Fluke 943-227-15 User's Manual
Contents
1. A 2 SWITCH AND JUMPER POSITIONS 943 227 15 and 943 227 15VL Table A 2 Preamplifier Serial Interface Board 977 210 10M Switch Settings Normal Switch Function Op Microprocessor Reset switch momentary contact A A VA Not supplied AP SIS SW3 1 OFF Selects 300 baud 1 ON Selects 4800 baud normal setting SW3 2 OFF No function is implemented in the 977 210 10M SW3 3 OFF OFF Selects Rate Mode normal Selects Maintenance Mode for factory PGA and Auto Zero set up only SW3 4 OFF No function is implemented in the 977 210 10M NOTE SW3 is a 4 position DIP switch on the 977 210 10M serial interface board Table A 3 Jumper Positions for Preamplifier Serial Interface Board 977 210 10M Setting Setting normal JMP2 Deleted Not Used Deleted Not Used Table A 4 Jumper Positions for Preamplifier Electrometer Board 977 200 15M Jumper Normal Cal Function Setting Position JMP1 Normal Operation PGA Offset Adjust Programmable Gain Amplifier requires a special test PROM and is a factory adjustment Appendix B Applicable Drawings Appendix B Applicable Drawings B 1 Applicable Drawings 943 227 15 and 943 227 15VL Drawing No Description 943 227 15 Preamplifier Assembly RS232 943 227 15VL Preamplifier Assembly Victoreen Loop 943 227 15VL M1 Preamplifier Assembly Victoreen Loop w Conduit Hubs 977 210 10M Preamplifier HV Interface Printed Circuit Board Assembly 977 210 13M Preamplifi2. Biomedical Victoreen Digital Preamplifier Model 943 227 15 for use with Model 943 27 Current Mode Beta Detector Operator Manual February 2008 Manual No 943 227 15 1 Rev 3 2007 2008 Fluke Corporation All rights reserved Printed in U S A All product names are trademarks of their respective companies Fluke Biomedical 6045 Cochran Road Cleveland Ohio 44139 440 498 2564 www flukebiomedical com Section 1 1 1 A A dl dl ek ek Section 2 Section 4 4 1 4 2 4 3 Appendix A A 1 Appendix B B 1 Appendix C C 1 Appendix D D 1 Appendix E E 1 Table of Contents General Information EE 1 1 General Description 1 1 APPICCIU ke aa n ita 1 1 ee ee EE 1 2 Auxiliary Equipment EE 1 6 Recommend Spare Parts cocina oia 1 6 RECEIVING INSPEGtON musserende Edge EE 1 6 SAO adi a 1 7 Theory of Operation coccion e ef 2 1 Functional Description tati epi it elle being 2 1 Main Circuit Sare RAE 2 1 977 200 15M Electrometer BOO ra 2 1 977 210 10M Interface Board 2 4 Preamplifier Switch amp Jumper Gettings nn rana rancn rana 2 5 Operation ude e a da i da dida i o ba e 3 1 Installation a setae eet eek 3 1 SOU Pin rata a een o deere m a dE a arei 3 2 Operation astra Gna td denn ne ne helfen ri e aiden A ei aa eaves 3 3 Configuration FUNCHIONS EE 3 4 Set point Sula 3 5 Software ee IEN EE 3 5 Maintenance Calibration and Troubleshooting sr cane rn 4 1 EW Ile 4 1 E TE EE 4 1 TEOUD
3. LED2 Communications Receive ON bright both 15 and 15 volt loops present ON dim Only one loop supply present OFF no loop voltage from either supply Table 1 8 977 210 10M Test points Test Point RS232 Transmit 943 227 15 Digital Preamplifier Operator Manual 1 4 Auxiliary Equipment Model Description None 1 5 Recommended Spare Parts Table 1 9 Recommended Spare Parts List for the Model 943 227 15 Digital Preamplifier Part Number Description Used On 977 200 15M Electrometer Circuit Board 977 210 10M Serial Interface Circuit Board 92 7072 Fuse F1 F2 1Amp Communication Fuse 977 210 10M 450 1 0531 Dryer Air 5 Grams 977 200 15 1 6 Receiving Inspection Upon receipt of the unit 1 Inspect the carton s and contents for damage If damage is evident file a claim with the carrier and notify the Fluke Biomedical Radiation Management Services Customer Service Department Fluke Biomedical Radiation Management Service 6045 Cochran Road Cleveland Ohio 44139 Phone 440 248 9300 Fax 440 542 3682 2 Remove the contents from the packing material 3 Verify that all items listed on the packing list have been received and are in good condition NOTE If any of the listed items are missing or damaged notify the Fluke Biomedical Radiation Management Service Customer Service Department General Information 1 Spare Parts Receiving Inspection 1 7 Storage Stora
4. 943 227 15VL M1 Transmission 943 27 31 Beta 942A 200C Digital Ratemeter Digital Preamplifier Distances up to 1 Detector or Model 960 Digital Process mile 2 0 inch conduit Current Mode Control System field cable interface Operation 1 3 Specifications General specifications for the Model 943 227 15 Digital Preamplifier are series products are designed for nuclear applications and any repairs to ANSI 45 2 6 1978 Skill Level Il may void the nuclear rating listed below The 943 227 15 it by personnel not qualified to If a problem develops the preamplifier may either be returned to the factory for service or repaired by a qualified technician General Information 1 Application Table 1 2 General Specifications for the 943 227 15 Digital Preamplifier Feature Specification Preamplifier Power 15v 20 mA Preamplifier Input DC current 1E 12 to 1E 3 amperes from 943 27 Current Mode Beta Scintillation detector Preamplifier Output 943 227 15 RS232C 943 227 15VL Modified RS232C serial data for transmission distances up to 5 280 feet Electronic Accuracy 10 of the input current Response Time Decade Time 1 80 sec 2 32 sec 3 16 sec 4 4 sec 5 2 sec 6 0 9 sec 7 0 2 sec 8 0 2 sec 943 227 15 or 943 227 15VL 8 0 in x10 0 in x 4 0 in 20 3 cm x 25 4 cm x 10 2 cm Dimensions H x W x D 943 227 15 M1 or 943 227 15VL M1
5. Programmable Gain Amplifier requires a special test PROM and is a factory adjustment 2 6 Operation 3 Installation Section 3 Operation 3 1 Installation Installation consists of mounting the equipment making the required electrical connections and entering the desired set points CAUTION Remove all power prior to installing the Preamplifier Preamplifier Mounting The preamplifier is a self contained unit that is designed for mounting on a wall or structurally sound surface within 6 feet of the detector The preamplifier must be located in an area that is accessible for future maintenance CAUTION Remove all power prior to connecting field wiring Electrical Interface Electrical connections at the preamplifier include connecting the detector high voltage and signal coaxial cables and the field cable from the associated controller The detector high voltage and signal cables enter the preamplifier through Seal Grip type penetrations on the enclosure body The Seal Grips contain a rubber gland that is intended to grip the coaxial cables to prevent moisture entry into the enclosure The Seal Grips are an integral part of the detector cables The Seal Grip enclosure nut is removed from the fitting The insulating washer stay with the fitting The detector signal and high voltage cables with connectors and Seal Grip fitting nuts are then inserted into the holes preamplifier enclosure The
