in a wall hous...

Страница 38: ...On LED two fuses see Technical Data on page 105 additional filter section For 115 230V a 17W transformer module is installed In addition to the filter module the transformer module has a transformer w...

Страница 39: ...I M2 EEx ib I Cassette LB4710 080 not Ex 19 rack wall housing LB4710 090 not Ex Cassette LB4710 150 NaI detector or Super Sens II 2 G EEx ib IIC and I M2 EEx ib I 19 rack wall housing LB4710 160 II 2...

Страница 40: ...GM detector is equipped with one halogen counter tube for standard applications or with two halogen counter tubes for special applications for short switching times or to reduce a high source activity...

Страница 41: ...ed from normal environmental strain which may occur in industrial applications LB 4700 0 standard temperature range 1 enhanced temperature range 11 50 50 NaI point detector 12 50 50 NaI point detector...

Страница 42: ...ection Type G Gas Ex S Dust Ex M Mining Ex Irradiation x without collimator a axial r side irradiation 66 s side irradiation 90 Cable Entry 0 sidewise 1 axial Point Detector Rod Detector 1 25 25 1 500...

Страница 43: ...n 90 LB 4431 04 0r Gd E lateral irradiation 66 LB 4431 14 0s Gd E with WC lateral irradiation 90 LB 4431 14 0r Gd E with WC lateral irradiation 66 Intrinsically safe Gas Ex EEx ib LB 4430 04 0a Gi E a...

Страница 44: ......

Страница 45: ...ng transport Transport detector and evaluation unit in their original packing Protect parts against vibrations Use the eyebolts for transporting the Super Sens detectors 5 1 2 Transport Shielding with...

Страница 46: ...st be adequate to install the source with shielding and the detector Free space must be foreseen at the installation site for Freedom of motion for delivery of shielding detector and eval uation unit...

Страница 47: ...ain vibra tions and high temperatures The detector has to be mounted free from vibrations During in stallation and operation the detector must not be exposed to me chanical strain The ambient temperat...

Страница 48: ...31347 1 set 2 clamps 5 2 2 Stainless Steel Detector Holder Alternative A sturdy stainless steel holder may be used instead of clamps The holder comprises an angle on which two clamps have already bee...

Страница 49: ...tube in the detector The counter tube must not be covered by the holder or by clamps as this would adversely affect the sensi tivity of the measurement If the bracket cannot be installed on the contai...

Страница 50: ...l 4 holes d 11 mm into the bracket for the clamps 3 Install the bracket either directly on the container or on a sturdy girder 4 Install the detector on the bracket using clamps Figure 11 GM detector...

Страница 51: ...e sensitive area of the detector it has to face the source If the bracket cannot be installed on the container then it has to be mounted on the girder located in the vicinity Figure 15 shows three alt...

Страница 52: ...drill 4 holes d 11 mm into the bracket for the clamps 3 Install the bracket either directly on the container or on a stur dy girder 4 Install the detector on the bracket using clamps Figure 16 NaI de...

Страница 53: ...r is not welded onto the bracket drill 2 holes d 17 mm for the holder in the bracket using the drawing be low 3 Install the bracket either directly on the container or on a stur dy girder 4 Install th...

Страница 54: ...center of the flange covers the sensitive area of the detector The radiation window must face the source Figure 19 Installation with Super Sens detector Figure 20 Super Sens mounted on a container Squ...

Страница 55: ...the container or on a stur dy girder 4 Install the detector on the bracket using the flange Warning Risk of damage Heat conduction above the bracket or heat radiation from the con tainer may destroy t...

Страница 56: ...Sens with Radial Irradiation The radial radiation window located on the side covers the sensi tive area of the detector The radiation window must face the source Figure 22 Install Super Sens with late...

Страница 57: ...ake a suitable bracket for the container 2 Using the technical drawings on pages 127 to 130 drill 4 holes d 18 mm into the bracket for the flange 3 Install the bracket either directly on the container...

Страница 58: ......

Страница 59: ...can be connected easily Make sure that the water pipes do not lead past the radiation window Keep the following in mind to prevent that an air cushion builds up in the water cooling device Horizontal...

Страница 60: ...n between both cooling jackets Warning Risk of damage The cooling water flow must not be turned off if the maximum ambient temperature of the detector see technical data in chapter 13 2 will be exceed...

