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Ludlum Measurements 52-1 Manual

52-1 family portable scintillation portal monitors
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LUDLUM MODEL 52-1 FAMILY
PORTABLE SCINTILLATION PORTAL MONITORS
July 2018
Serial Number 210041 and Succeeding
Serial Numbers

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Summary of Contents for Ludlum Measurements 52-1

  • Page 1 LUDLUM MODEL 52-1 FAMILY PORTABLE SCINTILLATION PORTAL MONITORS July 2018 Serial Number 210041 and Succeeding Serial Numbers...
  • Page 2 LUDLUM MODEL 52-1 FAMILY PORTABLE SCINTILLATION PORTAL MONITORS July 2018 Serial Number 210041 and Succeeding Serial Numbers...
  • Page 4 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 7: Table Of Contents

    Model 52-1 Family Technical Manual Table of Contents Introduction Specifications User Operation Assembly Instructions Operational Check Personnel Monitoring Description of Controls and Functions Front Panel AC Panel Parameters and Functions RS-232 Port Water Resistant Sleeve Theory of Background Management Safety Considerations...
  • Page 8 Model 52-1 Family Technical Manual Recycling Parts List Models 52-1, 52-1-1, 52-5, 52-5-1, 52-6 and 52-6-1 Portable Scintillation Porta Monitors Main Board, Drawing 215 x 342-342E Detector Interface Board, Drawing 215 x 347 Power Supply, Drawing 215 x 1072 1 1/8 inch Voltage Divider, Drawing 435 x 435...

  • Page 9: Introduction

    The Model 52-5 and 52-6 have the same width dimensions as the Model 52-1. The Model 52-5 is about an inch taller due to the addition of a detector in the base. It has 5 detectors. The Model 52-6 uses 6 detectors, with another additional detector located at the top.
  • Page 10 Model 52-1 Family Technical Manual Section 1 (FEMA-REP-21). They are designed to be disassembled for ease of transportation and storage, and can be assembled in five minutes or less without tools. All parameters are stored in non-volatile memory, which requires no battery backup. These parameters allow easy operation with minimal setup by minimally trained personnel.

  • Page 11: Specifications

    Model 52-1 Family Technical Manual Section 2 Section Specifications 2 line-by-20-character LCD, backlit when operated from Display (Setup): AC power Display (User): five large status LEDs on one side of portal, and detector LEDs to show alarm location 700-1200 V...
  • Page 12 Outside Dimensions (when set up): For Model 52-1: 211 x 81.3 x 45 cm (83 x 32 x 17.5 in.) (H x W x L) For Model 52-1-1: 211 x 102 x 45 cm (83 x 40 x 17.5 in.) (H x W x L) For Model 52-5: 213 x 81.3 x 48 cm (84 x 32 x 19.3 in.) (H x W x L)

  • Page 13: User Operation

    Model 52-1 Family Technical Manual Section 3 Section User Operation his section gives instructions how to set up and use the instrument to monitor a person for radiation. Assembly Instructions This section gives instructions on how to assemble these instruments and get them ready for use.
  • Page 14 Model 52-1 Family Technical Manual Section 3 To unlatch, lift up the tab and unhook the top cross bar. Set the BASE on the ground with the rectangular tubes pointing up. If optional stabilizer legs are provided, attach to the BASE, front and rear, with screws provided.

  • Page 15: Operational Check

    (above background level). Ludlum Measurements suggests that this operational check be performed after setup and before use. As long as the system passes the operational check, no calibration or other checks are necessary.
  • Page 16 Model 52-1 Family Technical Manual Section 3 background setpoints that have been programmed into the unit. If the setpoints have been exceeded, an INSTRUMENT FAILURE alarm is given, and the unit attempts to update background. The instrument will continue to update the background until the alarm condition has been corrected;...
  • Page 17 Model 52-1 Family Technical Manual Section 3 possibility the alarm was caused by a momentary, coincidental high- background event. Once an alarm has been validated after one (or two) confirming measurements, the subject can be moved away (>10 m) from the monitor, and a secondary scan with a hand-held meter can be performed to identify the location(s) of the contamination or point source.

