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Summary of Contents for Ludlum Measurements 2363
- Page 1 LUDLUM MODEL 2363 GAMMA-NEUTRON SURVEY METER October 2015 Serial Number 220855 and Succeeding Serial Numbers...
- Page 2 LUDLUM MODEL 2363 GAMMA-NEUTRON SURVEY METER October 2015 Serial Number 220855 and Succeeding Serial Numbers...
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Page 4: Table Of Contents
Cleaning Instructions and Precautions Warning Markings and Symbols Calibration and Maintenance Calibration Meter Calibration Establishing an Operating Point Maintenance Recalibration Batteries RS-232 Interface Communicating With the Model 2363 Commands Read Commands Set Commands Command Descriptions Ludlum Measurements, Inc. October 2015... - Page 5 Technical Manual Model 2363 Interface Software Functions Main Screen Auto Dump Data 7-10 Installation of the 2363 Interface Software 7-14 Removal of the Model 2363 Interface V2 7-14 Connecting to a Computer 7-14 Technical Theory of Operation Troubleshooting Recycling Parts List...
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Page 6: Introduction
The display is direct-driven for optimal viewing and wide temperature response. The Model 2363 range selector switch allows for multiplication ranges of ×0.1, ×1, ×10, and ×100, and a front-panel three-position toggle switch is used for selecting display of neutron, gamma, or neutron + gamma levels. - Page 7 RESET INTEGRATED DOSE 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 ...
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Page 8: Getting Started
The Model 2363 serial number is located on the front panel below the battery compartment. Most Ludlum Measurements, Inc. detectors have a label on the base or body of the detector for model and serial number identification. -
Page 9: Connecting A Detector To The Instrument
) is supplied to the detector via the detector input connector. A mild electric shock may occur if you make contact with the center pin of the input connector. Switch the Model 2363 to the position before connecting or disconnecting the cable or detector. -
Page 10: Operating The Instrument
Model 2363 Technical Manual Section 2 Operating the Instrument Connect a detector to the instrument if you have not already done so. Obtain a meter reading from a check source or calibrated source, if available. Verify that the reading falls within the expected range. Remove the source. If a radiation source is available, increase the meter count to exceed the alarm threshold. -
Page 11: Specifications
Model 2363 Technical Manual Section 3 Section Specifications Ranges : four linear range multiples of ×0.1, ×1, ×10, and ×100; used in combination with the 0-10 mrem/hr meter dial, providing an overall range of 0-1000 mrem/hr Gamma Energy Range : 60 keV to 3 MeV : ≤... - Page 12 Model 2363 Technical Manual Section 3 : four separate alarms set through the RS-232 port, Alarm points activating the alarm audio tone and lighting the appropriate LEDs; marked , or . The four alarm points can be set GALARM NALARM...
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Page 13: Description Of Controls And Functions
Model 2363 Technical Manual Section 4 Section Description of Controls and Functions Operator Controls OFF/BAT/X100/X10/X1/X0.1 Switch (or Range Selector Switch): a six- position rotary switch to select the analog meter range multipliers and check the battery status. When switched to the ˝... -
Page 14: Internal Controls
The date is entered in Month/Day/Year format. During power-up the Model 2363 checks to see if the current date is past the calibration due date. If it is, then the Model 2363 displays ˝ ˝... - Page 15 Model 2363 Technical Manual Section 4 the only audible tones in the ˝ ˝ channel selection, and gamma pulse tones are the only audible tones in the ˝ ˝ channel selection. SWITCH 2 TONE MODE DUAL SINGLE Dipswitch 3 : This switch, when placed in the position, disables auto- dump to the RS-232 port.