Страница 61: ...eter 90 mm in order to fix the detector later at its position again These clamps have to be or dered separately in addition to the water cooling If you are using a detector holder instead of the clamp...

Страница 62: ...ctor To do this open the four screws on the front side In order to install the collimator and the water cooling again to the detector you need four screws which are 5 mm longer than the original screw...

Страница 63: ...imator and water cooling towards the pitch circle of the detector Make sure that the position of the cooling nozzle is such that you later have unimpeded access to install the water feed pipes Detecto...

Страница 64: ...which are 5 mm longer than the original screws not included in delivery Screws Cover plate 2 Push the cooling jacket over the detector 3 Position the water cooling on the pitch circle of the detector...

Страница 65: ...Make sure that you position the cooling nozzle such that you later have unimpeded access to install the water feed pipes Water cooling GM detector 2 Tighten the locking ring for the water cooling Loc...

Страница 66: ...tor may get overheated and destroyed Make sure to use clean cooling water The amount of cooling water required may be taken from the graph below The X axis shows the max achievable ambient temperature...

Страница 67: ...sitioned as closely as possible to the container surface The radiation danger sign has to be installed very close by to the shielding The controlled area if there is one has to be identified and if ne...

Страница 68: ...lable Signals supplied by an optional limit switch have to be connected via an electrical line see Shielding LB 744X with Pneumatic on page 132 7 2 Installation Proposal for Shielding The shielding co...

Страница 69: ...Installation Mini Switch LB 471 69 Figure 34 Installation proposal for shielding Figure 35 Example of flange installation Flange installation Installation on pedestal LB 7440 LB 7445 LB 7442 LB 7445 L...

Страница 70: ...lable as a special version When turning on the compressed air the locking core moves to the OPEN position In case of failure of the compressed air the shutter is turned by to the CLOSED position by a...

Страница 71: ...be observed It is dependent on the capacity and inductivity of the cable used and is limited by the max permissible values stated on the ATEX certificate on page 109 If you are using the cable 32024...

Страница 72: ...ble will not be exceeded When installing the con nection cable make sure that no water can get inside the connec tion room via the cable After connection the connection room has to be locked again car...

Страница 73: ...14a 14c Relay 3 warning relay shutter open in case of alarm and in the idle state 16a 16c Relay 1 collective failure message shutter open in case of alarm and in the idle state 20a 20c Digital input...

Страница 74: ...ector cover Detector cover Cover screws 3 Take off cover 4 Insert line Cable bushing M 16 for cable 8 10 mm Cable bushing has to face down in order to prevent water from penetrating For detectors with...

Страница 75: ...evaluation unit See connection diagram on page 137 8 1 3 Installing the GM Detector 1 Install cable between evaluation unit and detector For maxi mum cable length see the technical data on page 105 2...

Страница 76: ...Install screwed cable gland on line Screen 6 Connect line to terminals 6 and 2 Terminal 2 Terminal 6 Cable bushing PG 16 7 Attach cover again and fix it 8 Connect grounding on the outside of the groun...

Страница 77: ...itching state of the relays is also signaled by LED s on the front panel 8 2 2 Digital Input The digital input is used to perform an empty calibration from the control station The following terminals...

Страница 78: ...e voltage for which the device has been designed The supply of the evaluation unit s has to be guided via a sepa rate fuse An easily accessible shut down has to be foreseen if the power supply unit su...

Страница 79: ...System does not work or no reading on display Power supply faulty Check power supply Fuse on power supply unit faulty Check fuse replace it if necessary Fuse on evaluation unit faulty Check fuse on e...

Страница 80: ...e Figure 39 All parameters and settings will be retained The EE Prom has to be protected against destruction by electro static charge 9 4 Repairing the Detector If you suspect any error in the detecto...

Страница 81: ...ed Crystal multiplier combination Crystal Multiplier Detector electronics complete with base Detector case Detector cover Screwed cable gland Caution Risk of poisoning If you touch the coupling ring s...

Страница 82: ...ultiplier combination out of the case Make sure that the rubber disc at the bottom of the case does not fall out but remains flat at the bottom of the case 6 Pull off crystal multiplier combination fr...

Страница 83: ...e exposed to bright light Mu metal shielding Coupling ring 8 Twist crystal sideways do not pull to detach it from the multiplier Crystal or multiplier can now be replaced separately Mu metal shielding...

