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Model 44-150-3 Gamma GM Detector

Ludlum Measurements, Inc.

May 2021

Table of Contents

Introduction

1

Unpacking and Repacking

2

Specifications

3

Operating Procedures

4

Safety Considerations

5

Parts List

6

Energy Response Curve

7

Drawing

8

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Summary of Contents for 44-150-3

Page 1: ...LUDLUM MODEL 44 150 3 GAMMA GM DETECTOR May 2021 ...

Page 2: ...LUDLUM MODEL 44 150 3 GAMMA GM DETECTOR May 2021 LUDLUM MEASUREMENTS INC 501 OAK STREET P O BOX 810 SWEETWATER TEXAS 79556 325 235 5494 FAX 325 235 4672 ...

Page 3: ...Model 44 150 3 Gamma GM Detector Ludlum Measurements Inc May 2021 Model 44 150 3 ...

Page 4: ...mma GM Detector Ludlum Measurements Inc May 2021 Table of Contents Introduction 1 Unpacking and Repacking 2 Specifications 3 Operating Procedures 4 Safety Considerations 5 Parts List 6 Energy Response Curve 7 Drawing 8 ...

Page 5: ...ler GM gamma survey detector that can be used with any portable ratemeter scaler instrument or area monitor that provides 900 Vdc with an input sensitivity of 30 10 mV Note The detector does not contain any consumable materials Note If the detector is used in a manner not intended by the manufacturer the detector may not function properly ...

Page 6: ...SN matches The Model 44 150 3 serial number is located on the side of the detector To return an instrument or detector for repair or calibration provide sufficient packing material to prevent damage during shipment and affix appropriate warning labels to promote careful handling Every returned instrument must be accompanied by an Instrument Return Form which can be downloaded from the Ludlum websi...

Page 7: ...00 cpm INPUT SENSITIVITY 30 mV 10 mV DEAD TIME typically 50 microseconds LINEARITY WITH DEAD TIME CORRECTION 0 01 mR hr to 80 mR hr LINEARITY WITHOUT DEAD TIME CORRECTION 0 01 mR hr to 8 mR hr TUBE 30 mg cm2 stainless steel Halogen quench GM TEMPERATURE RANGE 15 to 50 C 5 to 122 F SIZE 4 8 x 36 2 cm 1 9 x 14 3 in Dia x L CONSTRUCTION aluminum housing with beige powder coat finish WEIGHT 0 9 kg 2 l...

Page 8: ... at the proper setting for the detector 900 volts 2 Connect the detector to the instrument and check for a proper background reading 300 cpm 3 Expose the detector to a check source and verify that the instrument indicates within 20 of the check source reading from the last calibration Alternatively expose the detector to a source of known value and verify that the detector detects greater than or ...

Page 9: ...condensing 5 Pollution Degree 3 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 detector 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 wh...

Page 10: ...TGM 01 5015 3 EA SOCKET AMPH 78 S3S 01 5024 3 EA RES 3 3 MEG W 5 CR 25 10 7044 1 EA 0 RING 2 029 16 8317 1 EA LUG 14 N L 1HL 1497 18 8766 1 EA Model 44 150 3 BODY ASSY 2002 1130 25 IN WIRE TEFLON WHT 22 HV 21 8993 24 IN WIRE 22 BLACK UL1430 21 9413 11 7 IN SHRINK 3 16 INCH BLACK 22 9504 1 EA CONNECTOR SERIES C 4478 011 8 EA Model 44 3 44 2 43 5 SPNG 7002 029 05 2 EA Model 44 150 3 TIN SLEEVE 7002 ...

Page 11: ...l 44 150 3 Gamma GM Detector Ludlum Measurements Inc Page 7 May 2021 0 0 50 0 100 0 150 0 10 100 1000 10000 Model 44 150 3 Ambient Dose Equivalent Energy Response Relative to Cs 137 Ambient Dose Equivalent ...

Page 12: ...Model 44 150 3 Gamma GM Detector Ludlum Measurements Inc Page 8 May 2021 ...

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