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LUDLUM 500-2 Manual

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LUDLUM MODEL 500-2
PULSER
September 2015
Serial Number 206262 and Succeeding
Serial Numbers

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Summary of Contents for LUDLUM 500-2

  • Page 1 LUDLUM MODEL 500-2 PULSER September 2015 Serial Number 206262 and Succeeding Serial Numbers...
  • Page 2 LUDLUM MODEL 500-2 PULSER September 2015 Serial Number 206262 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 4: Table Of Contents

    Warning Markings and Symbols Replacement of Main Fuse Maintenance and Recalibration Maintenance Recalibration Recycling Parts List Model 500-2 Pulser Pulser Board, Drawing 208 X 61 Readout Board, Drawing 208 X 176 HV Readout Board, Drawing 208 X 145 Ludlum Measurements, Inc. September 2015...
  • Page 5 Readout Controller, Drawing 208 x 173 Amplitude Readout Board, Drawing 208 x 17 Wiring Diagram, Drawing 208 X 181 Drawings and Diagrams Ludlum Measurements, Inc. September 2015...

  • Page 6: Introduction

    Section 1 Section Introduction he Ludlum Model 500-2 Pulse Generator (Pulser) provides the functions necessary for use in calibrating Ludlum instruments, as well as many other scaler/ratemeter instruments. The adjustable output pulse rate is displayed on a three-digit LED readout.

  • Page 7: Specifications And Controls

    Model 500-2 Pulser Technical Manual Section 2 Section Specifications and Controls Power: 95-135 Vac, 50/60 Hz at less than 20 volt-amperes Pulse Output: standard connector “C” type (“C” cable is provided) measured by a high-impedance voltmeter up to High Voltage Readout: 1999 volts on the PULSE OUT connector.

  • Page 8: Accessories

    Model 500-2 Pulser Technical Manual Section 2 Series “C” to “BNC” and “C” to “MHV” adapters are Accessories: provided. Note If the pulse amplitude from the Pulser exceeds ten times the input sensitivity of the test instrument, double pulsing may occur in the instrument under test.

  • Page 9: Getting Started

    Section 3 Section Getting Started he Ludlum Model 500-2 Pulser (Pulser) is commonly used to calibrate a variety of radiation detection (survey) equipment to a certain count rate (CPS-counts per second, CPM-counts per minute, KCPM-kilo counts per minute, etc.). This is accomplished by measuring high voltage, determining pulse height threshold, and feeding simulated pulses to an instrument.

  • Page 10: Measuring Instrument High Voltage

    Model 500-2 Pulser Technical Manual Section 3 If you are calibrating an instrument with an analog display, you will first want to ensure that the meter movement has proper mechanical zero. Adjustments are typically on the front of the meter bezel and must be made with the instrument power OFF and the instrument in its normal handheld (or “resting”) position.

  • Page 11: Electronic Count Rate Calibration

    For more detailed information on electronic calibration of Ludlum Measurements instruments utilizing the Ludlum Model 500-2 Pulser, contact Ludlum Measurements, Inc. Training Department, and/or consult Ludlum Measurements, Inc.

  • Page 12: Determining Dose Rate Conversion

    Model 500-2 Pulser Technical Manual Section 3 Determining Dose Rate Conversion The pulser is also frequently used (in accordance with ANSI N323-1997, section 4.2) to determine a conversion constant between count rate and dose rate after an instrument has been calibrated to dose rate (on a range). This conversion constant can then later be used for “Bottom Range”...

  • Page 13: Safety Considerations

    Pollution Degree 2 (as defined by IEC 664) Cleaning Instructions and Precautions The Model 500-2 Pulser 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 14: Warning Markings And Symbols

    Ludlum Measurements, Inc. The Model 500-2 Pulser is marked with the following symbols: ALTERNATING CURRENT (AC) (IEC 417, No,. 5032) - designates an input receptacle that accommodates a power cord intended for connection to AC voltages.