Страница 84: ...ilky spots and has a slightly greenish color ing the crystal shows a clear yel lowish to brownish coloring Multiplier is OK if Multiplier has to be replaced if the vapor deposited layer in the multipl...

Страница 85: ...optical contact area with a soft cloth to remove remaining silicon oil residues The same is true for the crystal 2 Apply a drop of pure silicon oil onto the optical contact ar ea of the multiplier Mu...

Страница 86: ...e main below the limit level during measurement The radiation channel of the shielding must be open in order to utilize the max imum radiation field for the measurement A plateau is the flat section i...

Страница 87: ...screws size 4 3 Carefully pull electronic base with electronics and coun ter tube out of the detector case Electronics base Electronics Counter tube Detector case 4 Now you can do a visual inspection...

Страница 88: ...d on the seal cer tificate of the source Caution Radioactivity Only competent and licensed persons in compliance with the offi cial regulations may replace radioactive sources Coordination with the ra...

Страница 89: ...the following tools handy Allan keys in the required sizes 10 12 and 13 2 pairs of pliers to take grasp source and source holder If sufficient space is available the source can be replaced directly in...

Страница 90: ...r position between OPEN and CLOSED The Al len screw head of the source holder is now visible With some versions the shutter plate has to be removed to be able to un screw the source holder 4 Using a s...

Страница 91: ...place it immediately into the auxiliary shielding 8 If required clean and grease the thread on the source holder and on the shielding 9 Using the pair of pliers take the new source out of the transpor...

Страница 92: ...ptoms appearance operating state be fore after Information on application Product being measured Installation situation Measuring system e g level point sources with point detector Parameter listing S...

Страница 93: ...nclude the following information Device type or LB number e g LB 471 Information on error appearance Delivery address Billing address Your order number if required Preferred mode of shipment if necess...

Страница 94: ...icer Number of sources Source number s Isotope activity Date of last wipe test Condition of source s and shielding s Information on the type of shielding in which the source will be transported if ava...

Страница 95: ...alt hough the shutter is still open The radiation protection agency stipulates that this test be performed in intervals of no more than 6 months Maybe you will be called upon to present the corre spon...

Страница 96: ...e of sealing Resistance to mechanical and thermal effects or classification of the source construction type Information on location application purpose and the customary maximum mechanical and thermal...

Страница 97: ...on swabs The cotton swabs are then locked air tight into a repository plastic bag or plastic container and checked for contamination 1 Rotate lever to horizontal position Alternative test area Alterna...

Страница 98: ......

Страница 99: ...se may stipulate that access to the con tainer shall only be permitted after the active beam is shielded Radiation protection areas outside the shielding must be if they are accessible marked and guar...

Страница 100: ...umulative and increases therefore with the duration of the radia tion exposure Conclusion Any work in the vicinity of radiometric measuring systems has to be prepared carefully and organized such that...

Страница 101: ...gned such that the limit of the controlled area runs in a given distance in most case less than one meter around the shielding A simplified calculation of the radiation exposure during assembly of the...

Страница 102: ...on of stay s attenuation factor of shielding see technical data on page 108 When working with an unshielded source s is set equal to 1 for calculation of the dose rate Nuclide k Dimensions Co 60 0 35...

Страница 103: ...nce and servicing work have to be examined for hazardous waste and the respective parts have to be disposed off accordingly The operating company has to take provisions to avoid waste and to ensure it...

Страница 104: ......

Страница 105: ...T4 0A in 19 rack Transformer module for 19 rack 85W 12TE 115V 230V AC 10 15 47 66Hz can be switched over Fuses T1 0A at 230V T2 0A at 115V Transformer module for wall housing 18W 8TE 115V 230V AC 10 1...

Страница 106: ...s I Division 2 Group B C D Class II Division 2 Group E F G Case Stainless steel case 4 5 kg at GHS 3171 or 6 kg at SZ5 GHS 3171 Operating temperature 40 50 C Water cooling optionally available Storage...

Страница 107: ...x ib d IIC T6 II 2G EEx de IIC T6 Protection type IP 65 Dose rate for 1000 I s 1 Cs 137 Co 60 0 14 Sv 0 20 Sv FM protection type Option Class I Division 1 Group A B C D Class II Division 1 Group E F G...