  • Page 18: Description Of Controls And Functions

    Model 52-1 Family Technical Manual Section 4 Section Description of Controls and Functions Front Panel Readout: Liquid Crystal Display (LCD), 2-line, 20-character alphanumeric display. Background and alarm data is displayed.  increases or changes a parameter Increment (Up Arrow Button: when in setup mode.
  • Page 19 Model 52-1 Family Technical Manual Section 4 RT Active RB Active *HD Active (* for Models 52-5 and 52-6 only) *FT Active (* for Models 52-5 and 52-6 only) Individual Alarms Sum Alarms # of Samples Bkgnd Update LT Attenuation 0.0%...

  • Page 20: Ac Panel

    Model 52-1 Family Technical Manual Section 4 indicates the batteries are low and must be Low Battery red LED: replaced immediately. AC Panel fuses to limit current from the AC outlet. The Line Fuse: fuses are Littlefuse F-1A or equivalent.
  • Page 21 This number, in nCi, indicates the size of the source used RDA Size: during the automatic RDA calculation. (The Model 52-1 does not utilize the automatic RDA feature, and the RDA size is set to 500.) This parameter sets the number of Low Background (BKGND) Alarm: counts per 0.2-second interval that the background should not fall below...

  • Page 22: Rs-232 Port

    (see above). The RS-232 port operates at 9600 baud, 8 data bits, 1 stop bit, no parity (9600,8,N,1). An example print-out from the Model 52-1 RS-232 port after power-on is shown here: LUDLUM MODEL 52-1 PORTAL...

  • Page 23: Water Resistant Sleeve

    Model 52-1 Family Technical Manual Section 4 An example print-out from the Model 52-5 and the 52-5-1 RS-232 port after a complete count is shown in the following paragraphs. Note that the BKG column is expressed in counts per 0.2-second intervals, while the COUNT column is expressed in terms of sigma above background.
  • Page 24 Model 52-1 Family Technical Manual Section 4 process is stopped immediately and restarted after the person leaves the portal. One very important consideration for the background measurement process is accounting for the shielding effect of a human body. A human body inside or next to the portal actually lowers the background by several percent.
  • Page 25 Model 52-1 Family Technical Manual Section 4 order to make a determination on questionable counts. For example, an original count time of two seconds may get extended another four seconds if the count during the original two seconds is not clearly less than the alarm point or clearly more that the alarm point.

  • Page 26: Safety Considerations

    Pollution Degree 3 (as defined by IEC 664) Cleaning Instructions and Precautions The Model 52-1, 52-5, and 52-6 series of instruments 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 27: Electrical Safety Precautions

    Model 52-1 Family Technical Manual Section 5 Electrical Safety Precautions Warning! Please follow the instructions below. If you do not, a potentially hazardous situation could develop, which could result in death or serious personal injury.  Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock.

  • Page 28: Warning Markings And Symbols

    Ludlum Measurements, Inc. The Model 52-1, 52-1-1, 52-5, 52-5-1, 52-6, and 52- 6-1 Portable Scintillation Portal Monitors are marked with the following symbols: ALTERNATING CURRENT (AC) (IEC 417, No.

  • Page 29: Maintenance And Recalibration

    Maintenance Instrument maintenance consists of keeping the instrument clean and periodically checking the calibration. The Model 52-1, 52-5, and 52-6 Series of instruments may be cleaned externally with a damp cloth, using only water as the wetting agent. Do not immerse the instrument in any liquid.

  • Page 30: Checkout Procedure

    Model 52-1 Family Technical Manual Section 7 Section Checkout Procedure General These models are set for -4 mV sensitivity (pulse height) for their plastic scintillation detectors. Equipment Required 1. Ludlum Model 500 Pulser or equal. 2. High-impedance voltmeter for high-voltage measurements (1000 megohm) 3.
  • Page 31 Model 52-1 Family Technical Manual Section 7  Connect the cable from the Model 500 Pulser to one of the detector interface boards. Apply power to the board by supplying +12 Vdc and ground on the two-pin connector on the detector interface board.

  • Page 32: 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, public and private, involved in this pursuit it becomes evident that a myriad of methods can be used in the process of recycling.