6. 8 0 in x10 0 in x 6 0 in 20 3 cm x 25 4 cm x 15 2 cm Weight Approximately 8 lbs 3 6 kg Housing Gasketed NEMA 4 Steel enclosure with hinged cover Operating Temperature 32 F to 122 F 0 C to 50 C Relative Humidity 0 to 99 non condensing Compatible Detectors Victoreen 943 27 Current Mode Beta scintillation detector only Detector Interface Detector cables enter thru Seal Grip fittings Mating SHV receptacle provided for HV Mating BNC receptacle provided for Signal Cable Requirements Victoreen Loop Communications 6 conductors 18 AWG 2 TwPr 2 Single conductor with overall shield For max transmission distance 16 AWG is recommended RS232C communications 8 Conductors 18 AWG 4 TwPr with overall shield Modification Information For the Model 943 227 15VL M1 refer to Modification description provided in Appendix E 1 3 943 227 15 Digital Preamplifier Operator Manual Table 1 3 Preamplifier Serial Interface Board 977 210 10M Switch Settings Normal Op aa O ESE SW2 N A Not supplied jer A ATA OFF No function is implemented in the 977 210 10M SW3 3 Be Selects Rate Mode normal Selects Maintenance Mode for factory PGA and Auto Zero set up only SW3 4 OFF No function is implemented in the 977 210 10M NOTE SW3 is a 4 position DIP switch on the 977 210 10M serial interface board Table 1 4 Jumper Positions for Preamplifier S
7. Seal Grip type penetrations on the enclosure body The Seal Grips contain a rubber gland that is intended to grip the coaxial cables to prevent moisture entry into the enclosure The Seal Grips are an integral part of the detector cables The Seal Grip enclosure nut is removed from the fitting The insulating washer stays with the fitting The detector signal and high voltage cables with connectors and Seal Grip fitting nuts are then inserted into the holes preamplifier enclosure The Seal Grip end fittings are then re installed securely against the wall of the enclosure Detector Field Cable Preparation MS Connector Prior to stripping the outer cable jacket a 4 inch length of 0 75 I D shrinkable tubing provided by the user should be slid over the 0 675 in cable jacket The shrink tubing will be used to seal and protect the end of the cable after the termination process is completed To prepare the cable for termination a minimum of 7 inches of the cable outer jacket must be stripped off the cable This will allow for the stripping of approximately one inch from the various conductors and provide 6 inches of actual service loop cable In addition for EMI RFI protection the drain wire must be terminated to an earth ground within the enclosure The length of the drain wire will be based on the distance between the cable entry and the ground location The length of cable jacket to be stripped will then be based
8. The detector electrometer converts the current from the detector to a voltage which is measured by the analog to digital converter of the preamplifier Under program control this measurement is made every 50 milliseconds on the first five decades and every 100 milliseconds on the upper three decades The electrometer is auto ranging and auto zeroing An internal coarse zero control factory adjusted is provided The microprocessor in the preamplifier performs data collection integration and multiplication by a stored calibration factor range changing and communication with the Model 942A 200C Digital Ratemeter or Model 960 Digital Process Radiation monitoring system 2 2 Main Circuit Boards The wide range ion chamber detector block diagram is shown in figure 2 1 Detector electronics are contained within two circuit board assemblies located in the preamplifier enclosure the 977 210 10 High Voltage Communications Interface circuit board assembly and the 977 200 15 Electrometer circuit board assembly Schematic diagrams are located in Appendix B The 977 200 15M Electrometer circuit board contains the microprocessor the EPROM the integrating electrometer the programmable gain amplifier the analog to digital A D converter and the auto zero DAC circuit The 977 210 10M Communications Interface circuit board contains the dc voltage regulator the BDC DC converter the asynchronous communication interface adapter ACIA the Victoreen communi
9. Seal Grip end fittings are then re installed securely against the wall of the enclosure The detector Signal BNC and High Voltage SHV cables are then terminated on the bulkhead connectors located on the enclosure inner panel On the 943 227 15 or 943 227 15VL the field cable is terminated on a MS type connector A mating MS style connector supplied with the detector It is not necessary to open the preamplifier enclosure to complete the interconnection to the associated controller On the 943 227 15VL M1 a 2 0 inch conduit hub is provided to interface with the field conduit system and cable The field conduit is connected to the preamplifier conduit hub and the field cable is routed through the conduit and into the preamplifier enclosure The field signal cable is then terminated on the terminal block in the enclosure Refer to the applicable wiring diagram or Table 3 1 The high voltage coax cable is then terminated on the mating SHV connector Refer to Appendix D for further information A desiccant bag is provided in the enclosure to absorb moisture The desiccant bags should be checked for moisture absorption prior to placing into service Each bag contains a color indicator stripe that turns red when it should be replaced 3 1 943 227 15 Digital Preamplifier Operator Manual NOTE The electrometer circuitry in the preamplifier is highly sensitive to moisture and physical damage Use extreme care when the preampl