Страница 108: ...4 10 4 A 1 1 10 2 A 5 4 10 6 A 1 7 10 3 A 1 1 10 7 A 1 5 10 4 A Radius of controlled area cm with Cs 137 A in MBq with Co 60 A in MBq 0 74 A1 2 6 5 A1 2 0 15 A1 2 2 6 A1 2 0 07 A1 2 0 82 A1 2 Dimensi...

Страница 109: ...Chapter 14 Certificates Mini Switch LB 471 109 Chapter 14 Certificates 14 1 ATEX Certificate for Evaluation Unit LB 4710 XXX...

Страница 110: ...Chapter 14 Certificates Mini Switch LB 471 110...

Страница 111: ...Chapter 14 Certificates Mini Switch LB 471 111...

Страница 112: ...Chapter 14 Certificates Mini Switch LB 471 112...

Страница 113: ...Chapter 14 Certificates Mini Switch LB 471 113 14 2 ATEX Certificate NaI Detector...

Страница 114: ...Chapter 14 Certificates Mini Switch LB 471 114...

Страница 115: ...Chapter 14 Certificates Mini Switch LB 471 115...

Страница 116: ...Chapter 14 Certificates Mini Switch LB 471 116...

Страница 117: ...Chapter 14 Certificates Mini Switch LB 471 117 14 3 ATEX Certificate GM Detector...

Страница 118: ...Chapter 14 Certificates Mini Switch LB 471 118...

Страница 119: ...Chapter 14 Certificates Mini Switch LB 471 119 14 4 EC Declaration of Conformity...

Страница 120: ......

Страница 121: ...h collimator without collimator Specifications in mm Water conduit connections for water cooling 10 mm R1 4 Maximum pressure 6 bar Type Crystal Ex Collimator Weight in kg approx LB 5401 01 25 25 5 LB...

Страница 122: ...ne diameter 7 5 mm Water cooling for installation with SZ5 GHS 3171 and GHS 3172 1 Water conduit connections 10mm R1 4 maximum pressure 6 bar Specifications in mm Type ID No Ex Number of counter tubes...

Страница 123: ...LB 471 123 15 2 1 Fastening Clamps Fastening clamps are used for the assembly of GM detectors and NaI detectors For detector without water cooling D 75 For detector with water cooling D 90 ID NO 31346...

Страница 124: ...optionally instead of the fastening clamps The advantage is that this angle can be welded or screwed directly onto the bracket Moreover the holder is very robust and can be used in if little space is...

Страница 125: ...l irradiation Type ATEX Weight in kg approx LB 4430 04 0a Gd E Gas Ex II 2 G EEx de IIC T6 54 LB 4430 04 0a Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 54 LB 4430 04 1a Md E Firedamp 54 LB 4...

Страница 126: ...ation and water cooling Type ATEX Weight in kg approx LB 4430 14 0a Gd E Gas Ex II 2 G EEx de IIC T6 68 LB 4430 14 0a Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 68 Connection seal for water...

Страница 127: ...diation Weight in kg approx LB 4431 04 0s Gd E Gas Ex II 2 G EEx de IIC T6 90 60 LB 4431 04 0s Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 90 60 LB 4431 04 1s Md E Firedamp 90 60 LB 4431 04...

Страница 128: ...cooling Type ATEX Irradiation Weight in kg approx LB 4431 14 0s Gd E Gas Ex II 2 G EEx de IIC T6 90 74 LB 4431 14 0s Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 90 74 Thermal shield Connect...

Страница 129: ...ateral irradiation 66 Type ATEX Irradiation Weight in kg approx LB 4431 04 0r Gd E Gas Ex II 2 G EEx de IIC T6 66 60 LB 4431 04 0r Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 66 60 LB 5431 6...

Страница 130: ...cooling Type ATEX Irradiation Weight in kg approx LB 4431 14 0r Gd E Gas Ex II 2 G EEx de IIC T6 66 74 LB 4431 14 0r Gi E Gas Ex intrinsically safe II 2 G EEx ib d IIC T6 66 74 Thermal shield Connect...

Страница 131: ...tion Closed Type label LB 7444 Type Stainless steel case A B C D E F G H J K L M flange kg LB 7440 F CR LB 7445 F CR 180 142 60 60 15 18 20 173 238 200 M 8 12 ND 125 PN 6 16 31 LB 7440 FE CR LB 7445 F...

