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Model 2363

Technical

Manual

Section 7

Ludlum Measurements, Inc.

Page 7-

4

January 2015

This command sets the specified header. The variable “x” can be any number

between 1 and 6. The variable “y” can be up to 15 characters. The length of
the command is 20 characters, including a [CR] and [LF].

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Содержание 2363

Страница 1: ...LUDLUM MODEL 2363 GAMMA NEUTRON SURVEY METER October 2015 Serial Number 220855 and Succeeding Serial Numbers ...

Страница 2: ...LUDLUM MODEL 2363 GAMMA NEUTRON SURVEY METER January October 2015 Serial Number 220855 and Succeeding Serial Numbers ...

Страница 3: ...ontrols and Functions 4 Operator Controls 4 1 Internal Controls 4 2 Safety Considerations 5 Environmental Conditions for Normal Use 5 1 Cleaning Instructions and Precautions 5 1 Warning Markings and Symbols 5 2 Calibration and Maintenance 6 Calibration 6 1 Meter Calibration 6 1 Establishing an Operating Point 6 2 Maintenance 6 3 Recalibration 6 3 Batteries 6 4 RS 232 Interface 7 Communicating With...

Страница 4: ...erface Software 7 14 Removal of the Model 2363 Interface V2 7 14 Connecting to a Computer 7 14 Technical Theory of Operation 8 Troubleshooting 9 Recycling 10 Parts List 11 Model 2363 Gamma Neutron Survey Meter 11 1 Main Board Drawing 390 295 11 1 LED Board Drawing 390 299 11 4 LCD Display Board Drawing 390 170 11 4 Wiring Diagram Drawing 390 290 11 4 Drawings and Diagrams 12 ...

Страница 5: ...e in neutron measurements This instrument incorporates a long arc length analog meter face which normally displays exposure rates from 0 to 10 mrem hr The instrument s digital display is a full six digit liquid crystal display LCD with an arrow symbolfor counting overflow The displayis direct drivenforoptimalviewing and wide temperature response The Model 2363 range selector switch allows for mult...

Страница 6: ...o alarm The alarms will continue until the RESET toggle switch is depressed or until the INTEGRATED DOSE is zeroed The Model 2363 communicates through an RS 232 port located on the instrument can The computer interface software is supplied on CD and includes the following functions Downloading of header and logged data into an ASCII file Setting and reading of instrument parameters Setting of the ...

Страница 7: ...ant If multiple shipments are received ensure that the detectors and instruments are not interchanged Each instrument is calibrated to specific detectors and therefore not interchangeable To return an instrument for repair or calibration provide sufficient packing material to prevent damage during shipment Also provide appropriate warning labels to ensure careful handling Include detector s and re...

Страница 8: ... center pin of the input connector Switch the Model 2363 to the OFF position before connecting or disconnecting the cable or detector Connect oneend of a detector cable to the detector by firmly pushing the connectors together while twisting clockwise a quarter of a turn Repeat the process in the same manner with the other end of the cable and in the instrument Battery Test The batteries should be...

Страница 9: ...ting off both visual and audible alarms Proceed with use Principle of Operation The detected neutron count rate is displayed by selecting the N position on the three position N N G G toggle switch Similarly the sumofthe neutron and gamma count rate or the gamma count rate only is displayed by selecting the appropriate N G or G position The digital display will show a direct reading in dose rate Mu...

Страница 10: ...r with Model 42 41L Thresholds Gamma threshold is fixed at 50 millivolts mV Neutron threshold is adjustable from 5 to 100 mV Neutron High Voltage internally adjustable from 500 to 1500 Vdc Gamma High Voltage fixed at 550 Vdc Linearity within 10 of true value for the analog rate meter 2 for the LCD Response Time 0 1 range multiplier 7 seconds 1 7 seconds 10 2 seconds 100 2 seconds all response time...