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Page 16: Safety Considerations
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 instrument in any liquid. Observe the following precautions when cleaning: 1. -
Page 17: Warning Markings And Symbols
Ludlum Measurements, Inc. The Model 2363 Gamma-Neutron Survey Meter is marked with the following symbols: CAUTION (per ISO 3864, No. B.3.1): designates hazardous live voltage and risk of electric shock. -
Page 18: Calibration And Maintenance
It must be adjusted to ˝0˝ with selector switch in the position. Connect the Model 500 Pulser to the Model 2363 with the appropriate cable. Rotate the Model 2363 range selector switch to the ×100 position. Select the ˝... -
Page 19: Establishing An Operating Point
(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. -
Page 20: Maintenance
Maintenance Instrument maintenance consists of keeping the instrument clean and periodically checking the batteries and the calibration. The Model 2363 instrument may be cleaned with a damp cloth (using only water as the wetting agent). Do not immerse instrument in any liquid. Observe the following precautions when cleaning: 1. -
Page 21: Batteries
Check the appropriate regulations to determine required recalibration intervals. Ludlum Measurements offers a full-service repair and calibration department. We not only repair and calibrate our own instruments but most other manufacturers’ instruments. Calibration procedures are available upon request for customers who choose to calibrate their own instruments. -
Page 22: Rs-232 Interface
Section 7 Section RS-232 Interface Communicating with the Model 2363 The Model 2363 has an RS-232 serial port that can be connected to a PC or other RS-232 device. The proper communication settings are (38400,8,N,1): 38400 Baud 8 data bits... -
Page 23: Set Commands
[CR][LF] 0001 This command reads the calibration date. During power up the Model 2363 checks the current date against this date. If the current date is past the calibration date, the message “OUTCAL” is displayed and the Model 2363 is disabled until the calibration date is changed ahead of the current date. - Page 24 Model 2363 Technical Manual Section 7 This command reads the current date and time. The output is 21 characters including a [CR] and [LF]. The format is : HH:MM:SS MM/DD/YYYY 16:16:29 11/20/1996[CR][LF] This command reads the specified calibration constant where if x = 1, the neutron cal constant is returned.
- Page 25 Day Year format.” During power-up the Model 2363 checks to see if the current date is past the calibration due date. If it is, then the Model 2363 displays “OUTCAL” and is disabled until this command is issued to set the Ludlum Measurements, Inc.
- Page 26 Model 2363 Technical Manual Section 7 calibration date ahead of the current date. The length of the command is 12 characters, including a [CR] and [LF]. The format is: SC11201997[CR][LF] Sdmmddyyyyz This command sets the current date. The date is entered in “Month Day Year”...
- Page 27 This command disables or enables the automatic dumping of the rate meter when the Model 2363 is set not to log samples. Specifying SM0 will disable the rate meter, dumping until the unit is turned off or the command SM1 is issued.
- Page 28 Model 2363 Technical Manual Section 7 This command resets the sample number to one, which will effectively erase all samples stored in memory. Use this command with caution. The format SR[CR][LF] SThhmm This command sets the current time in military format. Military time is as...
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Page 29: Model 2363 Interface Software
Model 2363. The Model 2363 Interface features include Load Defaults and Auto Dump Mode Display. When the program is started, it searches for a Model 2363 attached to any valid serial com port. Once found, it will download all data from the Model 2363, which includes Headers and Logged Data. - Page 30 Model 2363 Technical Manual Section 7 [Reload All Data]—downloads all information from the Model 2363. If there are logged samples, the user is prompted to download them after all the parameters have been retrieved. [Load Defaults]—reloads all header data to the original state as shipped from LMI.
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Page 31: Auto Dump Data
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. - Page 32 Options 1/2-Second Counts—displays current readings every 1/2 second in the grid. In this mode, the readings are the actual counts from the Model 2363. No averaging is preformed. 60-Second Counts—Allows the user to determine the count time from 2 to 9999 seconds.
- Page 33 Model 2363 Technical Manual Section 7 Table 1: Sample File: LogData.log Neutron and Gamma counts are in mrem/hr. Integrated Dose counts are in mrem. S=Scaler, R=Rate meter, C=CPM, D=Dose Integrated Sample # Date Time Neutron Gamma Dose Location -------- ----------...
- Page 34 Header 5: RM 008, S. Wall Header 6: Location: Table 007 Calibration Due Date: 12/12/2006 Model 2363 Date: 12/19/2005 Model 2363 Time: 01:46:13 PM Logged Samples: Paralyzed Time: 100 µSeconds Time Constant Setpoint: Current Neutron Time Constant: Current Gamma Time Constant: Neutron Alarm Setpoint: 1000.00 mrem/hr...