  • Page 15: Replacement Of Main Fuse

    Model 500-2 Pulser Technical Manual Section 4 Caution! Verify instrument voltage input rating before connecting to a power converter. If the wrong power converter is used, the instrument and/or power converter could be damaged. The “crossed-out wheelie bin” symbol notifies the consumer that the product is not to be mixed with unsorted municipal waste when discarding.

  • Page 16: Maintenance And Recalibration

    Ludlum Measurements, Inc. recommends recalibration at intervals no greater than one year. 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.
  • Page 17 Every returned instrument must be accompanied by an Instrument Return Form, which can be downloaded from the Ludlum website at www.ludlums.com. Find the form by clicking the “Support” tab and selecting “Repair and Calibration” from the drop-down menu. Then choose the appropriate Repair and Calibration division where you will find a link to the form.

  • Page 18: 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 19: Parts List

    Model 500-2 Pulser Technical Manual Section 7 Section Parts List Reference Description Part Number Model 500-2 Pulser UNIT Completely Assembled Model 500-2 Pulser 48-1340 PULSER BOARD W/ BOARD Completely Assembled TEMP. STABLE OSC. Circuit Board 5208-084 (Main Board), Drawing 208 X 61...
  • Page 20 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number MPS6534 05-5763 2N7000 05-5820 VPO300M SILICONIX 05-5834 2N3904 05-5755 MPS6534 05-5763 VOLTAGE REGULATOR LM320LZ-05 05-5771 INTEGRATED CIRCUITS AD654JN 06-6317 U2-U6 CD4017BE 06-6001 LM555CN (M500 ONLY) 06-6017 CD4098BE 06-6066 CD4001BE...
  • Page 21 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number 10K, 1/4W, 5% 10-7016 100K, 1/4W, 5% 10-7023 R25-R26* 56K, 1/4W, 5% 10-7021 R28-R29 100K, 1/4W, 5% 10-7023 10K, 1/4W, 5% 10-7016 220 Ohm, 1/4W, 5% 10-7041 100 Ohm, 1/4W, 5%...
  • Page 22 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number HV READOUT BOARD, Drawing BOARD Completely Assembled 208 X 145 HV Readout Board 5208-018 CAPACITORS 0.01µF, 100V 04-5523 0.047µF, 100V 04-5565 0.22µF, 100V 04-5566 0.1µF, 100V 04-5521 100pF, 100V...
  • Page 23 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number SN74AHC14D SO-14 06-6474 MSP430F1101DW SOW-20 06-6529 INTEGRATED SN74AHCT541D SOW-20 06-6527 CIRCUITS TPS3825-33SOT-23-5 06-6558 RESISTORS R1-R2 10K, 1/8W, 1% 12-7839 R3-R6 2.21K, 1/8W, 1% 12-7835 33.2K, 1/8W, 1% 12-7842 10K, 1/8W, 1%...
  • Page 24 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number RESISTORS 10K, 1/4W, 5% 10-7016 1 Meg, 1/4W, 5% 10-7028 100K, 1/4W, 5% 10-7023 470K, 1/4W, 5% 10-7026 470 Ohm, 1/4W, 5% 10-7008 Wiring Diagram, Drawing 208 X 181...
  • Page 25 Model 500-2 Pulser Technical Manual Section 7 Reference Description Part Number RESISTORS 909 Ohm, 1/8W, 1% 12-7553 90.9 Ohm, ¼ (1/8)W, 1% 12-7552 10 Ohm, 1/8W, 1% 12-7554 1 Ohm, 3W, 1% 12-7555 1K, 2W, 5% 12-7605 100 Ohm, 1/4W, 5%...

  • Page 26: Readout Board, Drawing 208 X 176

    Model 500-2 Pulser Technical Manual Section 8 Section Drawings PULSER BOARD W/ TEMP STABLE OSC., Drawing 208 X 61 MODEL 500 MAIN BOARD, COMPONENT OUTLINES, Drawings 208 X 63 and 208 X 63A MODEL 500 READOUT BOARD, Drawing 208 X 176...

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