10. and the baud rate must be set to 4800 baud If the wiring of the Communications option board to the P2 connector is suspected a loop test can be performed as described in Loop Test Mode The instruction manual for the Communications option board P N 942 200 80 1 contains information on how to set up the serial board in the UDR Firmware Version This system requires a PROM for operation For the part number and the latest revision of the PROM see the Factory Test Data Sheet This Manual has been prepared for use with the P N 227LNK Rev 2 PROM 3 4 Configuration Functions The preamplifier configuration jumpers and required settings for this application are listed below Table 3 2 Preamplifier Serial Interface Board 977 210 10M Switch Settings Normal Op SW1 Open Microprocessor Reset switch momentary contact FG ke ME EN Not supplied KE PETE SW3 1 ON OFF Selects 300 baud 1 ON Selects 4800 baud normal setting SW3 3 IRSE de Selects Rate Mode normal Selects Maintenance Mode for factory PGA and Auto Zero set up only SW3 4 OFF OFF No function is implemented in the 977 210 10M NOTE SW3 is a 4 position DIP switch on the 977 210 10M serial interface board Table 3 3 Jumper Positions for Preamplifier Serial Interface Board 977 210 10M Setting Setting normal JMP2 Deleted Not Used Deleted Not Used Table 3 4 Jumper Positions for Preamplifier Electrometer Board 977 200 15M Jumper Norma
11. as in dicated qr D dk ZA SEMI SOLID DIELECTRIC CP 1001 MASTER TT 4 Solder or crimp contact to center conductor For access type angle connectors omit this step and proceed to step 5 For captive contacts assemble contact capturing paris on cable before attaching contact as shown below BUSHING OR WASHER INSULATOR 5 Thread assembly into connector and lock se curely Vee gasket must ba split by braid clamp SEAL CONTACT 6 For access type angle connectors solder center conductor in contact groove Close access opening TRIM CODE CHART ee EC 5 1001 11 16 D 7 943 227 15 Digital Preamplifier Operator Manual CH eu 30 72 CP 1001 2KINGS MASTER TT CABLING PROCEDURE CP 1000 CLAMP NUT SLIP WASHER WHEN SUPPLIED 4 Solder or crimp contact to center conductor For access type angle connectors omit this step and Proceed to step 5 For captive contacts assemble contact capturing paris on cable before attaching contact as shown below 1 Cut cable end square place clamp nut slip washer when supplied and gaskat over jacket Remove jacket ta dimension A BUSHING OR WASHER INSULATOR GRAID CLAMP 2 Comb out braid and taper forward Piace braid clamp over braid against jacket cut 5 Thread assembly into connector and lock se curely Vee gasket must ba split by braid clamp SEAL CONTACT 3
12. conductor and is provided with 6 32 mounting screws Strip the conductor as required by the lug manufacturer install the lug and terminate the conductor to the appropriate terminal The screw terminals may now be torqued to 12 in lbs The mating HV connector P N 30 92 1 Kings 1705 14 may now be terminated per the applicable Kings data sheet attached The polyester filler cord may now be removed Cut the cord as close to the outer jacket as possible D 2 Appendix D Cable Termination Instructions HV CONNECTOR NOTES HV The mating HV connector P N 30 92 1 Kings 1705 14 may now be terminated per the applicable Kings data sheet attached LOCATION P N SHV 92 9105 A SHV 1705 1 SHV Alternate Connector 92 9105 A 51426 5 SHV 32 92 1 1705 14 DOCUMENT CP 400 Kings Cabling Procedure Trim Code 441 442 AMP Instruction Sheet 408 2187 CP 1001 Kings Cabling Procedure CP 1000 DESCRIPTION High Voltage Connector SHV male crimp contact pin Use Tool KTH 100 with KTH 2062 High Voltage Connector SHV male crimp contact pin Use Tool 69710 1 with 220028 2 Die or Integral Die Tool 220022 2 High Voltage Connector SHV Female solder contact pin D 3 943 227 15 Digital Preamplifier Operator Manual D 4 Instruction Sheet Standard High Voltage SHV 408 2187 COAXICON Plug Connectors 514264 ras 5 216 AMP Dua Crimp Type CG OCT ap Pr Forme Reasons lor reissue ara provided i
13. on the distance to the drain wire grounding point Once the cable outer jacket is stripped to the proper length the aluminum tape shield and Mylar binder may be removed taking care not to damage the No 20 AWG drain wire The drain wire may then be separated from the remaining conductors for routing and termination at the grounding point Next the HV coaxial cable may be separated from the bundle followed by the single conductors wires that are required for the specific application and the polyester filler cord Refer to the project specific detector loop drawing or the generic detector loop drawing provided in Appendix B for actual conductors to be used The polyester filler cord may now be removed Cut the cord as close to the outer jacket as possible The single conductors may now be stripped and soldered to the appropriate connector pin D 1 943 227 15 Digital Preamplifier Operator Manual Detector Field Cable Preparation 943 227 15VL M1 Conduit Hub Prior to terminating the cable the field conduit must be run to the junction box and the field cable pulled into the junction box To prepare the cable for termination a minimum of 7 inches of the cable outer jacket must be stripped off the cable This will allow for the stripping of approximately one inch from the various conductors and provide 6 inches of actual service loop cable In addition for EMI RFI protection the drain wire must be terminated to an earth ground wi
14. sinava over ZKINGS 4964 932 jacket and maka cuss I and 2 in jacket r Remova ackats to dimension A hare or bulge back and trim Eat regia al atge of jacket 11115 E WW 1964 4 Trim dimension ZI Exposed center conductor longi will bg aqu l to dimension DS vim codo t i 5 Solder or ow TO ooniaci TO cantar conductor DA For 19 5 20 KV connactors when Cabla Saal Gasket is supplied place over center comiuctar and agains cable eecht Soker contact 10 camer conductor wi jackal under compression gt o 6 Push K GRIP Jr aver dielectic chalectric bottoms in connectar When the E cimension in the trim coda is D the K GRIP dr is pushed under botn braid and jackal Teton jackets met be slit argik 1 4 in two places to taalitate entry of the K GRIP When center contact is yndorcia capio tyne insert cabia assembly untl nsulatar cetant locks into contact 7 Slide K GRIP sleov against shoulder on body and bore m hex Dy crimping 74 D 5 943 227 15 Digital Preamplifier Operator Manual AMP SHV COAXICON Plug Connectors 51426 208 2187 6 Side lerrule forward aver cable brald until it Is positioned against the shoulder of the plug body Crimp the derule using recommenced crimping tool Refer Ic the instruction sheal packaged with me tool tor specific orlmping instructions See Figure Crirpec C