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Page 35: Installation Of The 2363 Interface Software
The uninstall screen appears, and the program removal will be complete. Connecting to a Computer Using the supplied cable, connect the end with the female connector to the Model 2363 and the other end to a free COM port on your computer. The pinouts of the cables are as... -
Page 36: Technical Theory Of Operation
Model 2363 Technical Manual Section 8 Section Technical Theory of Operation Gamma Transistor pairs, U9 and U10, form the charge sensitive amplifier. U13, comparator with 0.23 Vdc threshold, produces negative-going 5-volt pulses for every valid gamma pulse. One-shot, U15A provides single pulses for... -
Page 37: Troubleshooting
Model 2363 Technical Manual Section 9 Section Troubleshooting ccasionally, you may encounter problems with your LMI instrument or detector that may be repaired or resolved in the field, saving turnaround time and expense in returning the instrument to us for repair. Toward that end, LMI electronic technicians offer the following tips for troubleshooting the most common problems. - Page 38 Model 2363 Technical Manual Section 9 SYMPTOM POSSIBLE SOLUTION No power (or meter Check battery contacts. Clean them does not reach with rough sandpaper or use an engraver to clean the tips. TEST BAT OK mark) (continued) Check for loose or broken wires, especially between the main board and the calibration board.
- Page 39 Model 2363 Technical Manual Section 9 SYMPTOM POSSIBLE SOLUTION Meter goes full scale Open the instrument can, and check or “pegs out” for loose wires. (continued) Ensure that the instrument’s can is properly attached. When attached properly, the speaker will be located on the left side of the instrument.
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Page 40: Recycling
To this end, Ludlum Measurements, Inc. strives to supply the consumer of its goods with information regarding reuse and recycling of the many different types of materials used in its products. With many different agencies –... -
Page 41: Parts List
Technical Manual Section 11 Section Parts List Reference Description Part Number Model 2363 UNIT Completely Assembled Gamma-Neutron Model 2363 Gamma-Neutron Survey Meter Survey Meter 48-3501 BOARD Completely Assembled Processor Board, Processor Board 5390-295 Drawing 390 × 295 DETECTOR LND 71210, GM DET... - Page 42 Model 2363 Technical Manual Section 11 Reference Description Part Number 10µF, 25V 04-5728 C53-C54 220pF, 100V 04-5674 10µF, 25V 04-5728 C56-C59 0.01µF, 50V 04-5741 TRANSISTORS Q1-Q5 2N7002L 05-5840 Q6-Q8 MMBT3904LT1 05-5841 INTEGRATED 24LC515ISM 06-6570 CIRCUITS DS1621S 06-6565 MAX220CSE 06-6329 MAX810LEUR...
- Page 43 Model 2363 Technical Manual Section 11 Reference Description Part Number 7.5K, 1/8W, 1% 12-7847 R23-R25 1M, 1/4W, 1% 12-7844 100K, 1/4W, 1% 12-7834 2.21K, 1/4W, 1% 12-7835 301 Ohm, 1/4W, 1% 12-7863 2.37K, 1/4W, 1% 12-7861 R30-R34 100K, 1/4W, 1%...
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Page 44: Led Board, Drawing 390 × 299
Model 2363 Technical Manual Section 11 Reference Description Part Number LED Board, BOARD Completely Assembled Drawing 390 × 299 LED Board 5390-299 DIODES DS1-DS3 E176 LED-0.2X0.1 07-6494 RESISTORS R1-R3 470 Ohm, 1/4W, 5% 10-7008 CONNECTOR 640456-4, MTA100x4 13-8088 LCD Display Board, Drawing 390 ×... - Page 45 ON CAN, TINI #42 21-9333 TYPE SELECT READ INT. DOSE MISCELLANEOUS 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 Ludlum Measurements, Inc. Page 11-5...
- Page 46 Model 2363 Technical Manual Section 12 Section Drawings PROCESSOR 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 ×...
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