  • Page 33: Parts List

    Model 52-1 Family Technical Manual Section 9 Section Parts List Reference Description Part Number Models 52-1, 52-1-1, UNIT Completely Assembled 52-5, 52-5-1, 52-6, Model 52-1 Portal Monitor 48-3172 and 52-6-1 Portable Scintillation Portal UNIT Completely Assembled Monitors Model 52-1-1 Portal Monitor...
  • Page 34 Model 52-1 Family Technical Manual Section 9 Reference Description Part Number 0.1µF, 50V 04-5663 0.01µF, 50V 04-5664 0.01µF, 50V 04-5664 10pF, 100V 04-5673 C26-C28 0.01µF, 50V 04-5664 C29-C34 1µF, 35V 04-5656 TRANSISTORS Q1-Q5 2N7002L 05-5840 MMBT4403LT1 05-5842 2N7002L 05-5840 2N7002L...
  • Page 35 Model 52-1 Family Technical Manual Section 9 Reference Description Part Number RESISTORS 5k TRIMMER 09-6918 4.75k 12-7858 R3-R4 1.5 OHM 12-7602 8.25k 12-7838 4.75k 12-7858 12-7839 12-7832 R12-R13 12-7839 100k 12-7834 100k 12-7834 R24-R29 2.21k 12-7835 R32-R37 12-7832 RESISTOR NETWORK...
  • Page 36 Model 52-1 Family Technical Manual Section 9 Reference Description Part Number BOARD Completely Assembled Detector Interface Detector Interface Board 5215-347 Board, Drawing 215 x 347 10µF, 25V 04-5655 4.7µF, 25V 04-5653 CAPACITORS 0.001µF, 100V 04-5659 10µF, 25V 04-5655 47µF, 10V 04-5666 0.001µF, 10V...
  • Page 37 Model 52-1 Family Technical Manual Section 9 Reference Description Part Number 392k 12-7841 1 M TRMR 09-6911 R19-R20 12-7844 12-7686 12-7844 INTEGRATED CIRCUITS ICL7667CBA 06-6510 MAX985EUK-T 06-6459 CA3096M 06-6288 MAX641ACSA-5 06-6388 VOLTAGE REGULATOR LT1460KCS3-2.5TR 05-5867 LM78L05ACM 05-5864 INDUCTORS L1-L2 470 µH...
  • Page 38 Model 52-1 Family Technical Manual Section 9 Reference Description Part Number TRANSISTORS FDS6612A 05-5742 RESISTORS 499k, 250mW 12-7037 365k, 250mW 12-7049 499k, 250mW 12-7037 22k, 100mW 12-7179 R5-R6 1.5Ohm, 3W 12-7602 499k, 250mW 12-7037 86.6k, 250mW 12-8275 0.04Ohm, 1W 12-8276...
  • Page 39 IR TRANSMITTER 2310738 MISCELLANEOUS B1-B6 BATTERY – “D” 21-9313 MEMBRANE SWITCH KEYPAD 7215-779 ALARM-TXC-V86-515-Q 5-15VDC XLOUD 21-8802 Miscellaneous Model 52-1 12 Vdc Car Power Cable 8515-819 Parts Model 52-1 +12V Wall Transformer Cable 8303-1029 Ludlum Measurements, Inc. Page 9-7 July 2018...

  • Page 40: Main Board, Drawing 215 X 342-342E

    Wiring Diagram-Electronics, Drawing 215 x 1044 (2 sheets) Assembly and Setup Model 52-1 & 52-5 Series Packing Instructions, Drawing 215 x 225C Model 52-6 Series Packing Instructions, Drawing 215 x 633B Model 52-1 & 52-5 Series Overall Assembly, Drawing 215 x 225A Model 52-6 Overall Assembly Drawing 215 x 633A Ludlum Measurements, Inc.
  • Page 41 Model 52-1 Family Technical Manual Section 10 Model 52-1 & 52-5 Series Dimensions, Drawing 215 x 225 Model 52-6 Series Dimensions, Drawing 215 x 633 Car Base Assembly, Drawings 215 x 332 & 332A Car Base Setup, Drawing 215 x 374 & 374B Ludlum Measurements, Inc.

This manual is also suitable for:

52-1-152-552-652-6-152-5-1

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