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Ludlum Measurements 44-157, Manual

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Model 44-157, 44-159, 44-159-1, 44-162  
Gamma Pipe Monitors 

Ludlum Measurements, Inc. 

Page 7 

September 2016 

Parts List, Drawings and Diagrams 

 

 

Reference  

Description 

Part Number 

 
UNIT   

Completely Assembled  

 

 

 

 

Model 44-157 2X2 SPHERICAL Gamma Pipe  

 

 

 

47-3332 

 
1 EA   

DETECTOR BODY TOP 

7002-703 

1 EA   

DETECTOR BODY BOTTOM  7002-774 

1 EA   

GROUND PLATE  

7002-775 

1 EA   

REFLECTIVE RING 

7002-776 

2 EA   

CONN PULL 2 

7002-781 

3 EA   

FOAM RING 

7090-015 

1 EA   

FOAM PAD 

7260-001-05 

1 EA    

2 x 2 in. NaI CRYSTAL 

01-5128 

1 EA   

PM TUBE-R9880U/110 

01-5936 

1 EA   

RECPT-UG568/U PANEL C FLANGE 

 

 

 

13-7752 

1 EA   

O-RING 2-235 BUNA 70 

16-8388 

4 EA   

SCREW 4-40 X 5/16 BH 

17-8511 

4 EA   

WIRE-TEFLON WHITE EE24  21-9362 

4 EA   

WIRE-#24 BLACK 

21-9558 

 
 

 
 

Model 44-157 Gamma Pipe Monitor 

Summary of Contents for 44-157

Page 1: ...LUDLUM MODEL 44 157 44 159 44 159 1 44 162 GAMMA PIPE MONITORS September 2016 ...

Page 2: ......

Page 3: ...LUDLUM MODEL 44 157 44 159 44 159 1 44 162 GAMMA PIPE MONITORS September 2016 ...

Page 4: ......

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...

Page 6: ...urements Inc September 2016 Table of Contents Introduction 1 Unpacking and Repacking 2 Specifications 3 Operating Procedures 6 Safety Considerations 6 Parts Lists Drawings and Diagrams 7 Energy Response Curves 19 ...

Page 7: ...rystal and the Model 44 162 a 3 x 3 inch NaI crystal both also coupled to a photomultiplier tube housed in aluminum The detector is energy dependent typically over responding in the 100 keV range and under responding above 1 MeV when normalized to 137 Cs The gamma pipe monitors will operate with any Ludlum instruments or equivalent instruments that provide 700 1200 volts The recommended instrument...

Page 8: ... listed on the packing list are in the carton 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 Ins...

Page 9: ...rs Sensitivity 44 157 900 cpm µR hr 137 Cs gamma 44 159 44 159 1 120 cpm µR hr 44 162 2300 cpm µR hr Energy Range 44 157 60 keV to 3 MeV 44 159 44 159 1 50 keV to 3 MeV 44 162 60 keV to 3 MeV Background 44 157 9750 cpm 44 159 44 159 1 750 cpm 44 162 2200 cpm Operating Voltage 44 157 500 1200 Vdc 44 159 44 159 1 700 1200 Vdc 44 162 500 1200 Vdc Dynode String Resistance 44 157 60 megohm 44 159 44 15...

Page 10: ...3 in 44 162 diameter 2 9 cm 1 3 in Construction aluminum housing with beige powder coat finish Temperature Range 20 to 50 C 4 to 122 F may be certified for 40 to 65 C 40 to 150 F Size 44 157 8 9 x 15 5 cm 3 5 x 6 1 in Dia x L 44 159 2 5 x 7 1 cm 1 x 2 8 in Dia x L 44 159 1 2 2 x 8 1 cm 0 875 x 3 2 in Dia x L 44 162 19 1 x 24 1 cm 7 5 x 9 5 in Dia x L Weight 44 157 1 4 kg 3 lb 44 159 0 1 kg 0 3 lb ...

Page 11: ... the instrument high voltage HV is at the proper setting for the detector 2 Connect the detector to the instrument and check for a proper background 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 ...

Page 12: ...non condensing 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 th...