15. A 200C UDE or the applicable Model 960 System manual 1 2 Application The Model 943 227 15 Digital Preamplifier is used with the Victoreen 942A 200C or Model 960 microprocessor based radiation monitors The Model 942A 200C or 960 system provides the 15 VDC preamplifier electronics power 500 VDC detector power and the RS232C serial communications support The digital preamplifier is available in two serial port configurations For applications less than 50 feet the Model 943 227 15 configured for RS232C communications is used For applications requiring signal transmission distances of up to 1 mile the Model 943 227 15VL configured for Victoreen Loop communications is used Table 1 1 is a list of available configurations and compatible 9XX series equipment Please contact Fluke Biomedical Radiation Management Services for additional information 943 227 15 Digital Preamplifier Operator Manual Table 1 1 943 227 15 Variations and Compatible Equipment Preamplifier Variations Application Detector Readout 943 227 15 Digital Transmission 943 27 31 Beta 942A 200C Digital Ratemeter Preamplifier Distances Detector or Model 960 Digital Process Less than 50 feet Current Mode Control System Operation 943 227 15VL Digital Transmission 943 27 31 Beta 942A 200C Digital Ratemeter Preamplifier Distances up to 1 Detector or Model 960 Digital Process mile Current Mode Control System Operation
16. Board instruction manual for further information Jumper JP1 controls the communication communications method employed JP1 A B selects Victoreen loop communications RS232C Communications 943 227 15 Communication between the detector preamplifier and the UDR or 960 controller may be performed via RS232C serial asynchronous communications interface Jumper JP1 controls the communication communications method employed JP1 B C selects RS232C communications 2 5 Preamplifier Switch amp Jumper Settings Switch and jumper settings for the preamplifier are summarized in Table 2 7 2 8 and 2 9 Table 2 7 Preamplifier Serial Interface Board 977 210 10M Switch Settings Normal Op Microprocessor Reset switch momentary contact A E SW2 N A Not supplied PENG vs reise SW3 3 Kae Selects Rate Mode normal Selects Maintenance Mode for factory PGA and Auto Zero set up only SW3 4 OFF OFF No function is implemented in the 977 210 10M NOTE SW3 is a 4 position DIP switch on the 977 210 10M serial interface board 2 5 943 227 15 Digital Preamplifier Operator Manual Table 2 8 Jumper Positions for Preamplifier Serial Interface Board 977 210 10M Setting Setting normal JMP2 INA Deleted Not Used N A Deleted Not Used Table 2 9 Jumper Positions for Preamplifier Electrometer Board 977 200 15M Jumper Normal Function Cal Function Setting Position JMP1 Normal Operation PGA Offset Adjust
17. Fold braid back over braid clamp and trim as shown above Remove dielactric to dimension B Cut center conductor to dimension C When cable positioning insulators are used adjust trim code dimensions as shown below and assemble as in dicated 6 For access type angle connectors solder center conductor in contact groove Close access opening SEMI SOLID DIELECTRIC TRIM CODE CHART EA 1001 11 16 D 8 Appendix E Modifications Appendix E Modification Sheets Engineering Instructions E 1 Modification Sheets Engineering Instructions P N Description 943 227 15VL M1 Modification consists of replacing the standard 8in H x 10in W x 4in D Enclosure with a 8in H x 10in W x 6in D Enclosure and replacing the field cable Seal Grip type entry fitting with a 2 0 in diameter sealed conduit fitting E 1 Blank page Blank page Fluke Biomedical 6045 Cochran Road Cleveland Ohio 44139 440 498 2564 www flukebiomedical com
18. IES OO EAE 4 2 Connector DESIONAIONS ci ia A 1 Connector Ba AGUA A 1 Applicable Drawing sr o B 1 ele ee ERT ne E ae ee nee lee B 1 Bill of M teri ls 2 22 C 1 Eleng Er EE C 1 Cable Termination Instructions a ea D 1 Cable Termination Instructions rr D 1 Modification Sheets Engineering Instructions aaa naa pe cn E 1 Modification Sheets Engineering Instructions ra E 1 Blank page General Information 1 General Description Section 1 General Information 1 1 General Description The Victoreen Model 943 227 15 Digital Preamplifier is designed to operate with the Model 943 27 Current Mode Beta Scintillation detector and the Model 942A 200C Series Digital Ratemeter UDR or the Model 960 Series Digital Process Control system When connected to the beta sensitive scintillation detector it comprises a monitoring system which operates in the range of 10 to 10 uCi cc or 1E9 to 1E Pico amperes The UDR provides display control and annunciator functions for the monitoring system The preamplifier contains a microprocessor controlled auto zeroing integrating electrometer a programmable gain amplifier an analog to digital converter and an asynchronous serial communications interface Communications with the UDR is accomplished via the optically isolated Victoreen Serial Communication Loop driver receiver circuitry Interconnection of the detector and preamplifier is accomplished utilizing two six 6 foot coaxial cables O
19. R bi CONTROL RX HIGH VOLTAGE ku 1 VL SIGNAL Figure 2 1 Typical Detector Electronics Block Diagram Table 2 1 Preamplifier Register Addresses Function Hex Address 2 2 Theory of Operation 2 Main Circuit Boards Table 2 2 Electrometer Control Bit Assignments Bit Position 0 Description o 1Gain 1 Gain 128 Unshort capacitor Short capacitor X Digitize electrometer Bear x x X x Digitize high voltage X Bit position does not matter 1 or 0 The integrating electrometer is formed by the combination of current source Z6 dual MOSFET Q4 operational amplifier 212 transistor Q3 and analog switch Z17 pin 15 Counter Z15 and ladder network RN3 form the auto zero portion of the integrating electrometer Refer to section 4 for auto zero adjustment instructions note this is a factory only adjustment Dual MOSFET Q4 acts as a low leakage input buffer to the electrometer C17 is an integrating capacitor while 217 pin 15 and Q3 are the shorting elements of the integrator There is a hysteresis built into the range changing function of the electrometer The range change up occurs at the decade points whereas the range change down occurs at 80 of the decade points This hysteresis results in the display of only two significant digits when in the upper 20 of a decade Whether or not this occurs depends on which direction the radiation level is trending An i