Страница 11: ...digit direct driven with 6 4 mm characters and a counter overflow arrow Connector series C standard others available Power two standard D size batteries Battery Life 200 hours of operation with a fresh set of alkaline D cell batteries Temperature Range Neutron 30 from 0 to 40 C 32 to 104 F PRESCILA Gamma 10 from 20 to 50 C 4 to 122 F internal GM Size including connector protrusion Without PRESCILA...

Страница 12: ...ull scale for about two seconds and then return to 0 The LCD will show 88 8 8 8 8 display the current sample number and then 0 If the count button is pressed while the display is showing all 8s then the following numbers are shown firmware number date time neutron rate meter alarm gamma rate meter alarm neutron gamma rate meter alarm integrated dose alarm current sample number and then 0 Liquid Cr...

Страница 13: ...lding this switch in the ID position while turning the instrument on Log Pushbutton located in the carrying handle When pressed the instrument stores the current readings into non volatile memory Internal Controls Remove the instrument cover can to access the following dipswitches on SW1 Dipswitch1 This switch when placed in the ON position enables calibration due date The date is entered in Month...

Страница 14: ...h when placed in the ON position disables auto dump to the RS 232 port See page 7 6 command SM for more information on auto dump Remove the instrument cover to access the following calibration potentiometers MTR a multi turn potentiometer used to calibrate the meter to the cpm reading NHV a multi turn potentiometer used to adjust the neutron high voltage from 500 to 1000 Vdc NTHR a multi turn pote...

Страница 15: ...age of 1500 Vdc Pollution Degree 3 as defined by IEC 664 Occurs when conductive pollution or dry nonconductive pollution becomes conductive due to condensation This is typical of industrial or construction sites Cleaning Instructions and Precautions The Model 2363 Gamma Neutron Survey Meter may be cleaned externally with a damp cloth using only water as the wetting agent Do not immerse the instrum...

Страница 16: ...ote the following precautions Warning The operator is strongly cautioned to take the following precautions to avoid contact with internal hazardous live parts that are accessible using a tool 1 Turn the instrument power OFF and disconnect the power cord 2 Allow the instrument to sit for one minute before accessing internal components CAUTION RISK OF ELECTRIC SHOCK per ISO 3864 No B 3 6 designates ...

Страница 17: ...e Model 2363 with the appropriate cable Rotate the Model 2363 range selector switch to the 100 position Select the N channel position Adjust the pulser for 400 cpm and the pulse amplitude to 20 mV Connect the instrument to a computer using a straight thru 9 pin cable Using the Ludlum Model 2363 interface software adjust SE10001 for 1 cpm per mrem hr Remove the instrument cover and adjust the MTR p...

Страница 18: ...s an outline of this procedure 1 Using the Ludlum Model 500 pulser or equivalent adjust the neutron threshold NTHR of the Model 2363 to 10 mV and set the HV NHV to 635 Vdc 2 Connect the Model 42 41 PRESCILA to the Model 2363 with a 0 99 m 39 in cable Using the front face of the detector as the detector reference point not the center of the detector point the detector at the source Ensure that all ...

Страница 19: ... the Model 2363 to a 137 Cs range and change the selector switch to G gamma only Adjust the gamma calibration constant and dead time correction to calibrate the meter within 10 at the following fields 2 and 5 mR hr 20 and 50 mR hr and 200 and 500 mR hr Maintenance Instrument maintenance consists of keeping the instrument clean and periodically checking the batteries and the calibration The Model 2...

Страница 20: ...s who choose to calibrate their own instruments Batteries The batteries should be removed any time the instrument is placed into storage Battery leakage may cause corrosion on the battery contacts which must be scraped off and or washed using a paste solution made from baking soda and water Use a spanner wrench to unscrew the battery contact insulators exposing the internal contacts and battery sp...

Страница 21: ...a bits No parity 1 stop bit Commands The following table shows all the commands used to communicate with the Model 2363 All commands must be in uppercase letters The data can be in either upper or lower case All set commands should return OK a carriage return and line feed Read Commands RA Read sample number RC Read calibration date RD Read date REx Read efficiencycal constant RHx Read header RI R...

