1. Manuals
  2. Brands
  3. Ludlum Measurements Manuals
  4. Measuring Instruments
  5. 16
  6. Technical manual

Ludlum Measurements 16 Technical Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
LUDLUM MODEL 16
ANALYZER
July 2011
Serial Number 95362 and Succeeding
Serial Numbers

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 16 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Ludlum Measurements 16

Summary of Contents for Ludlum Measurements 16

  • Page 1 LUDLUM MODEL 16 ANALYZER July 2011 Serial Number 95362 and Succeeding Serial Numbers...
  • Page 2 LUDLUM MODEL 16 ANALYZER July 2011 Serial Number 95362 and Succeeding Serial Numbers...
  • Page 3 RETURN OF GOODS TO MANUFACTURER If equipment needs to be returned to Ludlum Measurements, Inc. for repair or calibration, please send to the address below. All shipments should include documentation containing return shipping address, customer name, telephone number, description of service requested, and all other necessary information.

  • Page 5: Table Of Contents

    Cleaning and Maintenance Precautions Calibration and Maintenance Establishing an Operating Point Calibration GM Detectors Proportional Detectors Scintillation Detectors Window Calibration HV Calibration Ratemeter Calibration Detector Overload Calibration With Scintillation Detectors With GM Detectors Maintenance Recalibration July 2011 Ludlum Measurements, Inc.
  • Page 6 Model 16 Analyzer Technical Manual Batteries Troubleshooting Troubleshooting Electronics which utilize a GM, Scintillator or Proportional Detector Troubleshooting GM Detectors Troubleshooting Scintillators Troubleshooting Proportional Detectors Recycling Parts List Model 16 Analyzer Main Board, Drawing 363 × 558 Calibration Board, Drawing 363 × 511 Wiring Diagram, Drawing 363 ×...

  • Page 7: Introduction

    Model 16 Analyzer Technical Manual Section 1 Section Introduction he Ludlum Model 16 Analyzer supplies the complete electronic requirements for scintillation, proportional, or GM monitoring with the added feature of a window discriminator circuit. A two-position switch, marked allows the instrument to WIN IN operate as a gross count ratemeter or as a single-channel analyzer.

  • Page 8: Getting Started

    The Model 16 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

    A mild electric shock may occur if you make contact with the center pin of the input connector. Switch the Model 16 range selector switch to the position before connecting or disconnecting the cable or detector.

  • Page 10: Operational Check

    Model 16 Analyzer Technical Manual Section 2 The instrument speaker should emit ˝clicks˝ relative to the rate of counts detected. The switch will silence the audible clicks if in the AUD ON position. It is recommended that the switch be kept in the AUD ON position when not needed in order to preserve battery life.
  • Page 11 Model 16 Analyzer Technical Manual Section 2 A reference reading with a check source should be obtained at the time of initial calibration or as soon as possible for use in confirming proper instrument operation. In each case, ensure a proper reading on each scale. If the instrument fails to read within 20% of a proper reading, it should be sent to a calibration facility for recalibration.

  • Page 12: Specifications

    Model 16 Analyzer Technical Manual Section 3 Section Specifications : GM, proportional, and scintillation Compatible Detectors : two ˝ ˝ cell batteries housed in a sealed externally accessible Power compartment : typically 600 hours with alkaline batteries (battery Battery Life condition may be checked on the meter) : ×1, ×10, ×100, and ×1000 selected by a front panel range...
  • Page 13 : pushbutton to zero the meter Reset : -20 to 50 °C (-4 to 122 °F) Operating Temperature : 16.5 x 8.9 x 21.6 cm (6.5 x 3.5 x 8.5 in.) (H x W x L) Size : 1.6 kg (3.5 lb), including batteries Weight...

  • Page 14: Identification Of Controls And Functions

    Model 16 Analyzer Technical Manual Section 4 Section Identification of Controls and Functions : a six-position switch marked , ×1000, Range Selector Switch ×100, ×10, ×1. Turning the range selector switch from provides the operator with a battery check of the instrument. A check scale on the meter provides a visual means of checking the battery-charge status.
  • Page 15 Model 16 Analyzer Technical Manual Section 4 : This recessed potentiometer located under the HV Adjustment calibration cover provides a means of varying the high voltage from 400 to 2500 V. : recessed potentiometers located under Range Calibration Adjustment the calibration cover. These controls allow for individual calibration of each range multiplier.

  • Page 16: Safety Considerations

    Ludlum Measurements, Inc. The Model 16 Analyzer is marked with the following symbols: CAUTION, RISK OF ELECTRIC SHOCK (per ISO 3864, No. B.3.6) –...

  • Page 17: Cleaning And Maintenance Precautions

    European Union. Cleaning and Maintenance Precautions The Model 16 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 or performing maintenance on the instrument: 1.

  • Page 18: Calibration And Maintenance

    Model 16 Analyzer Technical Manual Section 6 Section Calibration and Maintenance Establishing an Operating Point The operating point for the instrument and probes is established by setting the probe voltage and instrument sensitivity ( ). The proper selection of this point is the key to instrument performance.

  • Page 19: Gm Detectors

    Model 16 Analyzer Technical Manual Section 6 GM D ETECTORS Note: The GM detector pulse is NOT proportional to Gamma Energy. operation has no function. WINDOW 1. Check GM detector specifications for proper operating high voltage. Select this voltage with the calibration control.