20. cation loop driver receiver the RS232 communications driver receiver and the communication loop fuses 2 3 977 200 15M Electrometer Refer to the electrometer schematic 977 200 18M located in Appendix B Z7 is a Texas Instruments TMS 70C00 microprocessor which is utilized to control detector operation Z8 latches port C of the microprocessor to form the lower order bits of memory address Z10 is a 27C64 EPROM containing the operational firmware for the detector Z18 is an optional RAM socket which is not utilized for this model detector Z9 is a decoder for the upper order address bits Z11 is a latch used to store control bits to select the gain of the programmable gain amplifier formed by the combination of Z5 Z4 and RN2 Available gains are 1 through 128 in binary increments 1 2 A 128 Z3 is an eight bit analog to digital converter used to digitize the output of the programmable gain amplifier Analog switch Z17 pin 11 selects either the integrating electrometer or the high voltage sense line as the input to the programmable gain amplifier is not active in this application Refer to Table 2 1 for preamplifier register addresses and Table 2 2 for electrometer control bit assignments 2 1 943 227 15 Digital Preamplifier Operator Manual 0 12 Vdc 0 10 Vdc ALARM INTEGRATING DA EPROM ANALOG SWITCH ONTROL E HIGH VOLTAGE ACIA POWER SUPPLY Resistor DETECTOR ASSEMBLY RS232 VICO TX LOOP Resistor TX MICROPROCESSO
21. d FAIL relay coils will de energize If power to the preamplifier only is lost or if there is a break in the power cable operation of the microprocessor will stop The display on the controller will then cease to update If power to the controller is not lost a break in the interconnecting wiring or the internal communication power fuses on the 977 210 10M Interface board should be checked Loss of power to the preamplifier will also result in a loop communication failure Loop Failure If the UDR or 960 controller does not receive a valid message from the preamplifier in ten seconds a loop failure is detected and an E0009 code will normally be displayed Note the error code displayed is defined by the controlling device and not by the preamplifier The loop failure can originate from bad seating of the serial communications board in the UDR or 960CD bad connections in the preamplifier bad connections at the P2 connector of the UDR a baud rate mismatch between the setting on the serial board and that in the preamplifier an invalid address setting on the serial board or blown communication loop fuses The baud rate of the preamplifier may be set to either 300 or 4800 baud SWS 1 on the 977 interface board must be in the ON position to select a baud rate of 4800 baud the normal setting 3 4 943 227 15 Digital Preamplifier Operator Manual For UDR systems the address of the 942 200 80 Communications board in the UDR must be set 4040
22. ents Troubleshooting includes a verification of the LED operation status the DC voltage levels and the loop communication loop fuses Victoreen Loop Communications only Specialized test equipment and firmware are required to adjust the auto zero and PGA subsystems in the electrometer H the test equipment and firmware is not available the unit should be returned to Fluke Biomedical RMS for re alignment 4 2 Appendix Connector Designations A A 1 CONNECTOR DESIGNATIONS Appendix A Connector Designations 943 227 15 and 943 227 15VL Table A 1 943 227 15 943 27 15VL Field Electrical Connections 943 227 15 and 943 227 15VL Description Connects To 977 210 10M Description Connects To 977 210 10M XMIT DTR GND REC Not Used Not Used 15 VDC Ground 15 VDC Not Used 2 3 4 5 6 7 8 9 o J4 1 J4 2 J4 3 J4 4 Not Used Not Used J3 7 J3 8 J3 4 Not Used VL 15 VDC TX TX VL RX RX Not Used Ground Not Used Not Used J3 1 J3 2 J3 3 J3 4 J3 5 J3 6 Not Used J3 8 Not Used J3 11 Detector Connections Detector Connections Detector MHV Detector BNC From Field coaxial cable Factory Terminated To 977 200 15M R41 Detector MHV Detector BNC From Field coaxial cable Factory Terminated To 977 200 15M R41 A 1 943 227 15 Digital Preamplifier Operator Manual
23. er Printed Circuit Board Schematic 977 200 15M Preamplifier Electrometer Board Assembly 977 200 18M Preamplifier Schematic B 2 Related Manuals Not Supplied with this document SXXXXXX 1 Applicable 960 Series system Manual 942A 200C M1 Digital Ratemeter 943 27 31 1 Current Mode Beta Detector B 1 Blank page Appendix C Bill of Materials Appendix C Bill of Materials C 1 Bill of Materials 943 227 15 and 943 227 15VL Part Number Description 943 227 15 Preamplifier Assembly RS232 943 227 15VL Preamplifier Assembly Victoreen Loop 943 227 15VL M1 Preamplifier Assembly Victoreen Loop w Conduit Hubs 977 210 10M Preamplifier HV Interface Printed Circuit Board Assembly 977 200 15M Preamplifier Electrometer Board Assembly C 1 Blank page Appendix D Cable Termination Instructions Appendix D Cable Termination Instructions D 1 Cable Termination Instructions The procedures and instructions provided in Appendix D are provided for reference in terminating the field cables to the Digital Preamplifier A mating SHV connector is provided with the preamplifier Ring lug terminals are to be provided by the user The instructions provided below are based on the use of P N 50 100 multi conductor cable For other customer supplied cables the same basic procedures modified for the specific cable used may be utilized Detector Cable Termination The detector high voltage and signal cables enter the preamplifier through