Страница 132: ...DE CR 570 LB 7444 CR ID No No Description 36119 Pneumatic locking drive with limit switch IP 65 80919 Pneumatic locking drive with limit switch Ex de IIC T6 Data for pneumatic locking drive Compresse...

Страница 133: ...c drive Pneumatic drive Point source shielding LB 744X Cable diameter 6 12 mm Cable diameter 9 12 mm Contact rating Adjustable cam External square for position indication or manual operation Screwed c...

Страница 134: ...wings Mini Switch LB 471 134 15 5 Dimensions of the Evaluation Unit 15 5 1 19 Rack 19 rack with 230 110V AC transformer 19 rack for 24V AC DC supply max 18 modules max 19 modules 8TE Filter module 12T...

Страница 135: ...Chapter 15 Technical Drawings Mini Switch LB 471 135 15 5 2 Wall Housing Six screwed cable glands 3 x M12 for cable 4 8 mm for detector cable 3 x M16 for cable 6 12 mm for out and inputs...

Страница 136: ...Chapter 15 Technical Drawings Mini Switch LB 471 136 15 5 3 Cassette Connector strip Option ID No 42571 For installation in any 19 rack with plastic divider for Ex i 7TE...

Страница 137: ...Chapter 15 Technical Drawings Mini Switch LB 471 137 15 6 Connection Diagrams 15 6 1 19 Rack Figure 53 Pin assignment 19 rack Figure 54 Connection diagram 19 rack...

Страница 138: ...le screw driver into the square hole next to the terminal This will open the terminal and you can in sert the wires 2 Pull the screw driver out again The wire is now jammed in the spring finger connec...

Страница 139: ...y safe installation use connector sleeves Connect wires 1 Insert suitable screw driver into the square hole next to the terminal This will open the terminal and you can in sert the wires 2 Pull the sc...

Страница 140: ...al Drawings Mini Switch LB 471 140 15 6 4 Connection Diagram for Power Supply Unit in 19 Rack Power Supply Netzteil Level Switch LB 4710 Grenzschalter LB 4710 Terminal Block for Power Supply Steckerle...

Страница 141: ...Mini Switch LB 471 141 Notes...

Страница 142: ...Mini Switch LB 471 142 Notes...

Страница 143: ...al in outputs 77 Digital input 73 77 Dismantling the GM detector 87 Dismantling the NaI detector 81 Disposal 103 Dose rate 101 Duty of notification 14 E Edit mode 10 Electrical installation 71 Electro...

Страница 144: ...luation unit 80 Replacing the source 88 S Sending in source and shielding 94 Sending in the electronics 93 Servicing the shielding 95 Shielded cable 71 Shielding installation 67 Shielding repair 94 Sh...

Страница 145: ......

Страница 146: ...Limit Switch Mini Switch LB 471 Software Manual User s Guide detect and identify Process Control...

Страница 147: ......

Страница 148: ...dware description and the software description The hardware manual comprises mechanical components assembly electrical installation radiation protection guidelines technical data electrical and mechan...

Страница 149: ......

Страница 150: ...Table 19 3 4 Parameter Description 21 Chapter 4 Getting Started 51 4 1 Turning On the Supply Voltage 51 4 2 Resetting to Standard Values 52 4 3 Basic Setting for Standard Mode 53 4 4 Calibration in St...

Страница 151: ......

Страница 152: ...w monitoring height Empty count rate Count rate with empty container EVU Evaluation Unit Operating unit with electronics Parameters are set and the meas urement is calibrated on the EVU Typically the...

Страница 153: ...e rate unit NaI detector Detector with sodium iodine crystal and FSK communication See also hardware manual Nuclide Isotope Type of radiation source Cobalt 60 Co 60 or Cesium 137 Cs 137 for level meas...

Страница 154: ...ments or decrements the value of the flashing digit Keep this button pushed down 2s to accelerate this process Clear Set values to 0 only in edit mode Exit edit mode without saving the value To save t...

Страница 155: ...r LED lights up the error relay indicates an alarm See error list on page 66 Alarm LED yellow Lights up when the monitoring level is exceeded Whenever the alarm LED lights up the alarm relay indicates...