Страница 22: ...Thhmm Set current time S1xxxxxx Set neutron Rate meter alarm S2xxxxxx Set gamma rate meter alarm S3xxxxxx Set neutron gamma rate meter alarm S4xxxxxx Set neutron gamma integrated dose alarm Command Descriptions RA This command reads the current sample number The output is six characters including a CR and LF The format is 0001 CR LF RC This command reads the calibration date During power up the Mo...

Страница 23: ...tput is six characters including a CR and LF The format is 1000 CR LF RHx This commandreads the specifiedheaderwhere x equals a numberbetween 1 and 6 The output is 17 characters including a carriage return CR and line feed LF 15 characters John Smith CR LF RI This command reads the time constant The output is four characters including a carriage return CR and line feed LF 02 CR LF RL This command ...

Страница 24: ...3 12 18 05 14 31 12 011265 000000 R D 032090 Table 007 0004 12 18 05 14 31 16 010410 000000 R D 032090 Table 007 0005 12 18 05 14 31 20 011175 000000 R D 032102 Table 007 RT This command reads the current time constant for the neutron and gamma channels The output is seven characters including a CR and LF The format is 02 02 CR LF R1 R2 R3 R4 These commands read the alarm setpoints The gamma and n...

Страница 25: ...epresent the year The variable z must correspond to the following table The length of the command is 13 characters including a CR and LF Year ending in Year Code 96 0 97 1 98 2 99 3 00 0 01 1 02 2 03 3 04 0 05 1 06 2 07 3 08 0 09 1 10 2 For example the command to set the date to November 20 1996 is SD112019960 CR LF SExyyyy This command sets the neutron or gamma efficiencycal constant If x 1 the n...

Страница 26: ...udlum Measurements Inc Page 7 4 January 2015 This command sets the specified header The variable x can be any number between 1 and 6 The variable y can be up to 15 characters The length of the command is 20 characters including a CR and LF ...

Страница 27: ... in length The length of the command is 14 characters including a CR and LF The format is SLTABLE007 CR LF SMx This command disables or enables the automatic dumping of the rate meter when the Model 2363 is set not to log samples SpecifingSpecifying SM0 will disable the rate meter dumping until the unit is turned off or the command SM1 is issued SPxxx This command sets the paralyzed time in micros...

Страница 28: ...0 7 00 pm 1900 8 00 am 0800 8 00 pm 2000 9 00 am 0900 9 00 pm 2100 10 00 am 1000 10 00 pm 2200 11 00 am 1100 11 00 pm 2300 The length of the command is eight characters including a CR and LF For example the command to set the time to 1 00 pm is ST1300 CR LF S1 S2 S3 S4 These commands set the alarms for the neutron gamma and neutron gamma rate meterandalso the neutron gamma integrateddose Ifthealar...

Страница 29: ...t in word processors spreadsheets or other applications Version 1 4 4 and higher support the 2363 4 39063n14 firmware which has a decimal place for the calibration constants Functions The Model 2363 Interface program has three main functions 1 Allows user to read or update the header information stored in the Model 2363 2 Allows user to read save or delete the logged data stored in the Model 2363 ...

Страница 30: ...Model2363 Technical Manual Section7 Ludlum Measurements Inc Page 7 4 January 2015 The data will be lost if the logged data has not been previously saved ...

Страница 31: ... the original state as shipped from LMI Save Log Data displays the save file prompt to allow the user to specify which drive and directory to save the log file Save Log Data With Headers displays the save file prompt to allow the user to specify which drive and directory to save the log file The six header fields will be added to the top of the save file Print sends data including the log data to ...

Страница 32: ...ust be set to the OFF position The auto dump data screen allows the user to capture real time data coming from the Model 2363 The Model 2363 outputs the data every two seconds which is captured and recorded to the grid After capturing the data it may be saved to a file or printed to the default printer Note Neutron and gamma counts are in mrem hr Integrated dose counts are in mrem ...