24. erial Interface Board 977 210 10M Normal Setting Alternate Setting Function JMP1 Enables Victoreen Loop Enables RS232C normal JMP2 Deleted Not Used Deleted Not Used Table 1 5 Jumper Positions for Preamplifier Electrometer Board 977 200 15M Normal Setting Function Cal Position Function JMP1 Normal Operation PGA Offset Adjust Programmable Gain Amplifier requires a special test PROM and is a factory adjustment General Information 1 Specifications Table 1 6 Field Electrical Connections 943 227 15 and 943 227 15VL 943 227 15 943 27 15VL Description Connects To 977 210 10M Description Connects To 977 210 10M 2 3 4 5 6 7 8 9 o XMIT DTR GND REC Not Used Not Used 15 VDC Ground 15 VDC Not Used J4 1 J4 2 J4 3 J4 4 Not Used Not Used J3 7 J3 8 J3 4 Not Used VL 15 VDC TX TX VL RX RX Not Used Ground Not Used Not Used J3 1 J3 2 J3 3 J3 4 J3 5 J3 6 Not Used J3 8 Not Used J3 11 Detector Connections Detector Connections Detector MHV Detector BNC From Field coaxial cable Factory Terminated To 977 200 15M R41 Detector MHV Detector BNC From Field coaxial cable Factory Terminated To 977 200 15M R41 Table 1 7 977 210 10M LEDs LED Indicates LED1 15 VDC is being supplied to the circuit board from the UDR when ON
25. ge of Fluke Biomedical instruments must comply with Level B storage requirements as outlined in ANSI N45 2 2 1972 Section 6 1 2 2 The storage area shall comply with ANSI N45 2 2 1972 Section 6 2 Storage Area Paragraphs 6 2 1 through 6 2 5 Housekeeping shall conform to ANSI N45 2 3 1972 Level B components shall be stored within a fire resistant tear resistant weather tight enclosure in a well ventilated building or equivalent Storage of Fluke Biomedical instruments must comply with the following 1 Inspection and examination of items in storage must be in accordance with ANSI N45 2 2 1972 Section 6 4 1 2 Requirements for proper storage must be documented and written procedures or instructions must be established 3 Inthe event of fire post fire evaluation must be in accordance with ANSI N45 2 2 1972 Section 6 4 3 4 Removal of items from storage must be in accordance with ANSI N45 2 2 1972 Sections 6 5 and 6 6 Blank Page Theory of Operation 2 Functional Description Section 2 Theory of Operation 2 1 Functional Description The Model 943 227 15 Digital Preamplifier is an eight decade linear reading radiation The preamplifier is sensitive to moisture and is mounted in aNEMA 4 sealed enclosure The preamplifier box contains a desiccant package to remove moisture from the interior of the preamplifier The desiccant has a color indicator to show when it should be replaced when the color changes to blue
26. hree terminal regulators VR3 and VR4 The 5 Vdc logic power is derived from the three terminal regulators VR1 and VR2 Power for the detector is normally provided by the electronic high voltage power supply in the associated Model 942A 200C UDR or Model 960 System The following LEDs are provided to indicate operation of certain functions of the 977 210 10M board Table 2 5 977 210 10M LEDs 15 VDC is being supplied to the circuit board from the UDR when ON Communications Receive ON bright both 15 and 15 volt loops present ON dim Only one loop supply present OFF no loop voltage from either supply The following Test are provided on the 977 210 10M board Table 2 6 977 210 10M Test points Test Point RS232 Transmit Theory of Operation 2 Communications Victoreen Communications Loop 943 227 15VL Communication between the detector preamplifier and the UDR or 960 controller may be performed via Victoreen loop a serial asynchronous communications interface The communication utilizes Victoreen protocol and is intended for use in electrically hostile environments where high noise immunity is required Noise immunity is achieved using differential line driving and electrically isolating the end of each transmit receive pair with opto isolators Using a 15 Vdc communications power supply each 0 to 1 transition is equivalent to a 30 volt swing in loop voltage Refer to the Model 942 200 80 1 Communications
27. ier is designed to operate for extended periods of time with no scheduled maintenance required Operation may be verified by periodically actuating the check source provided with the detector and sampling assembly and observing the response of the unit If the response varies by more than 50 of the normal value further troubleshooting may be required If a problem develops troubleshoot the unit per Section 4 3 and the drawings in Appendix B Whenever the preamplifier enclosure is opened the condition of the internal desiccant package should be checked The desiccant bag is provided in the enclosure to absorb moisture The desiccant bags should be checked for moisture absorption prior to placing into service or whenever the electronics enclosure cover is opened Each bag contains a color indicator stripe that turns red when it should be replaced 4 2 Electronic Calibration Electronic Adjustments There are no user adjustments available on the 943 227 15 Digital Preamplifier The Programmable Gain Amplifier and Auto Zero are factory adjustments requiring the use of a factory test PROM and test fixture We strongly recommend the unit be returned to the factory for repair or adjustment Table 4 2 lists the electronic adjustments for the 943 227 15 digital preamplifier The procedures for making these adjustments are contained in the factory Calibration Procedure listed below Note that special test firmware is required to perform the electrical ad
28. ies NOTE Dimensions on this s re kan ste are in milinoters ern inches ln brackets Figures are vol draw fo seats ALP sport Harristung PA IIOS TOOLING ASSISTANCE CENTER 3 00 Musing a step down fame side anto the cab a with tne smal opaning frst 1 Side ferrule onto unstipped cable nen strip eabie using he recommended stip length dmersion in Figure 2 DO NOT nick or cut cable braid Center conductor must be glraght and tree ol burrs 55314025 215 4 010 e Faso 4 1 ei Si LI EK 40 25 234 010 a 2062 0 25 512 010 NOTE Nat la Scale Figure 2 For conmoctors sappie wih luoki sko HO over ha cabo ditoci o arturo anpying ceruer contaci 2 insert cemer conductor into contact until the shoulder of the camact is against the innet dieteciric of te cable Refer lo Figure 3 3 Crimp center contact using ihe recommended crimping tool Reter to the instruction sheel packaged with the toci lor detailed camping instructions See Figure 3 4 Flare cable brald so that it Ms over and around ihe support sieeve ot the plug assembly Guru AMP FAXMPRDDUCT NFO 1 200 522 0752 102 The AP conobed kun is joa In change For aos kaiser cae tho AMP FAK rast our zug 1858 bp AMP area Al Rigins Reserved Tivelenare _ LOG amp Funn 624 2 1 56 Appendix Cable Termination Instructions D CABLING PROCEDURE CP 400 Kor SELEN cur i curd 1 Cuicatle end square slide K GRIP