  • Page 20: Window Calibration

    INDOW ALIBRATION Window calibration will be valid only with the specific detector to be used with the Model 16. A check source will be required. A Model 500 Pulser will be required if the calibration is shifted to another energy.

  • Page 21: Hv Calibration

    1000 megohm input resistance. High-voltage readout may be calibrated with an internal control. Remove instrument can. Connect the Model 16 to the Model 500 Pulser. Observe the high-voltage reading on the Model 500. Press the pushbutton. Adjust R16 on the internal HV test board for the same reading.

  • Page 22: Ratemeter Calibration

    Model 16 Analyzer Technical Manual Section 6 ATEMETER ALIBRATION The ratemeter may be calibrated by adjusting calibration controls labeled 1, 10, 100, and 1K. Starting with the 1000 range, apply 400,000 CPM from the Model 500 Pulser. Adjust for proper reading. Drop pulse rate to 100,000 CPM and confirm reading at 100,000 ∀10,000 CPM.

  • Page 23: Maintenance

    Maintenance Instrument maintenance consists of keeping the instrument clean and periodically checking the batteries and the calibration. The Model 16 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 24: Recalibration

    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 25: Troubleshooting

    Model 16 Analyzer Technical Manual Section 7 Section Troubleshooting ccasionally, you may encounter problems with your LMI instrument or detector that may be repaired or resolved in the field, saving turn-around time and expense in returning the instrument to us for repair. Toward that end, LMI electronics technicians offer the following tips for troubleshooting the most common problems.
  • Page 26 Model 16 Analyzer Technical Manual Section 7 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 27: Troubleshooting Gm Detectors

    Model 16 Analyzer Technical Manual Section 7 SYMPTOM POSSIBLE SOLUTION Meter goes full-scale Check for loose wires, especially or “pegs out” between the main board and the (continued) calibration board. Ensure that the instrument’s ˝can˝ is properly attached. When attached properly, the speaker will be located on the left side of the instrument.

  • Page 28: Troubleshooting Scintillators

    Model 16 Analyzer Technical Manual Section 7 3. If the input sensitivity is too low, the user could see some double-pulsing. 4. Wires to the tube may be broken or the crimped connector could have a loose wire. Troubleshooting Scintillators 1.
  • Page 29 Model 16 Analyzer Technical Manual Section 7 2. Neutron He detectors typically require a 2 mV threshold and about 1700 Vdc. Neutron BF detectors typically operate at 1750 Vdc and 30 mV threshold. 3. Gas proportional detectors need P-10 gas, so check the window for tears or leaks and ensure an adequate supply of gas.

  • Page 30: 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 31: Parts List

    Model 16 Analyzer Technical Manual Section 9 Section Parts List Reference Description Part Number Model 16 Analyzer UNIT Completely Assembled Model 16 Analyzer 48-1612 Main Board, BOARD Completely Assembled Drawing 363 × 558 Main Circuit Board 5363-708 CAPACITORS C001-C002 0.0047μF, 3kV...
  • Page 32 Model 16 Analyzer Technical Manual Section 9 Reference Description Part Number C411 0.1μF, 50V 04-5663 C412 100pF, 100V 04-5661 C413 0.01μF, 50V 04-5664 C421 10μF, 20V 04-5655 TRANSISTORS Q021 MJD210 05-5843 Q111 MMBT3904T 05-5841 Q121 MMBT4403LT 05-5842 Q211 MMBT3904T 05-5841...
  • Page 33 Model 16 Analyzer Technical Manual Section 9 Reference Description Part Number R215 1 M, 1% 12-7844 R216 475k, 1% 12-7859 R217 10k, 1% 12-7834 R218 12-7686 R219 12-7844 R301 10-7028 R302 100k, 1% 12-7834 R303 10k, 1% 12-7839 R304 100k, 1%...

  • Page 34: Calibration Board, Drawing 363 × 511

    Model 16 Analyzer Technical Manual Section 9 Reference Description Part Number Calibration Board, BOARD Completely Assembled Drawing 363 × 511 Calibration Board 5363-656 0.0047μF, 100V 04-5570 CAPACITORS 0.047μF, 100V 04-5565 LED-HLMP4700 07-6356 LED-SPACER 456-500 07-6349 POTENTIOMETERS 250k, ×1000 09-6819 2 M, ×100 09-6834 1 M, ×10...
  • Page 35 Model 16 Analyzer Technical Manual Section 9 Reference Description Part Number UNIMORPH 21-9251 AUDIO B1-B2 “D” CELL BATTERY 21-9313 BATTERIES PORT BEZEL W/OL METER & MVMNT ASSY 4363-720 BATTERY BOX LID MISCELLANEOUS Model 16 9363-301 BATTERY CONTACT SET 40-1701 CASTING, Model 16...
  • Page 36 Model 16 Analyzer Technical Manual Section 10 Section Drawings MAIN CIRCUIT BOARD SCHEMATIC, Drawing 363 × 558 MAIN CIRCUIT BOARD LAYOUT, Drawing 363 × 559 CALIBRATION BOARD SCHEMATIC, Drawing 363 × 511 CALIBRATION BOARD LAYOUT, Drawing 363 × 512 WIRING DIAGRAM, Drawing 363 × 515...

This manual is also suitable for:

95362

Table of Contents