Страница 156: ...g result display in code 10 2 1 6 Edit Mode To edit the value of a parameter you have to go to the edit mode The edit mode is enabled if you push the Enter button provided you have selected a paramet...

Страница 157: ...t you want to edit with 4 Edit the respective digit with 5 As soon as all digits match the current date push to con firm your entry The value is saved and the edit mode terminated 2 2 Reading in the C...

Страница 158: ...rcent in code 10 or the count rate in cps in code 11 If code 10 11 is not displayed push the Clear button for 2 sec onds to jump to the result display The reading in may fluctuate significantly around...

Страница 159: ...ic mode Example with code 17 switching threshold in Enter 1 After you have pushed the Enter button an automatically calculated value ap pears in the second row The inverted C shows that this parameter...

Страница 160: ...top row is displayed inverted Turn off automatic mode The automatic mode of a parameter can be overwritten any time by entering a fixed value 0 to set the instrument to the manual mode 1 Select the re...

Страница 161: ......

Страница 162: ...ount rate First all parameters have to be set You can start a calibration only in code 36 Behavior of auto manual parameters during calibra tion These parameters are set to automatic to speed up the g...

Страница 163: ...0 27 20 Empty count rate no input 0 999 9 Reading 19 21 Full count rate no input 0 999 9 Reading 29 22 Zero count rate no input 0 9 999 Reading 30 32 Zero count rate 0 9 999 Depending on detector code...

Страница 164: ...1 25 13 Live count rate 0 999 9 Reading 26 14 Maximum time constant s 0 999 999 26 15 Standard reading 10 11 10 26 16 Max or min limit value switch 0 Max 1 Min 0 1 0 27 17 Switching threshold 0 100 1...

Страница 165: ...ding 41 53 Detector high voltage only FSK 500 1300 1 42 54 detector HV start value only FSK 500 1300 HV default 42 55 Source replacement 00 00 99 12 1 42 56 Evaluation unit electronics temperature 100...

Страница 166: ...ing illustration explains the display when code 00 is se lected No password known Password known Device not locked Password known Device locked Year Display or enter current year The year is needed to...

Страница 167: ...ration mode Input Operation mode 0 Standard mode 1 Professional mode See operation modes on page 17 Detector code Enter detector code for the detector used Input for detector code Designation Detector...

Страница 168: ...er one digit in code 7 if a password is known in code 0 For this purpose the device must have been locked at least once using a password Warning relay as second alarm relay Enable warning relay as sec...

Страница 169: ...aking is actually building up When setting the time constant to manual the source decay has to be taken into account as well Because the source decay requires a larger time constant to ensure that the...

Страница 170: ...for 2 seconds Prerequisite is that you are not in the edit mode and that code 10 is the standard result display The standard result display is set in code 15 Reading cps Live reading in counts per se...

Страница 171: ...in the professional mode The displayed count rate comes directly from the detector and is not averaged by the time constant Maximum time constant s Upper limit of time constant in code 12 Only in the...

Страница 172: ...larm is to be triggered in case of overfilling Min alarm switch If an alarm is to be triggered in case of underfilling Switching threshold Switching threshold in percent Only in the professional mode...

Страница 173: ...g it is already set up optimally If you wish to set another switching threshold you can enter a fixed value in cps You can enter the switching threshold either as a percentage value in this code or in...

Страница 174: ...et up optimally and is constantly updated Note Perform a calibration in code 36 to check if your setting is correct Empty count rate cps Display of empty count rate used by the device for measurement...

Страница 175: ...display Depending on the operation mode this value is determined as follows Standard mode Professional mode based on code 32 as soon as empty calibration has been performed based on code 32 as soon a...

Страница 176: ...l then be transferred to code 20 See page 60 for further information on empty calibration Full count rate cps Read in enter or automatically calculate full count rate Only in the professional mode Inp...

Страница 177: ...n or enter zero count rate Input Function Cal button Read in count rate 0 Fixed value For more information on the zero count rate see page 58 The zero count rate is important because it ensures that t...

Страница 178: ...er here the distance covered by the radiation inside the container in mm Typically this is the inter nal diameter of the container If you enter 0 the function is disa bled Gas density in kg m Enter ga...

Страница 179: ...but in most cases it is sufficient for calibration of the limit value switch We recommend reading in the count rates new under operating conditions if this is possible at a later time Bulk density in...