Страница 33: ...xtbox it will not take effect until the current count time is finished It will then start the new count time Note A 0 or 1 will not be allowed in this text box Turn ON Turn OFF Toggle from ON OFF to start or stop the Auto Data Dump Clear clears data from the grid Note This does NOT clear memory in the Model 2363 Save Log Data displays the save file prompt to allow the user to specify which drive a...

Страница 34: ...60 0 00 3121 7 12 12 2005 01 34 36 PM 132 48 0 00 3121 7 12 12 2005 01 34 38 PM 132 48 0 00 3121 7 12 12 2005 01 34 40 PM 132 48 0 00 3121 7 12 12 2005 01 34 42 PM 139 56 0 00 3123 0 12 12 2005 01 34 44 PM 134 72 0 01 3123 0 12 12 2005 01 34 46 PM 133 18 0 03 3123 0 12 12 2005 01 34 48 PM 132 68 0 02 3123 0 12 12 2005 01 34 50 PM 132 54 0 02 3123 0 12 12 2005 01 34 52 PM 132 50 0 00 3123 0 12 12 2...

Страница 35: ...mma Time Constant 2 Neutron Alarm Setpoint 1000 00 mrem hr Gamma Alarm Setpoint 2000 00 mrem hr Neutron Gamma Alarm Setpoint 3000 00 mrem hr Integrated Dose Alarm Setpoint 4000 0 mrem Neutron EfficienyCal Constant 1111 cpm mrem hr Gamma EfficiencyCal Constant 2222 cpm mrem hr Neutron and Gamma counts are in mrem hr Integrated Dose counts are in mrem S Scaler R Rate meter C CPM D Dose Integrated Sa...

Страница 36: ...rom the list and highlight then press the add remove button to start uninstall Setup will prompt to make sure removal of program LMI 2363 Interface is okay Setup installed shared files and will prompt if you wish to keep remove remove none or remove all Files can be removed since they are installed in C Program Files Model 2363 and should not cause any problems The uninstall screen appears and the...

Страница 37: ...through R47 Neutron Transistor pairs U11 and U12 form the charge sensitive amplifier U14 comparator with 0 23 Vdc threshold produces negative going 5 volt pulses for every valid neutron pulse One shot U15B produces single pulses for each event Neutron HV Switching of U18 sends 5 volt pulses through step up transformer T3 Diode and capacitor multiplying ladder produces high voltage regulated by fee...

Страница 38: ... cables 2 sticky meters and 3 battery contacts Note that the first troubleshooting tip is for determining whether the problem is with the electronics or with the detector A Ludlum Model 500 Pulser can be invaluable at this point because of its ability to simultaneously check high voltage input sensitivity or threshold and the electronics for proper counting We hope these tips will prove to be help...

Страница 39: ...r is used to check the HV ensure that one with high impedance is used as a standard multimeter could be damaged in this process 2 Check for noise in the detector cable by disconnecting the detector placing the instrument on the lowest range setting and wiggling the cable while observing the meter face for significant changes in readings 3 Check for sticky meter movement Does the reading change whe...

Страница 40: ...continued POSSIBLE SOLUTION 3 Open the instrument can and check for loose wires 4 Ensure that the instrument s can is properly attached When attached properly the speaker will be located on the left side of the instrument If the can is on backwards interfer ence between the speaker and the input preamplifier may cause noise ...

Страница 41: ... simply desires to inform its consumers of the range of recyclable materials present in its products so that the user will have flexibility in following all local and federal laws The following types of recyclable materials are present in Ludlum Measurements Inc electronics products and should be recycled separately The list is not all inclusive nor does it suggest that all materials are present i...