Page 13: ...BODY TOP 7002 703 1 EA DETECTOR BODY BOTTOM 7002 774 1 EA GROUND PLATE 7002 775 1 EA REFLECTIVE RING 7002 776 2 EA CONN PULL 2 7002 781 3 EA FOAM RING 7090 015 1 EA FOAM PAD 7260 001 05 1 EA 2 x 2 in NaI CRYSTAL 01 5128 1 EA PM TUBE R9880U 110 01 5936 1 EA RECPT UG568 U PANEL C FLANGE 13 7752 1 EA O RING 2 235 BUNA 70 16 8388 4 EA SCREW 4 40 X 5 16 BH 17 8511 4 EA WIRE TEFLON WHITE EE24 21 9362 4 ...

Page 14: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 8 September 2016 ...

Page 15: ...7002 784 1 EA REFLECTIVE RING 7002 785 2 EA CONN PULL 2 7002 781 1 EA SPONGE 4 P BS 7002 065 04 1 EA 18 X 18 mm Csl TL CRYSTAL 01 5661 1 EA PM TUBE R9880U 110 01 5936 1 EA RECPT UG1094 U SCREW BNC 13 7753 1 EA O RING 2 017 16 8304 4 EA SCREW 4 40 X 3 16 BH 17 8509 1 EA SCREW 2 56 X 1 8 BH 17 8727 4 EA SCREW 4 40 X 3 16 FH 17 8811 1 EA LUG 2 922 092 18 9034 2 EA WIRE TEFLON WHITE 22 HV 21 8993 2 EA...

Page 16: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 10 September 2016 ...

Page 17: ...2 1072 1 EA CONN PULL BRACKET 7002 1073 1 EA SPRING END CUSHION 7002 998 1 EA SPONGE 4 P BS 7002 065 04 1 EA 18 X 18 mm Csl TL CRYSTAL 01 5661 1 EA PM TUBE R9880U 110 01 5936 1 EA RECPT UG657A SCREW BNC 13 8012 1 EA O RING 2 012 16 8302 1 EA O RING 2 106 BUNA 17 16 8364 1 EA SCREW 2 56 X 1 8 BH 17 8727 3 EA SCREW 2 56 X 1 8 FH 17 8743 1 EA LUG 2 922 092 18 9034 2 EA WIRE TEFLON WHITE 22 HV 21 8993...

Page 18: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 12 September 2016 ...

Page 19: ...e 13 September 2016 Reference Description Part Number 16 mm 9880V 110 Tube Socket Board used in Models 44 157 44 159 44 159 1 1 EA CIRCUIT BOARD 5435 421 1 EA CAP 0 01 µF 2kv 04 5703 10 EA RES 10 M W 1 12 7105 1 EA RES 4 75 M W 1 SMT 12 7013 1 EA CBL M 2401 S 7inch PIG RG174 8303 618 ...

Page 20: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 14 September 2016 16 mm 9880V 110 Schematic ...

Page 21: ...7002 801 1 EA CRYSTAL INSERT 7002 803 1 EA REFLECTICVE RING 7002 804 1 EA CONN ADAPTER 7002 805 1 EA CONNECTOR PULL 7002 806 1 EA 3 X 3 inch NaI CRYSTAL 01 5235 1 EA PM TUBE 1 125inch B29B07 01 5367 1 EA RECPT UG568 U PANEL C FLANGE 13 7752 1 EA O RING 2 262 16 8313 6 EA SCREW 6 32 X FH 17 8600 1 EA LUG 4 LKG 1HL K908 18 8760 1 EA NUT 4 40 SMALL PATTERN 20 9022 6 EA WIRE TEFLON WHITE 22 HV 21 8993...

Page 22: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 16 September 2016 ...

Page 23: ...onitors Ludlum Measurements Inc Page 17 September 2016 Reference Description Part Number 1 125 inch Tube Socket Board used in the Model 44 162 1 EA CIRCUIT BOARD 5002 570 1 EA CAP 0 01 µF 3kv 04 5525 1 EA RES 1 M W 1 12 7844 9 EA RES 10 M W 1 12 7996 ...

Page 24: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 18 September 2016 1 125 inch Tube Board Schematic ...

Page 25: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 19 September 2016 Energy Response Curves ...

Page 26: ...Model 44 157 44 159 44 159 1 44 162 Gamma Pipe Monitors Ludlum Measurements Inc Page 20 September 2016 ...

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