Страница 180: ...s still sufficient for calibration of the limit value switch We recommend reading in the count rates new under operating conditions if this is possible at a later time Calibration Start calibration On...

Страница 181: ...e Determine full count rate or and zero count rate new 05 Distance switch point to FCR Distance switch point to full count rate is too small Danger of switching errors Adjust switch point or increase...

Страница 182: ...code 36 If the isotope is changed later the switch point will be adjusted automatically and you do not have to enable code 36 With 0 you can turn this function off Half value layers Enter product abso...

Страница 183: ...tive to code 39 you may also use in the profes sional mode the bulk density function in code 35 Interference radiation detection Enable Disable interference radiation detection Only in the professiona...

Страница 184: ...after this waiting time is over If interference radiation still exists after the waiting time is over the waiting time will always start once more For further information see page 64 Signaling interfe...

Страница 185: ...nly in the professional mode and only for FSK detectors Input Relay 0 No signaling via relay 1 Signaling via error relay 2 Signaling via warning relay The limit temperature is defined in code 46 The w...

Страница 186: ...measurement The signal is indicated on the display and if necessary also by a relay The relay for signaling is select ed in code 47 Limit switch software version Show software version of evaluation u...

Страница 187: ...y HV start value Set start value of high voltage control only FSK detector Input HV start value 0 Disabled 500 1300 Enabled A HV start value fulfills the following tasks Default value After turning on...

Страница 188: ...e before you enter a date Evaluation unit electronics temperature C Show current EVU temperature Only in the professional mode The board of the evaluation unit accommodates a temperature sensor An err...

Страница 189: ...he error relay Push Clear to exit the test Test alarm relay Test alarm relay Only in the professional mode Push the Enter button to enable and disable the alarm relay Push Clear to exit the test Test...

Страница 190: ...mal period stands for digital input no 3 Presentation of value on the display Digital input short circuited Input 2 Backup Input 3 Empty calibration 00 00 no no 00 01 no yes 01 00 yes no 01 01 yes yes...

Страница 191: ...may take several seconds The plateau measurement is carried out in 50V steps The count rate is averaged at each HV for 60 seconds each can be set in code 37 The HV starts at 500V and ends at the HV se...

Страница 192: ...number Push Clear to exit the error list Data position within an error 1 2 3 4 5 6 7 Error code Error sub code Minute Hour Day Month Year Error position 01 06 04 03 14 10 02 03 02 26 Example In the t...

Страница 193: ...hanged code Old value New value Minute Hour Day Month Year Position number 01 12 02 10 50 15 04 10 03 02 26 Example In the table above a parameter modification has been entered under error position nu...

Страница 194: ...meter set if you want to save the settings you have defined in order to access them later The saved setting can be invoked again after a reset Load parameter set A parameter set previously saved on th...

Страница 195: ......

Страница 196: ...uring range If a test run is not possible then you should at least check the reaction of the measurement with empty container and full con tainer should be simulated by closing the source shielding Ba...

Страница 197: ...if the current settings are correct The device can also be re set if a password is enabled 1 Turn supply voltage of EVU off or pull EVU out of slot 2 Keep Clear button pushed down and turn supply vol...

Страница 198: ...Reading 32 32 Zero count rate 0 9 999 Depending on detector code 32 39 Half value layers 1 9 2 37 50 Limit switch software 1 00 9 99 Version 41 51 Detector software only FSK detector 1 00 9 99 Readin...

Страница 199: ...5 3 Code 05 Enter detector code Enter detector code Example detector code 0 for LB 440X Detector type Designation Detector code FSK detector LB 440X 0 LB 540X 0 Super Sens LB 443X 23 LB 543X 23 GM de...

Страница 200: ...imum value switch 6 Code 32 Read in zero count rate Example 50 cps as natural environmental radiation Input Function Cal but ton Read in count rate 7 Code 39 Enter half value layers Example 2 half val...

Страница 201: ...cooling jacket is filled with the medium to be used later In agitator containers the agitator must in operation if it may have any influence on the limit value The shielding with the source has been...

Страница 202: ...ng Basically it is advisable to have commissioning carried out by the BERTHOLD TECHNOLOGIES service In the professional mode code 04 1 all parameters can be configured as needed and there is no restri...