29. ifier case is opened as the high impedance electrometer circuitry is easily damaged Do not leave the preamplifier enclosure in the open position for any extended period of time The preamplifier terminations are listed below Table 3 1 943 227 15 Preamplifier Electrical Connections 943 227 15 943 27 15VL Connects To Description Connects To 977 210 10M 977 210 10M J4 1 VL 15 J3 1 XMIT Ko DTR J4 2 TX J3 2 GND J4 3 TX J3 3 REC J4 4 VL J3 4 Not Used Not Used RX J3 5 Not Used Not Used RX J3 6 15 VDC J3 7 Not Used Not Used Ground J3 8 Ground J3 8 15 VDC J3 4 Not Used Not Used Not Used Not Used Not Used J3 11 Description 2 3 4 5 6 7 8 9 o Detector Detector Connections Connections From Field Detector From Field Detector MHV coaxial cable MHV coaxial cable Factory Factory Terminated Detector Terminated To 977 200 BNC To 977 200 15M R41 15M R41 Detector BNC 3 2 Set up To place the system in operation the following steps should be performed NOTE Ensure you have read and fully understand Section 1 2 and 3 prior to continuing 1 Verify that jumpers and DIP switches and jumpers on the preamplifier are set for the operational features desired Refer to Section 1 Table 1 4 2 Refer to the applicable controller manual prior to powering up the controller 3 2 943 227 15 Digital Preamplifier Operator Manual 3 3 Operation 3 Co
30. justments Table 4 1 Electronic Adjustments Potentiometer Adjustment 943 227 15 R11 Programmable Gain Amplifier Offset Adjustment 2 mV R12 Auto Zero Set Up Adjustment 10 mV NOTE Refer to the drawings in Appendix B to locate adjustment and or test points if required The follow factory calibration and test procedures are listed for reference only Document Description TP943 227 15VL Test Procedure Victoreen Loop Communications TP943 227 15 Test Procedure RS232 communications TP977 200 15M Electrometer PCB Test Procedure 4 1 943 227 15 Digital Preamplifier Operator Manual 4 3 Troubleshooting If a problem develops verify that the voltages at connection point inputs and outputs are present and that all wiring is secure Refer to Appendix B and C for drawings and parts lists If a PROM requires WARNING Extreme care must be used when troubleshooting a system that has power applied All standard troubleshooting precautions apply WARNING Once a problem has been located remove all power before continuing with the repair CAUTION Personnel performing the troubleshooting repair must be qualified to ANSI 45 2 6 1978 Skill Level Il Personnel performing the following procedure must be familiar with the operation of the monitoring system and the location of each piece of equipment used in the system replacement specify the board revision level when ordering the part Troubleshooting Adjustm
31. l Function Cal Function Setting Position JMP1 Normal Operation PGA Offset Adjust Programmable Gain Amplifier requires a special test PROM and is a factory adjustment Operation 3 Configuration 3 5 Set Point Error Codes Failure of the 943 227 17 preamplifier may result in the following error codes being displayed on the controlling device Code E0009 is normally used to identify a Loop communication failure The error code may be due to a baud rate mismatch between the preamplifier and the UDR or 960 system communication board a failure on either the preamplifier or UDR communication board To clear the error code the source of the error must be corrected 3 6 Software Calculations The 943 227 17 continuously converts the current output of the detector to a digital value controls the gain of the internal amplifier performs periodic self checks communicates with the UDR or Model 960 controller and provides a radiation value to the UDR of Model 960 An asynchronous serial communication interface processed through optically isolated drivers receivers is utilized The digital value is transmitted to the associated UDR or 960 System controller for further processing Refer to the associated controller manual for further information 3 6 Blank page Maintenance Calibration and Troubleshooting 4 Maintenance Section 4 Maintenance Calibration and Troubleshooting 4 1 Maintenance The 943 227 15 Digital Preamplif
32. n Section 4 Genter REVISION SUMMARY Contact Plug Body 2 DESCRIPTION Figure 1 Tre piug connectors consis of a plug body wilh bayonet lacking coupling a center caniact anc ferrule Some connectors ate supplied wilh a Slep Down alap down ferrule and a iubing The tubing is slipped Feru over the cable die eatric before tha cemer contact is crimped In this use the tubing compenaeles for a d smal diameter cable dielectrics Ga A 3 ASSEMBLY PROCEDURE Tubing NOTE Some CN are supplied a stop TN farse When assembling the siep doam lerule over Ne cable drai make swe he lame aameterend faces the pivo body Figure 1 INTRODUCTION This instruction sheet covers the assembly 01 AMP SHV COAXICON Plug Dual Crimp Type Sonmeciors 51426 1 designed la provide shiekied disconnects toe high voltage applications The plug conneciors accept a wide range of vosxial cables and can De unmped using AMP Double Action Hand Toni 220022 1 408 6872 PRO CRIMPERS il Hand Too Frame 3549401 408 9230 lined with appropriate de assen d Hard Crimping Tool 69719 1 208 2035 or 626 Phevmatic Tooling Assemblies 189721 1 ar 189 2224 fines wilh appropriate tool holder or ade pler crimping head en de set 409 5852 Fora cross reference 01 connacdor to cabie and applicable tools and die assemblies reter lo AMP Calaluy 82074 For detailed inicrmation on the fooling reler jo the appicable instructions 403 or 409 ser
33. ncreasing trend will result in three significant digits while a decreasing trend will result in two significant digits The response times for a change in reading within the same decade are listed in Table 2 1 If a change of 100 to 1000 times the current reading occurs the instrument will range change within a single 50 millisecond clock cycle Table 2 3 Response Time RANGE RESPONSETIME 2 3 943 227 15 Digital Preamplifier Operator Manual The following Test are provided on the 977 200 15M board Table 2 4 977 200 15M Test Points 12 VDC supply From 977 210 10M DC Ground Programmable Gain Amplifier Output 2 4 977 210 10M Interface Board Refer to the Communications Interface P N 977 210 13M schematic diagram in Appendix B U12 is an asynchronous communications interface adapter ACIA which communicates with the UDR or 960 system U1 is an analog switch used to select either the Victoreen loop or the RS232 driver receiver for external communications Optical isolation U10 isolates data transmitted on the Victoreen loop while the circuitry comprised of Q6 Q7 Q14 and Q18 are the actual loop drivers Optical isolator U8 isolates the receive data from the Victoreen loop U2 and U3 are respectively the receiver and driver circuits for the RS232 port U14 decodes address block A000 to provide chip enables to the ACIA switch input register U6 Regulated power for the electronics 12 VDC is derived from t