Страница 42: ...50V 04 5741 C9 100pF 3KV 04 5735 C10 0 01µF 50V 04 5741 C11 C12 4 7µF 25V 04 5653 C13 C16 10µF 25V 04 5655 C17 47µF 10V 04 5666 C18 C19 27pF 100V 04 5658 C20 C21 10pF 100V 04 5673 C22 4 7pF 200V 04 5787 C23 0 01µF 50V 04 5741 C24 1µF 16V 04 5701 C25 0 01µF 50V 04 5741 C26 1µF 16V 04 5701 C27 0 01µF 50V 04 5741 C28 C29 47pF 100V 04 5660 C30 100pF 3KV 04 5735 C31 C32 0 001µF 2KV 04 5703 C33 C48 0 01...

Страница 43: ...06 6292 U9 CMXT3904 X1A 05 5888 U10 CMXT3906 05 5890 U11 CMXT3904 X1A 05 5888 U12 CMXT3906 05 5890 U13 U14 MAX985EUK T 06 6495 U15 CD74HC4538M 06 6297 U16 LT1304CS8 5 06 6434 U17 U18 LT1304CS8 06 6394 CR1 CR2 MMBD914LT1 07 6353 CR3 CR12 CMPD2005S 07 6468 CR13 CMSH1 40M 07 6411 D1 D2 CMSH1 40M 07 6411 SW1 90HBW08 8 POS 08 6711 R36 5K 3269W1 502 MTR 09 6918 R53 50K 3269W1 503 NTHR 09 6954 R55 1M 326...

Страница 44: ...0 R42 4 75K 1 4W 1 12 7858 R43 3 32M 1 8W 1 12 7967 R44 R45 4 75M 1 4W 1 12 7995 R46 4 75K 1 4W 1 12 7858 R47 R48 500M 3KV 2 12 7031 R49 68 1K 1 8W 1 12 7881 R50 NOT USED R51 22 1K 1 4W 1 12 7843 R52 121K 1 8W 1 12 7014 R54 402K 1 8W 1 12 7888 R56 R57 1K 1 4W 1 12 7832 R58 3 3M 1 4W 5 10 7044 RN1 RN2 220K 12 7923 P1 1 640456 1 MTA100x11 13 8059 P2 640456 6 MTA100x6 13 8095 P3 1 640456 4 MTA100x14 ...

Страница 45: ...U101 AY0438 I L 06 6358 DS001 NOT USED DS201 NOT USED B1 B2 MN1300 1 5V 21 9313 R1 10K NON LOCKING VOLUME 09 6753 J1 1 640456 1 MTA100 11 MAIN BOARD 13 8059 J2 640456 5 MTA100 5 MAIN BOARD 13 8057 J3 1 540456 4 MTA100 14 13 8141 J4 J5 640456 4 MTA100 4 13 8088 J6 640456 9 MTA100 9 13 8094 J7 JACK 09 9011 1 419 J9 DETECTOR UG706 U DS1 UNIMORPH 21 9251 LED Board Drawing 390 299 DIODES RESISTORS CONN...

Страница 46: ...CH PA 600 210 4P 5P RANGE SELECTOR S3 COUNT HNDL BUTTN S4 HEADPHONE JACK ON CAN TINI 42 21 9333 S5 TYPE SELECT S6 READ INT DOSE M1 Meter Assembly 4390 303 MODEL 2363 Interface Software 1370 072 Model 2363 Meter Face 7390 294 Model 42 41 Probe Sleeve Assy 4390 321 Model 2241 2 RLLD Handle Assy 4408 178 SWITCHES MISCELLANEOUS ...

Страница 47: ... BOARD Drawing 390 295 4 sheets PROCESSOR BOARD COMPONENT LAYOUT Drawing 390 296 2 sheets LCD DISPLAY BOARD Drawing 390 170 LCD DISPLAY BOARD COMPONENT LAYOUT Drawing 390 171 2 sheets LED BOARD Drawing 390 299 LED BOARD COMPONENT LAYOUT Drawing 390 300 2 sheets WIRING DIAGRAM Drawing 390 290 Section 12 ...

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