Страница 203: ...ation this value should be read in as soon as possible The zero count rate is needed for the correct calculation of the decay compensation When reading in the zero count rate please keep in mind that...

Страница 204: ...nnel has to be closed If this method is used the detector often receives a minor amount of residual radiation from the radiation source which is negligible for Cs 137 sources For Co 60 sources this me...

Страница 205: ...ure containers has to be carried out under operating conditions pressure tempera ture The following influences have to be taken into account Wall deposits The container has to be emptied thor oughly t...

Страница 206: ...temperature as under operating conditions 5 2 1 External Empty Calibration Wall deposits and caking may trigger false alarms If these deposits build up slowly and their layer thickness changes only g...

Страница 207: ...OGIES this has already been taken into ac count The measurement configuration has to be installed at that point where the bulk cone diameter is to be monitored Calibration process 1 Determine empty co...

Страница 208: ...be below the monitoring level Now use the steel or lead plate and cover the sensitive part of the detector i e the scintillator Hold the plate between detector and container wall The plate must have...

Страница 209: ...rm is triggered by the following condition Is Io 1 5 Is live count rate code 13 Io empty count rate code 20 Note Function affected by interference radiation This type of interference radiation detecti...

Страница 210: ...put are held Error relay indicates alarm The measurement is stopped until the defined waiting time is over Once the waiting time in code 41 is over the program checks if the count rate is smaller than...

Страница 211: ...me constant A so called RC averaging is performed nM aM AZR aM 1 e t nM new average value aM old average value AZR current non averaged count rate t time distance of measurements in seconds time const...

Страница 212: ...for the type of error Error LED lights up Error relay signals alarm Measurement goes to halt Message is stored in error log Reaction in case of a minor error appears on display Measurement continues...

Страница 213: ...he HV start value of code 54 Check HV and standard HV If necessary update standard HV If necessary replace detector 03 HV 500V Err Halt Error relay HV is at lower limit at 500V Check HV If necessary r...

Страница 214: ...Adjust switch point or increase time constant 07 Hysteresis too large Hysteresis too large Increase time constant or reduce hysteresis 08 Time constant too small Time constant too small Increase time...

Страница 215: ......

Страница 216: ...lock it in position OPEN Incorrect alignment of useful radiation towards detector Correct and optimized alignment Container installa tions in radiation path Offset irradiation level Wall deposits in...

Страница 217: ...not help you have to perform a reset Please keep in mind that all parameters will be reset to factory setting Therefore write down all parameters and the setting values before you per form the reset...

Страница 218: ...detector will be ignored the error relay is enabled to indicate that the readings do no longer correspond to the level any more Note For the limit switch to continue working normally you have to turn...

Страница 219: ......

Страница 220: ...g 999 9999 Display 25 11 Reading averaged 0 999 9 Reading 25 16 Max or min limit value switch 0 Max 1 Min 0 1 0 27 20 Empty count rate no input 0 999 9 Reading 19 21 Full count rate no input 0 999 9 R...

Страница 221: ...Time constant s 0 1 999 9 1 25 13 Live count rate 0 999 9 Reading 26 14 Maximum time constant s 0 999 999 26 15 Standard reading 10 11 10 26 16 Max or min limit value switch 0 Max 1 Min 0 1 0 27 17 S...

Страница 222: ...software only FSK1 1 00 9 99 Reading 41 52 Detector temperature C only FSK1 40 80 Reading 41 53 Detector high voltage only FSK1 500 1300 1 42 54 detector HV start value only FSK1 500 1300 HV default...

Страница 223: ...Mini Switch LB 471 78 Notes...

Страница 224: ...Mini Switch LB 471 79 Notes...

Страница 225: ...temperature 40 Detector software 41 Detector temperature 41 Determining the zero count rate 58 Digital In 45 Digital input 61 Display 10 E Edit 7 Edit mode 7 9 11 Empty 7 Empty calibration 56 60 Empt...

Страница 226: ...9 Read in count rate 8 12 Read in full count rate 31 Real time clock 21 Reset 72 Run calibration in standard mode 56 S Save Load Reset 49 Select parameter 11 Signaling detector limit temperature 40 Si...

Страница 227: ...Mini Switch LB 471 82 Y Year 21 Z Zero count rate 8 30 32 58...

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