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Ludlum Measurements 44-2, Manual

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LUDLUM MODEL 44-2 

GAMMA SCINTILLATOR 

 

February 2018 

Serial Number PR361009 and Succeeding 

Serial Numbers 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for 44-2

Page 1: ...LUDLUM MODEL 44 2 GAMMA SCINTILLATOR February 2018 Serial Number PR361009 and Succeeding Serial Numbers ...

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Page 3: ...LUM MODEL 44 2 GAMMA SCINTILLATOR February 2018 Serial Number PR361009 and Succeeding Serial Numbers LUDLUM MEASUREMENTS INC 501 OAK STREET P O BOX 810 SWEETWATER TEXAS 79556 325 235 5494 FAX 325 235 4672 ...

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Page 5: ...anty of merchantability or fitness which extend beyond the description of the face there of If the product does not perform as warranted herein purchaser s sole remedy shall be repair or replacement at the option of Ludlum Measurements In no event will Ludlum Measurements be liable for damages lost revenue lost wages or any other incidental or consequential damages arising from the purchase use or...

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Page 7: ...asurements Inc February 2018 Table of Contents Introduction 1 Unpacking and Repacking 2 Specifications 3 Operating Procedures 4 Safety Considerations 5 Parts List Drawings and Diagrams 6 Energy Response Curve 10 ...

Page 8: ... 0 09 in of aluminum The detector is energy dependent over responding by a factor of 10 or greater in the 100keV range and under responding by a factor of 0 5 above 1 MeV when normalized to 137 Cs The Model 44 2 will operate with any Ludlum instruments or equivalent instruments that provide 500 1200 volts The recommended instrument input sensitivity is approximately 10 mV or higher Some common app...

Page 9: ...n If multiple detectors are included refer to the calibration certificates for serial number SN matches 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 ...

Page 10: ...s equipped with dead time correction Energy Response energy dependent Background 1800 cpm Operating Voltage 500 1200 volts Dynode String Resistance 100 megohm Connector series C others available Scintillator 2 5 x 2 5 cm 1 x 1 in Dia x thickness Tube 2 9 cm 1 1 in diameter magnetically shielded photomultiplier Efficiency 4 π 125 I is 7 57 Co is 10 137 Cs is 3 60 Co is 3 Construction aluminum housi...

Page 11: ...t the proper setting for the detector 2 Connect the detector to the instrument and check for a proper background reading typically 1 4 2 6 kcpm or 8 15 µR hr 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...

Page 12: ... 5 Pollution Degree 3 as defined by IEC 664 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 pr...

Page 13: ...2002 084 01 1 EA END CAP 7002 505 1 EA 2 5 x 2 5 cm 1 x 1 in NaI CRYSTAL 40 5154 1 EA 1 125 in TUBE SOCKET ASSY 01 5742 1 EA TUBE SHIELD 40 4006 1 EA CONNECTOR UG 706 U 4478 011 1 EA EJ560 1 10 080 OPT PAD 01 5786 FOAM 14 5873 1 EA O RING 16 8317 4 EA SCREWS 17 8811 1 EA LUG 18 8766 8 EA SPONGE 7002 029 05 1 EA SPONGE 4 P BS 7002 065 04 11 4 cm 4 5 in TEFLON WIRE 21 8993 11 4 cm 4 5 in 24 WIRE 21 ...

Page 14: ...Model 44 2 Gamma Scintillator Ludlum Measurements Inc Page 7 February 2018 ...

Page 15: ...lator Ludlum Measurements Inc Page 8 February 2018 Reference Description Part Number 3 8 cm 1 5 in Tube Socket Board 1 EA CIRCUIT BOARD 5002 370 1 EA CAP 0 01 µF 2kv 04 5525 11 EA RES 10 M W 1 12 7996 1 EA RES 1 M W 1 12 7844 ...

Page 16: ...Model 44 2 Gamma Scintillator Ludlum Measurements Inc Page 9 February 2018 3 8 cm 1 5 in Tube Socket Board Schematic ...

Page 17: ...Ludlum Measurements Inc Page 10 February 2018 ...

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