34. ne cable supplies the high voltage for the detector negative polarity The other cable is used for the detector output signal Interconnection between the preamplifier and the UDR or 960 system is accomplished via a six conductor cable and a high voltage coaxial cable The detector operates at a potential of approximately 500 VDC and produces a nominal DC output current of 1 x 101 amperes to 1 x 10 amperes Depending on sampling geometry and detector set up this corresponds to a range of 1 x 10 to 1 x 10 uCi cc The preamplifier is a self contained electronics unit that processes the DC input signal from the detector digitizes the signal and transmits the digitized value to the readout via a modified RS232C compatible serial data communication port It contains two printed circuit boards mounted on the rear of the enclosure cover a terminal block for terminating the field cable from its associated controller and two connectors for terminating the detector Signal and HV coaxial cables The larger of the two printed circuit boards is the 977 210 10M Serial Interface board This board controls the communications with the controller The smaller board is the 977 200 15M Electrometer It contains the microprocessor and associated circuitry for converting the detector output current into a digital value For additional information on the detector or readout device refer to the instruction manual for the Model 943 27 31 detector the Model 942
35. nfiguration 3 3 Operation Operation of the 943 227 15 Digital Preamplifier is automatic and is controlled by the Model 942A 200C Digital Ratemeter or Model 960 Digital Process Radiation monitoring system Once the power to the controlling device is turned on the preamplifier begins operation No operator interaction is required Refer to the instruction manual for the applicable controller detector and the Model 942 200 80 Communications Option Board for further information Normal Operation If the measured radiation field is within the range of the detector during power up the uCi cc value will be displayed on the controller The digital display will update once per second Alarms The radiation alarms are initiated by the applicable controller Refer to the applicable controller manual Fail Alarm There are two equipment failure conditions that can produce a FAIL output or an error display on the associated controller The fail condition is true whenever any equipment failure is detected and false when no equipment failures are detected The following are the fail alarms provided by the 943 227 15 Preamplifier 1 POWER Failure 2 Loop Test Failure To return the channel to normal operation after a FAIL alarm the condition which caused the alarm must be located and corrected Power Failure If the power to the controller is lost the bar graph alarm indicators and the display are blanked turned off The HIGH WARN an
36. ontact Fernie Positlaned Against Shoulder of Plug Body and Crimepad Shoulder af Contact Against hner Deia of Gable Figure 3 5 Insert crimped contact into plug cody until it snape into place Maka sure that the cable braid is positioned aver the connector support sleeve Pull back gently on the cable to ensure that the contact is held in place by the Internal locking feature Ses Figura 4 Figure 5 Cable Erelid Over 4 REVISION SUMMARY Steel Sleeve Since the previous release of this shnel the following changes were made Per EC 0990 1112 98 Added tubing and step down ferrule in Figure 1 Acced noles regarding tubing and slep down ferrule to Sections 2 and 3 Updated erenping tools In Section 1 Crimpad Contact Postioned in Fig Body Figure 4 D 6 Appendix D Cable Termination Instructions CH E H Su B0 F2 KINGS CABLING PROCEDURE CP 1000 CLAMP NUT SLIP WASHER WHEN SUPPLIED 1 Cut cable end square place clamp nut siip washer when supplied and gasket over jacket Remove jacket to dimension A BRAID CLAMP 2 Comb out braid and taper forward Piace braid clamp over braid against jacket cut 3 Fold brald back over braid clamp and trim as shown above Remove dielectric to dimension B Cut center conductor to dimension C When cable positioning insulators are used adjust trim code dimensions as shown below and assemble
37. thin the enclosure The length of the drain wire will be based on the distance between the UDR rear panel and the ground location The length of cable jacket to be stripped will then be based on the distance to the drain wire grounding point Once the cable outer jacket is stripped to the proper length the aluminum tape shield and Mylar binder may be removed taking care not to damage the No 20 AWG drain wire The drain wire may then be separated from the remaining conductors for routing and termination at the grounding point Next the HV coaxial cable may be separated from the bundle followed by the single conductors wires that are required for the specific application and the polyester filler cord Refer to the project specific detector loop drawing or the generic detector loop drawing provided in Appendix B for actual conductors to be used The ring lug connectors may now be applied to the single conductor cables and installed in accordance with the project electrical loop diagram Trim each conductor as required to reach its assigned terminal point Allow a minimum of 1 in spare conductor for future re termination Because of the unique requirements of each installation terminal lugs for the detector single conductor terminations are not included and are supplied by the user Ring terminal Crimp type lugs Burndy YAE type sized for the 18 AWG wire or equivalent are recommended The terminal block is designed to accept a maximum 14 AWG
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